Compound fertilizer and production method thereof

Abstract

The invention discloses a production method for a compound fertilizer; raw materials after metering are mixed evenly and crushed to obtain a powdery raw material; the powdery raw material and leftovers are sent into a material bed of a granulator; gaseous ammonia after metering overflows from a branch pipe end of an ammonia pipeline through an ammonia distributor, a metered sulfuric acid solution having the concentration of 98% is sprayed to the surface of a bed layer material through a sprayer; the gaseous ammonia and the sulfuric acid solution are subjected to a neutralization reaction, ammonium sulfate is generated and heat is produced, so that the powdery raw material forms a molten state; the material bed is used for rolling granulation, a solid solution raw material is subjected to solid dissolving and bonding under the action of high temperature to form a complex salt material, and particles are formed by using circumference rolling of the granulator; the formed particles are dried, cooled, sieved and coated to form the compound fertilizer finished product. The production method of the compound fertilizer reduces the quantity of a liquid phase brought into the system, omits conventional heating and drying procedures, and reduces the processing energy consumption.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a compound fertilizer and a production method thereof. Background technique [0002] Compound fertilizer is a general term for compound fertilizer and mixed fertilizer, which is processed by chemical and physical methods. The production of compound fertilizer can improve the fertilizer efficiency, reduce the number of fertilization, and save the cost of fertilization. The production and application of compound fertilizers have attracted worldwide attention. The world's consumption has exceeded 1 / 3 of the total consumption of chemical fertilizers, and my country accounts for about 18% of the total domestic consumption of chemical fertilizers. my country's crops are diversified, and the soil has also been replaced by the so-called "correction fertilization" that overcomes the lack of a single nutrient element in the past. "Transfer to "balanced fertilization" with a variety of...

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Problems solved by technology

[0004] However, the processing period of the agglomerate method and hot air drying is long and consumes a lot of energy, which can no longer meet people's requirements for production cycle and energy consumption.

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