Price of small vertical mill

2. Blockchain is still a concept at present
many fields are using this concept to promote
blockchain is divided into public chain, private chain and alliance chain
the real reconstruction is private, so as to ensure that it will not be changed, but it is too difficult

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4.

According to the main development trend of non-metallic mineral exploitation and utilization in the world and the current situation of non-metallic mineral resources and utilization in Henan Province, the development of non-metallic mineral instry in Henan Province must serve the economic construction of Henan Province and provide high-quality non-metallic mineral raw materials for the development of instry, agriculture and high-tech instry in Henan Province; At the same time, we should focus on the domestic and international markets, expand domestic and foreign sales, and increase the fiscal revenue of Henan Province. Give full play to the role of science and technology as the primary proctive force, strengthen the close cooperation between scientific research institutions, especially the National Research Center for comprehensive utilization of non-metallic mineral resources, luonai Institute, Sanmo Institute and other scientific research institutions, factories and mines, jointly tackle key problems, form a number of leading and exemplary achievements, and change the backward situation of only procing raw materials and primary processing procts as soon as possible, We should accelerate the transformation of non-metallic mining instry from simple labor-intensive to technological development, to the instrial development direction of deep processing procts, improve the economic benefits of factories and mines, and turn resource advantages into economic advantages

the nonmetallic minerals listed below are mainly developed in Henan Province from the 10th five year plan to 2010: ① kyanite, andalusite, sillimanite; ② Xinyang Shangtianti bentonite, perlite, zeolite, tuff and other non-metallic minerals; ③ Bauxite and refractory clay; ④ Graphite; ⑤ Rutile; ⑥ Sericite; ⑦ Nepheline syenite; ⑧ Natural alkali

in Henan Province, the following instries should be developed

In addition to large reserves, Henan Province also has a complete range of refractory minerals, including high alumina clay, hard clay (coke gem), soft and semi soft clay, bauxite, etc., as well as kyanite, bauxite, etc., which can be used to proce high-quality and special refractory materials Sillimanite, andalusite, forsterite and so on. At present, a proction scale of 2.5 million tons of raw ore and 1.5 million tons of refractory has been formed. However, the resources available for development and utilization are seriously insufficient, because there are more reserves of low-grade ores and less high-grade ores with high quality. Some foreign trade export units and refractories factories purchase high alumina mature materials with Al < sub > 2 < / sub > o < sub > 3 < / sub > content more than 85%, and aluminum factories only collect rich ores with Al / Si ratio greater than 8-10, which will inevitably lead to indiscriminate mining, with mining rate of only 30% - 40%, rapid rection of high-quality high alumina clay, destruction and waste of resources. In the face of this phenomenon, in addition to strengthening the administrative management of government departments, conscientiously implementing the "mineral resources law of the people's Republic of China" and making overall planning for resource development, it is more important to strengthen the research on Beneficiation and purification process of low and medium grade ores (al < sub > 2 < / sub > o < sub > 3 < / sub > content below 60%) to supplement the shortage of high-quality and high-grade ores, It not only ensures the sustainable and healthy development of refractory instry, but also ensures the demand of High Alumina ore for high alumina cement and alumina proction

The key to improve the quality of refractory clay mineral procts in our province is to rely on the progress of science and technology and improve the proction technology and equipment level of mining, beneficiation and calcination. In order to ensure the stability of ore supply and the quality of ore, measures such as homogenization should be taken to rece the mixed grade in the mining process. Improving calcining furnace and adopting advanced calcining furnace are important measures to improve the quality of refractory clay clinker. In the calcination proction, we should graally eliminate some earth shaft kilns with small diameter and small height difference between inlet and outlet, transform and popularize large calcination shaft kilns with diameter greater than 3.0m and height difference between inlet and outlet of 10m, and build some downdraft kilns with the diameter of 100m < sup > 3 < / Sup > or above or 0.3m in places where conditions permit × 60m rotary kiln, so that the quality of calcined clinker continues to improve, in order to enhance market competitiveness

depending on the progress of science and technology, the refractory clay proct structure of our province should be updated. High quality high alumina clay resources (DUJIAGOU, JIAJIAWA, etc.) should be further processed to proce high quality high alumina hard refractories such as magnesia alumina spinel and mullite

