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Production technology of humic acid sustained-release fertilizer

A slow-controlled-release fertilizer and production process technology, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve the problem that the application effect is difficult to meet the needs of crop growth, the slow-controlled-release fertilizer has low effective nutrient content, impact resistance and wear resistance. to improve crop quality, improve physical and chemical properties, and increase microbial communities

Inactive Publication Date: 2013-08-21
SUZHOU GULI BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This scheme has improved the fertilizer efficiency to a certain extent, but there are still shortcomings: the compatibility is not reasonable enough, the preparation process is cumbersome, the application range is small, and the application effect is difficult to meet the needs of crop growth.
[0005] At present, the research on thermoplastic resin and thermosetting resin-coated controlled-release fertilizer at home and abroad has achieved a high technological development, but the problem of high production cost has been to be solved
It has been reported that the method of using clay minerals, industrial waste solid powder, and liquid binder to wrap fertilizer to make controlled-release fertilizer has achieved the purpose of reducing production costs, but the product has low impact resistance and wear resistance; another On the one hand, due to the extensive use of clay minerals and industrial waste, the effective nutrient content of the prepared slow-release fertilizer is low, and harmful substances may be brought into the soil

Method used

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  • Production technology of humic acid sustained-release fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Mix 20kg of humic acid, 60kg of 0.5-3.5mm urea, 10kg of potassium dihydrogen phosphate, and 10kg of potassium nitrate to make common fertilizer.

Embodiment 2

[0019] Sieve 100kg fertilizer of 0.5-3.5mm urea and transfer it to the blast fluidized bed; spray linseed oil after preheating at 60-70°C, so that the linseed oil is coated on the surface of the continuously rolling fertilizer particles, and gradually wrapped to form a uniform liquid layer. Then spray 0.10-0.35mm weathered coal onto the continuously rolling fertilizer particles, and continue heating to keep the temperature of the material at 60-70°C; under the action of the binder, the weathered coal is wrapped into the moving fertilizer after 10-15 minutes. After the granular fertilizer is applied and solidified, an impact-resistant and wear-resistant coating layer is formed, and the primary coating is completed. Repeat the above operations in order until 5kg of weathered coal is completely wrapped on the fertilizer particles, and the humic acid coated slow-release fertilizer is obtained after the coating layer is cured.

Embodiment 3

[0021] Sieve 0.5-3.5mm urea 100kg fertilizer and transfer it to the blast fluidized bed; spray linseed oil after preheating at 60-70°C, so that the linseed oil is coated on the surface of the continuously rolling fertilizer particles, and gradually wrapped to form a uniform liquid layer. Then spray 0.10-0.35mm weathered coal onto the continuously rolling fertilizer particles, and continue heating to keep the temperature of the material at 60-70°C; under the action of the binder, the weathered coal is wrapped into the moving fertilizer after 10-15 minutes. After the granular fertilizer is applied and solidified, an impact-resistant and wear-resistant coating layer is formed, and the primary coating is completed. Repeat the above operations in order until 8kg of weathered coal is completely wrapped on the fertilizer particles, and the humic acid coated slow-release fertilizer is obtained after the coating layer is solidified.

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Abstract

The invention provides a production technology of a humic acid sustained-release fertilizer. The production technology comprises the following steps of: sieving granular core fertilizers, transferring into a blast fluidized bed; preheating and then spraying adhesive, coating the adhesive at the surfaces of continuously rolling fertilizer granules, gradually coating to form a uniform liquid layer; spraying weathered coal which is 5 to 15mass% of the granulated fertilizer on the continuously rolling fertilizer granules, keeping the temperature of the material at 60 to 70 DEG C for 10 to 15 minutes, so as to form a shock-resistant and wearing-resistant coated layer after the weathered coals are coated on the fertilizer granules and cured; repeating the operations until the weathered coals are all coated on the fertilizer granules, so as to obtain the humic acid coated sustained-release fertilizer. The fertilizer obtained in the invention can increase the microflora in soil, reduce heavy metal ion pollution in the soil and reduce phytotoxicity; furthermore, by adopting the production technology, the use rate of the fertilizer is improved, the agricultural non-point source pollution is reduced, the stress resistance of plants is increased and the quality of plants is improved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to agricultural product fertilizers, in particular to the production of a humic acid controlled-release fertilizer. Background technique [0002] Humic acid fertilizers better make up for the deficiencies of both inorganic fertilizers and organic fertilizers. Since humic acid is a natural organic polymer compound, it contains elements such as carbon, hydrogen, oxygen, nitrogen, aromatic nuclei, hydroxyl, carboxyl, Carbonyl, quinone, methoxy and other active genes. These active groups determine that humic acid has weak acidity, hydrophilicity, ion exchange, complexation, redox and physiological activity, etc., and has dual functions of improving soil and stimulating crop growth. Compared with solid fertilizers, humic acid liquid fertilizers are rich in nitrogen, phosphorus, potassium, copper, iron, manganese, zinc, boron and other nutrients necessary for plants, and have the ...

Claims

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Application Information

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IPC IPC(8): C05G3/00
Inventor 吴娟
Owner SUZHOU GULI BIOTECH
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