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Production process for preparing feed-grade calcium hydrophosphate from low-grade phosphorite

A calcium hydrogen phosphate and production process technology, which is applied in the production process field of preparing feed grade calcium hydrogen phosphate, can solve the problems of high water content of phosphogypsum, sulfuric acid consumption, extraction rate, and low washing rate, so as to achieve excellent product quality and improve washing The effect of simple process steps and high efficiency

Active Publication Date: 2022-01-28
KUNMING YUNPANSHAN PHOSPHORUS CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the production of feed-grade calcium hydrogen phosphate from phosphate rock with high impurity content and phosphorus content lower than 22%, difficulties such as low extraction rate and washing rate, sulfuric acid consumption, and high moisture content of phosphogypsum generally occur.

Method used

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  • Production process for preparing feed-grade calcium hydrophosphate from low-grade phosphorite
  • Production process for preparing feed-grade calcium hydrophosphate from low-grade phosphorite
  • Production process for preparing feed-grade calcium hydrophosphate from low-grade phosphorite

Examples

Experimental program
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Effect test

Embodiment 1

[0039] 1) Washing with water, the low-grade phosphate rock in the silo is transported to the crusher through the feeder for primary crushing, the primary crushed mineral material is subjected to secondary crushing, and the secondary crushed fine mineral material is sent to the ore washing machine for mixing with water Washing, after washing, send it to the vibrating screen to screen out the coarse ore particles and send them to the phosphate rock storage yard. After sieving, the ore pulp will pass through the primary sand separator, the secondary sand separator and the third sand separator in sequence, and the separated ore particles will be separated. It is sent to the phosphate rock storage yard, and the generated mud is sent to the muddy water transfer tank and then settled by a thickener. After the settlement, the settled mud enters the filter press process for press filtration, and the sludge after the press filter is transferred to the slag yard for separation. out water ...

Embodiment 2

[0049] 1) Washing with water, the low-grade phosphate rock in the silo is transported to the crusher through the feeder for primary crushing, the primary crushed mineral material is subjected to secondary crushing, and the secondary crushed fine mineral material is sent to the ore washing machine for mixing with water Washing, after washing, send it to the vibrating screen to screen out the coarse ore particles and send them to the phosphate rock storage yard. After sieving, the ore pulp will pass through the primary sand separator, the secondary sand separator and the third sand separator in sequence, and the separated ore particles will be separated. It is sent to the phosphate rock storage yard, and the generated mud is sent to the muddy water transfer tank and then settled by a thickener. After the settlement, the settled mud enters the filter press process for press filtration, and the sludge after the press filter is transferred to the slag yard for separation. out water ...

Embodiment 3

[0060] 1) Washing with water, the low-grade phosphate rock in the silo is transported to the crusher through the feeder for primary crushing, the primary crushed mineral material is subjected to secondary crushing, and the secondary crushed fine mineral material is sent to the ore washing machine for mixing with water Washing, after washing, send it to the vibrating screen to screen out the coarse ore particles and send them to the phosphate rock storage yard. After sieving, the ore pulp will pass through the primary sand separator, the secondary sand separator and the third sand separator in sequence, and the separated ore particles will be separated. It is sent to the phosphate rock storage yard, and the generated mud is sent to the muddy water transfer tank and then settled by a thickener. After the settlement, the settled mud enters the filter press process for press filtration, and the sludge after the press filter is transferred to the slag yard for separation. out water ...

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Abstract

The invention discloses a production process for preparing feed-grade calcium hydrophosphate from low-grade phosphorite, wherein the production process comprises the following steps: 1) washing with water, and recycling separated water; 2) separating; 3) carrying out flotation; and 4) preparation of feed grade calcium hydrogen phosphate. according to the method, aiming at the low-grade phosphorite, the extraction rate is effectively increased, the washing rate is increased, the consumption of sulfuric acid is reduced, the difficulty that the water content of phosphogypsum is high is solved, and according to the impurity content of the phosphorite and the production requirement condition, the low-grade phosphorite is subjected to phosphorite impurity removal and grading, so that different requirements are met; and in addition, the process steps are simple, and the produced feed-grade calcium hydrophosphate product is excellent in quality.

Description

technical field [0001] The invention relates to the technical field of calcium hydrogen phosphate production, in particular to a production process for preparing feed-grade calcium hydrogen phosphate by using low-grade phosphate rock. Background technique [0002] Due to the continuous expansion of the scale of phosphorus chemical products of various enterprises and the market demand, high-quality phosphate rock resources are gradually decreasing. The development and utilization of low-grade phosphate rock has outstanding economic and social benefits for enterprises. For the production of feed-grade calcium hydrogen phosphate from phosphate rock with high impurity content and phosphorus content lower than 22%, difficulties such as low extraction rate and washing rate, sulfuric acid consumption, and high moisture content of phosphogypsum generally occur. [0003] Feed grade calcium hydrogen phosphate products are mainly used to provide phosphorus, calcium and other mineral n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/32
CPCC01B25/325C01B25/327C01P2006/80
Inventor 左军李天柱
Owner KUNMING YUNPANSHAN PHOSPHORUS CHEM CO LTD