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Method for enriching germanium from germanium-bearing lignite soot
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A coal soot and enrichment technology, applied in the field of germanium enrichment, can solve the problems of complex components of condensed products and low recovery rate of germanium
Inactive Publication Date: 2019-03-01
GUANGDONG INST OF RARE METALS
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The condensed product obtained by this method has complex components and germanium exists in various forms, and me
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[0020] Example 1
[0021] Germanium-containing lignite soot: Ge 0.45%, SiO 2 43.69%, C 2.58%, Fe 13.38%, CaO 7.46%, Al 2 O 3 16.75%, MgO 3.10%.
[0022] The germanium-containing lignite soot, coal powder, and vulcanizing agent are mixed uniformly at a mass ratio of 1:0.10:0.10 to form pellets with a diameter of 10mm, which are dehydrated and dried at 100°C for use; put 107.40g of dried pellets in In a closed furnace, the temperature is increased to 600°C and air is introduced at a flow rate of 0.2L / min, and the temperature is continued to rise. The temperature is controlled to 1000°C and the heating time is 2 hours. The pellet residue is 96.00g, the germanium content is 0.102%, and the germanium volatilization rate is 63.58%.
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[0023] Example 2
[0024] The raw materials used are the same as in Example 1.
[0025] The germanium-containing lignite soot, coal powder, and vulcanizing agent are mixed uniformly in a mass ratio of 1:0.20:0.10 to form pellets with a diameter of 10mm, which are dehydrated and dried at 100°C for use; 107.72g of dried pellets are placed In a closed furnace, the temperature is increased to 600°C and air is introduced at a flow rate of 0.5L / min, and the temperature is continued to rise. The temperature is controlled to 1200°C and the heating time is 2 hours. The pellet residue is 96.71g, the germanium content is 0.063%, and the germanium volatilization rate is 76.95%.
Example Embodiment
[0026] Example 3
[0027] The raw materials used are the same as in Example 1.
[0028] The germanium-containing lignite soot, coal powder, and vulcanizing agent are mixed uniformly at a mass ratio of 1:0.20:0.20 to form pellets with a diameter of 20mm, which are dehydrated and dried at 100°C for use; 114.50g of dried pellets are placed In a closed furnace, the temperature is raised to 600°C and air is introduced at a flow rate of 0.6L / min, and the temperature is continued to rise. The temperature is controlled at 1200°C and the heating time is 6 hours. The pellet residue is 96.30g, the germanium content is 0.023%, and the germanium volatilization rate is 91.40%.
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Abstract
A method for enriching germanium from germanium-bearing lignite soot which includes, by weight, 0.2-1.5% of germanium, 10-20% of silicon and 10-40% of carbon includes the steps: mixing well germanium-bearing lignite soot, pulverized coal and a vulcanizing agent in a mass ratio of 1:(0.10-0.20):(0.05-0.20) to obtain pellets 10-20 mm in diameter, and dehydrating and drying at 100 DEG C; heating thedried pellets in a sealed furnace to 600 DEG C, introducing air under the flow of 0.1-1.0 L/min, continuing to heat to 800-1200 DEG C for vulcanizing, vulcanizing by heating for 2-6 hours to obtain pellet residue, and collecting enriched germanium from a soot collector. The method herein has lower application temperature and lower energy cost, is suitable for producing high-grade enriched germanium, and helps evidently reduce the reagent consumption of a chlorination distilling process and reduce the production and environmental protection costs.
Description
technical field [0001] The invention relates to a method for enriching germanium from germanium-containing lignite soot, in particular to a method for enriching germanium from germanium-containing lignite vortex furnace soot. Background technique [0002] Strategic scattered metal germanium is an important semiconductor material and an indispensable member in the field of new materials. Together with rare earths, it enjoys the reputation of industrial "gold". Widely used in semiconductor lighting, solar cells, electronic information, infrared optical instruments, optical fibers, metallurgy, chemical catalysts, medicine, nuclear physics detection, aerospace and other fields. Germanium rarely has independent deposits in nature, and is mainly associated with lead-zinc ore, lignite and other mineral resources. my country's germanium-containing lignite is mainly distributed in Bangmai, Ladong, Manghui and Dengga mining areas in Yunnan (the total germanium reserves are estimated ...
Claims
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