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Method for enriching germanium from lignite

A lignite and enrichment technology, which is applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of environmental impact, high extraction cost, and high acid content, so as to reduce the amount of acid liquid, increase the content, and improve the purification rate Effect

Active Publication Date: 2015-09-09
HEBEI UNIV OF ENG
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Problems solved by technology

[0005] At present, the efficiency and extent of people extracting germanium from coal can no longer meet the needs of modern industrial development, the extraction cost is high, and the amount of acid used in the extraction process is large, which has a certain degree of impact on the environment

Method used

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Embodiment Construction

[0019] A method for enriching germanium from lignite, the enrichment steps are: (1) fire purification, breaking high-quality lignite into small particles with a fineness of less than 40 mesh, adding it from the top of the vortex furnace to burn in the vortex furnace , make the furnace reach a high temperature of 1100-1350°C, control the input of oxygen, make the furnace into a reducing atmosphere, the mass percentage of CO is 2-5%, the mass percentage of C is 4-6%, O 2 The mass percentage is 2-3%, so that the germanium in the coal exists in the form of GeO, and volatilizes into the flue gas in a high temperature environment, and the flue gas is discharged from the vortex furnace and is oxidized to GeO by the oxygen in the air after contacting with the air. 2 The mixed flue gas formed in granular form is discharged, and the dust in the flue gas is collected by an electrostatic precipitator to obtain the mixture dust; (2) acid solution soaking, the mixture dust obtained in step (...

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Abstract

A method for enriching germanium from lignite comprises the enrichment steps: (1) fire-method purification; (2) acid-liquid soaking; (3) electrolytic purification; and (4) purification and crystallization. The method has the beneficial effects that the germanium element is purified by adopting the method of fire method, hydrolysis and electrolysis, the purification rate of germanium is greatly improved, the amount of an acid liquid used in the hydrolysis process is greatly reduced, and the cost of the germanium element enrichment is reduced; and the obtained germanium enriched substance has relatively high germanium element content, eases the pressure of the germanium element enrichment, and is easy to popularize.

Description

technical field [0001] The invention relates to a method for enriching germanium from lignite. Background technique [0002] Germanium is a rare dispersed element, which is mainly used to make optical fibers, catalysts and infrared materials. In the past three decades, germanium has increasingly become a supporting material for some high-tech, and 80% of germanium is concentrated in high-tech fields. The power of germanium infrared materials was also shown in the war, countries competed to arm themselves with high technology, germanium used for optical fiber continued to grow, and as a catalyst for PET (ethylene phthalate) production, it also increased. Germanium occupies an increasingly important position in national economic development and national defense construction, and the consumption of germanium will increase day by day. The international market is short of germanium resources and the supply exceeds demand. In the future, the price of germanium will maintain a fir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B41/00C22B7/00C25C1/22
CPCY02P10/20
Inventor 孙玉壮张海岛林明月赵珊珊石志祥孟志强
Owner HEBEI UNIV OF ENG
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