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.
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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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Abstract
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