Price of mineral powder concentrator
Publish: 2021-03-29 00:05:01
1. Advantages of ceramic dry powder iron remover: 1. The structure of the whole machine is simple, and the transmission part is naked, which realizes the rapid maintenance and repair in the proction process
2, the transmission principle of the machine is very simple, the operation does not use water, and no sewage is generated, which effectively protects the environment
3. The sorting bucket of the machine is equipped with adjustable dividing plates, which are made of stainless steel, which can effectively ensure the service life of the machine, and avoid the possibility of rust affecting the mineral grade
4. The grade is obviously improved. The grade can be effectively improved after three roller magnetic separation. Compared with ordinary calcite iron removal equipment, the grade is increased by at least 10-15 grades
2, the transmission principle of the machine is very simple, the operation does not use water, and no sewage is generated, which effectively protects the environment
3. The sorting bucket of the machine is equipped with adjustable dividing plates, which are made of stainless steel, which can effectively ensure the service life of the machine, and avoid the possibility of rust affecting the mineral grade
4. The grade is obviously improved. The grade can be effectively improved after three roller magnetic separation. Compared with ordinary calcite iron removal equipment, the grade is increased by at least 10-15 grades
2. Unit 1 basic structure and characteristics of ancient Chinese economy lesson 1 developed ancient agriculture Multiple choice questions
question number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
} answers
C
C
d
d
C
d
C
a
d
b
b
b
b (1) the above materials reflect the proction mode of small-scale peasant economy in ancient China. This mode of proction first appeared in the spring and Autumn period. The progress of proction tools and farming technology is the reason for its emergence 2) The characteristics of this mode of proction are men's farming and women's weaving, and self-sufficiency 3) Self employed farmers are the main undertakers of taxes and corvee of the state, and the burden is heavy; Farmers' proction scale is small, the means of proction is limited, it is difficult to expand reproction, and the ability to resist natural and man-made disasters is poor. The small-scale peasant economy is very fragile, and the self-employed peasants often go bankrupt because of floods and droughts or the rapid levy of taxes
17. The original agriculture was just sowing and harvesting at first, and then slash and burn cultivation was adopted. With the emergence of proction tools such as Song Dynasty, seven or eight thousand years ago, China's agriculture entered the era of "ploughing" or "stone hoeing"; During the Shang and Zhou dynasties, there were a small number of bronze tools and farming tools, and they mastered the techniques of irrigation and drainage, fertilization, weeding and pest control; During the spring and Autumn period and the Warring States period, the use and popularization of iron and cattle farming, and the development of fertilization and irrigation technology marked the formation of iron plough cattle farming, a traditional farming method in ancient China
basic characteristics: independent development, self-contained system; intensive and meticulous farming; provide for oneself. Family is the basic unit of proction and life; Farmers have less means of proction and intensive farming; The combination of agriculture and cottage instry is a self-sufficient natural economy
I Multiple choice questions
lesson 2 progress of ancient handicraft instry
question number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1 answer
C
b
b
d
a
b
C
d
b
a
b
d
b 2、 Non multiple choice questions
16. (1) state owned handicraft instry, household handicraft instry and private handicraft instry 2) The government operates directly and carries out centralized large-scale workshop proction 3) Self sufficiency 4) The seeds of capitalism appeared
17. Development characteristics: ① the state-owned handicraft instry is developed. For example, metallurgical instry is leading the world; ② Folk handicraft instry is hard to operate. For example: Huang Daopo's contribution to
cotton textile instry; ③ It is famous all over the world. Examples: "silk country", "Silk Road" and "porcelain country"< The development of ancient commerce Multiple choice
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
"answer
b
C
d
d
d
C
a
C
d
d
d
