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Process application method of low-grade phosphorite in hot-process phosphorus chemical industry

A process application, low-grade technology, applied in the chemical industry, phosphate material processing, sustainable manufacturing/processing, etc., can solve the problem that low-grade phosphate rock cannot be used, and achieve good flotation effect, high content, and improved mineral processing. The effect of efficiency

Active Publication Date: 2020-11-03
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the defect that the low-grade phosphate rock in the prior art cannot be applied in the thermal phosphorus chemical industry, and constructs an application method of the low-grade phosphorus rock in the thermal phosphorus chemical industry by integrating mineralization

Method used

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  • Process application method of low-grade phosphorite in hot-process phosphorus chemical industry
  • Process application method of low-grade phosphorite in hot-process phosphorus chemical industry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Raw materials: 100kg of phosphate rock, of which P 2 o 5 content of 19.88%, MgO content of 1.25%, SiO 2 content of 36.87%, CaO content of 28.98%, Fe 2 o 3 The content is 1.75%, Al 2 o 3 The content is 2.32%, CO 2 The content is 3.88%, and the lump ore is ground to a particle size of less than 0.074mm by crushing and wet grinding, accounting for 80%.

[0049] Step 1: Add flotation agents in the flotation machine (pH regulator sodium carbonate 300g, collector TG 150g, inhibitor sodium silicate 400g, desiliconization main synergist LR 80g, desilication auxiliary synergist MR 30g ) for positive flotation to obtain flotation concentrate, where P 2 o 5 The content is 24.11%, SiO 2 content of 25.53%, CaO content of 38.26%, CO 2 The content is 4.25%, and the concentrate yield of positive flotation is about 71% (that is, 100kg raw ore gets 71kg concentrate);

[0050] Step 2: The flotation concentrate is obtained by pressure filtration with a water content of 8% and a ...

Embodiment 2

[0058] Raw materials: 100kg of phosphate rock, of which P 2 o 5 content of 19.88%, MgO content of 1.25%, SiO 2 content of 36.87%, CaO content of 28.98%, Fe 2 o 3 The content is 1.75%, Al 2 o 3 The content is 2.32%, CO 2 The content is 3.88%, and the lump ore is ground to a particle size of less than 0.074mm by crushing and wet grinding, accounting for 90%.

[0059] Step 1: add flotation agents (pH regulator 550g, collector 220g, inhibitor 495g, desiliconization main synergist 121g, desilication auxiliary synergist 33g) in the flotation machine to carry out positive flotation to obtain flotation Concentrate, where P 2 o 5 The content is 24.89%, SiO 2 content of 22.46%, CaO content of 39.87%, CO 2 The content is 4.12%, and the concentrate yield of positive flotation is about 67% (that is, 100kg raw ore gets 67kg concentrate);

[0060] Step 2: The flotation concentrate is obtained by pressure filtration with a water content of 8% and a quality of about 73kg;

[0061] ...

Embodiment 3

[0068] Raw materials: 100kg of phosphate rock, of which P 2 o 5 content of 19.88%, MgO content of 1.25%, SiO 2 content of 36.87%, CaO content of 28.98%, Fe 2 o 3 The content is 1.75%, Al 2 o 3 The content is 2.32%, CO 2 The content is 3.88%, and the lump ore is ground to a particle size of less than 0.074mm by crushing and wet grinding, accounting for 80%.

[0069] Step 1: add flotation agents (pH regulator 550g, collector 220g, inhibitor 495g, desiliconization main synergist 121g, desilication auxiliary synergist 33g) in the flotation machine to carry out positive flotation to obtain flotation Concentrate, where P 2 o 5 The content is 24.53%, SiO 2 content of 24.20%, CaO content of 38.93%, CO 2 The content is 4.32%, and the concentrate yield of positive flotation is about 69% (that is, 100kg raw ore gets 69kg concentrate);

[0070] Step 2: The flotation concentrate is obtained by pressure filtration with a water content of 8% and a quality of about 75kg;

[0071] ...

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Abstract

The invention discloses a process application method of low-grade phosphorite in hot phosphorus chemical industry, and belongs to the technical field of chemical industry production. According to themethod, the content of P2O5 in the low-grade phosphorite is increased to be higher than 24% from 19% through direct flotation operation; the content of P2O5 in the phosphorite is further increased tobe higher than 25% through the procedures of filter pressing, primary mixing, secondary mixing, sintering and crushing; the sintered lump ore, silica and coke are mixed in proportion and then subjected to a reduction reaction in a yellow phosphorus electric furnace, thus preparing yellow phosphorus. According to the method, the low-grade phosphate ore with the P2O5 content smaller than 20% can becomprehensively utilized through the ore dressing smelting chemical coupling process, the P2O5 content of the phosphate ore is increased to be higher than 25% through two times of enrichment of ore dressing and sintering; meanwhile, the energy consumption is reduced, the reduction efficiency is improved, and generation of hazardous waste substances such as phosphorus sludge is reduced through utilization of the sinter. In addition, by utilizing the low-grade phosphorite in a high-valued manner, the yellow phosphorus production efficiency is improved, the environmental risk of yellow phosphorusproduction is reduced, and the method has outstanding substantive features and remarkable progress.

Description

technical field [0001] The invention relates to a process method for comprehensive utilization of low-grade phosphate rock, in particular to a process application method of low-grade phosphate rock in thermal phosphorus chemical industry, which belongs to the technical field of chemical production. Background technique [0002] my country is rich in phosphate rock resources, but they are mainly medium and low-grade phosphate rocks. The processing costs of such minerals are high and the comprehensive utilization rate of resources is low. Therefore, it is an inevitable trend for the development of phosphorus chemical industry to strengthen the application technology development of medium and low-grade phosphate rocks. Judging from the current utilization of phosphate rock resources, most of them are carbonate-type phosphate rocks, because high-grade phosphate rocks have basically been mined, and middle and low-grade phosphate rocks need to be processed to enrich useful minerals...

Claims

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Application Information

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IPC IPC(8): C01B25/01
CPCC01B25/01Y02P20/10
Inventor 姚远侯翠红王好斌谷守玉李松杰
Owner ZHENGZHOU UNIV
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