CN104649724A - Production method of calcium superphosphate - Google Patents
Production method of calcium superphosphate Download PDFInfo
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- CN104649724A CN104649724A CN201510040156.7A CN201510040156A CN104649724A CN 104649724 A CN104649724 A CN 104649724A CN 201510040156 A CN201510040156 A CN 201510040156A CN 104649724 A CN104649724 A CN 104649724A
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- Prior art keywords
- production method
- calcium
- phosphoric acid
- reaction
- product
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Classifications
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B1/00—Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
- C05B1/02—Superphosphates
Abstract
The invention discloses a production method of calcium superphosphate. The production method comprises the following steps: blending the sludge left after strong phosphoric acid plate-frame filtration with phosphogypsum dreg site acidic wastewater in a certain ratio to form slurry, and then adding an appropriate amount of calcium powder for reacting for certain time, next, conveying the material to a drying section, and sieving and packaging the dried product to obtain the calcium superphosphate product. The production method of the calcium superphosphate has the following beneficial effects that (1) the sludge generated in wet-method phosphoric acid concentration is consumed to lay a foundation for gradient utilization of the phosphoric acid; (2) the phosphorus element in the phosphogypsum dreg site acidic wastewater is recovered, the waste is changed into things of value, and the effective utilization rate of the phosphorus is increased; and (3) the good-quality calcium superphosphate product can be obtained by use of the production method, and the production cost is low, and therefore, the production method has huge economic benefit, social benefit and environmental protection benefit.
Description
Technical field
The present invention relates to calcium superphosphate, specifically, is a kind of method utilizing strong phosphoric acid sludge to produce general calcium.
Background technology
Calcium superphosphate is first fertilizer variety in the world, has been the main fertilizer variety that Support agriculture is produced so far always, uses widely in China since invention in 1842, particularly a lack of sulfur, lack the use of phosphorus, varieties in saline-alkali areas.China's phosphate rock resource is rich and not rich, be not suitable with and produce high-concentration phosphate compound fertilizers in a large number, in addition produce high-concentration phosphate compound fertilizers and create a large amount of byproducts---phosphogypsum, pollute environment, a large amount of sulphur, calcium resource are abandoned, peasant has to again, and flower pays a high price for sulphur, calcium nutritive element goes to supplement, China rural laborer is sufficient, saltings is numerous, a large amount of demands is had to calcium superphosphate, therefore, calcium superphosphate will retain as the traditional category that adapts to China's phosphate rock resource, soil regime, plant growth demand and the market requirement for a long time.
General calcium main component is Ca (H
2pO
4)
2h
2o, anhydrous calciumsulphate and a small amount of phosphoric acid, containing effective P
4o
10about 14% ~ 20%, wherein 80% ~ 95% is water-soluble, belongs to water soluble quick-acting phosphate fertilizer, directly can make phosphate fertilizer, also can be used for compound fertilizer making.The general calcium production method of tradition is directly reacted with sulfuric acid and phosphorus ore, through the general calcium product of ageing, dry system.But, owing to not specifying the water-soluble phosphorus of general calcium inside China GB20413-2006 " calcium superphosphate " national standard, a lot of manufacturer is caused to mix the spurious with the genuine user cheating with fertilizer grade secondary calcium phosphate, along with the Rational of peasant's fertilising, calcium superphosphate is re-recognized by peasant again, and the new national standard of calcium superphosphate is also about to put into effect.The production technology of calcium superphosphate is also optimized thereupon, and general calcium market will present explosive growth.
Summary of the invention
Object of the present invention is devoted to the production method of seeking a kind of general calcium, to obtain high-quality calcium superphosphate product.
The present invention adopts following technical measures to realize, concrete steps are: the sludge after strong phosphoric acid Plate Filtration and gypsum stack acid waste water are sized mixing by a certain percentage, then appropriate calcium powder is added, after reaction certain hour, by mass transport to drying section, dried product is through sieving, being packaged to be general calcium product; The main component of described strong phosphoric acid sludge is as follows:
| Index | Total P 2O 5 | Water-soluble P 2O 5 | Moisture |
| Content (%) | 20～30 | 15～20 | 40～60 |
；
Described gypsum stack acid waste water main component is as follows:
| Index | P 2O 5 | F | Sulfate radical |
| Content (%) | 2～5 | 0.3～1.0 | ≤0.4 |
；
Described calcium powder is Wingdale, and its calcium oxide content is more than 90%;
The concrete technology parameter of described reaction is:
In reaction, the mass ratio of strong phosphoric acid what slag and acid waste water is: (4 ~ 8): 1;
In reaction, the mass ratio of strong phosphoric acid what slag and calcium powder is: (3 ~ 4): 1;
Temperature of reaction is 40 ~ 80 DEG C;
Reaction times is 15 ~ 90min.