d (1) the Yellow River Basin: Yuean, Luoyang; Yangtze River Basin: Yangzhou, Yizhou; Southeast coast: Guangzhou, Quanzhou 2) Bank, money order< (3) set up the municipal shipping department and formulate the municipal shipping rules 4) With the emergence of the counter shop and feiqian, foreign trade is developed< In Shang Dynasty, commerce was controlled by the government. During the spring and Autumn period and the Warring States period, the government's control of Commerce was broken, and many commodity markets and big businessmen appeared. The commercial development in Qin and Han Dynasties was difficult. In Sui and Tang Dynasties, commerce flourished, and there were many famous commercial cities. With the development of rural markets, there were cupboards and flying money
the commercial economy of the Song Dynasty was unprecedentedly prosperous, and jiaozi, the earliest paper currency in the world, appeared. In the Ming and Qing Dynasties, there was still a prosperous scene, a large number of agricultural and sideline procts became commercial
procts, and "commercial Gang" appeared
I Multiple choice question
lesson 4 ancient economic policy
1 question number
2
3
4
5
6
7
8
9
10
1L
12
13
14
15
1 answer
b
C
b
b
d
d
a
b
C
d 2、 Non choice questions
16. In the Warring States period, this thought played an important role in the development of feudal economy and laid an economic foundation for the establishment of feudal system 2) In the Qing Dynasty, it was still the thought of emphasizing agriculture and restraining commerce. Influence: this thought plays a certain role in the development of agriculture, but it seriously hinders the development of the germination of capitalism, causes the whole social economy to lag day by day, and leads to China's backward economic status
17. (1) the root cause is the development of proctive forces in the spring and Autumn period and the Warring States period, that is, the promotion of cattle farming with iron plow. The main way is the reform movement in various countries
(2) problems: land annexation; Law: Land tends to be privatized
I Multiple choice
unit 2: formation and development of capitalist world market
lesson 5: opening up a new route
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1 answer
a
C
d
B
d
b
a
d (1) from the 13th century to the 15th century, because Ottoman Turkey controlled the eastern Mediterranean sea route, the silk road was interrupted, and the communication between the East and the West was stopped, Europeans were full of magical and illusory subjective imagination about the East 2) The opening of new air routes; From then on, human beings began to develop in a decentralized and isolated way, and then they began to move towards the whole world 3) Material three reflects that the motive of material two's historical activities is to look for gold and other valuables
17. (1) with the development of commodity economy and the emergence of capitalism in Western Europe, people are increasingly eager for gold and silver The spread of Marco Polo's
biography enticed people to "seek gold" in the East; The traditional eastbound road was controlled by the Ottoman Empire; The rulers of Portugal and Spain actively supported overseas exploration activities; The church encouraged the spread of Catholicism 2) Seizing the colony
I Multiple choice questions
Lesson 6 colonial expansion and world market expansion
question number
L
2
3
4
5
6
7
8
9
10
ll
12
13
14
15
answers
d
d
C
b
a
C
C
d
d
C
C (1) occupation of land, plunder of wealth, genocide and trafficking in slaves. The direct cause: e to the genocide of the Native Americans, there was a shortage of labor in the United States, while the mining and planting instries in the American colonies needed a lot of labor 2) Slave trade is an important means of capital primitive accumulation,
promoted the development of European capitalism; The impact on Africa: the number of strong African labor force is significantly reced, the homes of black people are destroyed, the social economy is backward, and people are trapped in poverty and backwardness 3) The process of primitive accumulation of capitalism is a bloody process of plunder, and every step of the development of capitalism is the same. Cool colonial plunder is inseparable
from 17.17 to 18 century, the colonial expansion of Holland, France, Britain and other countries provided the original accumulation of capital for the development of capitalism in Western Europe, and promoted the development of capitalism in Western Europe; It has caused great destruction and disaster to the areas and people who were invaded by colonial forces; The capitalist world market will be further expanded
I Multiple choice questions
Lesson 7 the first instrial revolution
question number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
answers
d
C
d
C
a
B
d
C
d
C
d
b 2、 Non multiple choice questions
16. (1) the core content is machine proction instead of manual labor, factory instead of manual workshop (workshop); The change of social relations is to change all social differences into the opposition between workers and capitalists, that is, the society is divided into two opposing classes 2) "Civilization" refers to capitalism; The reason is "cheap procts"; The core is the advanced capitalist mode of proction 3) Positive significance: it has objectively impacted the backward social and economic system, spread the advanced
