Method for producing powdered rock phosphate balls by using powdered rock phosphate

A technology of phosphate rock powder and phosphoric acid, which is applied in chemical instruments and methods, phosphorus compounds, phosphate material treatment, etc., can solve the problems of partial consumption of yellow phosphorus tail gas, high dust content in the granulation site, and increased phosphorus, so as to reduce production cost, increase utilization value, and reduce cost

Pending Publication Date: 2020-10-30
重庆雁川化工科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) Disadvantages of clay as a binder: ① It reduces the grade of phosphate rock, such as raw ore P 2 o 5 The mass fraction is 25%, and after adding 8% clay to make the ball, the P in the dry ball 2 o 5 The mass fraction drops to 23%; ②The amount of slag increases to produce yellow phosphorus, which is put into the furnace phosphorus ore. 2 o 5 If the mass fraction is 25%, if sintered balls with clay are used instead, the raw material quality of phosphate rock will increase from the original 1t to 1.3-1.5t, and the clay in the sintered balls will eventually be discharged in the form of slag, and the slag quality will increase from the original 1t to 1.9-2.0t; ③The economic benefit is reduced, and the power consumption is calculated by the amount of chemical materials. The heat loss from the clay (slag) is converted into power consumption of about 10

Method used

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  • Method for producing powdered rock phosphate balls by using powdered rock phosphate
  • Method for producing powdered rock phosphate balls by using powdered rock phosphate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A second-generation method for producing phosphate rock powder balls by using phosphate rock powder, comprising the steps of:

[0050] (1) Screening: The phosphate rock powder screened by the production enterprise or the remaining mineral powder produced in the mine concentrate is screened with a 2-mesh screen. The massive mineral material is directly used for the production of yellow phosphorus. The screened powder The material then enters the batching step;

[0051] (2) Batching: according to 100 parts of phosphate rock powder, 2 parts of phosphoric acid, 0.5 part of calcium carbonate; 0.5 part of sulfuric acid and 0.5 part of phosphate binder carry out batching, then drop into agitator and stir evenly, the mass percentage concentration of phosphoric acid is 10%, the phosphate binder is magnesium phosphate;

[0052] (3) Mixing: The evenly stirred mixture is transported into the double-roller mixer for full mixing, so that the CO in the mixture 2 freed;

[0053] (4)...

Embodiment 2

[0059] A second-generation method for producing phosphate rock powder balls by using phosphate rock powder, comprising the steps of:

[0060] (1) Screening: use 10-mesh sieve to screen the phosphate rock powder screened by the production enterprise or the remaining mineral powder produced in the mine. The material then enters the batching step;

[0061] (2) Batching: according to 100 parts of phosphate rock powder, 4 parts of phosphoric acid, 1 part of calcium carbonate; 3 parts of sulfuric acid and 1 part of phosphate binder carry out batching, then put into the stirrer and stir evenly, the mass percentage concentration of phosphoric acid is 30%, phosphate binders are magnesium phosphate and calcium phosphate;

[0062] (3) Mixing: The evenly stirred mixture is transported into the double-roller mixer for full mixing, so that the CO in the mixture 2 freed;

[0063] (4) Ball briquetting: send the uniformly mixed powder into the briquetting machine to briquette under a pressu...

Embodiment 3

[0069] A second-generation method for producing phosphate rock powder balls by using phosphate rock powder, comprising the steps of:

[0070] (1) Screening: The phosphate rock powder screened by the production enterprise or the remaining mineral powder produced by the mine on the mine is screened with a 15-mesh screen. The massive mineral material is directly used for yellow phosphorus production. The screened powder The material then enters the batching step;

[0071] (2) Ingredients: 100 parts of phosphate rock powder, 3 parts of phosphoric acid, 0.8 parts of calcium carbonate, 5 parts of sulfuric acid and 2 parts of phosphate binder are used for batching, then put into the mixer and stir evenly, the mass percentage concentration of phosphoric acid is 50 %, the phosphate binder is magnesium phosphate and aluminum phosphate;

[0072] (3) Mixing: The evenly stirred mixture is transported into the double-roller mixer for full mixing, so that the CO in the mixture 2 freed;

...

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Abstract

The invention provides a method for producing powdered rock phosphate balls from powdered rock phosphate. The method comprises the following steps: mixing 100 parts by mass of powdered rock phosphate,1-4 parts by mass of phosphoric acid and 0.5-1 part by mass of calcium carbonate, mixing 0.5-3 parts by mass of sulfuric acid and 0.5-2 parts by mass of a phosphate adhesive, pressing into balls, drying and cooling to obtain powdered rock phosphate balls. According to the method, phosphoric acid, sulfuric acid and a phosphate adhesive are adopted, and P2O5 in the phosphoric acid, sulfuric acid and the phosphate adhesive finally enters the furnace to participate in phosphorus production reaction, so that the content of P2O5 in the phosphate ore is increased, and the grade of the phosphate oreis improved, meanwhile, sulfuric acid is added to further reduce the cost, and reacts with calcium carbonate and other substances to enhance the strength of the final product. The added phosphoric acid and carbonate impurities in phosphorite are subjected to a chemical replacement reaction, a double-roller mixer is used for mixing, CO2 and organic matter harmful to electric furnace production arefully released, the added phosphoric acid is waste phosphoric acid generated in the yellow phosphorus production process, and the utilization value of the waste phosphoric acid is increased.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a method for producing phosphate rock powder balls from phosphate rock powder. Background technique [0002] In order to reduce the production cost of yellow phosphorus, the phosphate rock raw materials used by yellow phosphorus manufacturers are mainly rich ore (P 2 o 5 Quality score > 28%). After several years of excessive and indiscriminate mining, there are not many rich ore left, and the resources are seriously damaged. Most yellow phosphorus production enterprises in China only use lump ore, and they cannot use medium and low-grade phosphate rock powder that can meet the requirements for furnace feeding because there is no pellet (block) sintering device and technology. Most of the enterprises with mineral resources and relying on mining and marketing mine blocks and discard powder, which is a serious waste of resources. In the past when raw materials were...

Claims

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Application Information

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IPC IPC(8): C01B25/01C01B25/027
CPCC01B25/01C01B25/027
Inventor 张国强张弘强张杰
Owner 重庆雁川化工科技有限公司
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