In view of the current situation of low concentrate grade, low recovery and poor economic benefit, it is necessary to strengthen the research on "three stone" beneficiation process. The concentrate grade of Kyanite in acidic pulp beneficiation process is higher than that in alkaline pulp beneficiation process, but the equipment is seriously corroded. Desliming operation takes away part of fine Kyanite and reces its recovery. The reagent system of alkaline pulp beneficiation process is more strict than the former, which has poor adaptability to the ore. in order to ensure the concentrate grade, sometimes the grade of the selected ore has to be increased, thus increasing the beneficiation cost. There are similar problems in the processing of sillimanite and andalusite, so it is very important to study the "three stone" processing technology in Henan Province

In the future, we should take Yinshan kyanite, Neixiang, Zhenping, Tong sillimanite and Xixia andalusite as the development objects, focus on the research on the technological characteristics of "three stone" minerals, and the comprehensive utilization of quartz, mica, garnet and other major associated minerals, so as to turn the resource advantages of "three stone" into economic advantages. In short, China's high aluminum mineral development and utilization base should be formed in Nanyang area, Henan Province, and its procts will occupy an important position in domestic and foreign markets

at present, the "three stones" in our province are mainly mining rich ore, high-quality ore, and selling beneficiation concentrate after beneficiation treatment, and the research on the proction of special refractory procts with them needs to be strengthened. It should be developed in the direction of high-grade series of andalusite brick, sillimanite brick and amorphous refractory. Increase the proportion of high-quality and high-grade refractory procts with high added value, and change the situation of only selling raw materials and low-grade procts

in order to meet the development requirements of domestic metallurgy and other high-temperature instries, and increase its share in the international market, a batch of high-quality synthetic refractory materials and high-efficiency procts with high technology content, good market prospect and instrialization should be developed as soon as possible, such as sintering materials, electric melting materials, rection nitriding materials, high-quality amorphous refractory materials, etc

to build a number of high-quality and efficient refractory raw material bases which are representative in technology and radiation in economy, and can drive related instries and have a certain scale. Such as thousand ton slide plate, thousand ton continuous casting nozzle, thousand ton vent plug, thousand ton high quality kiln furniture, thousand ton new unshaped refractory, thousand ton new century coke oven silica brick proction base

By adjusting the proct structure, the proportion of ordinary refractory procts decreased to less than 40%, the proportion of amorphous refractory materials increased to more than 35%, and the output value of high-quality and efficient refractory materials accounted for more than 70%. We will cultivate a number of leading enterprises with advanced management, strong technological innovation ability and annual output value of 100-500 million yuan

Second, strengthen the comprehensive utilization degree of Shangtianti non-metallic minerals, and strengthen the development of raw ore deep processing instry. Among them, perlite, bentonite, zeolite, tuff and other instrial reserves of large, good quality has been well-known at home and abroad. The mining area has a good economic, traffic and geographical environment. Although the mine has been developed for many years, the resources have not been reasonably utilized. Basically, the raw ore is sold, and the economic benefit is very poor. In order to get rid of this situation, we must fully and rationally develop and utilize all kinds of minerals in Shangtianti, strengthen scientific experiment and research, and expand the varieties and application fields of various deep-processing procts

The first is perlite, which is the main raw material of lightweight building materials. The rapid development of the construction instry puts forward higher requirements for building materials, which need a large number of new building materials with high strength, light weight, good heat and sound insulation performance, expanding the use area and improving the construction progress. According to the demand of construction market, the following procts should be developed: light perlite interior wall panel, light perlite exterior wall panel, light perlite wall block, perlite ceiling decorative panel, high-grade perlite roof insulation brick and tile, etc. To develop these procts, we should pay attention to solve the following technical problems

The first is to transform the existing perlite expansion furnace or introce a new type of expansion furnace. At present, the expansion ratio of the expansion furnace used is small, the - 60 mesh perlite can not be put into the furnace, the proction efficiency is low, and the pollution is serious, especially the glass shell perlite beads which meet the requirements of the construction instry can not be expanded. However, the Japanese bought a large number of Shangtianti perlite sand and proced various sizes of glass shell perlite beads, which were made into high-grade light-weight building boards of various colors