thought and mode of proction, so as to promote the backward countries and regions towards modernization
17. Point of view: from the perspective of historical development, the opening of the new air route accelerated the social differentiation, accelerated the decline of the feudal system in Western Europe, promoted the development of capitalism, and promoted the formation of the world market. Evaluation: the author's view is correct. The opening of the new air route enabled the western colonists to start large-scale colonial activities, accelerated the decline of the feudal system in Western Europe, and promoted the development of capitalism. At the same time, the relative isolation between continents has been broken, and the world has increasingly become an interactive and closely linked whole
I Multiple choice questions
Lesson 8 the second instrial revolution
1
2
3
4
5
6
7
8
9
10
1L
12
13
14
15 |
} answers
d
d
a
C
a
d
C
d
b
d
C
d 2、 (1) when Columbus sailed to America, he linked Eurasia and America together for the first time, and made great contributions to the exchanges among different regions and nationalities; The western colonists began to invade America and carried out cruel colonial rule and plunder for a long time 2) The first instrial revolution included cotton spinning instry, machine manufacturing instry, transportation instry, etc; The second instrial revolution included electric power instry, automobile instry and chemical instry (3) first, science and technology are closely integrated; Second, to develop heavy instry; Third, it occurs almost simultaneously in several advanced
capitalist countries. Enlightenment: Science and technology is the first proctive force, the progress of science and technology drives the development of proctive forces, and the development of proctive forces promotes the progress of history 4) Process: after the opening of the new air route, the colonial expansion of the Western powers ended the isolation of all parts of the world, strengthened the communication system of all parts of the world, and opened the curtain of forming the world market. The first instrial revolution further enhanced the strength of Western powers, accelerated the pace of colonial expansion of Western powers, and basically formed the world market. After the second instrial revolution, Western powers set off a frenzy to carve up the world, and the world market was finally formed< br /> 17．(1)
question number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
} answers
C
C
d
d
C
d
C
a
d
b
b
b
b (1) the above materials reflect the proction mode of small-scale peasant economy in ancient China. This mode of proction first appeared in the spring and Autumn period. The progress of proction tools and farming technology is the reason for its emergence 2) The characteristics of this mode of proction are men's farming and women's weaving, and self-sufficiency 3) Self employed farmers are the main undertakers of taxes and corvee of the state, and the burden is heavy; Farmers' proction scale is small, the means of proction is limited, it is difficult to expand reproction, and the ability to resist natural and man-made disasters is poor. The small-scale peasant economy is very fragile, and the self-employed peasants often go bankrupt because of floods and droughts or the rapid levy of taxes
17. The original agriculture was just sowing and harvesting at first, and then slash and burn cultivation was adopted. With the emergence of proction tools such as Song Dynasty, seven or eight thousand years ago, China's agriculture entered the era of "ploughing" or "stone hoeing"; During the Shang and Zhou dynasties, there were a small number of bronze tools and farming tools, and they mastered the techniques of irrigation and drainage, fertilization, weeding and pest control; During the spring and Autumn period and the Warring States period, the use and popularization of iron and cattle farming, and the development of fertilization and irrigation technology marked the formation of iron plough cattle farming, a traditional farming method in ancient China
basic characteristics: independent development, self-contained system; intensive and meticulous farming; provide for oneself. Family is the basic unit of proction and life; Farmers have less means of proction and intensive farming; The combination of agriculture and cottage instry is a self-sufficient natural economy
I Multiple choice questions
lesson 2 progress of ancient handicraft instry
question number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1 answer
C
b
b
d
a
b
C
d
b
a
b
d
b 2、 Non multiple choice questions
16. (1) state owned handicraft instry, household handicraft instry and private handicraft instry 2) The government operates directly and carries out centralized large-scale workshop proction 3) Self sufficiency 4) The seeds of capitalism appeared
