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Powdered monoammonium phosphate with 60% of total nutrient and production method

A technology of monoammonium phosphate and production method, applied in the direction of phosphate, phosphorus oxyacid, etc., can solve problems such as inability to meet different needs, and achieve the effect of high nutrient

Inactive Publication Date: 2015-07-22
HUBEI NEWYANGFENG FERTILIZER STOCK
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Problems solved by technology

[0002] At present, the known powdered monoammonium phosphate is generally produced from phosphate rock, sulfuric acid, liquid ammonia, etc., and its products generally contain 48% phosphorus pentoxide and 10% nitrogen. This formula cannot meet the needs of the market. different needs

Method used

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Embodiment Construction

[0014] Main raw material of the present invention is that main raw material is phosphate rock, sulfuric acid, liquefied ammonia, and its production process step is as follows:

[0015] A. Flotation pulp: Grind the above-mentioned phosphate rock into a phosphate pulp, and remove magnesium impurities in the pulp by adding a flotation agent and using a reverse flotation process, and at the same time increase the phosphorus content of the phosphate pulp.

[0016] B. Phosphoric acid extraction: Send the above flotation concentrate pulp into the phosphoric acid extraction tank, add sulfuric acid to react with it, and then extract 22% phosphoric acid.

[0017] C. Neutralization and concentration: The phosphoric acid and liquid ammonia are neutralized in the fast reactor, and the neutralization degree is controlled at about 1.04, and the specified density is reached after repeated concentration.

[0018] D. Atomization drying: Finally, the concentrated slurry is sent to the drying tow...

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Abstract

Disclosed are powdered monoammonium phosphate with 60% of total nutrient and a production method. The production method comprises the following steps: A, flotation of ore pulp, B, extraction of phosphoric acid, C, neutralization and concentration, and D, spray drying. In the step of neutralization and concentration, phosphoric acid and liquefied ammonia are subjected to a neutralization reaction in a fast reactor; a neutralization degree is controlled in 1.03-1.05; and the density of the product can reach 1.52-1.54 g / cm3 via repeating concentration. In the step of spray drying, the concentrated slurry is conveyed to a drying tower via a high-pressure pump and is subjected to counter-current atomization with hot wind to obtain qualified powdered monoammonium phosphate. The invention is advantaged in that powdered monoammonium phosphate with 60% of total nutrient can be produced; the content of phosphoric pentoxide can reach 49%; the nitrogen content can reach 11%; and the nutrient content is high.

Description

technical field [0001] The invention relates to the field of agricultural fertilizers, in particular to a powdery monoammonium phosphate with a total nutrient content of 60% and a production method. Background technique [0002] At present, the known powdered monoammonium phosphate is generally produced from phosphate rock, sulfuric acid, liquid ammonia, etc., and its products generally contain 48% phosphorus pentoxide and 10% nitrogen. This formula cannot meet the needs of the market. different needs. Contents of the invention [0003] The purpose of the present invention is exactly at present, and known powdery monoammonium phosphate is generally produced by phosphate rock, sulfuric acid, liquid ammonia etc. as raw material, and its product general phosphorus pentoxide all is more than 48%, and nitrogen content is all at 10% More than, this formula can't satisfy the different demands of market. [0004] The present invention utilizes the method for low-grade ore high-n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/28
Inventor 张宏志
Owner HUBEI NEWYANGFENG FERTILIZER STOCK
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