Liquid-solid phase adjustment type ground phosphate rock binder

A phosphate rock powder, liquid-solid phase technology, applied in the field of phosphate rock powder binder, can solve the problems of adding too many raw materials, cumbersome, lengthy production process, etc.

Inactive Publication Date: 2016-01-06
YUNNAN TIANAN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN102381690 discloses a medicine made of rare earth elements, sodium chloride, calcium chloride, zinc chloride, sodium carbonate and potassium carbonate in proportion to montmorillonite powder, which is prepared after mixing, aging, drying and ball milling into powder. The phosphate rock powder oxygen-enriched binder has the disadvantages of adding many raw materials, lengthy and cumbersome production process, difficulty in controlling the chemical composition of the finished product and waste after high temperature reaction, and additional follow-up treatment.

Method used

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  • Liquid-solid phase adjustment type ground phosphate rock binder

Examples

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Comparison scheme
Effect test

Embodiment 1

[0011] A kind of phosphate rock powder binding agent, the solid matter content that produces after concentrating in dihydrate process wet-process phosphoric acid production is 10%, P 2 o 5 The acid slag with a percentage content of 45% is stored in the acid slag tank, and is pumped into the liquid-solid phase regulator with an acid slag pump to make a solid content of 30%, P 2 o 5 The percentage content is 35% phosphate rock powder binder. After the binder and the phosphate rock powder are stirred and mixed in proportion, the phosphate rock pellets are produced through the processes of briquette forming, drying or granulation and roasting. P in phosphate rock pellets 2 o 5 content increased by 10%.

Embodiment 2

[0013] A kind of phosphate rock powder binding agent, the solid matter content that produces after concentrating in dihydrate process wet-process phosphoric acid production is 15%, P 2 o 5 The acid slag with a percentage content of 43% is stored in the acid slag tank, and is pumped into the liquid-solid phase regulator with an acid slag pump to make a solid content of 40%, P 2 o 5 The percentage content is 33% phosphate rock powder binder. After the binder and the phosphate rock powder are stirred and mixed in proportion, the phosphate rock pellets are produced through the processes of briquette forming, drying or granulation and roasting. P in phosphate rock pellets 2 o 5 content increased by 9%.

Embodiment 3

[0015] A kind of phosphate rock powder binding agent, the solid matter content that produces after concentrating in dihydrate process wet-process phosphoric acid production is 20%, P 2 o 5 The acid slag with a percentage content of 40% is stored in the acid slag tank, and is pumped into the liquid-solid phase regulator with an acid slag pump to make a solid content of 50%, P 2 o 5 The percentage content is 30% phosphate rock powder binder. After the binder and the phosphate rock powder are stirred and mixed in proportion, the phosphate rock pellets are produced through the processes of briquette forming, drying or granulation and roasting. P in phosphate rock pellets 2 o 5 content increased by 8%.

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Abstract

The invention discloses a liquid-solid phase adjustment type ground phosphate rock binder. Acid sludge generated by concentration in dihydrate wet-process phosphoric acid production is stored in an acid sludge tank, wherein the solid content of the acid sludge is 10-20%, and the P2O5 content of the acid sludge is 40-47%; the acid sludge is pumped into a liquid-solid phase adjuster through an acid sludge pump, and then the ground phosphate rock binder is formed, wherein the solid content of the ground phosphate rock binder is 30-50%, and the P2O5 content of the ground phosphate rock binder is 30-35%. The binder and ground phosphate rock are mixed and stirred according to a proportion and then subjected to briquetting forming and baking or drying, and phosphate rock pellets are produced. The intermediate product generated in a production process is fully utilized and directly reused in the production process as an auxiliary material, the P2O5 content in the phosphate rock pellets is increased by 8-10%, and the silicon-calcium ratio (acidity coefficient Mk) of the phosphate rock pellets is not increased. Efficient circulation and comprehensive utilization of phosphate rock resources are achieved.

Description

technical field [0001] The invention relates to a phosphate rock powder binder. technical background [0002] Phosphate rock is mined, transported, and put into the furnace after crushing, drying, screening and other processing in the factory. The amount of lump ore is only about 50%. If the qualified lump ore is purchased to make phosphorus, it usually loses 15%. ~20%, the remaining phosphate rock powder screened by yellow phosphorus production enterprises is huge, and if it is not used, it will cause great waste of phosphorus resources and serious economic losses. The "Yellow Phosphorus Industry Access Conditions" implemented by the state clearly requires that the mineral powder utilization rate of yellow phosphorus enterprises must reach 100%. Some yellow phosphorus production enterprises try to use phosphate rock powder plus clay or water glass as a binder and then pelletize and dry in order to achieve the purpose of comprehensively utilizing valuable phosphate rock res...

Claims

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Application Information

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IPC IPC(8): C01B25/01
Inventor 杜建学吴祥黄天江
Owner YUNNAN TIANAN CHEM CO LTD
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