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Coating slow-release fertilizer production method

A manufacturing method, coated slow-release technology, applied in the direction of layered/coated fertilizers, organic fertilizers, inorganic fertilizers, etc., can solve problems such as difficult large-scale production, high price of coating agents, complex production process, etc., to achieve cycle time Short length, significant fertilizer saving effect, and simple production process

Inactive Publication Date: 2015-03-25
SHANDONG ENBAO BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the common problem of controlled-release chemical fertilizers at home and abroad is the pollution of the environment
[0004] At present, most fertilizers are produced due to the complicated production process, strict equipment requirements or high price of coating agent, so that the cost of the product is much higher than that of ordinary ammonium chloride and urea by 1-:3 times, or the pollution of the environment due to chemical production , it is difficult to promote to large-scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (l) Material pretreatment: mix 25% of wheat straw, 30% of corn stalk, and 45% of peanut shell to pulverize with a roller mill, pass through a 2-3mm sieve, and take the under-sieve powder;

[0018] (2) Conditioning: Send the obtained undersize powder into the conditioning device, control the speed of the conditioning shaft to 200r / min, and pass in supersaturated steam with a pressure of 0.5MPa and a temperature of 135°C for conditioning;

[0019] (3) Fertilizer dissolving: 40 parts of urea, 20 parts of ammonium phosphate, 20 parts of potassium chloride, and 20 parts of superphosphate are dissolved in water, and the sieve powder that has been tempered is immersed in the chemical fertilizer aqueous solution;

[0020] (4) Controlled-release chemical fertilizer: mix the straw powder and butter soaked in the chemical fertilizer aqueous solution at a ratio of 100:3, send it to an extruder for expansion treatment, cool and dehumidify, and make a controlled-release chemical fert...

Embodiment 2

[0025] (l) Material pretreatment: mix 25% of wheat straw, 30% of corn stalk, and 45% of peanut shell to pulverize with a roller mill, pass through a 2-3mm sieve, and take the under-sieve powder;

[0026] (2) Conditioning: Send the obtained undersize powder into the conditioning device, control the speed of the conditioning shaft to 400r / min, and pass in supersaturated steam with a pressure of 0.5MPa and a temperature of 155°C for conditioning;

[0027] (3) Fertilizer dissolving: 40 parts of urea, 20 parts of ammonium phosphate, 20 parts of potassium chloride, and 20 parts of superphosphate are dissolved in water, and the sieve powder that has been tempered is immersed in the chemical fertilizer aqueous solution;

[0028] (4) Controlled-release chemical fertilizer: mix the straw powder and butter soaked in the chemical fertilizer aqueous solution at a ratio of 100:3, send it to an extruder for expansion treatment, cool and dehumidify, and make a controlled-release chemical fert...

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PUM

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Abstract

The present invention discloses a coating slow-release fertilizer production method, which is characterized by comprising: (1) material pre-treatment, (2) conditioning, (3) fertilizer dissolving, (4) controlled release fertilizer production, (5) composite coupling agent production, (6) composite fertilizer production, and (7) coating. According to the present invention, straws and other crops have excellent adsorption so as to significantly improve the slow-release effect of the fertilizer and solve the problem of soil hardening caused by long term fertilizer application, and become the complement components of the long-acting fertilizer; the coupling method is adopted, and waste gas, waste water and waste are not produced so as not to pollute the environment; and the production process is simple, the special equipment is not required, the period is short, the cost is low, the product price is equivalent to the urea price, the fertilizer utilization rate is high, the fertilizer saving effect is significant, and the slow control efficiency of the fertilizer is improved through the coating.

Description

technical field [0001] The invention relates to the field of fertilizer processing, in particular to a method for manufacturing coated slow-release fertilizers. Background technique [0002] The seasonal utilization rate of my country's chemical fertilizers is only 30-35% for nitrogen fertilizers, 10-25% for phosphorus fertilizers, and 35-50% for potassium fertilizers, which are far below the level of developed countries in the world. At present, the common problem of controlled-release chemical fertilizers at home and abroad is the pollution of the environment. Long-term use of inorganic substances (such as silicon, zeolite, metal salts, etc.) and organic polymers (such as polyacrylamide, rubber, etc.) as slow / controlled release materials will damage the normal structure of farmland soil and cause serious environmental pollution. application in food production. [0003] Slow-release fertilizers can reduce fertilizer nutrients especially Nitrogen Reduced losses in soi...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05B1/02C05G3/90C05G5/36C05B7/00C05C9/00C05D1/02C05F11/00
Inventor 张守福
Owner SHANDONG ENBAO BIOTECH
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