Method for using sulfates as ammonium phosphate anticaking agent

An anti-caking agent and sulfate technology, which is applied in the field of ammonium phosphate and phosphate fertilizer, can solve the problems of caking of ammonium phosphate fertilizers, and achieve the effect of improving slurry viscosity and anti-caking

Active Publication Date: 2013-05-22
WENGFU (GRP) CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method of using sulfate as an anti-caking agent for ammonium phosphate to solve the caking problem of ammonium phosphate fertilizers, and simultaneously solve the problem of sulfates such as aluminum sulfate, ferrous sulfate, and ferric sulfate produced by smelting enterprises. to prevent them from polluting the environment

Method used

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  • Method for using sulfates as ammonium phosphate anticaking agent
  • Method for using sulfates as ammonium phosphate anticaking agent
  • Method for using sulfates as ammonium phosphate anticaking agent

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Embodiment

[0013] The invention has been applied in the Wengfu Phosphate Fertilizer Plant of Wengfu (Group) Co., Ltd., and is used in a 400,000-ton / year monoammonium phosphate plant with good effect.

[0014] The data analyzed on February 20, 2010 are as follows:

[0015]

[0016] The specific method is: first add the sulfate of iron and aluminum ions to the raw material for ammonium phosphate production--the dilute phosphoric acid storage tank with a mass fraction of 21% to 30% at a ratio of 0.2% to 3%, and the addition amount is controlled at 2 ~5t / h, the amount of phosphoric acid is 25~50m 3 / h to improve the viscosity of the slurry; stir continuously with a stirrer in the storage tank, mix evenly and transport it to the neutralization reactor with a pump, the reaction between phosphoric acid and ammonia is completed within a few seconds in the reactor, and finally use conventional technology Concentrate and dry the neutralized slurry to produce a qualified monoammonium phosphate ...

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Abstract

The invention discloses a method for using sulfates as an ammonium phosphate anticaking agent. Sulfates of iron ions and aluminum ions are used as the ammonium phosphate anticaking agent. The method comprises the following specific steps of: firstly, metering the sulfates of iron ions and aluminum ions, adding into a storage tank of dilute phosphoric acid as a production raw material for producing ammonium phosphate to improve the viscosity of slurry, agitating in the storage tank by using an agitator, and uniformly mixing; then, delivering to a neutralizing reactor by using a delivery pump, and leading phosphoric acid to react with ammonia in the reactor; and finally, concentrating and drying the neutralized slurry by using the conventional technology to obtain a basically noncaked monoammonium phosphate product. The method has the advantages that: (1) the sulfates of iron ions and aluminum ions are added into phosphoric acid to improve the viscosity of slurry and improve the anticaking property of an ammonium phosphate product; (2) the sulfates of iron ions and aluminum ions basically have no precipitation in acid; and (3) the sulfates of iron ions and aluminum ions are easy to dissolve in phosphoric acid and basically have no influence on the blockage degree of an ammonium phosphate concentrating and heating device and the procedures of drying and the like. The method is applicable to ammonium phosphate production enterprises.

Description

【Technical field】 [0001] The invention relates to phosphate fertilizers, in particular to ammonium phosphate, and in particular to a method for preventing caking of ammonium phosphate fertilizers by using sulfates of iron and aluminum ions. 【Background technique】 [0002] Ammonium phosphate is one of the main fertilizers in modern agriculture and forestry. Ammonium phosphate usually refers to monoammonium phosphate and diammonium phosphate, referred to as ammonium phosphate. The physical properties of ammonium phosphate produced by different raw materials are quite different: some phosphate rocks can produce high-nutrient ammonium phosphate, and some can only produce low-nutrient ammonium phosphate; some phosphate rocks produce ammonium phosphate products with little caking, The degree of agglomeration of ammonium phosphate produced from some phosphate rocks is more serious. The ammonium phosphate agglomeration is extremely inconvenient to apply. At present, some manufactu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00
Inventor 黄进金先煜张晓迁张瑞饶轶晟陈清宪胡曾毅陶志曾斌游光刚
Owner WENGFU (GRP) CO LTD
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