Flotation method and pretreatment method for calcite-containing phosphorus ore

A technology for calcite and phosphate rock, applied in flotation, solid separation and other directions, can solve the problems of large amount of acid, poor sorting performance, harsh process conditions, etc., and achieve the effect of improving inhibition, efficient separation and simple method.

Active Publication Date: 2020-06-26
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

The process conditions are relatively harsh, and the amount of acid used will make the calcite more water-absorbing and difficult to float. The amount of acid used is small, the surface of the calcite will not change much, and the separation performance will be poor during flotation.
[0006] When treating phosphate rock containing calcite, the traditional phosphate rock flotation process adopts the method of adding collector flotation to remove it. The properties of calcite and phosphate minerals are too close, and it is often difficult to separate high-grade phosphorus concentrate. Phosphate concentrate has a low recovery rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1, a kind of flotation pretreatment method that contains calcite phosphate rock, this method is to add surface treatment agent and inhibitor to the phosphate rock slurry that contains calcite before flotation slurry adjustment; Described surface treatment agent For sulfuric acid or sulfurous acid or oxalic acid. Stirring was carried out while processing, and the stirring time was 30 minutes. The addition amount of surface treatment agent is 0.5kg / t raw ore. The inhibitor is a mixture of water glass, sodium fluoride and sodium lignosulfonate. The mass ratio of water glass, sodium fluoride and sodium lignosulfonate is 10:1:1.

Embodiment 2

[0019] Embodiment 2, a kind of flotation pretreatment method that contains calcite phosphate rock, this method is to add surface treatment agent and inhibitor to the phosphate rock slurry that contains calcite before flotation slurry adjustment; Described surface treatment agent For sulfuric acid or sulfurous acid or oxalic acid. Stirring was carried out while processing, and the stirring time was 120 minutes. The addition amount of surface treatment agent is 10kg / t raw ore. The inhibitor is a mixture of water glass, sodium fluoride and sodium lignosulfonate. The mass ratio of water glass, sodium fluoride and sodium lignosulfonate is 10:4:3.

Embodiment 3

[0020] Embodiment 3, a kind of flotation pretreatment method that contains calcite phosphate rock, this method is to add surface treatment agent and inhibitor to the phosphate rock slurry that contains calcite before flotation slurry adjustment; Described surface treatment agent It is a combination of sulfuric acid and sulfurous acid, each accounting for half. Stirring was carried out while processing, and the stirring time was 60 minutes. The addition amount of surface treatment agent is 2kg / t raw ore. The inhibitor is a mixture of water glass, sodium fluoride and sodium lignosulfonate. The mass ratio of water glass, sodium fluoride and sodium lignosulfonate is 10:2:3.

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Abstract

The invention discloses a flotation pretreatment method for calcite-containing phosphorus ore. According to the method, a surface treating agent and an inhibitor are added into phosphorus ore slurry containing calcite before flotation. Precipitates generated by reaction of the surface treating agent and the calcite are attached to the surface to change the surface property, and the inhibitor can be better adsorbed to the surface of the calcite. The invention also discloses a flotation method of the calcite-containing phosphorus ore, which comprises the following steps: adding a pH regulator and a collecting agent after the pretreatment of the flotation pretreatment method of the calcite-containing phosphorus ore is completed, stirring and mixing slurry, carrying out froth flotation after slurry mixing to obtain rough concentrate, and concentrating the rough concentrate to obtain high-grade phosphate concentrate. The methods are used for treating phosphorus ore with high calcite content, and are simple in process, low in cost and high in recovery rate.

Description

technical field [0001] The invention relates to a flotation method for calcite-containing phosphate rock, which belongs to the field of comprehensive utilization of phosphate rock resources. Background technique [0002] Among the proven phosphate rock reserves in my country, more than 80% are medium and low-grade phosphate rocks. It is necessary to enrich phosphate minerals through mineral processing to meet the raw material standards for preparing phosphorus products. In the flotation process of phosphate rock, the most common gangue components are silicate minerals and carbonate minerals. Silicate gangues are mainly silicon-containing minerals such as quartz, chalcedony, mica, and clay. These gangues are mainly Remove by scrubbing desliming, forward flotation desilication or reverse flotation desilication. Carbonate gangue is mainly dolomite and calcite. Dolomite has better buoyancy than phosphate minerals under acidic conditions. Therefore, dolomite gangue can be remove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/02B03B1/04B03D103/06
CPCB03D1/021B03B1/04B03D2203/06
Inventor 刘养春宋文义杨勇朱孔金冯春晖
Owner BLUESTAR LEHIGH ENG INST CO LTD
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