CN103435024A - Method for producing feed grade calcium hydrophosphate - Google Patents
Method for producing feed grade calcium hydrophosphate Download PDFInfo
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- CN103435024A CN103435024A CN2013103419347A CN201310341934A CN103435024A CN 103435024 A CN103435024 A CN 103435024A CN 2013103419347 A CN2013103419347 A CN 2013103419347A CN 201310341934 A CN201310341934 A CN 201310341934A CN 103435024 A CN103435024 A CN 103435024A
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- calcium hydrophosphate
- hydrophosphate fodder
- iii type
- feed grade
- grade calcium
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Abstract
The invention discloses a method for producing feed grade calcium hydrophosphate III. The method comprises the steps as follows: slag field tank water and lime milk are mixed in a reactor and defluorinated, and after the obtained slurry is deposited, an supernatant liquid and the lime milk react in the reactor to obtain feed grade calcium hydrophosphate I, then react with phosphoric acid, and are dried, filtered and separated to obtain feed grade calcium hydrophosphate III. Compared with other methods of preparing feed grade calcium hydrophosphate III with wet process phosphoric acid, the method produces the feed grade calcium hydrophosphate I by utilizing phosphogypsum slag filed tank water with a low phosphorous content, treating and improving the content of the phosphorus are needless, the feed grade calcium hydrophosphate I can be directly produced only after purity removal, the product process is simple, and the phosphorus resource can be effectively reused. Moreover, the method is short in curing time, easy to control the process, and free of waste discharge during the whole process.
Description
Technical field
The present invention relates to a kind of production method of feed-grade calcium phosphate salt, specifically relate to calcium hydrophosphate fodder III type product, i.e. the production method of secondary calcium phosphate and biphosphate calcium compounds.
Background technology
In recent years, the eutrophication problem of water quality is more and more serious.Reclaim the P in sewage
2o
5can alleviate widely the pollution of phosphorus to environment, alleviate the situation of China's phosphor resource shortage.But the phosphorus content in sewage is lower, can only produce qualified secondary calcium phosphate, and, as the additive of animal-feed, secondary calcium phosphate is compared with monocalcium phosphate, the former phosphorus utilization is well below the latter.But the phosphoric acid that the latter's need of production is dense, can not be directly by reclaiming the phosphorus production in waste water.And calcium hydrophosphate fodder III type is the mixture of secondary calcium phosphate and monocalcium phosphate, water-soluble content is more than 10%, and citric acid soluble phosphorus content is more than 18%, and total phosphorous is more than 21%, can greatly improve the utilization ratio of animal to phosphorus.
Summary of the invention
The purpose of this invention is to provide a kind of phosphorus that can reclaim in waste water, and can produce the method for qualified calcium hydrophosphate fodder III type product.
The objective of the invention is to realize by following method:
A kind of method of producing calcium hydrophosphate fodder III type product, sequentially by the removal of impurities treatment process of phosphogypsum slag field Chi Shui, prepare calcium hydrophosphate fodder I type technique, prepare calcium hydrophosphate fodder III type technique and form; Described removal of impurities treatment process mainly comprises to phosphogypsum slag field Chi Shui and adds the sodium sulphite dearsenification, takes off lead, add milk of lime or lime defluorinate, and slurry filtration is obtained to two operations of qualified clear liquid, described calcium hydrophosphate fodder I type preparation technology comprises and milk of lime or lime is reacted and obtain slip with the clear liquid obtained, two operations of slip deposition dehydrating; The described calcium hydrophosphate fodder III type technique for preparing mainly comprises qualified calcium hydrophosphate fodder I type is reacted to the calcium hydrophosphate fodder III type that obtains with phosphoric acid.
Described phosphoric acid be concentration not higher than 60% phosphoric acid, preferably concentration is 40%-60%.
Above-mentioned slag field Chi Shui is containing H
3pO
44-7%.
Above-mentioned calcium hydrophosphate fodder I type total phosphorous Wei>=16.5%.
Further, the described preparation in calcium hydrophosphate fodder III type technique, calcium hydrophosphate fodder I type is (2.2-3.5) with phosphoric acid quality of material ratio: 1, and curing temperature is normal temperature, and the curing time is 1-2 days, and drying temperature is 60-80 ℃.
The invention has the advantages that: 1. with the method for other Producing Feed Calcium Hydrogen Phosphate with Wet Phosphoric Acid III type products, compare, present method is utilized phosphorous lower pond, phosphogypsum slag field aquatic producing feed-stage secondary calcium phosphate I type, do not need to improve phosphorus content through processing, after only needing removal of impurities, direct production obtains calcium hydrophosphate fodder I type, production process is simple, and can the effective recycling phosphor resource.2. in this law, the preparation of calcium hydrophosphate fodder III type product is that calcium hydrophosphate fodder I type and phosphoric acid are carried out to slaking, and the curing time is shorter, can not take very large slaking area, and process is easy to control.3. whole process no waste discharge.
The accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention.
Embodiment
Process flow sheet of the present invention as shown in Figure 1.
Raw material: phosphogypsum slag field Chi Shui, phosphorous 1.7%, lime, containing oxygen calcium>=85%
1. pond, slag field water impurity removal process:
A, pond water removal of impurities operation: Chi Shui, lime injected volume proportioning are Chi Shui: lime=1:0.01-0.02, and sodium sulphite is appropriate;
Control condition: pressure is normal pressure, temperature of reaction 30-60 ℃, and the reaction times is 1-2.5 hour;
The filtration of b, slip: filter plant is the automatic back-washing filter, obtains the clear liquid that phosphorus content is 1.2% left and right after filtration.
