Compound fertilizer and production process thereof

Abstract

The invention provides a compound fertilizer and a production process thereof. The compound fertilizer comprises the following raw materials by weight: 20-45 parts of urea, 25-55 parts of calcium superphosphate, 10-45 parts of calcium magnesium phosphate, 5-30 parts of potassium sulfate and 0.5-5 parts of potassium chloride. The production process includes: 1) weighing crushing, i.e. weighing theraw materials urea, calcium superphosphate, calcium magnesium phosphate, potassium sulfate and potassium chloride according to the weight parts and conducting grinding and crushing; 2) mixing, i.e. mixing the weighed and crushed raw materials; 3) raw material granulation, i.e. sending the evenly stirred raw materials into a granulator for granulation; 4) particle grading, i.e. screening and separating the particles according to the outer diameter size, separating the unqualified particles and performing crushing and granulation again; and 5) finished product packaging. The invention adopts thetechnology of mixing calcium superphosphate with calcium magnesium phosphate to overcome the defect that compound fertilizers deliquesce easily in the prior art, the hydrolysis time urea can be prolonged, the fertilizer efficiency can be improved, also the production technology has simple process, is low in making cost and has high production efficiency, thus being widely suitable for supportingcompound fertilizer production.

Description

technical field [0001] The invention relates to a fertilizer and a production process thereof, in particular to a compound fertilizer and a production process thereof. Background technique [0002] Compound fertilizer is a general term for compound fertilizers and mixed fertilizers. It contains two or more of the three nutrients nitrogen, phosphorus, and potassium. It is made through chemical combination (chemical) action or mixed ammoniation granulation process. The production of compound fertilizers can be used to materialize fertilization technology, improve fertilizer efficiency, reduce the frequency of fertilization, and save the cost of fertilization. Therefore, the production and application of compound fertilizers has attracted widespread attention from all over the world; at the same time, compound fertilizers are also the development direction of the world's chemical fertilizer industry. The world's consumption of compound fertilizers has exceeded 1 / 3 of the total ...

AI Technical Summary

Problems solved by technology

[0003] For above-mentioned situation, the object of the present invention is to provide a kind of compound fertilizer and production method thereof, it adopts the technology of mixing superphosphate and calcium magnesium phosphorus so as to overcome the defect that prior art compound fertilizer is easy to deliquescence, can prolong the hydrolysis of urea time, can improve the fertilizer efficiency, and the production process is simple, the production cost is low, the market prospect is broad, and it is easy to promote and use