Thermal mud phosphorus type phosphate rock powder binder

A phosphate rock powder and binder technology, applied in the field of phosphate rock powder binder, can solve the problems of difficulty in controlling the chemical composition of finished products and waste, many raw materials added, lengthy production process, etc.

Active Publication Date: 2017-05-17
YUNNAN TIANAN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN 102381690 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 mixed, matured, dried and ball-milled into powder The phosphate rock powder oxygen-enriched binder produced has many defects such as the addition of many raw materials, the lengthy and cumbersome production process, and the 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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  • Thermal mud phosphorus type phosphate rock powder binder

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Effect test

Embodiment 1

[0012] A phosphate rock powder binder, adding phosphorus-containing waste water produced in the production process of thermal yellow phosphorus into the acid mud mixing tank, the addition amount is 50% of the tank volume, starting the agitator, and then filtering the phosphoric acid produced from thermal mud phosphorus The percentage of free phosphoric acid produced is 25%, P 2 o 5 Slowly add paste-like acid mud with a percentage content of 31%, stir evenly and mix to form a suspension with a solid phase of 70% and a liquid phase of 30%, making a solid content of 70%, P 2 o 5 The percentage content is 28% phosphate rock powder binder.

[0013] After the binder and the phosphate rock powder are stirred and mixed in proportion, the phosphate rock powder is used in a briquette drying process or a granulation and roasting process to produce phosphate rock pellets. P in phosphate rock pellets 2 o 5 content increased by 5%.

Embodiment 2

[0015] A phosphate rock powder binder, adding phosphorus-containing waste water produced in the production process of thermal yellow phosphorus into the acid mud mixing tank, the addition amount is 50% of the tank volume, starting the agitator, and then filtering the phosphoric acid produced from thermal mud phosphorus The percentage of free phosphoric acid produced is 28%, P 2 o 5 Slowly add paste-like acid mud with a percentage content of 33%, stir evenly and mix to form a suspension with a solid phase of 75% and a liquid phase of 25%, making a solid content of 75%, P 2 o 5 The percentage content is 30% phosphate rock powder binder.

[0016] After the binder and the phosphate rock powder are stirred and mixed in proportion, the phosphate rock powder is used in a briquette drying process or a granulation and roasting process to produce phosphate rock pellets. P in phosphate rock pellets 2 o 5 content increased by 6%.

Embodiment 3

[0018] A phosphate rock powder binder, adding phosphorus-containing waste water produced in the production process of thermal yellow phosphorus into the acid mud mixing tank, the addition amount is 50% of the tank volume, starting the agitator, and then filtering the phosphoric acid produced from thermal mud phosphorus The percentage of free phosphoric acid produced is 30%, P 2 o 5 Slowly add paste-like acid mud with a percentage content of 35%, stir evenly and mix to form a suspension with 80% solid phase and 20% liquid phase, and make a solid content of 80%, P 2 o 5 The percentage content is 32% phosphate rock powder binder.

[0019] After the binder and the phosphate rock powder are stirred and mixed in proportion, the phosphate rock powder is used in a briquette drying process or a granulation and roasting process to produce phosphate rock pellets. P in phosphate rock pellets 2 o 5 content increased by 8%.

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Abstract

A thermal-process phosphorous sludge type ground phosphate rock binder is characterized in that phosphorus-containing wastewater produced in a thermal-process yellow phosphorus production process is added to an acid sludge stirring tank, pasty acid sludge which contains 25%-30% of free phosphoric acid and 30%-35% of P2O5 and is produced through filtration during thermal-process phosphoric acid preparation from phosphorous sludge is slowly added, uniformly stirred and mixed, a suspension is formed, and the ground phosphate rock binder containing 70%-80% of solid matters and 28%-32% of P2O5 is prepared; the binder and ground phosphate rock after proportional stirring and mixing are subjected to ground phosphate rock press ball forming and drying or a pelleting and roasting process, and phosphorite pellets are produced. Intermediate products of a production process are sufficiently utilized as auxiliary materials and directly reused in the production process, the content of P2O5 in the phosphorite pellets is increased by 5%-8%, so that the Ca-Si ratio (namely, acidity coefficient Mk) of the ground phosphate rock is not increased, and the ground phosphate rock binder is suitable for most ground phosphate rock; efficient recycling and comprehensive utilization of the phosphate rock resource are realized.

Description

technical field [0001] The invention relates to a phosphate rock powder binder. [0002] technical background [0003] 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/01
Inventor 吴祥杜建学
Owner YUNNAN TIANAN CHEM CO LTD
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