17. Development characteristics: ① the state-owned handicraft instry is developed. For example, metallurgical instry is leading the world; ② Folk handicraft instry is hard to operate. For example: Huang Daopo's contribution to
cotton textile instry; ③ It is famous all over the world. Examples: "silk country", "Silk Road" and "porcelain country"< The development of ancient commerce Multiple choice
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
"answer
b
C
d
d
d
C
a
C
d
d
d
d (1) the Yellow River Basin: Yuean, Luoyang; Yangtze River Basin: Yangzhou, Yizhou; Southeast coast: Guangzhou, Quanzhou 2) Bank, money order< (3) set up the municipal shipping department and formulate the municipal shipping rules 4) With the emergence of the counter shop and feiqian, foreign trade is developed< In Shang Dynasty, commerce was controlled by the government. During the spring and Autumn period and the Warring States period, the government's control of Commerce was broken, and many commodity markets and big businessmen appeared. The commercial development in Qin and Han Dynasties was difficult. In Sui and Tang Dynasties, commerce flourished, and there were many famous commercial cities. With the development of rural markets, there were cupboards and flying money
the commercial economy of the Song Dynasty was unprecedentedly prosperous, and jiaozi, the earliest paper currency in the world, appeared. In the Ming and Qing Dynasties, there was still a prosperous scene, a large number of agricultural and sideline procts became commercial
procts, and "commercial Gang" appeared
I Multiple choice question
lesson 4 ancient economic policy
1 question number
2
3
4
5
6
7
8
9
10
1L
12
13
14
15
1 answer
b
C
b
b
d
d
a
b
C
d 2、 Non choice questions
16. In the Warring States period, this thought played an important role in the development of feudal economy and laid an economic foundation for the establishment of feudal system 2) In the Qing Dynasty, it was still the thought of emphasizing agriculture and restraining commerce. Influence: this thought plays a certain role in the development of agriculture, but it seriously hinders the development of the germination of capitalism, causes the whole social economy to lag day by day, and leads to China's backward economic status
17. (1) the root cause is the development of proctive forces in the spring and Autumn period and the Warring States period, that is, the promotion of cattle farming with iron plow. The main way is the reform movement in various countries
(2) problems: land annexation; Law: Land tends to be privatized
I Multiple choice
unit 2: formation and development of capitalist world market
lesson 5: opening up a new route
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1 answer
a
C
d
B
d
b
a
d (1) from the 13th century to the 15th century, because Ottoman Turkey controlled the eastern Mediterranean sea route, the silk road was interrupted, and the communication between the East and the West was stopped, Europeans were full of magical and illusory subjective imagination about the East 2) The opening of new air routes; From then on, human beings began to develop in a decentralized and isolated way, and then they began to move towards the whole world 3) Material three reflects that the motive of material two's historical activities is to look for gold and other valuables
17. (1) with the development of commodity economy and the emergence of capitalism in Western Europe, people are increasingly eager for gold and silver The spread of Marco Polo's
biography enticed people to "seek gold" in the East; The traditional eastbound road was controlled by the Ottoman Empire; The rulers of Portugal and Spain actively supported overseas exploration activities; The church encouraged the spread of Catholicism 2) Seizing the colony
I Multiple choice questions
Lesson 6 colonial expansion and world market expansion
question number
L
2
3
4
5
6
7
8
9
10
ll
12
13
14
15
answers
d
d
C
b
a
C
C
d
d
C
C (1) occupation of land, plunder of wealth, genocide and trafficking in slaves. The direct cause: e to the genocide of the Native Americans, there was a shortage of labor in the United States, while the mining and planting instries in the American colonies needed a lot of labor 2) Slave trade is an important means of capital primitive accumulation,
promoted the development of European capitalism; The impact on Africa: the number of strong African labor force is significantly reced, the homes of black people are destroyed, the social economy is backward, and people are trapped in poverty and backwardness 3) The process of primitive accumulation of capitalism is a bloody process of plunder, and every step of the development of capitalism is the same. Cool colonial plunder is inseparable
from 17.17 to 18 century, the colonial expansion of Holland, France, Britain and other countries provided the original accumulation of capital for the development of capitalism in Western Europe, and promoted the development of capitalism in Western Europe; It has caused great destruction and disaster to the areas and people who were invaded by colonial forces; The capitalist world market will be further expanded
