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Preparation method for trapping agent for bauxite flotation

A collector and bauxite technology, used in flotation, solid separation and other directions, can solve the corrosion of stainless steel equipment and other problems, and achieve the effect of reducing corrosion, reducing chloride ions, and strong collection ability

Inactive Publication Date: 2012-06-27
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the bauxite positive flotation process, the KL collector is generally selected, and the raw material hydroxylamine hydrochloride is used in the synthesis of the intermediate product hydroxamate, and the chloride ions in the hydroxylamine hydrochloride are finally transferred to the collector , the chloride ion content in the collector reaches 1.27g / L, and based on the monthly collector consumption of 2,500 tons, the chloride ion brought into the Bayer process alumina production process reaches 3.175 tons per month. These chloride ions The existence of the stainless steel equipment in the process may cause a certain degree of corrosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0012] A method for preparing a collector for bauxite flotation, adding caustic soda solution, hydroxylamine sulfate solution and methyl benzoate in a ratio of 2:1.2:1 into a reaction kettle equipped with a cooling water cooling device, at a temperature of 50 Carry out the hydroximation reaction at ~60°C for 6-8 hours to obtain a mixed solution containing sodium benzohydroxamate, sodium sulfate, methanol and water, and then transfer the mixed solution to the dilution tank, and press the mixing button in the dilution tank at the same time The dilution ratio of the solution to water is 1:4, add demineralized water and stir well, then send the obtained solution into the storage tank.

[0013] Below in conjunction with example the present invention will be further described.

Embodiment 1

[0015] Feed caustic soda, hydroxylamine sulfate, and methyl benzoate at a ratio of 2:1.2:1, control the reaction temperature at 60°C, cool down with cooling water, react for 6 hours to form a white milky mixture, and add this mixture at a dilution ratio of 1:4 Dilute with demineralized water to obtain the intermediate product benzhydroxamate solution. The KL collector is obtained by blending the intermediate product with oleic acid and surfactant in a certain proportion.

[0016] Al-Si ratio 4.35, AI 2 o 3 Content 60.20%, SiO 2 The bauxite raw ore with a content of 13.83% was ground with a ball mill for 5 minutes, and the grinding fineness was -0.074mm, which accounted for 75%. The flotation test was carried out in the laboratory with a small flotation machine through one roughing and one sweeping. Add the prepared KL collector according to the roughing addition of 800g / ton raw ore and the sweeping addition of 200g / ton raw ore.

[0017] Beneficiation index: aluminum-silic...

Embodiment 2

[0019] Feed caustic soda, hydroxylamine sulfate, and methyl benzoate at a ratio of 2:1.2:1, control the reaction temperature at 50°C, cool down with cooling water, react for 6 hours to form a white milky mixture, and add this mixture at a dilution ratio of 1:4 Dilute with demineralized water to obtain the intermediate product benzhydroxamate solution. The KL collector is obtained by blending the intermediate product with oleic acid and surfactant in a certain proportion.

[0020] Al-Si ratio 4.35, AI 2 o 3 Content 60.20%, SiO 2 The bauxite raw ore with a content of 13.83% was ground with a ball mill for 5 minutes, and the grinding fineness was -0.074mm, accounting for 75%. The flotation test was carried out in the laboratory with a small flotation machine through one roughing and one sweeping. Add the prepared KL collector according to the roughing addition of 800g / ton raw ore and the sweeping addition of 200g / ton raw ore.

[0021] Beneficiation index: aluminum-silicon ra...

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PUM

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Abstract

The invention relates to a preparation method for a trapping agent for bauxite flotation. The method is characterized by comprising the following steps of: undergoing a hydroxyl oximation reaction on a caustic soda solution, a hydroxylamine sulfate solution and methyl benzoate serving as raw materials to obtain a mixed solution containing sodium benzohydroxamic acid, sodium sulfate, methanol and water; and diluting the obtained mixed solution with water. The KL trapping agent prepared with the method has the advantages of high trapping capability, small using amount, good separating effect, effective reduction in chloride ions which are introduced into an alumina production flow, and effective reduction in corrosion of stainless steel equipment in ore dressing and the alumina production flow.

Description

technical field [0001] The invention relates to a preparation method of a collector for bauxite positive flotation desiliconization, in particular to a production method of hydroxamate, an intermediate product of the bauxite flotation collector. Background technique [0002] Bauxite beneficiation and desiliconization has found an effective way for the rational use of low-grade bauxite resources in my country. The industrial application of bauxite positive flotation process in the production of alumina by beneficiation Bayer method can effectively improve the utilization rate of bauxite resources in my country, thereby improving the market competitiveness of my country's alumina industry. [0003] Collector is the most critical technology for mineral flotation separation, and developing and synthesizing the most effective collector is an important way to improve flotation process and economic indicators. The collectors used in oxidized ore flotation are mainly oxidized paraf...

Claims

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Application Information

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IPC IPC(8): B03D1/018B03D101/02
Inventor 李庆刚李正东宋江红尹海军李太昌孙屏
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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