The second is to strengthen the research on comprehensive utilization of perlite powder and expand its application scope. Especially the utilization of - 60 mesh mineral powder. In addition to improving and manufacturing the new expansion furnace and expanding the size range of the slag powder, it is necessary to strengthen the experimental research on the silicon sources used as ceramic raw materials, perlite foam procts, filter aids, raw materials, abrasives, fillers and chemical procts, so as to solve the problem of resource waste and environmental pollution. p> The third is to develop the proction process of perlite plate. From preparation, mixing, molding, curing, drying to packaging and warehousing, a set of efficient, low-cost and complete proction process is formed, which completely changes the current backward proction mode of manual operation

Fourthly, it is necessary to develop a new and practical early strength curing adhesive, which is a necessary material for the proction of perlite plate. This adhesive must have the characteristics of good bonding effect, firmness, weather resistance, non-toxic and low price

In addition, new uses of perlite have been found. For example, as adsorbent: animal feces fast deodorization, activated with hydrochloric acid or sulfuric acid, used for purification of wastewater and waste; As carrier material: it is used as carrier of insecticide and herbicide, and it still has fluidity after reabsorption. It can also be used for perlite cement mortar, which has the characteristics of flame retardant and good insulation, and is 60% lighter than conventional cement mortar; If reinforced fiber is added, the anti cracking strength is high, and the perlite cement slurry is easy to use. Perlite powder is a kind of rubber and plastic filler with better quality

The main proct of Shangtianti bentonite ore is - 200 mesh calcium base powder after fine grinding of raw ore, which has poor technological performance and low economic benefit. In order to completely change the backward situation of relying mainly on the proction of - 200 mesh calcium based powder, we must first solve the problems of bentonite purification technology and equipment. Only the purified raw materials can be processed into high value-added procts. Aiming at the purification procts with different content of montmorillonite, organic bentonite, lithium-based bentonite, high-efficiency activated clay series procts and high-quality foundry clay were developed

At present, the zeolite ore in Shangtianti is mainly used as cement raw material, so its application in agriculture, environmental protection and other fields should be strengthened

the tuff of Shangtianti has high iron content, so it can be used as glass material instead of soda ash after removing iron

The Shangtianti non-metallic deposit is a variety of non-metallic deposits, which is a unique advantage. The mining area has a good economic, traffic and geographical environment, and has a certain foundation after years of development. It is necessary to strengthen the investment in Shangtianti mine, organize scientific and technological research, reform and update old equipment, focus on the proction of market-oriented deep processing procts, and graally build Shangtianti mine into a base for the comprehensive development and utilization of non-metallic mines in China

Graphite is one of the dominant non-metallic minerals in Henan Province, mainly distributed in the mountainous areas of Western and southwest Henan Province, with abundant reserves. Among them, Lingbao flake graphite ore and Xixia cryptocrystalline graphite ore are in the middle

5. James Monroe, the fifth president of the United States, is the founder of Monroeism<

date of birth and death: born in Westmoreland County, Virginia on April 28, 1758

died in New York City, New York State on July 4, 1831, New York)

term of office: March 4, 1817 March 4, 1821 March 4, 1821 March 4, 1825

Party: Democratic Republican Party

First Lady: Elizabeth kortwwright Monroe

Vice President: Daniel D. Tompkins

Monroe's ups and downs In 48 years, he served as a lawyer, a member of Parliament, a foreign envoy, a governor, a secretary of state, a secretary of the army, a president, and a chairman of the state constitutional assembly

