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Slow-release compound fertilizer and preparation method thereof

A slow-release compound fertilizer and chemical composition technology, applied in the direction of nitrogen fertilizer, organic fertilizer, ammonium salt fertilizer, etc., can solve the problems of fertilizer loss, high cost, and inability to be effectively used, and achieve the effect of reducing production costs

Inactive Publication Date: 2017-12-01
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current production of compound fertilizers is mainly made of chemical fertilizers containing nitrogen, phosphorus and potassium elements, such as urea, potassium chloride and potassium phosphate, which not only have high costs, but also potassium chloride is very soluble in water. The fertilizer effect is easy to lose with the rain, and cannot increase the production and income of crops for a long time
[0003] At the same time, in the process of metallurgy, a large amount of solid waste will be produced, such as steel slag and slag, etc. These solid wastes are often thrown away as waste and cannot be effectively utilized

Method used

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  • Slow-release compound fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]First, prepare raw materials according to the following mass percentages: 25% dedusting ash, 30% phosphating slag, 35% ammonium sulfate and 10% binder, wherein the binder includes 20% steel slag, 70% slag and 10% desulfurization ash. Next, pour water accounting for 50% of the weight of the binder into the mixer, pour the weighed binder into the prepared water, start the mixer, control the mixer speed to 250r / min, mix for 2 minutes, and then weigh the The good dedusting ash, phosphating slag and ammonium sulfate are poured into the mixer, and the speed is increased to 500r / min, so that the added raw materials and the binder are mixed evenly, and the granulation is completed for 3 minutes. Finally, dry the above prepared fertilizer, control the water content to be less than 1%, and obtain a slow-release compound fertilizer. The nutrient content in the slow-release compound fertilizer is not less than 20.5%, wherein the nutrients include TN, P 2 o 5 and K 2 O.

Embodiment 2

[0042] First, prepare raw materials according to the following mass percentages: 30% dedusting ash, 28% phosphating slag, 32% ammonium sulfate and 10% binder, wherein the binder includes 30% steel slag, 65% slag and 5% desulfurization ash. Next, pour water accounting for 50% of the weight of the binder into the mixer, pour the weighed binder into the prepared water, start the mixer, control the mixer speed to 250r / min, mix for 2 minutes, and then weigh the The good dedusting ash, phosphating slag and ammonium sulfate are poured into the mixer, and the speed is increased to 500r / min, so that the added raw materials and the binder are mixed evenly, and the granulation is completed for 3 minutes. Finally, dry the above prepared fertilizer, control the water content to be less than 2%, and obtain a slow-release compound fertilizer. The nutrient content in the slow-release compound fertilizer is not less than 19.8%, wherein the nutrients include TN, P 2 o 5 and K 2 O.

Embodiment 3

[0044] First, prepare raw materials according to the following mass percentages: 30% dedusting ash, 30% phosphating slag, 30% ammonium sulfate and 10% binder, wherein the binder includes 30% steel slag, 65% slag and 5% desulfurization ash. Next, pour water accounting for 50% of the weight of the binder into the mixer, pour the weighed binder into the prepared water, start the mixer, control the mixer speed to 250r / min, mix for 2 minutes, and then weigh the The good dedusting ash, phosphating slag and ammonium sulfate are poured into the mixer, and the speed is increased to 500r / min, so that the added raw materials and the binder are mixed evenly, and the granulation is completed for 3 minutes. Finally, dry the above-mentioned prepared fertilizer, control the water content to be less than 1%, and obtain a slow-release compound fertilizer. The nutrient content in the slow-release compound fertilizer is not less than 20.3%, wherein the nutrients include TN, P 2 o 5 and K 2 O. ...

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Abstract

The invention relates to the technical field of agricultural fertilizers and particularly relates to a slow-release compound fertilizer and a preparation method thereof. The slow-release compound fertilizer is prepared from chemical components by mass percent: 20 to 30 parts of dedusting ash, 20 to 30% of phosphate residue, 20 to 35% of ammonium sulfate and 5 to 10% of binder, wherein the binder is prepared from chemical compounds by mass percent: 20 to 30% of steel slag, 50 to 70% of mineral slag and 5 to 10% of desulfurized fly ash. All the chemical components of the slow-release compound fertilizer disclosed by the invention are solid waste generated in a metallurgical process, so that the solid waste generated in the metallurgical process can be effectively utilized, and production cost of the compound fertilizer is reduced; meanwhile, the binder of the compound fertilizer disclosed by the invention further can slowly release nitrogen, phosphorus and potassium elements and give play to fertilizer efficiency to crops for a long time.

Description

technical field [0001] The invention relates to the technical field of agricultural chemical fertilizers, in particular to a slow-release compound fertilizer and a preparation method thereof. Background technique [0002] With the development of my country's agriculture and the continuous increase of agricultural products, the demand for fertilizers is increasing year by year. At present, in the field of chemical fertilizers, compound fertilizers are widely used in a large amount and cover a wide area. They are rich in N, P and K elements. After application, they can improve the yield and quality of agricultural products, and are widely welcomed by the market. However, the current production of compound fertilizers is mainly made of chemical fertilizers containing nitrogen, phosphorus and potassium elements, such as urea, potassium chloride and potassium phosphate, which not only have high costs, but also potassium chloride is very soluble in water. The fertilizer effect is...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/08C05G3/04C05G3/80C05G3/90
CPCC05C3/00C05G3/00C05G3/80C05G3/90C05D9/00C05F7/00
Inventor 卢丽君康凌晨张垒韩斌吴高明刘瑛李丽坤
Owner 武汉钢铁有限公司