A kind of flotation method and pretreatment method of calcite-containing phosphate rock

A technology for calcite and phosphate rock, applied in flotation, solid separation and other directions, can solve the problems of difficulty in separating high-grade phosphate concentrate, harsh process conditions, and low recovery rate of phosphate concentrate, and achieves enhanced floatability. Sexual differences, reduced surface coverage, the effect of a simple method

Active Publication Date: 2022-05-27
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 pre-flotation treatment method for calcite-containing phosphate rock, the method is to add a surface treatment agent and an inhibitor to the calcite-containing phosphate rock slurry before flotation and slurry conditioning; the surface treatment agent For sulfuric acid or sulfurous acid or oxalic acid. The treatment was carried out with stirring, and the stirring time was 30 minutes. The addition amount of the 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 pre-flotation treatment method for calcite-containing phosphate rock, the method is to add a surface treatment agent and an inhibitor to the calcite-containing phosphate rock slurry before flotation and slurry adjustment; the surface treatment agent For sulfuric acid or sulfurous acid or oxalic acid. While processing, stirring was performed, and the stirring time was 120 minutes. The addition amount of the 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 was 10:4:3.

Embodiment 3

[0020] Embodiment 3, a flotation pretreatment method for calcite-containing phosphate rock, the method is to add a surface treatment agent and an inhibitor to the calcite-containing phosphate rock slurry before flotation and slurry adjustment; the surface treatment agent It is a combination of sulfuric acid and sulfurous acid, each of which accounts for half. The treatment was carried out with stirring, and the stirring time was 60 minutes. The addition amount of the 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 was 10:2:3.

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Abstract

The invention discloses a flotation pretreatment method for calcite-containing phosphate rock. In the method, a surface treatment agent and an inhibitor are added to calcite-containing phosphate rock pulp before flotation. The precipitate generated by the reaction between the surface treatment agent and calcite adheres to the surface to change its surface properties, and the inhibitor can be better adsorbed on the surface of calcite. The invention also discloses a flotation method for phosphate rock containing calcite. The method is to add a pH adjuster and a collector to the flotation pretreatment method of the phosphate rock containing calcite and then add a pH adjuster and a collector to stir and adjust the slurry. Carry out froth flotation to obtain rough concentrate, and after the rough concentrate is selected, high-grade phosphorus concentrate is obtained. The method of the invention is used to process phosphate rock with high calcite content, and has simple process, low cost and high recovery rate.

Description

technical field [0001] The invention relates to a flotation method for calcite-containing phosphate rock, belonging to the field of comprehensive utilization of phosphate rock resources. Background technique [0002] In my country's proven phosphate rock reserves, more than 80% belong to low-grade phosphate rock, and it is necessary to enrich phosphate minerals by beneficiation to meet the raw material standards for the preparation of phosphorus products. In the flotation process of phosphate rock, the most common gangue components are silicate minerals and carbonate minerals. Silicate gangue is mainly silicon-containing minerals such as quartz, chalcedony, mica, and clay. Sludge removal by scrubbing, positive flotation desilication or reverse flotation desilication. Carbonate gangue is mainly dolomite and calcite. Dolomite has better floatability than phosphate minerals under acidic conditions. Therefore, dolomite gangue can be removed by inhibiting reverse flotation of ph...

Claims

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Application Information

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Patent Type & Authority Patents(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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