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Pre-desiliconisation method for ore concentration of bauxite

A bauxite and pre-desilication technology, applied in the field of desiliconization, can solve the problems affecting the desiliconization efficiency of bauxite and eliminate aggregation, so as to improve the separation efficiency of aluminum and silicon, simplify the process flow and improve the utilization rate

Inactive Publication Date: 2009-05-27
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the grinding process of bauxite, due to the difference in grindability between silicon-containing minerals and diaspore minerals, a small amount of silicon-containing minerals are severely ground during the grinding process, resulting in extremely fine particle size. The interaction between the interfaces of the diaspore minerals is very strong, and it is difficult to eliminate the aggregation between these silicon-containing minerals and the aluminum minerals such as diaspore by adding only sodium carbonate, sodium hexametaphosphate, water glass and other slurry dispersants. Affects the desiliconization efficiency of bauxite to a certain extent

Method used

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  • Pre-desiliconisation method for ore concentration of bauxite
  • Pre-desiliconisation method for ore concentration of bauxite
  • Pre-desiliconisation method for ore concentration of bauxite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Bauxite raw ore contains Al 2 o 3 63.41%, SiO 2 is 10.87%, and the aluminum-silicon ratio (A / S) is 5.83.

[0025] Grind the raw bauxite ore, add 3kg / t of dispersant sodium carbonate during the grinding process, realize the enhanced dispersion of bauxite pulp, and obtain grinding products with a particle size of less than 0.074mm accounting for 90% of the grinding products, and feed them to the grinding Add flocculant sodium polyacrylate 10g / t to the mineral products, settle and separate after pulping, and extract the upper suspension (slime 1). Add 2 kg / t of dispersant sodium carbonate and water to the obtained sedimentation product to adjust the slurry, after vigorously stirring and scrubbing at 1000 rpm, settle and separate, and extract the upper layer suspension (sludge 2). The sedimentation product is concentrate (or coarse concentrate), and the test indicators are shown in Table 1.

[0026] The results in Table 1 show that, with the new method of the present in...

Embodiment 2

[0030] Bauxite raw ore contains Al 2 o 3 64.91%, SiO 2 is 10.15%, and the aluminum-silicon ratio (A / S) is 6.

[0031] Grinding the raw bauxite ore, adding 2kg / t sodium hexametaphosphate as a dispersant during the grinding process, to achieve enhanced dispersion of bauxite pulp, and to obtain grinding products with a particle size of less than 0.074mm accounting for 70% of the grinding products, Add flocculant carboxymethyl cellulose 2g / t to the grinding product, settling and separating after slurry adjustment, and extract the upper suspension (sludge 1). Add 1 kg / t of sodium hexametaphosphate as a dispersant and water to adjust the slurry to the obtained sedimentation product. After vigorously stirring and scrubbing at 1600 rpm, settle and separate, and extract the upper suspension (sludge 2). The sedimentation product is concentrate (or coarse concentrate), and the test indicators are shown in Table 2.

[0032] The results in Table 2 show that, with the new method of the ...

Embodiment 3

[0036] Bauxite raw ore contains Al 2 o 3 50.12%, SiO 2 It is 13.89%, and the aluminum-silicon ratio (A / S) is 3.5.

[0037] Grind the raw bauxite ore, add 7kg / t of dispersant sodium carbonate during the grinding process, realize the enhanced dispersion of bauxite slurry, and obtain the grinding product with a particle size of less than 0.074mm accounting for 55% of the grinding product, and feed it to the grinding Add flocculant sodium polyacrylate 15g / t to the mineral product, settling and separating after slurry adjustment, and extract the upper suspension (sludge 1). Add 5 kg / t of dispersant sodium carbonate and water to the obtained sedimentation product to adjust the slurry, after vigorously stirring and scrubbing at 1200 rpm, settle and separate, and extract the upper suspension (slime 2). Add 5 kg / t of dispersing agent sodium carbonate to obtain the sedimentation product, after 1200 rev / min strong stirring and scrubbing for the second time to adjust the slurry, sedime...

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Abstract

The invention discloses a method of ore dressing and pre-desilication of alumyte, comprising the following steps: a. the alumyte is treated by milling grinding, and is added with dispersant in the process of milling grinding; b. flocculating agent is added into the ground product of the alumyte obtained in the step a, and then the mixture is settled; c. the dispersant is added into the settlement product obtained in the step b, and settlement product (coarse) concentrated ore is obtained by stirring, scouring and settling separation. The process flow of the method is simple, can improve the separating efficiency of aluminium silicon, and can effectively realize the pre-desilication of alumyte; the obtained products can be directly taken as the raw material of alumina technique, or as the raw material of the next stage of ore dressing and desilication technique, so that the utilization rate of low-grade alumyte resources can be further improved.

Description

technical field [0001] The invention relates to a desiliconization method, in particular to a bauxite beneficiation pre-desilication method. Background technique [0002] With the rapid development of the alumina industry, the grade of diaspore bauxite resources is getting lower and lower, and the pre-desilication of this kind of bauxite with a low aluminum-silicon ratio is implemented to improve the yield of raw materials for alumina production. Grade is an effective way to solve this low aluminum silicon ratio bauxite resource. [0003] After the bauxite ore is ground, silicon-containing minerals are easily aggregated with aluminum minerals such as diaspore, which affects the separation between aluminum minerals and silicon-containing minerals. The current bauxite industrial production and existing research reports show that adding sodium carbonate, sodium hexametaphosphate, water glass and other slurry dispersants during the grinding process can significantly improve the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D3/06
Inventor 胡岳华李旺兴王毓华樊大林顾国华何平波陈湘清陈兴华
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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