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Coarse grain reverse floatation magnesium removal method for phosphorus ore

A technology of reverse flotation magnesium removal and reverse flotation, which is applied in flotation, chemical instruments and methods, wet separation, etc., can solve the problems of phosphorus loss and increase process cost, and achieve the reduction of magnesium content and high magnesium discharge rate , the effect of simple process

Active Publication Date: 2015-07-29
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This not only increases the cost of the process, but also causes a large amount of phosphorus to be lost in the fines

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1, a method for coarse-grained reverse flotation magnesium removal of phosphate rock: high-magnesium and low-grade phosphate rock is crushed and ground, and the particle size composition of the flotation feed material is calculated by weight to meet the -200 mesh particle size of less than 50 %, then moved to the stirring tank of the flotation machine and added water to adjust the pulp until the mass concentration of the pulp was greater than 50%, and the pulp temperature was 10°C, and then added the regulator inorganic acid and the reverse flotation mixed collector to the pulp for adjustment Then add fresh water to carry out the operation of the reverse flotation system. The foam product is the reverse flotation tailings, which are discharged and piled up. The product in the tank is the low-magnesium phosphate ore concentrate.

Embodiment 2

[0015] Example 2, a method for coarse-grained reverse flotation magnesium removal for phosphate rock: crush and grind high-magnesium and low-grade phosphate rock, and the particle size composition of the flotation feed material is calculated by weight to meet the -200 mesh particle size of less than 50 %, then moved to the stirring tank of the flotation machine and added water to adjust the pulp until the mass concentration of the pulp was greater than 50%, and the pulp temperature was 30°C, and then added the regulator inorganic acid and the reverse flotation mixed collector to the pulp to adjust Then add fresh water to carry out the operation of the reverse flotation system. The foam product is the reverse flotation tailings, which are discharged and piled up. The product in the tank is the low-magnesium phosphate ore concentrate.

Embodiment 3

[0016] Example 3, a method for coarse-grained reverse flotation magnesium removal for phosphate rock: crush and grind high-magnesium and low-grade phosphate rock, and the particle size composition of the flotation feed material is calculated by weight to meet -200 mesh particle size less than 50 %, then moved to the stirring tank of the flotation machine and added water to adjust the pulp until the mass concentration of the pulp was greater than 50%, and the pulp temperature was 25°C, and then added the regulator inorganic acid and reverse flotation mixed collector to the pulp for adjustment Then add fresh water to carry out the operation of the reverse flotation system. The foam product is the reverse flotation tailings, which are discharged and piled up. The product in the tank is the low-magnesium phosphate ore concentrate.

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Abstract

The invention relates to a coarse grain reverse floatation magnesium removal method for phosphorus ore. The method comprises the following steps of crushing and grinding low-grade phosphorus ore, the floatation feeding granularity constitution satisfies the condition that the granularity of -200 meshes is lower than 50 percent according to the weight, transferring the ground phosphorus ore into a floatation machine stirring trough, mixing the ground phosphorus ore with water to form slurry with concentration more than 50 percent, wherein the temperature of the ore slurry is 10 to 30 DEG C, respectively mixing the ore slurry with an adjusting agent inorganic acid and a reverse floatation mixing capturing agent, carrying out the slurry regulation, replenishing fresh water, carrying out the reverse floatation systematic operation, wherein a foam product is reverse floatation tailings, discharging the reverse floatation tailings to be stacked, a product in the trough is low-magnesium phosphorus ore concentrate. The floatation feed is the coarse-particle high-magnesium phosphorus ore, by optimizing the reverse floatation operation and the chemical system, on the premise of regulating the slurry at the high concentration, the coarse-grain magnesium removal effect can be realized by adopting the reverse floatation mixing trapping agent on the basis of high-concentration slurry, the final magnesium content of the concentrate can be reduced, and the concentrate quality can be improved. The method also has the characteristics of simple flow, good sorting effect and high magnesium discharging rate.

Description

technical field [0001] The invention relates to the field of phosphate rock beneficiation, in particular to a coarse-grain reverse flotation magnesium removal method for phosphate rock. Background technique [0002] In my country's existing total reserves of phosphate rock, more than 90% are medium and low-grade phosphate rock, which can only be economically utilized after beneficiation and enrichment. Most of the low-grade phosphate rocks have a high content of magnesium, which mainly exists in the carbonate mineral dolomite. At present, the reverse flotation method is a more economical beneficiation and enrichment method for processing such minerals. In reverse flotation operations, inorganic acid inhibitors and fatty acid collectors are often used to remove dolomite and achieve the purpose of magnesium removal. Among them, fine-grained dolomite is easier to be excluded, while coarse-grained dolomite is less effective in removing impurities. If it is necessary to furthe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03D1/018B03D101/02B03D103/06
CPCB03B7/00B03D1/018B03D2201/02B03D2203/06
Inventor 刘云涛宋文义杨勇曹效权朱孔金
Owner BLUESTAR LEHIGH ENG INST CO LTD
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