Rare earth metals - extraction equipment Hydrometallurgy extraction method of extraction of rare elements - zhengzhou
heavy rare earth resources in our country's ionic reserves accounted for 80% of the world's total, the heavy rare earth output accounts for more than 95% of world output, is strategic resource in our country has the absolute competitive advantage. Of ionic type rare-earth ore are mainly distributed in the south of jiangxi, guangxi, fujian, guangdong, hunan and other provinces and autonomous regions.
2, at present, China's rare earth smelting separation mainstream technology
in view of the different rare earth resources in China has developed a series of original rare earth smelting separation technology, widely used in industrial production, China's international status of rare earth production country.
at present, China's rare earth smelting separation mainstream technologies include:
1, sulfuric acid decomposition Water - P204 or carbon - ammonia transformation Saponification P507 - HCL system extraction separation;
2, oxidizing roasting - Hydrochloric acid leaching - Optimal solution - alkali Saponification P507 - HCL system extraction separation;
3, ammonium sulfate leaching - Carbon precipitation - ammonia Hydrochloric acid leaching - Saponification P507 extraction separation, naphthenic acid system.
the three process of annual production capacity of more than 300000 tons, about 85% of the world, more than 90% using solvent extraction separation, 2 n - product purity 5N。
3, resources and environment problems which restrict the development of the rare earth industry
the extraction and separation of ionic rare earth resources scattered, low grade, difficult, traditional leaching of ionic type rare-earth ore enrichment, separation and purification technology of the low recovery rate, high consumption, to produce a large amount of ammonia nitrogen or high salt waste water and waste residue containing radioactive substances such as serious environmental pollution problems, restricts the healthy and cycle development of rare earth industry.
in view of the rare earth industry resources and environment problems, Beijing nonferrous metal research institute and professor YouYan rare earth new materials co. , LTD. Xiao-wei huang, lead the team system was carried out by rare earth separation green chemistry basic theoretical research, put forward the use of calcium magnesium ammonium instead of alkali metal or alkaline earth metal, unbalanced centrifugal extraction instead of precipitation recycling and purification of enrichment of rare earth and other new ideas, invented the new technology of extraction and separation of ionic type rare-earth ore efficient green, from the source to reduce ammonia nitrogen, radionuclide pollution, water and material efficient recycling, is a new kind of clean production technology.
4, zhengzhou new extraction centrifugal extraction machine, become industry leaders
the new technology of the rare earth extraction in industrial application when there is a problem, that is extracted in 20 - flow ratio 50, huge volume of conventional extraction equipment, production efficiency is low, unable to realize the flow ratio and high flux. Zhengzhou extraction for rare earth metals extraction process, launched with independent intellectual patent products ( The patent number: ZL2014205865573) Product - — New type of centrifugal extraction machine, the perfect realization flow than the industry of rare earth ore extraction, extraction rate > 98. 5%.
this series of centrifugal extraction machine in 2016, left at chinalco guangxi chung rare earth concentrate has been successfully applied in production line, not only solved from � � type rare earth ore leaching in the process of enrichment, separation and purification of low utilization rate of resource recovery, such as the 'three wastes' pollution serious technical problems, and greatly reduces the equipment operation cost and manpower cost of output, vigorously promoted the further development of the rare earth green development technology.
zhengzhou new. cwl - M series centrifugal extraction machine also has the following advantages:
1, the equipment enclosure with steel lining fluoride materials, drum made of fluorine material resistant to strong acid corrosion;
2, device, cover an area of an area small, low power consumption, in the capacity of 50 m after/h, under the condition of the actual power consumption is only 2. 8 kw;
3, at the bottom of the bearing and mechanical seal, no leakage risk, greatly reduce the maintenance cost of equipment and labor intensity;
4, high degree of automation, good operating environment;
5, which can realize continuous operation and intermittent operation, high extraction efficiency. Five, conclusion
the new technology and the extraction equipment of ionic type rare-earth ore is a major reform of the production process, the whole world of rare earth metal mineral intergrowth, separation technology. Solved the high salt waste water from the source, ammonia nitrogen wastewater pollution and radioactive waste residues, rare earths circulation, green industrial production was realized.
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