when Monroe was president, the United States came into a period of peace building after the end of successive years of war. He emphasized national consciousness at home and vigorously explored territory abroad, creating favorable conditions for the development of American capitalism. In 1823, Monroe put forward the policy of American foreign policy in his state of the Union address, which is known as "Monroe declaration" or "Monroeism", that is, under the slogan of "America is America for Americans", Latin America is openly classified as the sphere of influence of the United States. Monroe, a miserable old man, died at his daughter's home at the age of 73< On April 28, 1758, James Monroe was born into a family of small farmers in Westmoreland, Virginia. Monroe's ancestors are Scots, his father Spence Monroe, a young carpenter, later served as a circuit judge. Her mother, Elizabeth Jones Monroe, is of Welsh descent. Although the Monroe family is not a famous family, it is well-off and belongs to the local upper class society. Monroe's parents have five children. Monroe is the longest of the boys

in his childhood, Monroe studied Latin and French for four years in a school run by a nearby pastor. In his spare time, he liked catching fish and birds, sailing, sometimes taking a hound, riding a horse to catch foxes and hares. He was in good shape. He was six feet tall just after he was ten years old< In 1774, at the age of 16, Monroe went to William and Mary College, a famous university in Virginia. At first, he could study hard. After the outbreak of the war of independence, he dropped out of school, took up arms, became a member of the "college company" of the college, received military training, and then embarked on the battlefield of fighting for the independence and freedom of the motherland< On December 2, 1823, Monroe presented to Congress the state of the Union address drafted by John Quincy Adams. The main content of the address on diplomacy was called "Monroe declaration", which was later called "Monroeism". Its content can be roughly summarized into three basic principles: the principle of "opposing European countries to seize colonies in America again", "non intervention" and "American system". Although this Monroe declaration has not been approved by Congress in the form of a resolution, for more than 100 years, it has become a tool used by the United States to oppose interference in American affairs by countries other than America, to prevent and further exclude the political influence of European powers in the Western Hemisphere, to "break away from contact" between America and Europe, thus clearing the way for the expansion of the United States in the Western Hemisphere, In particular, it has become a guide for US diplomacy in Latin America.

6. I don't like to grind corn when it's too big. It's easy to grind corn when it's too small. It's easy to grind corn when it's too small

7. Rice mill is mainly composed of fixed wrench, tightening nut wrench, brush, hopper, grinding wheel, wire brush, etc. The use of mechanical forces generated by mechanical equipment to peel and whiten brown rice is called rice mill
its working principle: when the sample (brown rice) flows into the whitening chamber from the hopper, the brown rice is squeezed in the whitening chamber e to the internal pressure and mechanical force of thallium pressing. After self friction and mutual friction between the brown rice and the grinding wheel, the husk of the brown rice can be quickly removed, and the whiteness of the white rice can be achieved within a certain time
there are three types of small rice mills in China: separate rice mill, combined rice mill and jet rice mill
the separable rice mill is easy to operate and the price is low, but the machine is aging and the quality of the milled rice is poor, so it is graally facing elimination
the combined rice milling machine can proce good quality rice, but its structure is complex and the price is expensive
the air jet rice mill, with good cost performance, can complete the shelling and whitening process at one time, and the finished rice is white and bright, which has become the mainstream proct in the market in recent years.

