Granulation method of high-tower melt high-phosphorus compound fertilizer

A compound fertilizer and melt technology, which is applied in urea compound fertilizer, phosphate fertilizer, ammonium orthophosphate fertilizer, etc., can solve the problems of difficult urine fusion and restrictions on the application of high-tower compound fertilizers, achieve rounded particle surface, increase fine density, The effect of improving uniformity

Pending Publication Date: 2022-01-04
世纪云天(黑龙江)化学有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, at present, the product formula of high-tower melt granulation compound fertilizer in my country is mainly high-nitrogen compound fertilizer. Fertilizer has become a difficult problem in the entire high-tower compound fertilizer industry, and it also restricts the application of high-tower compound fertilizers in various crops

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  • Granulation method of high-tower melt high-phosphorus compound fertilizer

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A granulation process for high-tower melt high-phosphorus compound fertilizer, comprising the following steps:

[0033] a, raw material preparation, by weight, 290 parts of urea containing nitrogen 46%, 360 parts of powdery monoammonium phosphate containing 10% of nitrogen and 50% of phosphorus pentoxide, powdery chlorination of 60% of potassium oxide 220 parts of potassium, 15 parts of sodium sulfate and 8 parts of granulation additive.

[0034] b. Melting, urea is dropped into a melting tank and melted to make urine, the melting temperature is 110°C, the melting time is 55s, and the melting and stirring speed is 50r / min;

[0035] c. Primary mixing, transport the urine to the primary mixing tank, and add powdered monoammonium phosphate containing 10% nitrogen and 50% phosphorus pentoxide for stirring and mixing to make a slurry, the mixing temperature is 85°C, The mixing time is 28s, and the mixing speed is 70r / min;

[0036] c1, a ball mill, transport the mixed slurr...

Embodiment 2

[0042] A granulation process for high-tower melt high-phosphorus compound fertilizer, comprising the following steps:

[0043] a, raw material preparation, by weight, 310 parts of urea containing nitrogen 46%, 480 parts of powdery monoammonium phosphate containing 10% of nitrogen and 50% of phosphorus pentoxide, powdery chlorination of 60% of potassium oxide 300 parts of potassium, 24 parts of sodium sulfate and 15 parts of granulation additives.

[0044] b. Melting, urea is put into a melting tank and melted to make urine. The melting temperature is 120°C, the melting time is 65s, and the melting and stirring speed is 60r / min;

[0045] c. Primary mixing, transport the urine to the primary mixing tank, and add powdered monoammonium phosphate containing 10% nitrogen and 50% phosphorus pentoxide for stirring and mixing to make a slurry. The mixing temperature is 95°C. The mixing time is 32s, and the mixing speed is 80r / min;

[0046] c1, a ball mill, transport the mixed slurry ...

Embodiment 3

[0052] A granulation process for high-tower melt high-phosphorus compound fertilizer, comprising the following steps:

[0053] a, raw material preparation, by weight, 300 parts of urea containing 46% nitrogen, 410 parts of powdery monoammonium phosphate containing 10% nitrogen and 50% phosphorus pentoxide, and 60% powdery chloroform chloride containing potassium oxide 260 parts of potassium, 19 parts of sodium sulfate and 12 parts of granulation additive.

[0054] b. Melting, put urea into the melting tank and melt it to make urine. The melting temperature is 115°C, the melting time is 60s, and the melting and stirring speed is 55r / min;

[0055] c. Primary mixing: transport the urine to the primary mixing tank, and add powdered monoammonium phosphate containing 10% nitrogen and 50% phosphorus pentoxide for stirring and mixing to make a slurry. The mixing temperature is 90°C. The mixing time is 30s, and the mixing and stirring speed is 75r / min;

[0056] c1, a ball mill, the s...

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Abstract

The invention provides a granulation method of a high-tower melt high-phosphorus compound fertilizer, and relates to the technical field of compound fertilizer production, the granulation method comprises the following steps: a, a raw material preparation process: preparing urea, ammonium phosphate, potassium chloride, sodium sulfate and a granulation additive for later use; b, urea melting: feeding urea into a melting tank, and melting to prepare urine; c, primary mixing: conveying the urine into a primary mixing tank, adding ammonium phosphate, and stirring and mixing to prepare slurry; d, secondary mixing: conveying the mixed slurry of ammonium phosphate and urine into a secondary mixing tank, adding potassium chloride, sodium sulfate and a granulation additive, and stirring and mixing to prepare slurry; and e, granulation: conveying the secondarily mixed slurry to a granulator for granulation, and adding an emulsification step between the step e and the step d, so that the fineness of the slurry is improved, and the proportion of powdery materials during mixing can be increased.

Description

technical field [0001] The invention relates to the technical field of compound fertilizer production technology, in particular to a granulation method for high-tower melt high-phosphorus compound fertilizer. Background technique [0002] The compound fertilizer process of high-tower melt granulation has round particles, bright color, uniform nutrients, rapid dissolution, low cost, high output-to-capacity ratio, and energy saving. It is widely used in my country's compound fertilizer industry. [0003] At present, the production capacity of high-tower melt granulation compound fertilizer in my country has reached nearly 15 million tons, becoming the world's largest producer of high-tower compound fertilizer, with production and sales exceeding 10 million tons, accounting for nearly 50% of my country's compound fertilizer production and sales. Moreover, due to the advanced technology and high return on investment, domestic compound fertilizer manufacturers are actively buildi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G5/12C05G3/00
CPCC05G5/12C05B7/00C05G3/00C05C9/00C05D1/02C05D9/00
Inventor 张培升郑洪霖郑皓天
Owner 世纪云天(黑龙江)化学有限公司
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