A kind of forward and reverse flotation process of silicon-calcium low-grade colloidal phosphate rock

A positive and negative flotation, low-grade technology, applied in flotation, solid separation, etc., can solve the problems of reducing content, difficulty in obtaining phosphorus concentrate, etc., and achieve the effect of improving utilization rate

Active Publication Date: 2017-12-12
WUHAN INSTITUTE OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In phosphate rock flotation, direct flotation and single reverse flotation can only reduce the content of one of the gangue minerals, and it is difficult to obtain low-magnesium, low-sesquioxide, and low-silicon phosphorus concentrate

Method used

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  • A kind of forward and reverse flotation process of silicon-calcium low-grade colloidal phosphate rock

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: A kind of forward and reverse flotation process of siliceous calcareous colloidal phosphate rock, its steps are as follows:

[0021] 1) Silicon-calcium colloidal phosphate rock is crushed and ground to dissociate the mineral monomers, and the slurry is adjusted to a mass concentration of 20%, and then flows into the mixing tank, and the amount of 3.0kg / t raw ore is added to the slurry Sodium carbonate, 6.0kg / t raw ore water glass, adjust the pH value of the pulp to 9, and then add the fatty acid soap anionic collector MXO-135 with an amount of 2.0kg / t raw ore containing amide groups to adjust the pulp, and the pulp temperature is 20°C, after pulping, enter the positive flotation operation for aerated flotation, phosphate ore, carbonate minerals and some iron-aluminosilicate minerals enter the positive flotation foam product, and the positive flotation tailings are in the tank;

[0022] 2) The flotation foam flows into the reverse flotation stirring tank, a...

Embodiment 2

[0023] Embodiment 2: A kind of forward and reverse flotation process of siliceous calcareous colloidal phosphate rock, its steps are as follows:

[0024] 1) Silicon-calcium colloidal phosphate rock is crushed and ground to dissociate the mineral monomers, and the slurry is adjusted to a mass concentration of 40%, and then flows into the mixing tank, and the amount of 8.0kg / t raw ore is added to the slurry Sodium carbonate, the dosage is 0.5kg / t raw ore water glass, adjust the pH value of the pulp to 11, and then add the fatty acid soap anionic collector MXO-135 with an dosage of 0.5kg / t raw ore containing amide groups to adjust the pulp, the pulp The temperature is 35°C. After the slurry is adjusted, it enters the positive flotation operation for aerated flotation. Phosphate ore, carbonate minerals and some iron-aluminosilicate minerals enter the positive flotation foam product, and the positive flotation tailings are in the tank;

[0025] 2) The flotation foam flows into the ...

Embodiment 3

[0026] Embodiment 3: a kind of siliceous calcareous colloidal phosphate rock positive and negative flotation process, its steps are as follows:

[0027] 1) Silica-calcium colloidal phosphate rock is crushed and ground to dissociate the mineral monomers, and the slurry is adjusted to a mass concentration of 30%, and then flows into the mixing tank, and the amount of 5.5kg / t raw ore is added to the slurry Sodium carbonate, the dosage is 3.5kg / t raw ore water glass, adjust the pH value of the pulp to 10.25, and then add the fatty acid soap anionic collector MXO-135 with an dosage of 1.2kg / t raw ore containing amide groups to adjust the pulp. The temperature is 25°C. After the slurry is adjusted, it enters the positive flotation operation for aerated flotation. Phosphate ore, carbonate minerals and some iron-aluminosilicate minerals enter the positive flotation foam product, and the positive flotation tailings are in the tank;

[0028] 2) The flotation foam flows into the reverse ...

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PUM

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Abstract

The invention relates to a forward and reverse flotation process of siliceous-calcium low-grade collophosphine, comprising the following steps: 1) crushing and grinding the siliceous-calcium low-grade collophosphine to make phosphorus minerals and gangue mineral monomers Dissociate, then add water to adjust the slurry, and then enter the forward and reverse flotation to remove impurities in the ore and improve the grade of phosphate rock. Compared with the existing technology, the present invention has the following advantages: in phosphate rock flotation, adopting direct flotation and single reverse flotation can only reduce the content of one of the gangue minerals, adopting amphoteric collector positive and negative flotation It can reduce the content of silicate minerals, carbonate minerals and iron-aluminosilicate minerals. This process can obtain low-magnesium, low-sesquioxide and low-silicon phosphorus concentrates, and successfully realize siliceous-calcium collophosite The beneficiation enrichment can improve the utilization rate of phosphorus resources. It overcomes that the existing flotation process cannot be applied to the beneficiation of silicon-calcium collophosite with high content of high sesquioxide.

Description

technical field [0001] The invention relates to a forward and reverse flotation process of silicon-calcium low-grade colloidal phosphate rock. Background technique [0002] Phosphate rock is a non-renewable basic raw material for the production of phosphate fertilizers and phosphorus chemical products. my country is rich in phosphate rock, with a resource reserve of 16.786 billion tons and an average grade of 16.95%. The high-grade (30%) ore that can be directly used can only be mined for more than ten years. It is complex, finely distributed, poor dissociation, and high in gangue minerals such as silicate minerals, carbonate minerals, and sesquioxides. Its development and utilization is a worldwide problem. In phosphate rock flotation, direct flotation and single reverse flotation can only reduce the content of one of the gangue minerals, and it is difficult to obtain low-magnesium, low-sesquioxide, and low-silicon phosphate concentrate. Contents of the invention [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/02
Inventor 罗惠华李亮陈慧瞿定军饶欢欢杨婕刘连坤朱道鹏汤家焰苗华军侯慧芳张战利
Owner WUHAN INSTITUTE OF TECHNOLOGY
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