Method for recovering germanium from germanium extraction residues

A residue and filter residue technology, applied in the field of secondary extraction of germanium, can solve the problem of less than 70% recovery rate, and achieve the effects of reducing stockpiling, making full use of it and protecting the environment

Active Publication Date: 2011-09-14
LINCANG JIECAIBA COAL IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, due to the limitation of lignite composition, smelting furnace type, process control conditions and operating conditions of some companies, it is inevitable to generate such compounds, so the recov

Method used

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  • Method for recovering germanium from germanium extraction residues
  • Method for recovering germanium from germanium extraction residues

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Experimental program
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Effect test

Embodiment 1

[0034]Step 1: Put 500g of germanium extraction residue, with a moisture mass fraction of 52.40%, a residual wet germanium mass fraction of 0.26%, and a metal content of 1.30g, into a 5000mL Erlenmeyer flask, add 1000mL of tap water, and start the stirrer to stir evenly , placed on an electric furnace, heated to 80-85°C, stirred at 115 rpm, stirred and washed for 30 minutes, vacuum filtered, and 950 mL of filtrate was obtained. Because the filtrate contains a large amount of hydrochloric acid and germanium, it can be used as an alkali treatment, concentrated and neutralized for later use. Wash the filtered filter residue three times with 50 mL of boiling water, wash and filter to dry the water, and then transfer the washed filter residue to the original Erlenmeyer flask.

[0035] Step 2: Put the triangular flask on the temperature-controlled electric furnace, add 75g of sodium hydroxide and 1000mL of tap water, start the mechanical stirrer, the stirring speed is 115 rpm, after s...

Embodiment 2

[0040] Step 1: Put 500g of germanium extraction residue, with a moisture mass fraction of 56.12%, a residual wet germanium mass fraction of 0.68%, and a metal content of 3.4g, in a 5000mL Erlenmeyer flask, add 1250mL of tap water with a residue weight of 1250mL, and start the stirrer to stir After uniformity, place on an electric furnace and heat to 80-85°C, stir at 115 rpm, stir and wash for 40 minutes, and vacuum filter to obtain 980 mL of washing filtrate. Because the washing filtrate contains a large amount of hydrochloric acid and germanium, it is treated as an alkali and then concentrated and neutralized. Standby, wash the filtered filter residue three times with 60mL boiling water, wash and filter the water, and then transfer the washed filter residue to the original Erlenmeyer flask.

[0041] Step 2: Put the triangular flask on the temperature-controlled electric furnace, add 87.5g of sodium hydroxide and 1100mL of tap water, start the mechanical stirrer, the stirring s...

Embodiment 3

[0046] Step 1: Put 500g of germanium extraction residue, with a moisture mass fraction of 54.10%, a residual wet germanium mass fraction of 1.21%, and a metal content of 6.050g, into a 5000mL Erlenmeyer flask, add 1500mL of tap water with the weight of the residue, and start the stirrer to stir After uniformity, place on an electric furnace and heat to 85-90°C, stir at 120 rpm, stir and wash for 45 minutes, and vacuum filter to obtain 990 mL of washing filtrate. Because the washing filtrate contains a large amount of hydrochloric acid and germanium, it is treated as an alkali and then concentrated and neutralized. Standby, wash the filter residue three times with 75mL boiling water, filter the water after washing, and then transfer the washed filter residue to the original Erlenmeyer flask.

[0047] Step 2: Put the triangular flask on the temperature-controlled electric furnace, add 100g of sodium hydroxide and 1250mL of tap water, start the mechanical stirrer, the stirring spe...

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Abstract

A method for recovering germanium from germanium extraction residues relates to the technical field of wet process metallurgy, in particular to a method for extracting germanium for a second time from distillation residues after germanium extraction by wet process treatment. The method is implemented by the following technical steps: washing of germanium extraction residues for deacidification, heating pretreatment of sodium hydroxide, solution treatment by concentrated alkali, sodium chlorate oxidation and hydrochloric acid distillation to separate germanium, and preparation of germanium dioxide and the like. The method is used for recovering germanium from germanium extraction residues and germanium tetrachloride at the rate up to over 75%. The successful research of the germanium extraction technology has actually positive significance in high-efficiency recovery of germanium in the residues, full utilization of rare germanium resource, reduction of residue pileup, environmental protection and other aspects.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for performing wet treatment on a distillation residue after extracting germanium to perform secondary extraction of germanium. Background technique [0002] In the process of enriching and extracting germanium from germanium-containing lignite by fire method, when the germanium monoxide volatilization temperature is higher than 710°C, germanium mainly volatilizes into the dust collection system in the form of GeO, and most of the GeO It is oxidized by oxygen to form GeO 2 , adhere to the surface of coal soot particles after the temperature is lowered, and a small amount of unoxidized GeO also adheres to the surface of soot particles as the temperature decreases, and part of germanium volatilizes in the form of sulfide in germanium soot. Therefore, in coal soot, germanium except GeO 2 In addition to the existence of the form, there are also a small amount of Ge...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B3/04C22B41/00
CPCY02P10/20
Inventor 刘强何文智俸廷兰
Owner LINCANG JIECAIBA COAL IND
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