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Collophanite floatation method

A collophosphate and flotation technology, applied in flotation, solid separation and other directions, can solve the problem of not meeting the requirements of wet phosphoric acid production, and achieve the effects of saving pharmaceutical dosage, large processing capacity and small installed capacity

Inactive Publication Date: 2008-01-09
YUNNAN CHEM RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for medium-grade or low-grade collophosite with high silicon content and low magnesium content, only the magnesium oxide impurities in the raw ore are removed, and the phosphorus concentrate index still cannot meet the requirements for wet-process phosphoric acid production.

Method used

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  • Collophanite floatation method

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Ore sample from a mining area in Anning, Yunnan, raw ore P 2 o 5 The grade is 22.30%, and the MgO content is 2.42%. The process adopts the positive and negative flotation process: the grinding fineness is -200 mesh 94%, the grinding concentration is 32%, and the flotation temperature is normal temperature. Positive flotation agent dosage: water glass 7.0kg / t, collector 3.0kg / t. The positive flotation froth product enters the reverse flotation system. Reverse flotation agent dosage: sulfuric acid 7.0kg / t, collector 0.4kg / t. Phosphorus concentrate P after reverse flotation 2 o 5 Grade 29.47%, MgO content 0.68%, P 2 o 5 The recovery rate reached 84.58%, and the MgO removal rate reached 82.02%.

Embodiment 2

[0041] Ore sample from a mining area in Kunyang, Yunnan, raw ore P 2 o 5 The grade is 23.01%, and the MgO content is 5.12%. The process adopts the positive and negative flotation process: the grinding fineness is -200 mesh 90%, the grinding concentration is 30%, the flotation temperature is normal temperature, and the dosage of positive flotation agents is: water glass 6.0kg / t, collector 3.0kg / t. The foam product of positive flotation enters the reverse flotation system, and the dosage of reverse flotation agent is: sulfuric acid 7.0kg / t, collector 0.4kg / t. Its P 2 o 5 Grade 30.22%, MgO content 0.96%, P 2 o 5 The recovery rate reached 86.6 8%, and the MgO exclusion rate was 87.6 3%.

Embodiment 3

[0043] Ore sample from a mining area in Dongchuan, Yunnan, raw ore P 2 o 5 The grade is 21.76%, and the MgO content is 4.08%. The process adopts the positive and negative flotation process: the grinding fineness is -200 mesh 93%, the grinding concentration is 31%, the flotation temperature is normal temperature, and the dosage of positive flotation agents is: water glass 8.0kg / t, collector 3.2kg / / t. The positive flotation foam enters the reverse flotation system, the dosage of reverse flotation reagents: sulfuric acid 8.0kg / t, collector 0.6kg / t, after reverse flotation, phosphorus concentrate is obtained, and its P 2 o 5 Grade 29.84%, MgO content 0.89%, P 2 o 5 The recovery rate reached 85.02%, and the MgO removal rate was 86.48%.

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Abstract

The present invention discloses one kind of cellophane floating process, which has floatation columns applied for eliminate impurity and includes direct floatation to eliminate silicon and reverse floatation to eliminate magnesium. The cellophane floating process includes crushing crude cellophane, milling and grading to form 20-40 wt% concentration pulp; mixing the pulp with direct floatation reagent, and floatation in direct floatation columns to obtain foamed rough concentrate in the top and direct floated tailings in the bottom; mixing the foamed rough concentrate with reverse floatation reagent in one other mineralizing tank, and floatation in reverse floatation columns to obtain cellophane concentrate in the bottom and foamed reverse floated tailings. The process is simple and stable, and has easy control, high depurating effect, high concentrate quality, less phosphate loss and other advantages.

Description

technical field [0001] The present invention relates to the beneficiation method of phosphate ore, more specifically, the present invention relates to a kind of flotation method of collophanite. Background technique [0002] Phosphate minerals are important chemical raw materials. With the development of social technology and economy, the demand for phosphate rocks continues to increase, while the reserves of easy-to-mine rich ores and easy-to-select phosphate rocks are decreasing day by day. Therefore, how to effectively and economically enrich the poor and difficult-to-select phosphate rock has attracted widespread attention in the world's phosphate rock industry. In particular, the beneficiation technology of sedimentary siliceous-calcium-type medium and low-grade phosphate rocks with large reserves and difficult beneficiation is more attention-grabbing. Sedimentary phosphorite ore (the phosphorus-containing minerals are mainly collophoste) is the most important phosphat...

Claims

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Application Information

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IPC IPC(8): B03D1/02B03B1/00B03D1/002B03D1/04B03D101/06B03D101/02B03D103/06
Inventor 刘江林怕中能曾波夏敬源刘丽芬
Owner YUNNAN CHEM RES INST
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