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Method for sorting and separating ore from aluminum silicon mineral

A mineral, aluminum-silicon technology, applied in the direction of solid separation, flotation, etc., can solve the problems of large chemical consumption per unit of selected ore, difficult tailings settlement, and low classification efficiency, so as to facilitate settlement and product dehydration, fine ore concentrate Particle size reduction, the effect of saving grinding energy consumption

Inactive Publication Date: 2008-05-14
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the graded coarse particles after raw ore grinding are directly used as concentrates, and the fine particles enter the flotation process. The separation of minerals results in low slurry concentration of fine-grained minerals participating in the flotation operation, which leads to large chemical consumption per unit of ore selected, sticky foam, hard to break, and poor fluidity of foam; In the process, bauxite needs to be finely ground, high energy consumption, small mill capacity, and the difference in surface properties between coarse and fine grains, resulting in severe sinking of coarse grains, high tailings grade, low recovery rate, and difficult product dehydration; In the ore reclassification process, the technological process is very complicated, the tailings are difficult to settle, and the return water utilization rate is low
Moreover, the target mineral diaspore in bauxite has higher density and brittleness than gangue minerals. In addition, the classification efficiency of equipment is not high, and repeated grinding cycles are easy to over-grind, resulting in a decrease in the production capacity of the mill. Consumption increases, and the cost of beneficiation increases; moreover, the ore slime produced by over-grinding causes great difficulties for separation, product dehydration, and tailings settlement

Method used

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  • Method for sorting and separating ore from aluminum silicon mineral

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The low-grade bauxite in Jinnan, Shanxi Province was used as the test sample. The chemical composition is shown in Table 1, and the mineral composition is shown in Table 2.

[0023] Table 1 Chemical composition of low-grade bauxite in Jinnan, Shanxi

[0024] chemical composition

[0025] Table 2 Mineral phase composition of low-grade bauxite in Jinnan, Shanxi

[0026] Phase

[0027] Process equipment: The first stage grinding adopts grid type ball mill, the roughing equipment is micro-bubble flotation machine, the second stage grinding adopts overflow type grinding machine, and the grading equipment is hydrocyclone.

[0028] Technological process: see the process principle flow chart (attached drawing 1), using two selections and two screening processes.

[0029] Process parameters: The fineness of the first stage grinding is 40.7%, the fineness of the second stage grinding is 65.5%, the graded fineness -0.074mm content is 98%, and the reagent syste...

Embodiment 2

[0039] The low-grade bauxite in Shanxi Jinnan was used as the test sample, and the properties of the sample are shown in Table 1 and Table 2.

[0040] Process equipment: The first stage of grinding adopts a grid type ball mill, the roughing equipment is an inflatable mechanical agitation flotation machine, the second stage of grinding adopts an overflow type grinding machine, and the high-efficiency classification equipment is a hydrocyclone.

[0041] Technological process: see the process principle flow chart (attached drawing 1), using two selections and two screening processes.

[0042] Process parameters: The fineness of the first stage grinding is 77.23%, the fineness of the second stage grinding is 88.69%, the content of the high-grade fine-grained grade -0.074mm is 90.0%, and the chemical system is a conventional positive flotation chemical system.

[0043] Process indicators: see Table 5.

[0044] Table 5 Flotation index of Example 2

[0045] product

[00...

Embodiment 3

[0052] The low-grade bauxite in Shanxi Jinnan was used as the test sample, and the properties of the sample are shown in Table 1 and Table 2.

[0053]Process equipment: The primary grinding adopts a grid type ball mill, the roughing equipment is a flotation column, the secondary grinding adopts an overflow type grinding machine, and the grading equipment is a vibrating screen.

[0054] Technological process: see the process principle flow chart (attached drawing 1), using two selections and two screening processes.

[0055] Process parameters: The fineness of the first stage grinding is 62.4%, the fineness of the second stage grinding is 71.23%, the graded fineness -0.074mm content is 95%, and the reagent system is the conventional positive flotation reagent system.

[0056] Process indicators: see Table 7.

[0057] Table 7 Flotation index of Example 3

[0058] product

[0059] The concentrate was screened and analyzed, and the results of the screen analysis are s...

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Abstract

The invention relates to a mill run separation method for the aluminium silicon mineral, in particular to a diasporite type alumyte floatation desiliconizing method. The invention is characterized in that: after grinding the original aluminium silicon mineral, directly carrying through a rougher flotation, the surfaced foam is looked upon as the ore concentrate product or enters the chosen; grading the rougher flotation underset, the coarse fraction enters the second stage milling grinding, the milling grinding products returns to the rougher flotation; the fine fraction enters the scavenging operation; the sequence of choosing underset, scavenging foam returns to the operation before. The invention has the advantages of solving the problem of the reasonable grade distribution of the milling grinding and the mill run slurry, greatly reducing the ore concentrate minuteness grade, increasing the coarse fraction, and solving the problem of high moisture level in the filter products.

Description

technical field [0001] A method for beneficiation and separation of aluminum-silicon minerals relates to a method for flotation desiliconization of diaspore type bauxite. technical background [0002] With the rapid development of my country's aluminum industry, the dwindling of high-quality bauxite resources will seriously affect the sustainable development of my country's alumina industry. Applying economical and reasonable beneficiation methods to improve the grade of bauxite and remove harmful aluminosilicate impurities in diaspore bauxite is an effective way to solve this problem. At present, the positive flotation desilication technology and process of bauxite are relatively mature, and the key technology is reflected in the treatment method of coarse and fine particle size of bauxite after grinding. Among them, the graded coarse particles after raw ore grinding are directly used as concentrates, and the fine particles enter the flotation process. The separation of m...

Claims

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Application Information

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IPC IPC(8): B03D1/02B03B1/00
Inventor 李旺兴陈湘清陈兴华
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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