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Method for recycling gallium in alunite concentrate

A technology of alunite and concentrate, applied in the field of gallium recovery, can solve the problems of harsh method conditions, long process flow, and little practical application value

Inactive Publication Date: 2012-06-27
ZIJIN MINING GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the second step of decomposition, the pH is controlled within the range of 0.1-1.0, the temperature is 104°C, and after stirring for 0.5h, gallium and iron enter the precipitated solid phase and return to the first decomposition device, while aluminum and alkali metals are enriched in the solution phase and are eliminated. Send it to the subsequent aluminum extraction process, so that gallium can be enriched and extracted after 30 cycles. This method has harsh conditions, long process flow, and high energy consumption, so the actual application value is not great
[0005] None of the above processes and research involves the process of comprehensively recovering gallium and alum from the circulating mother liquor in the alunite concentrate-roasting-acid leaching-crystallization process, so a comprehensive recovery of gallium and alum with simple process and good comprehensive recovery effect is sought The process is of great significance

Method used

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  • Method for recycling gallium in alunite concentrate
  • Method for recycling gallium in alunite concentrate
  • Method for recycling gallium in alunite concentrate

Examples

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Effect test

example 1

[0025] Example 1: Put the alunite concentrate in a muffle furnace for roasting at a temperature of 400°C and a time of 0.5 hours; leaching the obtained calcined sand with sulfuric acid under the conditions of L / S=4 and a temperature of 90°C , time 0.5 hours, acidity 50g / L, natural crystallization after acid leaching to obtain alunite product and mother liquor after crystallization, take out crystallized alum, add crystallization mother liquor to acidity 50g / L and return to calcined acid leaching, and cycle like this for 6 The crystallization mother liquor obtained after the second time contains gallium 100mg / L, adopts CL-TBP resin to adsorb gallium, adopts 0.15mol / L NH4Cl solution to carry out elution after adsorption saturation, and eluting barren solution returns calcination acid leaching to carry out circulation, and resin returns again Adsorption, the comprehensive recoveries of gallium and alum in this process are 95.3% and 95.8% respectively, and the alum yield is 1.95t a...

example 2

[0026] Example 2: The alunite concentrate is first placed in a fluidized bed furnace for roasting, the roasting conditions are temperature 500°C, time 1 hour; the obtained calcined sand is leached with sulfuric acid, the acid leaching conditions are L / S=5, temperature 90°C, time 1.0 hours, acidity 100g / L, natural crystallization after acid leaching to obtain alunite product and mother liquor after crystallization, take out the crystallized alum, add mother liquor after crystallization to acidity 100g / L and return to calcination acid leaching, cycle like this 10 times The obtained crystallization mother liquor contains gallium 160mg / L, adopts AR-16 resin to absorb gallium, uses 150g / L sulfuric acid solution to carry out elution after adsorption saturation, elutes barren solution and returns calcination acid leaching to circulate, and resin returns to re-absorb, The comprehensive recoveries of gallium and alum are 96.3% and 96.8% respectively, and the yield of alum is 2.0t alum / t...

example 3

[0027] Example 3: The alunite concentrate is first placed in an industrial microwave oven for roasting, the roasting conditions are a temperature of 600°C and a time of 0.5 hours; the obtained calcined sand is leached with sulfuric acid, and the acid leaching conditions are L / S=6, a temperature of 90°C, Time 1.0 hours, acidity 170g / L, natural crystallization after acid leaching to obtain alunite product and mother liquor after crystallization, take out the crystallized alum, add mother liquor after crystallization to acidity 170g / L, then return to calcination and acid leaching, and cycle like this for 15 The obtained crystallization mother liquor contains 250mg / L of gallium, adopts p507 resin to adsorb gallium, and uses 1.0mol / L NH4Cl solution to elute after the adsorption is saturated, and returns the eluted barren solution to calcination acid leaching for circulation, and the resin returns to re-adsorb. The comprehensive recoveries of gallium and alum in this process are 96.3...

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Abstract

The invention relates to a method for recycling gallium in alunite concentrate, characterized by comprising the steps of: floating the gangue of a copper ore with selected copper concentrate and sulfur concentrate to obtain the alunite concentrate; firstly, roasting the alunite concentrate to dewater the same, performing acid leaching and crystallization techniques on the dewatered calcine to obtain alum crystals and a crystallization mother solution, wherein the crystallization mother solution contains gallium, and the gallium content reaches to 100-300 mg / L after circulating the acid leaching technique on the calcine for multiple times; and performing such techniques as extraction and ion exchange, and the like, on the obtained mother solution containing gallium to extract the gallium. According to the invention, the comprehensive recoveries of the gallium and alum are respectively higher than 95%. The method of the invention has the advantages of simple technique, high recovery of gallium and alum, and good comprehensive recycle effect, etc.

Description

1. Technical field [0001] The invention relates to a method for recovering gallium from alunite concentrate, in particular to a method for comprehensively recovering gallium and alum from the alunite concentrate obtained by flotation of tailings obtained after selecting copper concentrate and sulfur concentrate from copper ore craft. 2. Background technology [0002] At present, the main raw materials for extracting gallium at home and abroad are by-products of bauxite and zinc smelting, etc., and there are also research reports on extracting gallium from gallium-containing secondary resources, coal soot, iron ore, corundum and other raw materials. More than 90% of the primary gallium in the world comes from the by-products of alumina production, and about 10% comes from the by-products of zinc smelting. Bauxite generally contains 30-80g / t gallium, with an average content of 50g / t. Although gallium is mainly extracted from bauxite, the extraction of gallium from bauxite als...

Claims

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Application Information

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IPC IPC(8): C22B58/00C22B1/02C22B3/06C22B3/26C01F7/76
CPCY02P10/20
Inventor 黄中省衷水平阮仁满王俊娥王瑞永伍赠玲邹来昌
Owner ZIJIN MINING GROUP
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