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Binder, binder-based ground phosphate rock pellet and preparation method thereof

A technology of binder and phosphate rock powder, which is applied in the direction of chemical instruments and methods, phosphorus compounds, phosphate material treatment, etc., can solve the problems of lower production cost, high phosphoric acid price, high powder return rate, etc., to achieve cost reduction, breathability Good performance and good molding rate

Inactive Publication Date: 2020-01-14
贾伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some yellow phosphorus production enterprises are trying to use phosphate rock powder plus clay or water glass as a binder and then pelletize and dry. The final briquette rolling machine is used as a ball forming machine to shape the aged crushed phosphate rock. This research is easy to operate, and the obtained balls have certain thermal stability and compressive strength. However, the price of phosphoric acid is high, which is not suitable for industrial production. It can't really reduce the production cost; there are also molding methods using organic composite binders, but there are also problems of low thermal strength, inconvenient operation, and high powder return rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A phosphate rock powder binding agent, the binding agent comprises the following components in weight percentage: CaO 24%, P 2 o 5 26%, SiO 2 30%, Al 2 o 3 20%.

[0028] A phosphate rock powder pellet based on the above-mentioned binder, the phosphate rock powder pellet includes the following raw materials in parts by weight: 5% binder, 80% phosphate rock powder, and 15% coke powder. The preparation method of described phosphate rock powder pellets comprises the following steps:

[0029] 1) Pretreat the phosphate rock powder to a moisture content of 5%, and grind the binder to 100 mesh;

[0030] 2) Add the binder and coke powder in the formula ratio to the phosphate rock powder, mix well, and keep stirring for 2 hours;

[0031] 3) The mixture powder is pressed into shape, and then sintered at a temperature of 300°C to obtain the finished phosphate rock powder pellets for electric furnaces.

[0032] The finished phosphate rock powder pellets obtained in this examp...

Embodiment 2

[0034] A phosphate rock powder binding agent, the binding agent comprises the following components by weight percentage: CaO 60%, P 2 o 5 25%, SiO 2 10%, Al 2 o 3 5%.

[0035] A phosphate rock powder pellet based on the above-mentioned binder, the phosphate rock powder pellet includes the following raw materials in parts by weight: 30% binder, 60% phosphate rock powder, and 10% coke powder. The preparation method of described phosphate rock powder pellets comprises the following steps:

[0036] 1) Pretreat the phosphate rock powder to a water content of 4%, and grind the binder to 200 mesh;

[0037] 2) Add the binder and coke powder in the formula ratio to the phosphate rock powder, mix well, and keep stirring for 3 hours;

[0038] 3) The mixture powder is pressed into shape, followed by sintering, the sintering temperature is ≥350°C, and the finished phosphate rock powder pellets for electric furnace can be obtained.

[0039] The finished phosphate rock powder pellets ...

Embodiment 3

[0041] A phosphate rock powder binder, the binder includes the following components in weight percentage: CaO50%, P 2 o 5 22%, SiO 2 15%, Al 2 o 3 12%, MnO 1%.

[0042] A phosphate rock powder pellet based on the above-mentioned binder, the phosphate rock powder pellet includes the following raw materials in parts by weight: 14% binder, 79% phosphate rock powder, and 7% coke powder. The preparation method of described phosphate rock powder pellets comprises the following steps:

[0043] 1) Pretreat the phosphate rock powder to a water content of 4%, and grind the binder to 120 mesh;

[0044] 2) Add the binder and coke powder in the formula ratio to the phosphate rock powder, mix well, and keep stirring for 8 hours;

[0045] 3) The mixture powder is pressed into shape, followed by sintering at a sintering temperature of 440°C to obtain the finished phosphate rock powder pellets for electric furnaces.

[0046] The finished phosphate rock powder pellets obtained in this ex...

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Abstract

The invention discloses a binder, a binder-based ground phosphate rock pellet and a preparation method thereof, wherein the binder comprises the following components by weight percentage: CaO 20-60%,P2O5 20-26%, SiO2 10-30%, Al2O3 5-20%. The invention has the advantages of simple process and convenient operation, adopts a specific binder to realize one-time molding of ground phosphate rock, has high strength, good molding rate and good thermal stability, does not completely pulverize at high temperature, and more importantly, basically does not reduce the grade of ground phosphate rock pellets. The ground phosphate rock pellet obtained by the invention has uniform particle size, ensures good air permeability of furnace charges, has high void ratio, and effectively improves the recovery rate of yellow phosphorus.

Description

technical field [0001] The invention belongs to the technical field of phosphate rock smelting, and in particular relates to a binder, a binder-based phosphate rock powder pellet and a preparation method. Background technique [0002] The production of industrial yellow phosphorus by the electric furnace method usually requires that the incoming materials (including phosphate rock) have a certain particle size range. The particle size of the furnace charge and the state of the charge at high temperature will directly affect the normal progress of the reaction in the electric furnace. Only the furnace materials that meet the requirements can make the yellow phosphorus produced have good quality and less sludge phosphorus. However, due to various reasons, it is difficult to use crushed phosphate rock or phosphate rock powder that does not meet the feed requirements in electric furnaces, resulting in a decrease in the utilization rate of phosphorus-containing production raw mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/01C01B25/027
CPCC01B25/01C01B25/027
Inventor 贾伟
Owner 贾伟
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