Phosphorite reverse flotation process

A reverse flotation and process technology, applied in flotation, solid separation, etc., can solve the problems of high cost of mineral processing, low selectivity, poor inhibition, etc., and achieve the effects of high selectivity, improved recovery rate, and improved grade

Active Publication Date: 2013-07-24
远安县燎原矿业有限责任公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

In reverse flotation of phosphate rock, sulfuric acid and phosphoric acid are used as inhibitors of reverse flotation. There are larg

Method used

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  • Phosphorite reverse flotation process
  • Phosphorite reverse flotation process
  • Phosphorite reverse flotation process

Examples

Experimental program
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Effect test

Embodiment 1

[0016] 1) Yichang high magnesium phosphate rock contains P 2 o 5 28.54%, MgO6.03%, the raw ore is crushed to -12mm by a crusher, and then ground by a grinder, the grinding fineness is -0.074mm80.45%, and the slurry is added to the concentration of 20-50%. Flotation roughing first add H 2 SO 4 The dosage is 12kg / t raw ore, adjust the pH of the pulp to 5.2-6, then add citric acid and succinic acid as joint inhibitors, the mass ratio is 2:1, the dosage is 1.5kg / t raw ore, fatty acid anion type The amount of collector TSM-2 is 0.4kg / t raw ore, and the H 2 SO 4 Under the condition of 1kg / t raw ore, reverse flotation-coarse-sweep closed-circuit process test is carried out. The flow chart of the test is shown in Figure 1, and the concentrate P 2 o 5 34.52%, yield 77.19%, P2O5 recovery rate 97.71%. Using sulfuric acid, citric acid and succinic acid as combined inhibitors, the recovery rate increased by 3.78%, the yield increased by 4.01%, and the tailings grade decreased by 3.1...

Embodiment 2

[0018] Guizhou phosphate rock contains P 2 o 5 The content of MgO is 23.45% and 3.54%. The raw ore is crushed by a crusher, and then ground by a grinding machine. The grinding fineness is -0.074mm84.00%. Add water to adjust the slurry to a concentration of 20-50%. 2 SO 4 The dosage is 12.0kg / t raw ore, then add succinic acid and malic acid as combined inhibitors, the mass ratio is 3:1, the dosage is 1.5kg / t raw ore, and then add fatty acid anionic TSM-2 to collect agent, the dosage is 1.3kg / t raw ore, sweeping H 2 SO 4 Under the condition of 3.0kg / t raw ore, the reverse flotation-roughing-sweeping closed-circuit process test is carried out. The test flow chart is as follows figure 2 , get concentrate P 2 o 5 30.25%, yield 65.67%, P 2 o 5 The recovery rate was 84.71%.

Embodiment 3

[0020] The multi-element analysis of Sichuan phosphate rock is shown in Table 1, Table 1 Chemical multi-element analysis of phosphate rock

[0021] the element

[0022] Using positive and negative flotation at normal temperature, the grade of the raw ore is 17.71%. The raw ore is crushed by a crusher, and then ground by a grinding machine. The grinding fineness is -0.074mm91.8%. Add water to adjust the slurry to a concentration of 20-50%. The positive flotation adopts one roughing, one sweeping and one beneficiation operation. The dosages of roughing sodium carbonate, water glass and fatty acid anionic collector TSM-2 are 6.0kg / t raw ore, 2.0kg / t raw ore, 1.0kg / t raw ore, the dosage of selected water glass is 1.0kg / t raw ore, and the dosage of fatty acid anionic collector TSM-2 is 0.5kg / t raw ore; Sulfuric acid 6.0kg / t raw ore for roughing, citric acid and gallic acid (the mass ratio is 4:1) as joint inhibitor dosage 1.0kg / t raw ore, fatty acid anionic collector TSM-...

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Abstract

The invention relates to a phosphorite reverse flotation process which comprises the following steps: after carrying out ore crushing, ore grinding and size mixing on phosphorite, enabling the obtained product to enter the reverse flotation process, wherein ore pulp obtained after size mixing is added with sulfuric acid or phosphoric acid to form a regulator and an inhibitor and then is added with micromolecule organic acid to form a combined inhibitor for inhibiting phosphate minerals; carrying out reverse flotation to separate out carbonate minerals by using fatty acids or fatty acid soaps as a collecting agent so as to obtain high-grade low-magnesium phosphate concentrates. The phosphorite reverse flotation process has the following advantage that the micromolecule organic acid inhibitor is adopted to implement effective separation of collophanite and dolomite, so that the grade of the phosphate concentrates is improved, the grade of tailings is reduced and the recovery rate can be improved. Meanwhile, application of phosphoric acid and derivatives thereof to phosphorite reverse flotation is replaced, so that phosphorus resources are saved, service time of phosphate rock resources is prolonged and the defects in the prior art are overcome.

Description

technical field [0001] The invention relates to a phosphate rock reverse flotation process. Background technique [0002] Phosphate rock is an essential basic raw material for the production of phosphate fertilizers and phosphorus chemical products. my country's phosphate resource reserves are 16.786 billion tons, with an average grade of 16.95%. The high-grade ore that can be directly used can only be mined for more than ten years. Poor dissociation, and carbonate mineral content and other characteristics, its development and utilization is a worldwide problem. In reverse flotation of phosphate rock, sulfuric acid and phosphoric acid are used as inhibitors of reverse flotation. There are large amounts of sulfuric acid and phosphoric acid, poor inhibition and low selectivity, which makes the cost of mineral processing high. Contents of the invention [0003] The problem to be solved by the present invention is a kind of phosphate rock reverse flotation process proposed in...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03D1/018B03D101/06B03D101/02
Inventor 罗惠华汤家焰陈慧阮耀阳陈自强池汝安
Owner 远安县燎原矿业有限责任公司
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