Production method of fodder calcium phosphate salt

The technology of a calcium phosphate salt and a production method is applied in the production field of feed calcium phosphate salt, which can solve the problems of incomplete reaction, single product type and high cost, and achieve easy control of the production process, wide process adaptability and low production cost. Effect

Inactive Publication Date: 2012-10-10
王邵东 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method reacts incompletely, and product quality is unstable, and the high content of powdery product is unfavorable for adding during feed processing; The 2nd, reacts generation calcium dihydrogen phosphate with phosphoric acid and calcium hydrogen phosphate, and this method product quality is good but this method cost height, Calcium hydrogen phosphate cannot be produced, and the product category is single
[0003] Chinese Patent Publication No. CN1239706, on December 29, 1999, disclosed a "method for the production of calcium orthophosphate by one-step method of fluidized phosphoric acid spraying", although it partially solved the problems existing in the above-mentioned method, but due to no consideration of feed The characteristics of high-grade calcium phosphate slurry and the unqualified product water after spraying cannot guarantee the stability of the product, so it cannot be adapted to industrial production

Method used

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  • Production method of fodder calcium phosphate salt

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Experimental program
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Effect test

Embodiment 1

[0017] Take the annual output of 50,000 tons of calcium dihydrogen phosphate as an example:

[0018] Limestone (CaCO 3 Content is 98%) 200 mesh powder enters re-sizing tank 1, and adds water in re-sizing tank 1, controls the slurry solid content of re-sizing tank 1 to be about 65%, is heated to make the slurry temperature be 105 ℃, then use The pump transports the slurry to the continuous reaction tank 3 with a stirring device at a flow rate of 4.708 tons per hour; the purified phosphoric acid with a concentration of 32% first enters the acid heater 2 to raise the temperature to 105 ° C, and the flow rate is 10.994 tons per hour. The flow enters the continuous reaction tank 3 to react with the slurry, and the reaction time is 60 minutes; the reacted slurry enters the slurry tank 4, and then adds the above-mentioned purified phosphoric acid to the slurry tank 4 for further reaction at a flow rate of 7.328 tons per hour , the reaction temperature is controlled at 105 DEG C, and...

Embodiment 2

[0020] Take the annual output of 30,000 tons of calcium dihydrogen phosphate as an example:

[0021] Limestone (CaCO3 content is 99%) 400-mesh powder from the raw material warehouse enters the re-sizing tank 1, and water is added in the re-sizing tank 1, and the solid content of the slurry in the re-sizing tank 1 is controlled to be about 70%, and heating makes the slurry The temperature is 90°C, and then pump the slurry to the continuous reaction tank 3 with a stirring device at a flow rate of 2.596 tons per hour; the purified phosphoric acid with a concentration of 54% first enters the acid heater 2 to raise the temperature to 90°C , enter the continuous reaction tank 3 with a flow rate of 3.909 tons per hour to react with the slurry, and the reaction time is 20 minutes; the reacted slurry enters the slurry tank 4, and goes to the slurry tank 4 with a flow rate of 2.606 tons per hour Then add the above-mentioned purified phosphoric acid for further reaction, the reaction tem...

Embodiment 3

[0023] Take the annual output of 30,000 tons of calcium hydrogen phosphate as an example:

[0024] Limestone (CaCO3 content is 98.5%) 350-mesh powder from the raw material warehouse enters the re-sizing tank 1, and water is added to the re-sizing tank 1, and the solid content of the slurry in the re-sizing tank 1 is controlled to be about 68%, and heating makes the slurry The temperature is 100°C, and then pump the slurry to the continuous reaction tank 3 with a stirring device at a flow rate of 4.576 tons per hour; the purified phosphoric acid with a concentration of 46% first enters the acid heater 2 to raise the temperature to 100°C , enter the continuous reaction tank 3 with a flow rate of 3.917 tons per hour to react with the slurry, and the reaction time is 40 minutes; the reacted slurry enters the slurry tank 4, and goes to the slurry tank 4 with a flow rate of 2.611 tons per hour Add the above-mentioned purified phosphoric acid for further reaction, the reaction temper...

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Abstract

The invention discloses a production method of fodder calcium phosphate salt. The method comprises the following steps: selecting H3PO4 and CaCO3 in a mol ratio of (1-2):(1-1.01) by a wet method; firstly, carrying out a reaction of 60 percent of H3PO4 and the CaCO3 for 20-60 minutes; then, adding the remained 40 percent of H3PO4; continuing the reaction for 20-40 minutes while controlling the reaction temperature at 90-105 DEG C; after the reaction, enabling slurry to enter a drying tower, spout in drops from a nozzle at the upper part of the drying tower and enter in hot air at 120-160 DEG C; enabling the slurry in a falling process to form an acinous semi-finished product; and drying and cooling the semi-finished product by a cylinder dryer to obtain a finished product. The production method produces a plurality of species of products and has low production cost and product moisture, easily controlled and industrialized production process, stable product quality and uniform acinous appearance.

Description

technical field [0001] The invention relates to the technical field of feed mineral additives, in particular to a production method of feed calcium phosphate. Background technique [0002] Calcium phosphate as a feed mineral additive mainly has the following production methods: reacting calcium carbonate with phosphoric acid or reacting phosphoric acid with calcium hydrogen phosphate to produce calcium dihydrogen phosphate, but these two methods have high production costs and the product The yield is small, the reaction between phosphoric acid and calcium carbonate is incomplete, and the powdery content of the product is high. At present, there are two kinds that are more commonly used. One is to use limestone powder to react with high-concentration phosphoric acid to generate solid calcium dihydrogen phosphate, which is then pulverized to obtain the product calcium dihydrogen phosphate. This method reacts incompletely, and product quality is unstable, and the high content ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23K1/175A23K20/26
Inventor 王邵东黄少雄肖洪
Owner 王邵东
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