Is live broadcasting of digital currency a fraud
the so-called "digital currency" launched by some institutions and enterprises and the so-called promotion of the central bank's issuance of digital currency may involve pyramid selling and fraud. The general public should raise their risk awareness, invest rationally and prudently, and prevent their interests from being damaged
the legal currency of China is RMB. RMB shall be uniformly printed and issued by the people's Bank of China. No unit or indivial may refuse to pay all public and private debts within the territory of China in RMB. The general public should establish a correct concept of currency, take good care of RMB and jointly maintain the normal circulation order of RMB
the functions of the monetary gold and silver Bureau of the people's Bank of China include the formulation and implementation of relevant monetary issuance and gold management measures; Undertake RMB management and anti-counterfeiting work.
1 The definition of mineral processing is ore dressing or concentration, which means ore enrichment. Then it is extended to mineral processing, which is called mining process in English. Mineral processing is to separate useful minerals from useless minerals by different methods based on the difference of physical or physicochemical properties of minerals, separate the symbiotic useful minerals as much as possible and enrich them into separate concentrates, eliminate the impurities harmful to smelting and other processing processes, improve the quality of mineral processing procts, so as to make full, reasonable and economic use of mineral resources
minerals are natural elements and natural compounds proced by natural physicochemical or biological actions in the crust, such as gold, silver, copper, pyrite, chalrite, galena and other natural compounds. These elements and compounds have their own physical properties, such as particle size, shape, color, luster, density, friction coefficient, magnetism, electricity, radioactivity, surface wettability, etc. These different properties provide the basis for different mineral processing methods
The role and status of mineral processing there are abundant mineral resources in nature, but the content is generally low except for a few rich ores, for example, many iron ores contain only 20% - 30% iron; The copper content of copper ore is less than 0.5%; The content of lead and zinc in lead-zinc ore is less than 5%; Beryllium oxide content of beryllium ore is 0.05% - 0.1%; Direct smelting of such ores is extremely uneconomic. General metallurgy has certain requirements for ore content. For example, the minimum content of iron in iron ore shall not be less than 45%; The lowest copper content in copper ore should not be less than 12%; The lead content of lead ore shall not be less than 40%; The zinc content of zinc ore shall not be less than 40%; Beryllium oxide content is not less than 8%. Before smelting, the ore must be enriched several times, dozens of times or even hundreds of times to meet the requirements of smelting processby means of mineral processing, it can provide "fine material" for smelting, rece the amount of smelting materials, and greatly improve the technical and economic indicators of smelting. In the process of mineral processing, a large number of waste rocks are removed, which reces the amount of slag. On the one hand, it reces the energy consumption and transportation costs, and correspondingly reces the metal loss in the slag, greatly improving the recovery rate of smelting. For example, a smelter can proce 3135 tons more crude copper per year by increasing the content of copper concentrate by 1%. An iron and steel company will increase the iron concentrate content by 1%, increase the blast furnace output by 3%, save limestone by 4% ~ 5%, and rece slag by 1.8% ~ 2%. At present, the content of magnetite is required to be more than 65% in China. If the content of iron concentrate is more than 68%, the direct steelmaking process can be adopted to greatly simplify the smelting process
The harm of harmful elements in smelting raw materials can be reced by beneficiation process, and the metal resources can be comprehensively recovered. Ore in nature often contains many useful components, such as copper, lead, zinc and other non-ferrous metals are often associated or associated in the same deposit; There are not only single iron ore, but also iron copper, iron sulfur, vanadium titanium iron and other associated ores. In smelting process, some symbiotic or associated elements in raw materials are often regarded as harmful impurities. For example, lead and zinc in raw materials for copper smelting are harmful impurities. Sulfur, phosphorus and other non-ferrous metals in raw materials are harmful impurities. But these impurities are separated and enriched by mineral processing technology in advance, and then smelted separately, which turns harm into benefitmineral processing is also an intermediate process in the smelting process to improve the overall economic benefits of the two processes. For example, the existing proction process of the smelter of Jinchuan Nonferrous Metals Company in China is to smelt the copper nickel mixed concentrate in electric furnace and blow it in converter to proce high matte. After slow cooling, it is crushed and ground. Copper concentrate and nickel concentrate are obtained by flotation, and alloy is obtained by magnetic separation. After that, copper, nickel and precious metals were extracted in their respective smelting systems