I Multiple choice questions
Lesson 7 the first instrial revolution
question number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
answers
d
C
d
C
a
B
d
C
d
C
d
b 2、 Non multiple choice questions
16. (1) the core content is machine proction instead of manual labor, factory instead of manual workshop (workshop); The change of social relations is to change all social differences into the opposition between workers and capitalists, that is, the society is divided into two opposing classes 2) "Civilization" refers to capitalism; The reason is "cheap procts"; The core is the advanced capitalist mode of proction 3) Positive significance: it has objectively impacted the backward social and economic system, spread the advanced
thought and mode of proction, so as to promote the backward countries and regions towards modernization
17. Point of view: from the perspective of historical development, the opening of the new air route accelerated the social differentiation, accelerated the decline of the feudal system in Western Europe, promoted the development of capitalism, and promoted the formation of the world market. Evaluation: the author's view is correct. The opening of the new air route enabled the western colonists to start large-scale colonial activities, accelerated the decline of the feudal system in Western Europe, and promoted the development of capitalism. At the same time, the relative isolation between continents has been broken, and the world has increasingly become an interactive and closely linked whole
I Multiple choice questions
Lesson 8 the second instrial revolution
1
2
3
4
5
6
7
8
9
10
1L
12
13
14
15 |
} answers
d
d
a
C
a
d
C
d
b
d
C
d 2、 (1) when Columbus sailed to America, he linked Eurasia and America together for the first time, and made great contributions to the exchanges among different regions and nationalities; The western colonists began to invade America and carried out cruel colonial rule and plunder for a long time 2) The first instrial revolution included cotton spinning instry, machine manufacturing instry, transportation instry, etc; The second instrial revolution included electric power instry, automobile instry and chemical instry (3) first, science and technology are closely integrated; Second, to develop heavy instry; Third, it occurs almost simultaneously in several advanced
capitalist countries. Enlightenment: Science and technology is the first proctive force, the progress of science and technology drives the development of proctive forces, and the development of proctive forces promotes the progress of history 4) Process: after the opening of the new air route, the colonial expansion of the Western powers ended the isolation of all parts of the world, strengthened the communication system of all parts of the world, and opened the curtain of forming the world market. The first instrial revolution further enhanced the strength of Western powers, accelerated the pace of colonial expansion of Western powers, and basically formed the world market. After the second instrial revolution, Western powers set off a frenzy to carve up the world, and the world market was finally formed< br /> 17．(1)
3. The latest iron ore processing flowsheet iron ore processing flowsheet iron ore processing flowsheet iron ore processing flowsheet iron ore processing flowsheet iron ore processing flowsheet iron ore processing flowsheet iron ore processing flowsheet iron ore processing flowsheet iron ore processing flowsheet iron ore processing flowsheet iron ore processing flowsheet iron ore processing flowsheet iron ore processing flowsheet iron ore processing flowsheet iron ore processing flowsheet iron ore processing flowsheet iron ore processing flowsheet
in 1996, 214.97 million tons of iron ores were selected, accounting for 85.2% of 252.28 million tons of raw iron ores in China. Iron ore is selected to proce 85.857 million tons of iron concentrate powder, including 109.61 million tons of raw ore processed by key concentrators and 41.58 million tons of iron concentrate powder proced, accounting for 48.4% of China's iron concentrate powder output< (1) ore crushing
in China, the three-stage crushing process of coarse crushing, medium crushing and fine crushing is generally used to crush iron ore. Generally, 1.2m or 1.5m rotary crusher is used for coarse crushing, 2.1m or 2.2m standard cone crusher is used for medium crushing, and 2.1m or 2.2m short head cone crusher is used for fine crushing. After coarse crushing, the ore is not more than 1m in size, and then it is crushed by medium and fine crushing. The final proct with ore particle size less than 12mm is sent to the grinding tank< (2) grinding process
