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A kind of forward and reverse flotation method of low-grade siliceous calcareous phosphate rock

A technology of silicon-calcium and colloidal phosphate rock, applied in flotation, solid separation, etc., can solve the problems of low grade of raw ore, concentrate ore does not meet the requirements of phosphate fertilizer processing, etc., and achieve the goal of reducing MgO content, improving grade and reasonable design Effect

Active Publication Date: 2017-07-18
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the sorting of this type of ore at home and abroad adopts flotation method for enrichment. The commonly used flotation processes include: positive and negative flotation, reverse flotation, double reverse flotation and direct flotation. For some Due to the low grade of raw ore, the concentrate obtained by two-stage flotation still does not meet the requirements of phosphate fertilizer processing.

Method used

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  • A kind of forward and reverse flotation method of low-grade siliceous calcareous phosphate rock

Examples

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Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1, a kind of forward and backward flotation method of low-grade siliceous calcareous collophosite, the method steps are as follows:

[0021] (1) Put a certain amount of crushed siliceous-calcium colloidal phosphate ore into the flotation tank to adjust the slurry to a mass concentration of 60%, and add phosphate mineral flotation regulator and Slurry is adjusted by the collector, and the material after slurry is added with water to a pulp mass concentration of 25%, and then enters the positive flotation system for positive flotation of phosphate minerals. The resulting foam product is positive flotation concentrate, and the product in the tank is positive flotation tailings; the phosphate mineral flotation regulator includes pH regulator sodium carbonate and positive flotation depressant water glass, the consumption of sodium carbonate is 0.5kg / t raw ore, and the consumption of water glass is 0.5kg / t raw ore; Described collector comprises fatty acid soap and ...

Embodiment 2

[0024] Embodiment 2, a kind of forward and backward flotation method of low-grade siliceous calcareous collophosite, the method steps are as follows:

[0025] (1) Put a certain amount of crushed silicon-calcium colloidal phosphate ore in the flotation tank with water to adjust the slurry to a mass concentration of 80%, and add phosphate mineral flotation regulator and The collector is used to adjust the slurry, and the material after the slurry is added with water to reach a pulp mass concentration of 40%, and then enters the positive flotation system for positive flotation of phosphate minerals. The resulting foam product is positive flotation concentrate, and the product in the tank is positive flotation tailings; the phosphate mineral flotation regulator includes pH regulator sodium carbonate and positive flotation depressant water glass, the consumption of sodium carbonate is 1.5kg / t raw ore, and the consumption of water glass is 1.5kg / t raw ore; Described collector compri...

Embodiment 3

[0028] Embodiment 3, a kind of forward and reverse flotation method of low-grade siliceous calcareous collophosite, the method steps are as follows:

[0029] (1) Put a certain amount of crushed silicon-calcium colloidal phosphate ore in the flotation tank with water to adjust the slurry to a mass concentration of 70%, and add phosphate mineral flotation regulator and Slurry is adjusted by the collector. After the slurry is adjusted, the material is added with water until the mass concentration of the pulp is 30%, and then enters the positive flotation system for positive flotation of phosphate minerals. The foam product obtained is positive flotation concentrate, and the product in the tank is positive flotation. Tailings; the phosphate mineral flotation regulator includes pH regulator sodium carbonate and positive flotation depressant water glass, the consumption of sodium carbonate is 1kg / t raw ore, and the consumption of water glass is 1kg / t raw ore; Collectors include fatt...

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Abstract

The invention relates to a forward and reverse flotation method of low-grade siliceous-calcium collophosphine ore. In the method, phosphate minerals are added to the crushed siliceous-calcium collophosphine ore for flotation adjustment. Collectors and collectors for pulping, add water to dilute and then enter the positive flotation system for positive flotation of phosphate minerals; positive flotation concentrate desliming and desliming, enter the desiliconization reverse flotation stirring tank, the material after pulping Enter the reverse flotation desiliconization system for reverse flotation of siliceous gangue minerals; desiliconization and reverse flotation concentrates remove part of the water, and then grind the ore, add inhibitor sulfuric acid and magnesium collector fatty acid soap for slurry adjustment , carry out magnesium reverse flotation, and the product in the tank is the final phosphorus concentrate, which is concentrated, filtered and dried to obtain the finished phosphorus concentrate. The method of the present invention is more reasonable for the process design of processing low-grade siliceous-calcareous colloidal phosphate rock, and it can effectively improve the P of phosphorus concentrate. 2 o 5 Grade, reduce MgO content, that is to effectively improve the quality of phosphorus concentrate.

Description

technical field [0001] The invention relates to a collophosite beneficiation process, in particular to a forward and reverse flotation method suitable for low-grade siliceous-calcic collophosite. Background technique [0002] Sedimentary phosphorite ore (the phosphorus-containing mineral is collophoste) is the most important phosphate rock in the world's phosphate rock resources, accounting for more than 70% of the world's total phosphate rock reserves, of which the largest reserves and the most difficult to select are medium and low grades Especially for low-grade silicon-calcium colloidal phosphate ore, carbonate and silicate impurities must be excluded during the beneficiation process in order to meet the requirements of phosphate fertilizer processing. At present, most of the sorting of this type of ore at home and abroad adopts flotation method for enrichment. The commonly used flotation processes include: positive and negative flotation, reverse flotation, double rever...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00
Inventor 马晓青冯春晖朱孔金陈奕单连勇
Owner BLUESTAR LEHIGH ENG INST CO LTD
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