Method for producing calcium hydrogen phosphate fodder

A technology of calcium dihydrogen phosphate and its production method, which is applied in the field of calcium dihydrogen phosphate, can solve the problems of high production cost of thermal phosphoric acid, high cost of calcium dihydrogen phosphate, and high price, and improve equipment utilization rate and phosphorus content The effect of high and low equipment cost

Inactive Publication Date: 2007-06-20
SICHUAN UNIV
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  • Claims
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Problems solved by technology

First, because this process must use thermal phosphoric acid with a high concentration as a raw material for production, and the production cost of thermal phosphoric acid is high and expensive, so the cost of calcium dihydrogen phosphate produced by this process is correspondingly high, and the price also expensive

Method used

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  • Method for producing calcium hydrogen phosphate fodder
  • Method for producing calcium hydrogen phosphate fodder
  • Method for producing calcium hydrogen phosphate fodder

Examples

Experimental program
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Effect test

Embodiment 1

[0025] P produced from Jinhe Phosphate Mine in Sichuan 2 o 5 Content is about 18%, fluorine content is about 100 parts (weight) of wet-process phosphoric acid of 2.23%, as the sodium sulfate 2 parts (weight) of impurity remover, as the hydroxyethyl pyrophosphoric acid 0.02 parts (weight) of additive, add In the reaction tank equipped with a stirrer, the reaction temperature is kept at about 70° C., and the reaction is carried out for about 45 minutes under the condition of stirring. After the reaction, the feed liquid is added to the centrifugal filter for filtration, and the filter residue is removed. The filtrate enters the purification reactor equipped with an agitator again, and at the same time, limestone powder is added to carry out the purification reaction. The reaction temperature is about 45°C. Stir and add limestone powder to control the pH value of the reaction feed liquid at about 2.6, and react for about 50 minutes to precipitate impurities from phosphoric acid....

Embodiment 2

[0027] P produced from Kaiyang Phosphate Mine in Guizhou 2 o 5 100 parts of wet-process phosphoric acid with a content of about 20.9% and a fluorine content of about 1.74%, 2.2 parts of sodium sulfate as an impurity remover, and 0.015 parts of hydroxyethyl pyrophosphate as an additive are added to a reaction tank equipped with a stirrer. Reaction, the reaction temperature is about 70°C, stirring is carried out during the reaction, and the reaction time is about 45 minutes. The feed liquid is sent to a centrifugal filter for filtration to remove the filter residue, and the filtrate is clean phosphoric acid for the production of calcium dihydrogen phosphate. Send the purified phosphoric acid into a slurry reactor equipped with a stirrer, and at the same time add 15.6 parts (by weight) of limestone powder for slurry reaction. The reaction temperature is about 75°C. Stir during the reaction until the reaction reaches When the solid phase concentration in the slurry reaches about...

Embodiment 3

[0029] Phosphate produced from Yichang Phosphate Mine in Hubei 2 o 5 Content is about 15%, fluorine content is about 100 parts (weight) of wet-process phosphoric acid of 1.85%, calcium carbonate powder 2.1 parts (weight), add the reactor that is provided with stirrer, the pH value of feed liquid is controlled at about 2.8 . The reaction temperature is about 45°C, stirred during the reaction, and reacted for about 40 minutes. The feed liquid is sent to a centrifugal filter for filtration to remove filter residue, and the filtrate enters the lower purification reactor, and 1.1 parts (by weight) of limestone powder are added to make the feed liquid The pH value is controlled at about 3.1, the reaction temperature is kept at about 40°C, and stirring is carried out at the same time, and the reaction time is about 40 minutes. Send the feed liquid to a centrifugal filter for filtration, remove the filter residue, and the filtrate enters a slurry reactor equipped with an agitator, a...

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Abstract

The production method of primary calcium phosphate as animal feed mineral additive includes the following steps: using wet phosphoric acid as raw material, cleaning raw material, making reaction to obtain slurry, spraying said reacted slurry into hot air by means of nozzle, falling down in hot air and crystallizing, solidifying and drying so as to obtain the finished product.

Description

1. Technical field [0001] The invention relates to the production technology of animal feed mineral additives, in particular to a method for producing calcium dihydrogen phosphate used as animal feed mineral additives with phosphoric acid as the main raw material. 2. Background technology [0002] Feed additives are indispensable nutrients in animal feed, and they play a very important role in promoting the growth and development of animals. At present, there are two main types of animal feed mineral additives, one is calcium dihydrogen phosphate (CaHpHO 4 2H 2 O), the other is calcium hydrogen phosphate (Ca(HpHO 4 ) 2 h 2 O). As an animal feed additive, calcium hydrogen phosphate has a good effect on veterinary animals, but for poultry animals, especially aquatic animals, due to its poor water solubility, the effect on promoting the growth and development of animals is not obvious, while calcium dihydrogen phosphate is used as Animal feed mineral additives not only ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/32C01B25/234A23K1/175A23K20/26
Inventor 刘代俊钟本和张允湘
Owner SICHUAN UNIV
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