mineral processing is an essential and extremely important part of metallurgical, chemical, building materials and other instrial sectors. With the development of mineral processing technology, the instrial raw material base has been greatly expanded, so that those deposits which were too low in content or complex in composition to be used in instry have become useful deposits
In the past 20 years, with the rapid development of science and technology and economic construction, the demand for mineral resources is increasing day by day. The mining amount of mineral resources has doubled, the mining period has become shorter and shorter, the single rich ore easy to mine and beneficiate has become less and less, the mining amount of refractory composite ore with fine particle size and low content has become larger and larger, and the environmental protection requirements in the process of mineral procts processing have become higher and higher, All these need to be solved by mineral processing At present, the commonly used beneficiation methods are gravity separation, flotation, magnetic separation and chemical beneficiation, in addition to electric separation, manual separation, friction beneficiation, photoelectric beneficiation and radioactive beneficiation Gravity beneficiation is one of the oldest beneficiation methods, which is based on different mineral density and different settling velocity in medium (water, air, heavy medium, etc.). This method is widely used to separate coal and ores containing platinum, gold, tungsten, tin and other heavy minerals. In addition, iron ore, manganese ore, rare metal ore, non-metallic ore and some non-ferrous metal ore are also separated by gravity separationmagnetic separation is a separation method based on different magnetic properties of minerals. It is mainly used to separate ferrous and rare metal ores such as iron and manganese
Flotation is a method of mineral separation according to the different moistening properties of mineral surface. At present, flotation is the most widely used method, especially for fine disseminated ores. Flotation is the most effective method for the separation of complex polymetallic ores. At present, most ores can be treated by flotation Chemical beneficiation is a mineral processing technology based on the difference of chemical properties of minerals and mineral components, which uses chemical methods to change the mineral composition, and then uses corresponding methods to enrich the target components. At present, the treatment effect of oxidized ore is very obvious, and it is also one of the effective methods to treat and comprehensively utilize some poor, fine, miscellaneous and other refractory mineral raw materialsthe electric separation method is based on the different electrical properties of minerals
the manual separation method is based on the color and luster of minerals
Friction beneficiation is a method to separate minerals by using different friction coefficients of mineralsphotoelectric beneficiation is a mineral separation method based on the different intensity of reflected light
Radioactive mineral processing is a method of mineral separation using natural radioactivity and artificial radioactivity(III) beneficiation process
beneficiation is a continuous proction process, which is composed of a series of continuous operations, indicating that the process of continuous ore processing is beneficiation process (Fig. 6-7-1)
The mineral processing ofore is completed in the concentrator. No matter the size of the concentrator (small concentrator daily ore processing dozens of tons, large concentrator daily ore processing up to tens of thousands of tons), but no matter how complex the process and equipment, generally includes the following three most basic processes
preparation operation before separation: generally, the ore mined from the stope has a large particle size, which must be crushed and screened, ground and graded to separate useful minerals from gangue minerals, useful minerals and useless minerals, so as to achieve monomer separation and prepare for separation operation
separation operation: This is the key operation (or main operation) of mineral processing. According to the different properties of minerals, it adopts different mineral processing methods, such as flotation, gravity separation, magnetic separation, etc
proct treatment operation: mainly including concentrate dehydration and tailings treatment. Concentrate Dewatering usually consists of three stages: concentration, filtration and drying. Tailings treatment usually includes tailings storage and tailwater treatment
some concentrators, according to the ore properties and the needs of separation, are equipped with ore washing, pre throwing waste (i.e. pre discharging part of waste rock under coarse particle size) and physical, chemical and treatment operations, such as magnetic roasting of hematite