in China, most iron ore grinding processes adopt two-stage grinding process, and most small and medium-sized concentrators adopt one-stage grinding process. Due to the new process of fine screen regrinding, some concentrators have changed from two-stage grinding to three-stage grinding in recent years. Generally, the grinding equipment used is relatively small, and the maximum ball mill is 3.6m × 6m, maximum rod mill 3.2m × 4.5m, maximum autogenous mill 5.5m × 1.8m, gravel mill 2.7m × 3.6m
spiral classifier is basically used for classification after grinding. In order to improve the efficiency, some concentrators use hydrocyclone instead of secondary spiral classifier< (3) beneficiation technology
1. Beneficiation of magnetite is mainly used to beneficiate low-grade "Anshan type" magnetite. Due to the strong magnetism and good grinding and separation of ores, domestic magnetic separation plants all adopt stage grinding and multi-stage grinding processes. For coarse-grained magnetite, the former (primary grinding) is adopted, while for fine-grained and fine-grained magnetite, the latter (secondary or tertiary grinding) is adopted. A series of permanent magnetic separators developed by our country have realized permanent magnetization. After the 1970s, the new technology of fine screening and regrinding was popularized in the national magnetite concentrators, so that the concentrate grade was increased from 62% to 66%, which met the requirement of 65% put forward by the Ministry of metallurgical instry
2. Beneficiation of weak magnetic iron ore
is mainly used to separate hematite, limonite, Specularite, siderite, pseudo hematite or mixed ore, that is, the so-called "red ore". This kind of ore has low grade, fine disseminated grain size, complex mineral composition and difficult separation. Since the 1980s, the research on roasting magnetic separation, wet high intensity magnetic separation, weak magnetic flotation and gravity separation process, equipment and new kinds of reagents have been continuously improved, resulting in the continuous improvement of concentrate grade and metal recovery. For example, Qidashan concentrator of Anshan Iron and Steel Co. has adopted a new process flow of weak magnetic, strong magnetic and flotation, which has made encouraging achievements
3. Beneficiation of polymetallic syngenetic ore
this kind of ore has complex composition and various types, so the methods, equipment and processes used are also different, such as reverse flotation multi gradient magnetic separation, flocculation flotation, low intensity magnetic reverse flotation high intensity magnetic separation, low intensity magnetic positive flotation, roasting magnetic separation and other different processes used in Bayan Obo iron mine to improve the iron recovery, And comprehensive recovery of rare earth oxide. Panhua Iron Mine obtains about 53% TFE ferrovanadium concentrate by magnetic separation, and the tailings after magnetic separation obtain titanium concentrate and sulfur cobalt concentrate by low intensity magnetic scavenging high intensity magnetic separation gravity separation flotation dry electric separation, so as to recover titanium and cobalt. Iron, copper, cobalt, sulfur and other elements are comprehensively recovered in Daye Iron Mine by weak magnetic high magnetic and flotation< (4) sinter pellet technology
sinter technology is the main means of man-made rich ore in China. In 1996, a total of 160.956 million tons of man-made rich ores were proced, including 94.859 million tons of key enterprises, accounting for 58.9%, and 61.337 million tons of local state-owned enterprises, accounting for 38.1%
China's fine concentrate sintering technology has reached a considerable level. As early as the early 1950s, Anshan Iron and steel company successfully changed the proction method of acid sinter to that of alkaline sinter on the sintering machine. It was the first in the world to use hydrated lime or quicklime as flux to solve the problem of fine concentrate sintering< There are 419 sintering machines in China, with a total area of 15522m2, among which there are 22 sintering machines above 130m2, with a total area of 4107m2; 197 sintering machines of 24-129m2, with a total area of 9387m2; There are 200 sintering machines less than 24m2, with a total area of 2028m2. The 300m2 sintering machine, which was put into operation in Maanshan Iron and steel works on February 24, 1994, is the largest modern sintering machine designed, manufactured and built by ourselves except Baosteel
the main technical and economic indexes of sintering in China in 1995 are as follows: utilization coefficient 1.36t / (M2? h) The sinter grade is 53.00%, the calendar operation rate of sinter machine is 80.94%, the qualified rate of sinter is 84.92%, and the labor proctivity is 2170t / (H? A)
this information is provided by Gongyi Longtai heavy instry Manufacturing Co., Ltd. We warmly welcome new and old customers to our company for business negotiation. We sincerely look forward to your arrival.
