Weathered coal-containing potassium sulfate composite fertilizer treated by acidulation and manufacturing method thereof

A potassium sulfate type and manufacturing method technology, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve problems such as inability to be absorbed by plants, poor organic matter activity, soil compaction, etc.

Inactive Publication Date: 2013-02-27
SHANDONG SHOUGUANG DADI LVYUAN FERTILIZER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, potassium sulfate compound fertilizers do not contain organic matter, and the utilization rate of fertilizer efficiency is low. Long-term use may easily cause soil compaction.
Some potassium sulfate compound fertilizers containing organic matter cannot be absorbed by plants due to the poor activity of organic matter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The acid precipitation method of the present invention treats weathered coal to produce potassium sulfate type compound fertilizer, including the following proportions by weight:

[0020] Weathered coal 30 , sulfuric acid 24 , gas ammonia 3 ,

[0021] Monoammonium Phosphate 20, Urea 5, Potassium Chloride 14,

[0022] Medium and trace element fertilizer 5.

[0023] The medium and trace element fertilizer is one or a mixture of magnesium sulfate, zinc sulfate, borax and calcium powder. The sulfuric acid adopts the industrial concentrated sulfuric acid with a concentration of 98%.

[0024] Described a kind of manufacture method of acid precipitation processing weathered coal to produce potassium sulfate type compound fertilizer comprises the following steps:

[0025] Step A) According to the above-mentioned proportioning, adding potassium chloride and 22 parts of weathered coal to the conversion tank after metering and adding sulfuric acid to carry out the low-temperatu...

Embodiment 2

[0030] The proportion by weight of the raw materials of the product is: 32 parts of powdered weathered coal; 24.5 parts of industrial sulfuric acid; 15.8 parts of potassium chloride; 4.2 parts of gas ammonia; 24.5 parts of monoammonium phosphate; 10.5 parts of urea; 26 parts of hydrochloric acid.

[0031] Step A) 15.8 parts of potassium chloride and 22 parts of weathered coal with fineness≤0.425mm and 24.5 parts of industrial sulfuric acid are added in the potassium hydrogensulfate conversion tank after metering, and the acidification of low-temperature potassium hydrogensulfate conversion reaction and humic acid is carried out Activation treatment is made into a mixed slurry of excess sulfuric acid, potassium hydrogen sulfate and weathered coal, and then 1.5 parts of gas ammonia is added for preliminary neutralization reaction, and the hydrogen chloride gas released during the conversion of potassium hydrogen sulfate is absorbed at the same time. 26 parts of 30% industrial hy...

Embodiment 3

[0036] The proportion by weight of the raw materials of the product is: powdered weathered coal addition amount of 30 parts, industrial sulfuric acid 25 parts, potassium chloride 15 parts, gas ammonia 5 parts, monoammonium phosphate 29 parts, urea 13 parts, calcium powder 3 parts share. The production process produces 25 parts of hydrochloric acid with 30% by-product

[0037] Wherein step A) adds 22 parts of weathered coal, and step D) adds 8 parts of weathered coal. In step B), 9 parts of monoammonium phosphate are added, and in step D) 20 parts are added.

[0038] The specific production steps are the same as those in Example 1.

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PUM

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Abstract

The invention belongs to the technical field of composite fertilizer production, and relates to weathered coal-containing potassium sulfate composite fertilizer treated by acidulation and a manufacturing method thereof. Traditional ammonified granular potassium sulfate composite fertilizer is added with powdery weathered coal and then is subjected to activation treatment by ammonia and an acid to form the weathered coal-containing potassium sulfate composite fertilizer treated by acidulation. The weathered coal-containing potassium sulfate composite fertilizer treated by acidulation has the advantages of reasonable compatibility, balanced nutrition, and good effects of improving soil quality, stimulating plant root development and improving a fertilizer utilization rate. The weathered coal-containing potassium sulfate composite fertilizer treated by acidulation is novel sulfur-base composite fertilizer rich in organic matters and multiple nutrient elements.

Description

technical field [0001] The invention belongs to the technical field of compound fertilizer production, and relates to an acid precipitation method to process weathered coal to produce potassium sulfate type compound fertilizer and a manufacturing method thereof. Background technique [0002] At present, potassium sulfate type compound fertilizers do not contain organic matter, the fertilizer efficiency and utilization rate are low, and long-term use is likely to cause soil compaction. Some potassium sulfate type compound fertilizers containing organic matter cannot be absorbed by plants due to the poor activity of organic matter. [0003] Weathered coal is a coal seam exposed on the surface or buried in a shallow part. It has been in contact with water and air for a long time, and has undergone long-term oxidation and hydrolysis weathering, which makes the coal loose and brittle, the color becomes lighter, the humidity increases, and the internal molecular structure Great c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
Inventor 杨洁杨忠会曹杰许士明
Owner SHANDONG SHOUGUANG DADI LVYUAN FERTILIZER IND
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