The application of mineral processing technology in Xinjiang mines can be traced back to ancient times. As far as 300 years ago, Xinjiang made use of the characteristics of large proportion of gold in every ditch of Altay area to wash gold from placer gold. This is the original prototype of gravity separation. However, before the founding of new China, there was no formal concentrator in Xinjiang, all of which were manual manual separation and manual panning, so the proction efficiency was extremely low, and only placer gold ores with large proportion difference and wolframite ores were selected by hand according to color. After the founding of the people's Republic of China, Xinjiang's mineral processing technology has made great progress. Magnetic separation technology has been applied to iron mines, and a magnetic separation plant with an annual processing capacity of 800000 tons has been built to continuously provide high-quality iron concentrate for iron and steel enterprises. Flotation has been applied to lead-zinc mine, copper mine and gold mine. Kangsu lead-zinc flotation plant, Kalatongke copper nickel flotation plant and Hatu gold flotation plant have been built successively, which has promoted the development of Xinjiang nonferrous instry. Gravity separation, flotation and magnetic separation are used in rare metal mines in Altay area of Northern Xinjiang to provide lithium, beryllium, tantalum, niobium and other rare metal resources for China's early national defense construction. The following are representative concentrators in Xinjiang Kangsu lead zinc ore flotation plant is the first mechanized flotation plant in Xinjiang, which started construction in 1952 with a design proction scale of 250 tons / day and put into operation in 1954. In the early stage, the plant mainly dealt with galena and sphalerite from shalitashi, Kashgar region, and began to deal with Wulagen lead-zinc oxide ore in 1961. When Kangsu concentrator was first put into operation, the flowsheet and reagent system designed by Soviet experts were used for flotation. In the flowsheet, cyanide and zinc sulfate were used as inhibitors of sphalerite, soda was used as pH regulator, and a small amount of sodium sulfide was added. Lead ore was first selected, and then zinc mineral was selected. The process has not achieved good economic indicators, most of the zinc ore is selected into the lead ore. After that, with the joint efforts of Chinese engineers and technicians and Soviet experts, through several times of technical transformation, the process structure, technical parameters and proction management were innovated and improved. Some German flotation machines were changed into Soviet type Mikhail 5A flotation machines with large aeration capacity. Hydrocyclone was used instead of spiral classifier. Middling regrinding cycle was strengthened, zinc flotation time was increased, alkalinity of zinc flotation pulp was reced, crushing particle size and steel ball loading were reasonably controlled, and technical operation regulations and technical supervision were strictly implemented. So that the indicators have been steadily improved. The recovery of lead increased from 71% to 90%, and the recovery of zinc increased from 13% to 41%. The beneficiation process is shown in the flotation process flow chart (Fig. 6-7-2) Xinjiang Bayi Iron and steel plant was built and put into operation in 1989, with a designed capacity of 800000 T / A, mainly dealing with high sulfur magnetite. After the ore is mined from the mine, it is transported to the concentrator. After two-stage crushing and one-stage grinding, the pulp enters the flotation magnetic workshop. The selected sulfur concentrate is sold to some chemical plants and fertilizers in XinjiangLiaoning Shanhe mining and Metallurgical Equipment Manufacturing Co., Ltd. is a limited liability company (solely owned by natural person) registered in Dadong District, Shenyang City, Liaoning Province on October 15, 2008. Its registered address is located at No. 35, Wanghua South Street, Dadong District, Shenyang City
the unified social credit code / registration number of Liaoning Shanhe mining and Metallurgical Equipment Manufacturing Co., Ltd. is 912101006795148242, and the enterprise legal person is Wang Xiying
the business scope of Liaoning Shanhe mining and Metallurgical Equipment Manufacturing Co., Ltd. is: design, manufacture and sales of metallurgical equipment; Mining equipment, spiral welded pipe, machine magnetic separator, filter, plate feeder, recer sales Projects that need to be approved according to law can only be operated with the approval of relevant departments.). In Liaoning Province, the total registered capital of companies with similar business scope is 462.6 million yuan, and the main capital is concentrated in 85 enterprises with the scale of 10-50 million and 1-10 million
check more information of Liaoning Shanhe mining and Metallurgical Equipment Manufacturing Co., Ltd. through aiqicha
if you take the initiative to reward the anchor, it's not a fraud
if you didn't give it to the anchor, how would the anchor know where your money is
generally, it does not belong to fraud.