Biodegradable swelling slow releasing fertilizer and its manufacturing method

A biodegradable and chemical fertilizer technology, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve problems such as high price, environmental pollution, and ecological system imbalance, so as to improve yield and quality, reduce nitrosamine content, and increase humus The effect of content

Inactive Publication Date: 2007-01-31
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are two main problems in this kind of slow-release chemical fertilizers: one is to pollute the environment, as slow-release materials, inorganic substances (such as silicon, gypsum, metal salts, etc.), organic polymers (such as polyacrylamide, resin, polyolefin, etc.) , waste agricultural plastics, etc.) long-term use will seriously damage the normal structure of farmland soil, affect the yield and quality of crops, and cause new environmental pollution and ecological system imbalance. 2-10 times

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Grinding the degenerated corn that removes impurities, and sieving to get powder with a particle size of <3 mm;

[0030] (2) Put 200kg of the powder in item (1) into the mixing tank for strong stirring and mixing, and at the same time feed dry saturated steam with a pressure of 0.3MPa and a temperature of 130°C without condensed water for conditioning;

[0031] (3) Mix the tempered substance and urea in item (2) in a weight ratio of 20:80, and under the joint action of the screw rotation of the single-screw extrusion extruder and the control of the die head, the material in the molten state will gelatinize, After cooling, a three-dimensional skeleton structure is formed;

[0032] (4) Break the puffed product of item (3) into 5mm particles, and spray 2.5% oil foot of puffed product weight on its surface;

[0033] (5) The material in item (4) is sent into a ring die granulator to make 1025kg of cylindrical granular puffed slow-release chemical fertilizer.

[0034] M...

Embodiment 2

[0036] (1) Pulverize the degenerated wheat that removes impurities, and sieve to get the powder with a particle size of <3 mm;

[0037] (2) Send 250kg of the powder in item (1) into the mixing tank for strong stirring and mixing, and at the same time feed dry saturated steam with a pressure of 0.4MPa and a temperature of 140°C without condensed water for conditioning;

[0038] (3) Mix the conditioning substance and superphosphate in item (2) according to the weight ratio of 25:75, and under the joint action of the screw rotation of the twin-screw extrusion extruder and the control of the die head, the material in the molten state will be paste After cooling, a three-dimensional skeleton structure is formed;

[0039] (4) Break the puffed product of item (3) into 6mm particles, and spray 3% oil foot of puffed product weight on its surface;

[0040] (5) The material in item (4) is sent into a ring die granulator to make 1030kg of cylindrical granular puffed slow-release chemical...

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Abstract

The present invention discloses a bio-degradable puffed slowly-released chemical fertilizer and its preparation method. Said method includes the following steps: pulverizing industrial and agricultural wastes and discards of tained old grain, etc., regulating quality, uniformly mixing the above-mentioned obtained material with chemical fertilizer, utilizing puffing process to prepare puffed material, further breaking to obtain granules whose grain size is 5-8mm, spraying oil foot and granulating so as to obtain the invented product.

Description

【Technical field】 [0001] The invention relates to the technical field of fertilizers and fertilizer processing, in particular to a biodegradable expanded slow-release chemical fertilizer utilizing industrial and agricultural waste and a manufacturing method thereof. 【Background technique】 [0002] The low seasonal utilization rate of chemical fertilizers is one of the important reasons that cause pollution such as eutrophication of rivers, lakes and seas, and enter the human body through the food chain, posing a threat to human health and the ecological environment. Therefore, improving the utilization rate of agrochemicals and developing environmentally friendly slow-release materials is a very important and urgent task in the world's chemical industry. Among them, slow-release / controlled-release chemical fertilizers have the effect of matching plant physiology and growth patterns, so that they can be released to the surrounding environment at a predetermined speed at a spe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G1/00C05G3/00
Inventor 孙有光马建
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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