CN103980008B - A kind of method improving normal superphosphate exterior quality - Google Patents
A kind of method improving normal superphosphate exterior quality Download PDFInfo
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- CN103980008B CN103980008B CN201410238984.7A CN201410238984A CN103980008B CN 103980008 B CN103980008 B CN 103980008B CN 201410238984 A CN201410238984 A CN 201410238984A CN 103980008 B CN103980008 B CN 103980008B
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Abstract
The present invention discloses a kind of method improving normal superphosphate exterior quality, comprises the following steps: mixed with the white fertile ratio by weight 2 ~ 3:1 ~ 2 by the normal superphosphate after overcuring, and stir, obtained work in-process fertilizer; Then work in-process fertilizer is mixed with the ratio of kaolin by weight 3 ~ 5:1, and stir, obtained fertilizer finished product.The white fertilizer of the present invention mixes with normal superphosphate, utilizes the citric acid soluble phosphorus and monocalcium phosphate that contain in white fertilizer, reacts with the free acid in normal superphosphate, reduce the free acid content in normal superphosphate.
Description
Technical field
The present invention relates to technical field of chemical fertilizer production, be specifically related to a kind of method improving normal superphosphate exterior quality.
Background technology
Normal superphosphate is a kind of broad-spectrum fertilizer variety, whole nation annual requirement reaches 8,000,000 tons, the production technique of normal superphosphate adopts box den process, phosphorus ore makes phosphate ore pulp after crushing grinding, after in fertilizer mixer, short mix is reacted with the vitriol oil, slip enters in aerobic fermentation tank and obtained work in-process through 8 hours after high-temperature maturing, after natural slaking in 15 days, moisture evaporation, obtain finished product.
At south China, under the impact of rainy weather, the free acid in normal superphosphate easily absorbs the moisture in air, utilize common woven bag as packing material, short period of time placement easily causes the phenomenon that hardens, and not only causes fertilizer normally to use, but also can affect the quality of fertilizer.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method improving normal superphosphate exterior quality, with the normal superphosphate that the method is obtained, its exterior quality is greatly improved, place 3 moonsets after utilizing common woven bag to pack and occur the phenomenon that hardens, and product rarefaction is better.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
Improve a method for normal superphosphate exterior quality, comprise the following steps: first, the normal superphosphate after overcuring is mixed with the white fertile ratio by weight 2 ~ 3:1 ~ 2, and stirs, obtained work in-process fertilizer; Then work in-process fertilizer is mixed with the ratio of kaolin by weight 3 ~ 5:1, and stir, obtained fertilizer finished product.
Containing the citric acid soluble phosphorus of about 22% and monocalcium phosphate in white fertilizer, react with the free acid in normal superphosphate, reduce the free acid content in normal superphosphate, and then greatly reduce the phenomenon that hardens of normal superphosphate, even make normal superphosphate there will not be the phenomenon that hardens within a certain period of time.
Preferably, described normal superphosphate after overcuring mixes with the white fertile ratio by weight 3:2, and stirs, obtained work in-process fertilizer; Described work in-process fertilizer mixes with the ratio of kaolin by weight 3:1, and stirs, obtained fertilizer finished product.
Preferably, described white fertilizer is the industrial residue oven dry after being produced by calcium hydrophosphate fodder is 8 ~ 12% gained to its water content.
Preferably, the water content of described normal superphosphate after overcuring is 18 ~ 20%.
Preferably, the water content of described work in-process fertilizer is 13.2 ~ 14.8%.
Compared with prior art, the white fertilizer of the present invention mixes with normal superphosphate, utilizes the citric acid soluble phosphorus and monocalcium phosphate that contain in white fertilizer, reacts with the free acid in normal superphosphate, reduce the free acid content in normal superphosphate; Based on the principle that free acid can react with citric acid soluble phosphorus and monocalcium phosphate, the ratio being 2 ~ 3:1 ~ 2 by weight by normal superphosphate and white fertilizer mixes, the most of free acid in normal superphosphate can be made to be reacted, and make the water content of normal superphosphate be reduced to 14.8% by 18%, meeting normal superphosphate water content in national standard is completely the requirement of 15%, and the content of available phosphorus brings up to 16% by original 12% in addition; And when guaranteeing content >=12% of finished product available phosphorus, allocate kaolin into, to reduce production cost and to have ensured quality product.
Embodiment
Clear, complete description is carried out to the technical scheme in the present invention below; described embodiment is only the present invention's several embodiments wherein; and be not the whole embodiment of the present invention; under not departing from the present invention and designing the prerequisite of spirit; the every other embodiment that those of ordinary skill in the art make technical scheme of the present invention, all should fall within the scope of protection of the present invention.
Embodiment 1
First, the normal superphosphate after overcuring is mixed with the white fertile ratio by weight 2:1, and stirs, obtained work in-process fertilizer; Then work in-process fertilizer is mixed with the ratio of kaolin by weight 3:1, and stir, obtained fertilizer finished product.
Described white fertilizer is the industrial residue oven dry after being produced by calcium hydrophosphate fodder is 8% gained to its water content.
The water content of described normal superphosphate after overcuring is 18%.
