Method for extracting germanium by thermally reducing and volatilizing germanium ores

A technology of germanium ore and fire method, which is applied in the field of germanium ore thermal reduction and volatilization to extract germanium, can solve the problems of promoting germanium volatilization and low carbon content, and achieve the effects of reducing volatilization time, improving recovery rate, and saving mixed combustion fuel

Inactive Publication Date: 2015-07-29
YUNNAN LINCANG XINYUAN GERMANIUM IND +1
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  • Abstract
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  • Application Information

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Problems solved by technology

Carbon has a strong reducing effect at high temperature, but because the carbon content of germanium ore is too low, it does not promote the volatilization of germanium to the greatest extent, so we consider adding a more effective reducing agent to promote the volatilization of germanium

Method used

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  • Method for extracting germanium by thermally reducing and volatilizing germanium ores
  • Method for extracting germanium by thermally reducing and volatilizing germanium ores
  • Method for extracting germanium by thermally reducing and volatilizing germanium ores

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Embodiment Construction

[0026] Implementation example 1:

[0027] The ingredients used are listed in Table 2.

[0028]

[0029] In the first step, weigh 50 g of germanium ore shown in Table 2 and add it to an ash dish; weigh 2.5 g of sodium hypophosphite to be added (accounting for 5% of the weight of germanium ore) and add it to a small beaker, and add 25 mL Dissolve it in water, then add it to the sample and mix it evenly with a glass rod, then wash the small beaker and glass rod with 10 mL of water and add it to the sample, then put the sample in an oven pre-heated to 90°C for 30 minutes to evaporate Lose a lot of water until almost dry.

[0030] In the second step, the sample was taken out of the oven and placed in a muffle furnace heated to 900 °C in advance, and then rapidly heated to 1000 °C for constant temperature roasting and volatilization for 1 h.

[0031] In the third step, after roasting and volatilization, cool down to 500°C, take out the ash dish and cool it to room temperature, an...

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Abstract

The invention discloses a method for extracting germanium by thermally reducing and volatilizing germanium ores, belongs to a germanium extracting method in the technical field of non-ferrous metallurgy, and in particular relates to a method for extracting the germanium by thermally reducing and volatilizing the germanium ores by taking sodium hypophosphite as a reducing agent. The method comprises the following steps: adding the sodium hypophosphite into the germanium ores, isolating air, increasing the temperature, roasting, volatilizing and gathering to obtain germanium concentrate, wherein the recovery rate of the germanium is higher than 96% during adding 2.5% of the sodium hypophosphite, roasting at 1000 DEG C, volatilizing and gathering. By virtue of the method, the main problems that in the prior art, the recovery rate difficultly exceeds 75% in the production process of enriching and extracting germanium from germanium ores through a pyrogenic process, the production cost for recycling germanium furnace slag through a secondary pyrogenic process is high, the recovery rate is low, and the wet-process treatment cost is high because of low quality of germanium concentrate can be solved.

Description

technical field [0001] The invention belongs to a method for extracting germanium in the technical field of nonferrous metallurgy, in particular to a process for extracting germanium from germanium ore through thermal reduction, volatilization, enrichment, and use of sodium hypophosphite as a reducing agent. Background technique [0002] Lignite is a favorable carrier for germanium enrichment. There is a large amount of organic matter that can fix germanium in lignite. Lignite in Bangmai Basin, Lincang City, Yunnan Province is currently one of the most important sources of germanium in the world. Because of the high value of germanium, coal The quality is too poor, and the calorific value is only 30%-40% of that of ordinary lignite. Therefore, it has been approved by the Ministry of Land and Resources to change it into a germanium ore. The metal reserves are about 800 t. Development and utilization, which mainly adopts fire combustion and enrichment to extract germanium, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B41/00
Inventor 普世坤包文东胡德才朱知国谢天敏李光文姚才伟鲍开宏吴王昌杨再磊谢高
Owner YUNNAN LINCANG XINYUAN GERMANIUM IND
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