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Method for producing slow-release fertilizer

A production method and technology for chemical fertilizers, applied in the directions of potash fertilizers, inorganic fertilizers, fertilization devices, etc., can solve the problems of low utilization rate of chemical fertilizers, economic waste of resources, environmental degradation, etc., so as to prolong the usable time, reduce chemical fertilizer pollution, and increase chemical fertilizer utilization. rate effect

Inactive Publication Date: 2016-08-10
ZHONGSHAN CHENGMING AGRI TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Statistics show that the utilization rate of nitrogen in fertilizers in my country is only 30-35%, most of which are lost through runoff, seepage and volatilization.
The low utilization rate of chemical fertilizers leads to serious losses, which not only cause waste of energy and resources and economic losses, but also lead to environmental degradation. This problem has become a bottleneck for the sustainable development of agriculture.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A kind of production method of slow-release chemical fertilizer, comprises steps:

[0015] S1. Making porous microbeads: Pour stone powder at a constant speed on the top of the puffing furnace. The temperature in the puffing furnace is 1150 ° C ~ 1200 ° C. What falls out from the bottom of the puffing furnace is expanded stone powder particles, which become porous microspheres expanded by stone powder after cooling. Beads and puffed stone powder have a particle size of 0.5-1.0 mm and a bulk density of 100-110 kg / m3;

[0016] S2. Making powdered chemical fertilizer: powdered chemical fertilizer is mixed fertilizer powder obtained by mixing nitrogen fertilizer powder, phosphate fertilizer powder and potassium fertilizer powder according to the mass ratio of 1:1:1, and the particle size of the mixed fertilizer powder is less than 0.5 mm;

[0017] S3. Heating chimera: Vacuumized in an environment of 100°C to 250°C. After the vacuum container is evacuated to a pressure of mi...

Embodiment 2

[0020] A kind of production method of slow-release chemical fertilizer, comprises steps:

[0021] S1. Making porous microbeads: Pour stone powder into the top of the puffing furnace at a constant speed. The temperature in the puffing furnace is 1200°C to 1250°C. What falls out from the bottom of the puffing furnace is expanded stone powder particles, which become porous microbeads expanded by stone powder after cooling. Beads and puffed stone powder have a particle size of 0.5-1.0 mm and a bulk density of 100-110 kg / m3;

[0022] S2. Making powdered chemical fertilizer: powdered chemical fertilizer is mixed fertilizer powder obtained by mixing nitrogen fertilizer powder, phosphate fertilizer powder and potassium fertilizer powder according to the mass ratio of 1:1:1, and the particle size of the mixed fertilizer powder is less than 0.5 mm;

[0023] S3. Heating chimera: Vacuumized in an environment of 250°C to 300°C, after the vacuum container is evacuated to a pressure of minus...

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Abstract

The present invention provides a method for producing a slow-release fertilizer. The method is as below: placing stone powder extruded porous beads in a vacuumized vacuum container, sucking out the gas in the stone powder porous extruded beads, stopping vacuum pumping, injecting a fertilizer to the vacuum container, mixing the stone powder extruded porous beads with the fertilizer evenly, gradually reducing the degree of vacuum to atmospheric pressure, adsorbing the fertilizer as much as possible to into the pores of the stone powder extruded porous beads , thus preparing a primary product of the slow-release fertilizer. The production method of the slow-release fertilizer provided by the invention prolongs the available time of fertilizer in soil, increases the utilization rate of fertilizer, and reduce fertilizer pollution.

Description

【Technical field】 [0001] The invention relates to a production method of a slow-release chemical fertilizer, which belongs to the technical field of agricultural chemical fertilizers. 【Background technique】 [0002] Chemical fertilizers have an important impact on my country's food safety production. Experts predict that with the increase of rigid demand for grain, the production of chemical fertilizer will maintain a rapid growth momentum. Statistics show that the utilization rate of nitrogen in my country's fertilizers is only 30-35%, most of which are lost through runoff, seepage and volatilization. The low utilization rate of chemical fertilizers leads to serious losses, which not only cause waste of energy and resources and economic losses, but also lead to environmental degradation. This problem has become a bottleneck problem for the sustainable development of agriculture. [0003] In order to solve the above-mentioned technical problems, it is necessary to provide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
CPCC05D1/02C05G3/80C05G5/30
Inventor 曾凡强曾松清
Owner ZHONGSHAN CHENGMING AGRI TECH DEV CO LTD
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