The water content of described work in-process fertilizer is 13.2%.
Embodiment 2
First, the normal superphosphate after overcuring is mixed with the white fertile ratio by weight 3:2, and stirs, obtained work in-process fertilizer; Then work in-process fertilizer is mixed with the ratio of kaolin by weight 4:1, and stir, obtained fertilizer finished product.
Described white fertilizer is the industrial residue oven dry after being produced by calcium hydrophosphate fodder is 10% gained to its water content.
The water content of described normal superphosphate after overcuring is 19%.
The water content of described work in-process fertilizer is 14%.
Embodiment 3
First, the normal superphosphate after overcuring is mixed with the white fertile ratio by weight 2.5:1.5, and stirs, obtained work in-process fertilizer; Then work in-process fertilizer is mixed with the ratio of kaolin by weight 5:1, and stir, obtained fertilizer finished product.
Described white fertilizer is the industrial residue oven dry after being produced by calcium hydrophosphate fodder is 12% gained to its water content.
The water content of described normal superphosphate after overcuring is 20%.
The water content of described work in-process fertilizer is 14.8%.
Embodiment 4
First, the normal superphosphate after overcuring is mixed with the white fertile ratio by weight 1:1, and stirs, obtained work in-process fertilizer; Then work in-process fertilizer is mixed with the ratio of kaolin by weight 3.5:1, and stir, obtained fertilizer finished product.
Described white fertilizer is the industrial residue oven dry after being produced by calcium hydrophosphate fodder is 11% gained to its water content.
The water content of described normal superphosphate after overcuring is 18.5%.
The water content of described work in-process fertilizer is 13.8%.
Embodiment 5
First, the normal superphosphate after overcuring is mixed with the white fertile ratio by weight 2.8:1.5, and stirs, obtained work in-process fertilizer; Then work in-process fertilizer is mixed with the ratio of kaolin by weight 4.6:1, and stir, obtained fertilizer finished product.
Described white fertilizer is the industrial residue oven dry after being produced by calcium hydrophosphate fodder is 11.6% gained to its water content.
The water content of described normal superphosphate after overcuring is 18.8%.
The water content of described work in-process fertilizer is 14.2%.
Claims (4)
1. improve a method for normal superphosphate exterior quality, it is characterized in that, comprise the following steps: the normal superphosphate after overcuring is mixed with the white fertile ratio by weight 2 ~ 3:1 ~ 2, and stirs, obtained work in-process fertilizer; Then work in-process fertilizer is mixed with the ratio of kaolin by weight 3 ~ 5:1, and stir, obtained fertilizer finished product; The water content of wherein said normal superphosphate after overcuring is 18 ~ 20%.
2. the method for raising normal superphosphate exterior quality according to claim 1, is characterized in that: described normal superphosphate after overcuring mixes with the white fertile ratio by weight 3:2, and stirs, obtained work in-process fertilizer; Described work in-process fertilizer mixes with the ratio of kaolin by weight 3:1, and stirs, obtained fertilizer finished product.
3. the method for described raising normal superphosphate exterior quality according to claim 1, is characterized in that: described white fertilizer is the industrial residue oven dry after being produced by calcium hydrophosphate fodder is 8 ~ 12% gained to its water content.
4. the method for the raising normal superphosphate exterior quality according to claims 1 to 3 any one, is characterized in that: the water content of described work in-process fertilizer is 13.2 ~ 14.8%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410238984.7A CN103980008B (en) | 2014-05-30 | 2014-05-30 | A kind of method improving normal superphosphate exterior quality |
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| CN201410238984.7A CN103980008B (en) | 2014-05-30 | 2014-05-30 | A kind of method improving normal superphosphate exterior quality |
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| CN103980008A CN103980008A (en) | 2014-08-13 |
| CN103980008B true CN103980008B (en) | 2015-12-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105418167A (en) * | 2015-11-19 | 2016-03-23 | 昆明川金诺化工股份有限公司 | Method of reducing triple superphosphate free acid with fertilizer grade calcium hydrophosphate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1205995A (en) * | 1997-07-21 | 1999-01-27 | 湖北省荆襄磷化学工业公司 | Production method of granulated common calcium superphosphate |
| CN1373108A (en) * | 2001-10-16 | 2002-10-09 | 广东省生态环境与土壤研究所 | Activated phosphate fertilizer composition |
| CN103253996A (en) * | 2012-10-09 | 2013-08-21 | 赵正富 | Production process of compound phosphate fertilizer |
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2014
- 2014-05-30 CN CN201410238984.7A patent/CN103980008B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1205995A (en) * | 1997-07-21 | 1999-01-27 | 湖北省荆襄磷化学工业公司 | Production method of granulated common calcium superphosphate |
| CN1373108A (en) * | 2001-10-16 | 2002-10-09 | 广东省生态环境与土壤研究所 | Activated phosphate fertilizer composition |
| CN103253996A (en) * | 2012-10-09 | 2013-08-21 | 赵正富 | Production process of compound phosphate fertilizer |
Non-Patent Citations (1)
| Title |
|---|
| 掺混(BB)肥的工艺生产特点;胡长青等;《安徽化工》;20081231(第S1期);35-37 * |
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