After reaction, semi-product material moisture is lower than 10%.
Beneficial effect of the present invention is mainly reflected in some: (1) consumes the sludge produced in wet-process phosphoric acid concentration, for the cascade utilization of phosphoric acid carries out place mat; (2) reclaim the phosphoric in gypsum stack acid waste water, turn waste into wealth, improve the effective rate of utilization of phosphorus; (3) production method of the present invention can obtain high-quality calcium superphosphate product, and production cost is low, has huge economic benefit, social benefit and environmental benefit.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention.
Embodiment
Further illustrate the present invention below by way of specific embodiment, but be not used for limiting the scope of the invention.
Embodiment 1
Get 300g strong phosphoric acid what slag, its total P
2o
5be 21.2%, water-soluble P
2o
5be 18.3%, add 40g and face gypsum tailings field acid waste water, P in acid waste water
2o
5be 3.8%, after stirring, be heated to 80 DEG C, then add 60g calcium powder, after reaction 20min, material is carried out drying, namely obtains general calcium product.Product by analysis its main component is: total P
2o
5be 21.1%, effective P
2o
5be 19.2%, water-soluble P
2o
5be 15.5%, free acid content is 1.3%.Quality product meets the requirement of the general calcium of high-quality.
Embodiment 2
Get 300g strong phosphoric acid what slag, its total P
2o
5be 23.1%, water-soluble P
2o
5be 19.3%, add 60g and face gypsum tailings field acid waste water, P in acid waste water
2o
5be 3.8%, after stirring, be heated to 40 DEG C, then add 95g calcium powder, after reaction 30min, material is carried out drying, namely obtains general calcium product.Product by analysis its main component is: total P
2o
5be 20.5%, effective P
2o
5be 18.6%, water-soluble P
2o
5be 15.1%, free acid content is 0.5%.Quality product meets the requirement of the general calcium of high-quality.
Embodiment 3
Get 300g strong phosphoric acid what slag, its total P
2o
5be 24.2%, water-soluble P
2o
5be 17.8%, add 40g and face gypsum tailings field acid waste water, P in acid waste water
2o
5be 3.8%, after stirring, be heated to 70 DEG C, then add 75g calcium powder, after reaction 60min, material is carried out drying, namely obtains general calcium product.Product by analysis its main component is: total P
2o
5be 21.8%, effective P
2o
5be 19.6%, water-soluble P
2o
5be 16.1%, free acid content is 3.3%.Quality product meets the requirement of the general calcium of high-quality.
Claims (3)
1. the production method of a general calcium, it is characterized in that its step is as follows: the sludge after strong phosphoric acid Plate Filtration and gypsum stack acid waste water are sized mixing by a certain percentage, then appropriate calcium powder is added, after reaction certain hour, by mass transport to drying section, dried product is through sieving, being packaged to be general calcium product;
The main component of described strong phosphoric acid sludge is as follows:
；
Described gypsum stack acid waste water main component is as follows:
；
Described calcium powder is Wingdale, and its calcium oxide content is more than 90%;
The concrete technology parameter of described reaction is: in reaction, the mass ratio of strong phosphoric acid what slag and acid waste water is: (4 ~ 8): 1; In reaction, the mass ratio of strong phosphoric acid what slag and calcium powder is: (3 ~ 4): 1; Reaction times is 15 ~ 90min.
2. the production method of general calcium as claimed in claim 1, is characterized in that described temperature of reaction is 40 ~ 80 DEG C; Reaction times is 30 ~ 60min.
