Preparation of ultra-high purity rare earth environmental technology research Breakthrough

China is the world's largest rare earth metal and alloy producer and supplier countries, but in the technical aspects of the preparation of ultra-high purity rare earth metals are relatively backward.

To this end, "Twelve Five" period, 863 to set up the "ultra-high purity rare earth metals and alloys prepared by energy saving technology" topic in the field of new materials technology, led by the Beijing General Research Institute for Nonferrous Metals bear. After several years of research, the subject made ​​a series of significant progress, and in late June this year, the Ministry of Science passed the acceptance of experts organized.

By preparing rare earth metals, integrated innovation purification technology and equipment, ultra-pure rare earth metal preparation key breakthrough technology, independent design and development of ultra-high-vacuum distillation furnace, cold crucible melting furnace area, 14 sets of special purification equipment, to develop complete sets of ultra-high purity rare earth metals engineering technology; prepared 13 kinds of ultra-pure rare earth metals, which thulium, erbium, ytterbium, dysprosium four kinds of absolute purity rare earth metals 99.993% -99.995%, and rhenium (RE), carbon (C ), nitrogen (N), oxygen (O), hydrogen (H) and other 60 kinds of impurity content of less than 50-70ppm. Independent research group developed new energy saving ten thousand amps and rare earth metal scale key cell preparation techniques, completely changed the existing cell structure, through the low slot piezoelectric intelligent control solution and the electrolysis process, to achieve power consumption down to six degree / kg or less, more than 45% reduction in energy consumption, reduce consumption of rare earth fluoride and fluorine-containing flue gas volume of about 50%. In addition, the group also discussed the preparation of low-temperature molten salt electrolysis price change of magnesium-lithium alloy and samarium Sm price change of aluminum-lithium alloy technology to carry out research and development projects and made significant progress, you can replace the current high energy consumption, high pollution and variable price magnesium alloy rare earth rare earth production technology, significantly reducing manufacturing costs samarium (Sm) and other rare earth elements price change, has achieved 100-ton scale applications in the production line.

Implementation of the "ultra-high purity rare earth metals and alloys prepared by energy saving technology," the subject, so that our ultra high purity rare earth in preparation technologies and products, through independent innovation breakthrough in the long-standing foreign technology blockade, enhance the quality of China's rare earth products and added value, effectively enhance the core competitiveness of manufacturing enterprises, and promote China's rare earth industry to green direction electrolysis growing.

 

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