in 1996, 214.97 million tons of iron ores were selected, accounting for 85.2% of 252.28 million tons of raw iron ores in China. Iron ore is selected to proce 85.857 million tons of iron concentrate powder, including 109.61 million tons of raw ore processed by key concentrators and 41.58 million tons of iron concentrate powder proced, accounting for 48.4% of China's iron concentrate powder output< (1) ore crushing
in China, the three-stage crushing process of coarse crushing, medium crushing and fine crushing is generally used to crush iron ore. Generally, 1.2m or 1.5m rotary crusher is used for coarse crushing, 2.1m or 2.2m standard cone crusher is used for medium crushing, and 2.1m or 2.2m short head cone crusher is used for fine crushing. After coarse crushing, the ore is not more than 1m in size, and then it is crushed by medium and fine crushing. The final proct with ore particle size less than 12mm is sent to the grinding tank< (2) grinding process
in China, most iron ore grinding processes adopt two-stage grinding process, and most small and medium-sized concentrators adopt one-stage grinding process. Due to the new process of fine screen regrinding, some concentrators have changed from two-stage grinding to three-stage grinding in recent years. Generally, the grinding equipment used is relatively small, and the maximum ball mill is 3.6m × 6m, maximum rod mill 3.2m × 4.5m, maximum autogenous mill 5.5m × 1.8m, gravel mill 2.7m × 3.6m
spiral classifier is basically used for classification after grinding. In order to improve the efficiency, some concentrators use hydrocyclone instead of secondary spiral classifier< (3) beneficiation technology
1. Beneficiation of magnetite is mainly used to beneficiate low-grade "Anshan type" magnetite. Due to the strong magnetism and good grinding and separation of ores, domestic magnetic separation plants all adopt stage grinding and multi-stage grinding processes. For coarse-grained magnetite, the former (primary grinding) is adopted, while for fine-grained and fine-grained magnetite, the latter (secondary or tertiary grinding) is adopted. A series of permanent magnetic separators developed by our country have realized permanent magnetization. After the 1970s, the new technology of fine screening and regrinding was popularized in the national magnetite concentrators, so that the concentrate grade was increased from 62% to 66%, which met the requirement of 65% put forward by the Ministry of metallurgical instry
2. Beneficiation of weak magnetic iron ore
is mainly used to separate hematite, limonite, Specularite, siderite, pseudo hematite or mixed ore, that is, the so-called "red ore". This kind of ore has low grade, fine disseminated grain size, complex mineral composition and difficult separation. Since the 1980s, the research on roasting magnetic separation, wet high intensity magnetic separation, weak magnetic flotation and gravity separation process, equipment and new kinds of reagents have been continuously improved, resulting in the continuous improvement of concentrate grade and metal recovery. For example, Qidashan concentrator of Anshan Iron and Steel Co. has adopted a new process flow of weak magnetic, strong magnetic and flotation, which has made encouraging achievements
3. Beneficiation of polymetallic syngenetic ore
this kind of ore has complex composition and various types, so the methods, equipment and processes used are also different, such as reverse flotation multi gradient magnetic separation, flocculation flotation, low intensity magnetic reverse flotation high intensity magnetic separation, low intensity magnetic positive flotation, roasting magnetic separation and other different processes used in Bayan Obo iron mine to improve the iron recovery, And comprehensive recovery of rare earth oxide. Panhua Iron Mine obtains about 53% TFE ferrovanadium concentrate by magnetic separation, and the tailings after magnetic separation obtain titanium concentrate and sulfur cobalt concentrate by low intensity magnetic scavenging high intensity magnetic separation gravity separation flotation dry electric separation, so as to recover titanium and cobalt. Iron, copper, cobalt, sulfur and other elements are comprehensively recovered in Daye Iron Mine by weak magnetic high magnetic and flotation< (4) sinter pellet technology
sinter technology is the main means of man-made rich ore in China. In 1996, a total of 160.956 million tons of man-made rich ores were proced, including 94.859 million tons of key enterprises, accounting for 58.9%, and 61.337 million tons of local state-owned enterprises, accounting for 38.1%
