Method for selectively recovering alum and gallium from alunite concentrate

An alunite and selective technology, applied in the direction of improving process efficiency, etc., can solve the problems of little practical application value, harsh method conditions, long process flow, etc., and achieve the effect of good comprehensive recovery effect, low cost and simple process

Active Publication Date: 2013-05-15
ZIJIN MINING GROUP
View PDF6 Cites 12 Cited by
  • Summary
  • 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...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for selectively recovering alum and gallium from alunite concentrate
  • Method for selectively recovering alum and gallium from alunite concentrate

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] Example 1: the alunite concentrate is first placed in a muffle furnace for roasting, and the roasting condition is 400 ° C of temperature and 0.5 hour time; the calcined sand obtained is leached at a low sulfuric acid concentration once, and the primary leaching condition is L / S=4 , temperature 90 ℃, time 0.5 hours, acidity 40g / L, solid-liquid separation after acid leaching is completed, the solution is naturally crystallized to obtain alum product and the mother liquor after crystallization, the crystallized alum is taken out, and the crystallization mother liquor is added to the acidity of 40g / L and returned to For acid leaching of calcined sand, the leaching residue is slurried and then leached at high sulfuric acid concentration. Liquid separation, the filtrate is supplemented with sulfuric acid concentration to 150g / L and then returned to secondary acid leaching. The circulating liquid obtained after 5 cycles of this cycle contains 300mg / L of gallium, and ion exchan...

example 2

[0024] Example 2: Alumite concentrate is first placed in a muffle furnace for roasting, and the roasting condition is 500 ° C of temperature and 1 hour time; the calcined sand obtained is leached at a low sulfuric acid concentration once, and a leaching condition is L / S=5 , temperature 70 ℃, time 1 hour, acidity 60g / L, solid-liquid separation after acid leaching is completed, the solution is naturally crystallized to obtain alum product and mother liquor after crystallization, the crystalline alum is taken out, and the crystallization mother liquor is added to the acidity of 60g / L and returned to For acid leaching of calcined sand, the leaching residue is slurried and then leached for a second time under high sulfuric acid concentration. The secondary leaching conditions are: L / S=3, temperature 50°C, time 1 hour, acidity 180g / L, and solidification after acid leaching is completed. Liquid separation, the filtrate was supplemented with sulfuric acid concentration to 180g / L and th...

example 3

[0025] Example 3: Alumite concentrate is first placed in a muffle furnace for roasting, and the roasting condition is a temperature of 600 ° C and a time of 2 hours; the obtained calcine is leached at a low sulfuric acid concentration once, and a leaching condition is L / S=6 , temperature 80 ℃, time 1.5 hours, acidity 70g / L, solid-liquid separation after acid leaching is completed, the solution is naturally crystallized to obtain alum product and the mother liquor after crystallization, the crystallized alum is taken out, and the crystallization mother liquor is added to the acidity of 70g / L and returned to For acid leaching of calcined sand, the leaching residue is slurried and then leached at high sulfuric acid concentration. Liquid separation, the filtrate was supplemented with sulfuric acid concentration to 200g / L and then returned to secondary acid leaching. The circulating liquid obtained after 8 cycles of this cycle contained 240mg / L of gallium, and the gallium was extrac...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a method for selectively recovering alum and gallium from alunite concentrate, wherein the alunite concentrate is obtained through flotation from tailings after copper concentrate and sulfur concentrate are selected from copper ore. The method comprises the following steps of: calcining the alunite concentrate to obtain a calcine and leaching metal ions such as aluminum ions and potassium ions from the calcine under low sulfuric acid concentration firstly; after solid-liquid separation, crystallizing a filtrate to form alum and crystallization mother liquor; returning the mother liquor to the low sulfuric acid concentration for leaching to obtain leached residue, and leaching rare metal gallium from the leached residue under high sulfuric acid concentration after carrying out size mixing on the leached residue; after allowing the gallium to achieve a certain concentration by circulating leachate for multiple times, recovering the gallium in circulating solution by adopting an ion exchange or extraction method; and after gallium recovery, cooling the solution for crystallizing alum. Therefore the difficulties in recovering alum and scattered metal gallium from the alunite concentrate are solved.

Description

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

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22B1/02C22B3/06C22B3/20C22B21/00C22B26/10C22B58/00
CPCY02P10/20
Inventor 王瑞永衷水平彭钦华黄中省廖斌阮仁满
Owner ZIJIN MINING GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap