Pelleting process for composite manure

A compound fertilizer and granulation technology, which is applied in the direction of fertilizer form, fertilization device, fertilizer mixture, etc., can solve the problems of strict process requirements, large equipment investment, complicated operation, etc., and achieve simple process method, low water content, and easy solution. block effect

Inactive Publication Date: 2004-09-22
TONGLING CHEM IND GRP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Slurry coating granulation and melt coagulation granulation can produce various compound fertilizers, but the equipment investment is large, the operation is complicated, the process requirements are strict, and the energy consumption is high
For high-concentration compound fertilizers, especially high-concentration and high-nitrogen compound fertilizers, if the above three processes do not use anti-caking agents or carry out anti-caking treatment with oil coating and powdering, there will be caking problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: Manufacture the compound fertilizer with ratio of nitrogen, phosphorus and potassium of 10-20-20.

[0013] Put 13 parts of urea, 13 parts of KCl, 14 parts of calcium superphosphate, 40 parts of monoammonium phosphate, crushed and mixed together with 50 parts of returned material into the granulation kiln for steam granulation, the temperature is 45 ℃, and the moisture content is 4.56%. Together with 20 parts of potassium chloride powder fertilizer, it enters the rotary kiln for drying, wrapping, and polishing. After drying, the temperature of the granular fertilizer is 55°C, and it is cooled, screened and packed. The granular fertilizer is round, and the granular fertilizer with a particle size between 1.5-4mm accounts for 83.5% of the total material. The analysis results of the finished product are, N: 10.26%, P 2 o 5 : 20.34%, K 2 O: 20.45%, H 2 O: 1.93%.

Embodiment 2

[0014] Embodiment 2: Manufacture the compound fertilizer with ratio of nitrogen, phosphorus and potassium of 20-10-10.

[0015] Mix and crush 23 parts of monoammonium phosphate, 30 parts of urea, 16 parts of ammonium chloride, and 14 parts of bentonite together with 60 parts of returned materials and send them to the granulation kiln for granulation by passing steam. The granular fertilizer and 16 parts of potassium chloride enter the drying kiln for wrapping, polishing and drying, and then sieving, cooling, measuring and packaging. The appearance of the product is round and round, and the passing rate of granulation into balls is 85.03%. 2 O: 1.83%.

Embodiment 3

[0016] Embodiment 3, prepare nitrogen, phosphorus, potassium ratio is 16-16-16 compound fertilizer.

[0017] Mix and crush 32 parts of monoammonium phosphate, 28 parts of urea, 14 parts of superphosphate, and 9 parts of potassium chloride together with 45 parts of returned material into a granulation kiln for steam granulation, a temperature of 50 ° C, and a moisture content of 4.02%. Together with 18 parts of potassium chloride powder fertilizer, enter the rotary drying kiln for drying, wrapping, and polishing. After drying, the temperature of the granular fertilizer is 55°C, and it is cooled, screened, and packed. The grain fertilizer is round and round, and the grain fertilizer accounts for 86.78% of the total material with a particle size between 1.5-4mm. The analysis result of the finished product is N: 16.03%, P 2 o 5 : 16.78,K 2 O: 16.23%; H 2 O: 1.97%.

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PUM

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Abstract

A process for granulating compound fertilizer includes such steps as proportionally mixing the basic fertilizers containing N, P and K, pulverizing at 30 deg.C under the 80% of relative humidity, granulating by coagulation in kiln, and drying in kiln. Its advantages are low cost, low energy consumption, and high fertility.

Description

Technical field: [0001] The technical scheme to be protected by the present invention belongs to the technical field of chemical fertilizer granulation technology, especially relates to the technical field of high-concentration and high-nitrogen compound fertilizer granulation. technical background: [0002] At present, there are three main granulation technologies for nitrogen, phosphorus and potassium compound fertilizers at home and abroad: agglomeration granulation, slurry coating granulation and melt condensation granulation. The characteristics of agglomeration granulation are: relatively small equipment investment, large operating flexibility, and convenient formula adjustment, but it is very difficult to produce high-concentration and high-nitrogen compound fertilizers with a total nutrient concentration of nitrogen, phosphorus, and potassium ≥ 40% and a nitrogen content ≥ 15%. , this is because the low-melting urea phosphate produced by this kind of high-concentrati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05G5/00
Inventor 叶丽君鲁军罗自力潘健崔应虎胡成军
Owner TONGLING CHEM IND GRP
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