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Production method for feed-grade monocalcium phosphate

A technology of calcium dihydrogen phosphate and a production method, applied in the field of phosphate, can solve the problems of unstable product quality, large land occupation for device construction, and high equipment investment, and achieve the effects of shortened production time, reduced production site area, and simple operation.

Inactive Publication Date: 2016-03-23
WENGFU (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] These processes all require sufficient curing time, the construction of the device must occupy a large area, the investment in equipment is high, and the product quality is unstable

Method used

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  • Production method for feed-grade monocalcium phosphate

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Embodiment

[0030] First the quality score (in P 2 o 5 40% to 50% of raw material phosphoric acid is defluorinated and dearsenized according to the conventional method, and it is used after meeting the process requirements; the raw material calcium carbonate with a mass fraction of more than 98% is mixed with water in the slurry tank to make mass Fraction is 50% calcium powder slurry, standby;

[0031] Send the phosphoric acid and calcium powder slurry that meets the process requirements into the primary reaction tank for neutralization reaction. The temperature is controlled at 40°C to 60°C. Most of the phosphoric acid and calcium powder react to become calcium dihydrogen phosphate, and the slurry is stirred evenly. The slurry is pumped out and sent to the secondary reaction tank; the slurry continues to undergo neutralization reaction in the secondary reaction tank, and the temperature is controlled at 75 ° C ~ 95 ° C, so that most of the phosphoric acid and calcium powder react to bec...

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Abstract

The invention discloses a production method for feed-grade monocalcium phosphate. The method comprises the following steps: (1) preparation of a phosphoric acid raw material; (2) slurrying of a calcium carbonate raw material; (3) first order reaction; (4) second order reaction; (5) spray drying and cylinder drying of slurry; (6) crushing and screening; (7) cooling and packaging to obtain the product. Compared with the existing technology, the production method disclosed by the invention has the following advantages: (1) a curing procedure in an original process is omitted, and the production time is greatly shortened; (2) the area of a used production site is greatly reduced, and the construction investment is saved; (3) the process is easy to control and simple to operate; (4) the product accords with a quality requirement of a feed product. The production method is applicable to producing the feed-grade monocalcium phosphate product.

Description

technical field [0001] The present invention relates to phosphate, especially relates to calcium phosphate, furthermore relates to feed grade calcium dihydrogen phosphate, also relates to its production method. Background technique [0002] The main varieties of feed grade calcium phosphate salts are tricalcium phosphate, calcium hydrogen phosphate, and calcium dihydrogen phosphate, all of which are nutritional additives of mineral elements. Among them, calcium dihydrogen phosphate (MCP) is an excellent high-efficiency phosphate feed additive with high phosphorus content and high water solubility, and is widely used as a feed additive for aquaculture animals and livestock and poultry animals. Due to the high water-soluble phosphorus content of calcium dihydrogen phosphate, which accounts for more than 90wt% of total phosphorus, it is beneficial to the absorption of calcium and phosphorus by aquatic animals. The digestion and absorption rate is above 90%, and the excretion is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/32
CPCC01B25/32
Inventor 周智武李红林赵建勇田仁道尹健崔艳
Owner WENGFU (GRP) CO LTD
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