8. Processing method and process flow of coal series kaolin: the water washed kaolin is generally Sandy and muddy kaolin, and the calcined kaolin is generally coal series kaolin. The calcined kaolin processing process is as follows: first, the kaolin is ground into a very fine slurry, filtered, and then injected into the mold for molding. There should be a large container with heating equipment outside, and the large container can be turned over continuously, So that the kaolin inside can be heated evenly, and the kaolin can be processed by wet method. The wet process includes three stages: ore preparation, mineral processing and proct treatment. The preparation stage includes batching, crushing and ramming. Mineral processing and proct treatment may include hydraulic classification, flotation, selective flocculation, magnetic separation, chemical treatment (bleaching), pressure filtration, drying, calcination and other operations, so as to remove different impurities and improve the quality of procts. The application of kaolin in other instries depends on different raw ores. It must be processed into fine powder by kaolin grinding machine, Can be added to other materials. Various instries have specific requirements for the particle size and fineness of kaolin for different purposes. In order to meet the higher fineness requirements for kaolin in papermaking, plastic and rubber procts instries, it is necessary to increase the fineness of kaolin and adopt Raymond mill, high pressure Raymond mill and ultra fine Raymond Mill of Limai miner, so as to improve the proct quality. With the development of science and technology and the progress of processing technology of inorganic non precious metal mineral powder materials, kaolin is not only used as a high-quality raw material for silicate instry, but also widely used in papermaking, ceramics, rubber, plastics, coatings, petrochemical and other fields. At present, in the international paper coating market, the trade volume of kaolin is about 8 million T / A. Basically, it is supplied by the United States, Brazil, the United Kingdom and Australia. Only a very small amount of kaolin suitable for papermaking from other countries has entered the international market. The market distribution of kaolin is very scattered in the world. Generally speaking, the more developed the economy is, the more kaolin is used. It is estimated that the annual demand of kaolin in Japan is 1.3 million tons, that in Canada is 700000 tons, all of which are imported from the United States, and that in Southeast Asia is 850000 tons. Although China is rich in high-quality kaolin resources, e to the small scale of proction enterprises, poor equipment, backward proction process and technology, most of them can only proce medium and low-grade kaolin. The medium and high-grade kaolin still depends on imports, and the price is 2500 ~ 6000 yuan / T. According to the statistics of the customs, in 2000, the import and export of kaolin for high-quality coated paper board in China was 182760 tons, worth 38.2 million US dollars. It can be seen that there is a good domestic and international market prospect to strengthen the technological transformation of kaolin proction and invest in the development of medium and high grade kaolin in China

9. Summary of the most commonly used crushers for grinding, mineral processing and crushing
crusher refers to the crushing machinery whose particle size is more than 3mm and accounts for more than 50% of the total discharge. Crushing operation is usually divided into coarse crushing, medium crushing and fine crushing according to the size of feeding and discharging. According to the action of crushing force, crushers can be roughly divided into two categories: (1) crushers 2) Grinding machine. The crusher generally deals with large pieces of material, and the particle size of the proct is coarse, usually larger than 8 mm. Its structural feature is that there is a certain gap between the broken parts and they do not contact each other. Crusher can be divided into coarse crusher, medium crusher and fine crusher. Generally speaking, the material processed by the mill is fine, and the particle size of the proct is fine, up to 0. 074 mm, even thinner. Its structural feature is that the crushing parts (or medium) contact each other, and the medium used is steel ball, steel bar, gravel or ore block. But some machines have the function of crushing and grinding at the same time, such as autogenous mill. ∮5 five × 1 The upper limit of particle size of ore processed by 8m autogenous mill can reach 350-400mm, and the fineness of proct can reach - 200 mesh, accounting for about 40%

it can be divided into six categories according to crushing mode and mechanical structural characteristics (action principle)
(1) jaw crusher. The crushing action is that the movable jaw plate periodically presses the fixed jaw plate to crush the ore block sandwiched in it< (2) cone crusher. The ore block is between the inner and outer cones, the outer cone is fixed, and the inner cone swings eccentrically to crush or break the ore block
(3) roller crusher. In the gap between two opposite rotating round rollers, the ore block is mainly crushed continuously, but it also has the function of grinding and stripping, and the toothed roller surface also has the function of splitting< (4) vertical crusher. The ore block is broken by the impact of fast rotating moving parts. Belong to this category can be divided into: sand machine, hammer crusher; Cage crusher; Impact crusher
(5) grinding machine. The ore is crushed by the impact and grinding of grinding medium (steel ball, steel bar, gravel or ore block) in the rotating cylinder
(6) other types of crushers and grinders
a roller mill: the materials are crushed by rotating rollers< B. disc mill: the disc rotation of vertical axis or horizontal axis is used as crushing part
C. centrifugal mill. High speed rotating parts and medium are used to proce centrifugal force to complete crushing
D. vibration mill. High frequency vibration is proced by the rotating shaft, which makes the medium and material collide with each other to complete the crushing effect
all kinds of crushers have different specifications and different application ranges. At present, jaw crusher or rotary cone crusher are mostly used for coarse crushing in concentrator; The standard cone crusher is used for intermediate crushing; Short head cone crusher is used for fine crushing. Rod mill for rough grinding and ball mill for fine grinding
data source: Red Star Machinery and equipment knowledge