w888必发_必发国际娱乐_必发888娱乐城 20,000 tons raw material production line raw material workshop flotation and dynamic calcination reconstruction

w888必发_必发国际娱乐_必发888娱乐城 20,000 tons raw material production line raw material workshop flotation and dynamic calcination reconstruction
I. Market Analysis
   China is the country with the most abundant magnesite resources in the world and is also China's dominant mineral resources. As of 2002, a total of 27 magnesite deposits have been discovered in China, mainly in Liaoning, Shandong and other regions, followed by Xinjiang, Tibet and Gansu. Among them, Liaoning has the most abundant reserves, accounting for 85.6% of the country's total reserves. It is famous for its large reserves and high quality.
   The main characteristics of China's magnesite are uneven regional distribution, relatively concentrated reserves, and large-scale mineral deposits. Among the 20 ore deposits, 10 large mining areas have 94% of China's total reserves. China's magnesite ore has high grade and fine texture. The primary and secondary products with reserves of Mg0 >43% accounted for 53%, of which, the primary product (including special grades) reserves of 1.17 billion tons accounted for 37.6% of the reserves, and the secondary products accounted for 480 million tons. 15. 4%.
    Although China's natural magnesite resources are very abundant, after several decades of exploitation, commercial-grade magnesite has become less and less, especially high-grade magnesite can no longer meet production needs in some areas. The low-grade magnesite cannot be directly used for the production of high-grade products. In particular, a large amount of extra-grade ginger and magnesium cannot be used, resulting in the waste of magnesite resources. Therefore, from the consideration of long-term benefits, in order to make better use of resources, the use of beneficiation methods to remove the impurities of silicon in the magnesium ore, the low-grade magnesite into excellent calcined.
Refractory material. To solve the problem of low utilization of magnesite resources and shortage of high grade magnesite.
    The purpose of beneficiation of magnesite is to remove harmful impurities and increase the grade of ore, mainly to solve the problem of separation of silicate gangue minerals and magnesite.
    The beneficiation of magnesite began in the early stage of the Second World War. Since then, methods such as heavy-medium beneficiation, flotation, and thermal separation have come into being.
   (1) Hot selection. Hot selection is to calcine magnesite at 800 °C ~ 1000 °C, forming a porous, light body, low pressure strength particles. The strength of talc, chlorite, etc. containing silicate minerals is gradually increased, and the strength of dolomite is 30 to 33 times higher than that of calcined magnesite. Using this difference, the calcined magnesite is crushed, sieved, and classified, and the magnesite can be enriched into fine-grained grades.
    (2) Reselection method. Re-election is mainly a method of sorting using the difference between the density of magnesite and impurity minerals. The main methods include jigging, shaking and heavy media. Since the proportion of magnesite and gangue minerals is not much different, the effect of directly treating magnesite by gravity separation method is very poor. However, after calcined magnesite for 30 minutes, the density of magnesite can be reduced from 2.7g/cm3~2.8g/cm3 to 1.3g/cm3~1.4g/cm3. The American magnesite ore dressing section adopts heavy medium dressing. method.
    (3) Chemical beneficiation. Chemical beneficiation is used to treat magnesite where the impurities are finely disseminated or exist in homogeneous phase. The ore or calcined ore is usually leached with a leaching agent, and the impurities are precipitated and separated by different methods. According to the different leachate,
Learning method is divided into hydrochloric acid, bicarbonate, ammonium and so on. The chemical method is also called leaching.
    In addition, there are also radiation sorting methods, magnetic separation, electric selection, bio-microbial leaching, etc., which are rarely used.
    The determination of magnesite ore beneficiation method is closely related to the cause and form of mineralization, impurity composition, etc., and is related to the quality requirements of the concentrate. Therefore, detailed mineralogy analysis and beneficiation tests are required, and the best test methods and procedures are selected based on the test data. Therefore, according to the specific causes and occurrences of magnesite, the most suitable method for ore dressing is selected. This project adopts chemical mineral separation method.
II. Prospect Analysis
    The company implements flotation of raw materials workshops and dynamic calcination to expand and expand, replaces manual sorting with mechanical flotation, and configures effective anti-silicon, calcium, and other impurities in both positive and negative flotation processes to increase ore purity and achieve automated production. It also realizes the effective use of low-grade ore. The dynamic calciner is used to produce light burned magnesium oxide by flotation dewatering concentrate powder with low-grade magnesian ore. It has strong speciality, simple technological process, low energy consumption, easy operation and harmless discharge. The market prospect of this project is quite broad.
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