China's fine concentrate sintering technology has reached a considerable level. As early as the early 1950s, Anshan Iron and steel company successfully changed the proction method of acid sinter to that of alkaline sinter on the sintering machine. It was the first in the world to use hydrated lime or quicklime as flux to solve the problem of fine concentrate sintering< There are 419 sintering machines in China, with a total area of 15522m2, among which there are 22 sintering machines above 130m2, with a total area of 4107m2; 197 sintering machines of 24-129m2, with a total area of 9387m2; There are 200 sintering machines less than 24m2, with a total area of 2028m2. The 300m2 sintering machine, which was put into operation in Maanshan Iron and steel works on February 24, 1994, is the largest modern sintering machine designed, manufactured and built by ourselves except Baosteel
the main technical and economic indexes of sintering in China in 1995 are as follows: utilization coefficient 1.36t / (M2? h) The sinter grade is 53.00%, the calendar operation rate of sinter machine is 80.94%, the qualified rate of sinter is 84.92%, and the labor proctivity is 2170t / (H? A)
this information is provided by Gongyi Longtai heavy instry Manufacturing Co., Ltd. We warmly welcome new and old customers to our company for business negotiation. We sincerely look forward to your arrival.
4. There are a lot of mineral powder equipment. Basically, grinding equipment can be used, and Raymond mill is used more often
for details, you can refer to this, or you can ask customer service online
http://..com/question/251081073.html
.
for details, you can refer to this, or you can ask customer service online
http://..com/question/251081073.html
.
5. Raymond mill model has many kinds, the price is not the same
Raymond machine is a common grinding equipment, which is suitable for various kinds of mineral powder preparation, coal powder preparation, such as raw meal ore, gypsum ore, coal and other materials of fine powder processing.
Raymond machine is a common grinding equipment, which is suitable for various kinds of mineral powder preparation, coal powder preparation, such as raw meal ore, gypsum ore, coal and other materials of fine powder processing.
6. At present, the steel market is still in the decline channel, and the quantity is very small, most of them are on the wait-and-see. If the procts proced by the factory are not sold in time, it will cause difficulties in capital turnover and be forced to stop proction
the second is to purchase at the current spot price of raw materials. The cost is relatively high. The procts proced basically have no money in the market, and they will even lose money. If they stop proction, they will lose less; Most of the reasons why factories now insist on proction are that the price of ore powder in stock is not high, which is equivalent to a small profit. In addition to some other by-procts of power generation, they can maintain proction.
the second is to purchase at the current spot price of raw materials. The cost is relatively high. The procts proced basically have no money in the market, and they will even lose money. If they stop proction, they will lose less; Most of the reasons why factories now insist on proction are that the price of ore powder in stock is not high, which is equivalent to a small profit. In addition to some other by-procts of power generation, they can maintain proction.
7. Where are you going to go? If you want to put this project into proction, you need to communicate with the person in charge of the relevant manufacturer. Need to let the relevant person in charge to understand your specific needs, see if the manufacturer can do ah, and need to be based on the specific configuration to quote
generally, this kind of investment amount belongs to instry secrets. Specific you can consult the customer service of the relevant website or call the hotline
I hope it will be helpful to your question, please accept it!
generally, this kind of investment amount belongs to instry secrets. Specific you can consult the customer service of the relevant website or call the hotline
I hope it will be helpful to your question, please accept it!
8. Hello: magnesia is usually priced according to its final taste. Different tastes will definitely lead to different prices. I hope my answer will help you.
9. About 230
10. A good ore powder is 23000 yuan per ton. Now the sales volume of ore powder is not very good, and the price has not been too high. Now it's cost-effective to buy, so you can start.
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