Process for preparing non-soluble potassium fertilizer by using potassium-bearing minerals

A process method and mineral technology, applied in the fields of potash fertilizer, application, inorganic fertilizer, etc., can solve the problem of not finding relevant patents, and achieve the effect of reducing soil viscosity, soil compaction, and easy operation.

Active Publication Date: 2013-06-26
TSINGHUA UNIV
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Problems solved by technology

In the English patent retrieval system provided by the World Intellectual Property Organization, no relevan

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  • Process for preparing non-soluble potassium fertilizer by using potassium-bearing minerals

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Example Embodiment

[0028] Example 1

[0029] A kind of technological method that utilizes potassium-containing minerals to prepare insoluble potash fertilizer, such as figure 1 , the specific steps are as follows:

[0030] (1) Use a hammer mill to crush the potassium-containing minerals to a particle size of less than 5 cm;

[0031] (2) The material obtained in step (1) is sent into a Raymond mill, and pulverized to an average particle size of 200 orders;

[0032] (3) feed the material obtained in step (2) into a double-barreled ball mill (the patent application number of this ball mill: 200520022911.0), add ammonium phosphate at the same time, the mass ratio of ammonium phosphate and material is 3: 7, carry out microcrystallization processing, activate wherein Potassium element; control the grinding time so that the average particle size of the product after microcrystallization processing is 500 mesh, and obtain an insoluble potassium fertilizer;

[0033] (4) The product obtained in step (3...

Example Embodiment

[0035] Example 2

[0036] A kind of processing method that utilizes potassium-containing minerals to prepare insoluble potash fertilizer, its concrete steps are as follows:

[0037] (1) Use a universal pulverizer to crush the potassium-containing minerals to a particle size of less than 5cm;

[0038] (2) The material obtained in step (1) is sent into a vortex mill, and pulverized to an average particle size of 230 orders;

[0039] (3) feed the material obtained in step (2) into a double-barreled ball mill (the patent application number of this ball mill: 200520022912.5), and add ethyl lactate at the same time, the mass ratio of ethyl lactate and material is 5: 19, and carry out microcrystallization processing, Activate the potassium element in it; control the grinding time so that the average particle size of the product after microcrystallization processing reaches 450 mesh, and obtain insoluble potassium fertilizer;

[0040] (4) The product obtained in step (3) is packed f...

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Abstract

The invention discloses a process for preparing non-soluble potassium fertilizer by using potassium-bearing minerals, and belongs to the technical field of fertilizer preparation. According to the process, natural potassium-bearing minerals containing 6-15 percent of K2O are used as the raw materials; potassium element in the potassium-bearing minerals is activated by using a mechanical activation method so that the potassium element has the efficacy of a common chemical fertilizer; the potassium fertilizer is a non-soluble potassium fertilizer and not easily lost with rainwater, and can be used for reducing the soil viscosity, enhancing the soil looseness and reducing the unique characteristics of soil hardening; the preparation process is simple, is easy in operation, and has the advantages of good effect, less investment, no pollution and the like; by utilizing the process, the utilization rate of potassium-bearing minerals reaches 100 percent, and no tailings are discharged; and the process opens up a new technical approach for potassium fertilizer industrial production.

Description

technical field [0001] The invention belongs to the technical field of fertilizer preparation, and relates to a process for preparing insoluble potassium fertilizer by using potassium-containing minerals, in particular to a new fertilizer production process for preparing insoluble potassium fertilizer by using natural potassium-containing minerals under physical processing conditions. Background technique [0002] Potassium fertilizer is one of the three major chemical fertilizers widely used in agriculture and is essential for plant production. There are relatively few types of potash fertilizers, about 95% of which are potassium chloride, about 5% of sulfate-type potassium fertilizers, and very small amounts of nitric acid, carbonic acid and phosphate-type potassium fertilizers. The world is rich in soluble potassium resources, with proven reserves of nearly 20 billion tons. The reserves of the former Soviet Union and Canada account for more than 90% of the world's total r...

Claims

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Application Information

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IPC IPC(8): C05D1/04
Inventor 盖国胜杨玉芬朱再胜何振全吕乐福王明玲
Owner TSINGHUA UNIV
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