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A method for enriching germanium from lignite

A technology of enrichment and lignite, which is applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of high acid content, environmental impact, and high extraction cost, and achieve the effect of high content, reduced acid volume, and easy promotion

Active Publication Date: 2017-12-01
HEBEI UNIV OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 amount 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 whirlpool furnace and is oxidized to GeO by the oxygen in the air after contacting with the air 2 And form granular mixed flue gas to discharge, dust in the flue gas is collected by electrostatic precipitator, obtain mixture dust; 80-90°C, keep stirring, and keep the temperature for 20-30min; (3) Electrolytic ...

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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, mainly used to make optical fibers, catalysts and infrared materials. In the past 30 years, germanium has increasingly become a supporting material for some high-tech, and 80% of germanium is concentrated in high-tech fields. The Gulf War showed the power of germanium infrared materials, countries competed to arm themselves with high technology, germanium used for optical fiber continued to grow, and it was also used as a catalyst for PET (ethylene phthalate) production. 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 firm trend, and the separ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B41/00C22B7/00C25C1/22
CPCY02P10/20
Inventor 孙玉壮赵存良李彦恒石志祥王金喜林明月张海岛赵珊珊孟志强
Owner HEBEI UNIV OF ENG