3. the production method of general calcium as claimed in claim 1, after it is characterized in that described reaction, semi-product material moisture controlled is below 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510040156.7A CN104649724A (en) | 2015-01-27 | 2015-01-27 | Production method of calcium superphosphate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510040156.7A CN104649724A (en) | 2015-01-27 | 2015-01-27 | Production method of calcium superphosphate |
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| Publication Number | Publication Date |
|---|---|
| CN104649724A true CN104649724A (en) | 2015-05-27 |
Family
ID=53241433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510040156.7A Pending CN104649724A (en) | 2015-01-27 | 2015-01-27 | Production method of calcium superphosphate |
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| CN (1) | CN104649724A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105130508A (en) * | 2015-09-18 | 2015-12-09 | 云南三环中化化肥有限公司 | Production method for double phosphate fertilizer |
| CN105175029A (en) * | 2015-09-11 | 2015-12-23 | 云南云天化股份有限公司 | Method for preparing phosphor (potassium) nitrate fertilizer by wet process phosphate sludge acid |
| CN105330343A (en) * | 2015-12-03 | 2016-02-17 | 关勇河 | Method for preparing superphosphate |
| CN110921642A (en) * | 2019-12-18 | 2020-03-27 | 瓮福（集团）有限责任公司 | Method and device for treating phosphoric acid slurry by wet process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1210840A (en) * | 1997-09-10 | 1999-03-17 | 龚家竹 | Wet process for producing ammonium phosphate by using phosphate sludge |
| CN1461742A (en) * | 2002-05-27 | 2003-12-17 | 马最瑶 | Dioscin industrial waste water, waste slag treatment technology |
| CN101591011A (en) * | 2009-07-06 | 2009-12-02 | 马健 | Processing spent acid is the method for calcium hydrophosphate fertilizer |
| CN102502551A (en) * | 2011-10-20 | 2012-06-20 | 瓮福（集团）有限责任公司 | Method for recycling phosphorus and fluorine in defluorination residues |
| CN103553722A (en) * | 2013-10-24 | 2014-02-05 | 瓮福（集团）有限责任公司 | Method for preparing super phosphate by use of ardealite slag site sewage |
| CN103613181A (en) * | 2013-11-29 | 2014-03-05 | 瓮福（集团）有限责任公司 | Method for treating phosphogypsum slag dump pool water by using low-grade lime |
-
2015
- 2015-01-27 CN CN201510040156.7A patent/CN104649724A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1210840A (en) * | 1997-09-10 | 1999-03-17 | 龚家竹 | Wet process for producing ammonium phosphate by using phosphate sludge |
| CN1461742A (en) * | 2002-05-27 | 2003-12-17 | 马最瑶 | Dioscin industrial waste water, waste slag treatment technology |
| CN101591011A (en) * | 2009-07-06 | 2009-12-02 | 马健 | Processing spent acid is the method for calcium hydrophosphate fertilizer |
| CN102502551A (en) * | 2011-10-20 | 2012-06-20 | 瓮福（集团）有限责任公司 | Method for recycling phosphorus and fluorine in defluorination residues |
| CN103553722A (en) * | 2013-10-24 | 2014-02-05 | 瓮福（集团）有限责任公司 | Method for preparing super phosphate by use of ardealite slag site sewage |
| CN103613181A (en) * | 2013-11-29 | 2014-03-05 | 瓮福（集团）有限责任公司 | Method for treating phosphogypsum slag dump pool water by using low-grade lime |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105175029A (en) * | 2015-09-11 | 2015-12-23 | 云南云天化股份有限公司 | Method for preparing phosphor (potassium) nitrate fertilizer by wet process phosphate sludge acid |
| CN105130508A (en) * | 2015-09-18 | 2015-12-09 | 云南三环中化化肥有限公司 | Production method for double phosphate fertilizer |
| CN105130508B (en) * | 2015-09-18 | 2019-04-05 | 云南三环中化化肥有限公司 | A kind of double production methods for burning phosphate fertilizer |
| CN105330343A (en) * | 2015-12-03 | 2016-02-17 | 关勇河 | Method for preparing superphosphate |
| CN110921642A (en) * | 2019-12-18 | 2020-03-27 | 瓮福（集团）有限责任公司 | Method and device for treating phosphoric acid slurry by wet process |
| CN110921642B (en) * | 2019-12-18 | 2023-12-26 | 瓮福（集团）有限责任公司 | Wet-process phosphoric acid slurry treatment method and device |
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Application publication date: 20150527 |