2. calcium hydrophosphate fodder I type preparation technology:
The clear liquid that filtration is obtained mixes with certain density milk of lime, regulates the pH value between 5.5-6.3, controls reaction times 1-3 hour.
3. the preparation technology of calcium hydrophosphate fodder III:
By the calcium hydrophosphate fodder I type and phosphoric acid mixing post curing obtained, the proportioning of phosphoric acid and calcium hydrophosphate fodder I type is determined according to phosphoric acid concentration.
Control condition: slaking is normal temperature;
Time is 1-2 days;
Drying temperature is 60-80 ℃.
Claims (5)
1. a method of producing calcium hydrophosphate fodder III type product, it is characterized in that the method by the removal of impurities treatment process of phosphogypsum slag field Chi Shui, prepare calcium hydrophosphate fodder I type technique, prepare calcium hydrophosphate fodder III type technique and form; Described removal of impurities treatment process mainly comprises to phosphogypsum slag field Chi Shui and adds the sodium sulphite dearsenification, takes off lead, add milk of lime or lime defluorinate, and slurry filtration is obtained to two operations of qualified clear liquid, described calcium hydrophosphate fodder I type preparation technology comprises and milk of lime or lime is reacted and obtain slip with the clear liquid obtained, two operations of slip deposition dehydrating; The described calcium hydrophosphate fodder III type technique for preparing mainly comprises qualified calcium hydrophosphate fodder I type is reacted with phosphoric acid by dry, screening and obtains calcium hydrophosphate fodder III type product.
2. the method for production calcium hydrophosphate fodder III type product according to claim 1, is characterized in that described slag field Chi Shui is containing H
3pO
44-7%.
3. the method for production calcium hydrophosphate fodder III type product according to claim 1, is characterized in that described phosphoric acid concentration is 40-60%.
4. the method for production calcium hydrophosphate fodder III type product according to claim 1, is characterized in that described calcium hydrophosphate fodder I type total phosphorous Wei>=16.5%.
5. according to the method for the described production calcium hydrophosphate fodder of claim 1-4 any one III type product, it is characterized in that described the preparation in calcium hydrophosphate fodder III type technique, calcium hydrophosphate fodder I type is 2.2-3.5:1 with phosphoric acid quality of material ratio, curing temperature is normal temperature, curing time is 1-2 days, and drying temperature is 60-80 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103419347A CN103435024A (en) | 2013-08-08 | 2013-08-08 | Method for producing feed grade calcium hydrophosphate |
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|---|---|---|---|
| CN2013103419347A CN103435024A (en) | 2013-08-08 | 2013-08-08 | Method for producing feed grade calcium hydrophosphate |
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| CN103435024A true CN103435024A (en) | 2013-12-11 |
Family
ID=49688778
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| CN2013103419347A Pending CN103435024A (en) | 2013-08-08 | 2013-08-08 | Method for producing feed grade calcium hydrophosphate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950911A (en) * | 2014-05-06 | 2014-07-30 | 云南磷化集团有限公司 | Method of preparing feed grade calcium hydrophosphate and co-producing water glass by using acid residues and yellow phosphorus slags |
| CN106744769A (en) * | 2017-02-21 | 2017-05-31 | 瓮福（集团）有限责任公司 | A kind of method that calcium coproduction sulphur ammonium is raised in utilization ardealite production |
| CN109534310A (en) * | 2019-01-31 | 2019-03-29 | 中化云龙有限公司 | Calcium hydrogen phosphate fodder dechromium method |
| CN111115602A (en) * | 2020-01-03 | 2020-05-08 | 云南磷化集团有限公司 | Preparation method of low-chromium feed-grade MDCP |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1146426A (en) * | 1996-08-23 | 1997-04-02 | 四川绵竹龙蟒矿物质饲料集团有限公司 | Production method for fodder grade calcium phosphate |
| CN102502553A (en) * | 2011-09-30 | 2012-06-20 | 瓮福（集团）有限责任公司 | Method for preparing feed grade calcium hydrogen phosphate from waste water of phosphate fertilizer plant |
| CN202508882U (en) * | 2012-03-28 | 2012-10-31 | 瓮福（集团）有限责任公司 | Device for preparing feed grade calcium phosphate dibasic through acid waste water |
-
2013
- 2013-08-08 CN CN2013103419347A patent/CN103435024A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1146426A (en) * | 1996-08-23 | 1997-04-02 | 四川绵竹龙蟒矿物质饲料集团有限公司 | Production method for fodder grade calcium phosphate |
| CN102502553A (en) * | 2011-09-30 | 2012-06-20 | 瓮福（集团）有限责任公司 | Method for preparing feed grade calcium hydrogen phosphate from waste water of phosphate fertilizer plant |
| CN202508882U (en) * | 2012-03-28 | 2012-10-31 | 瓮福（集团）有限责任公司 | Device for preparing feed grade calcium phosphate dibasic through acid waste water |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950911A (en) * | 2014-05-06 | 2014-07-30 | 云南磷化集团有限公司 | Method of preparing feed grade calcium hydrophosphate and co-producing water glass by using acid residues and yellow phosphorus slags |
| CN103950911B (en) * | 2014-05-06 | 2016-03-16 | 云南磷化集团有限公司 | Slag acid and yellow phosphorus furnace slag is utilized to prepare the method for calcium hydrophosphate fodder coproduction water glass |
| CN106744769A (en) * | 2017-02-21 | 2017-05-31 | 瓮福（集团）有限责任公司 | A kind of method that calcium coproduction sulphur ammonium is raised in utilization ardealite production |
| CN106744769B (en) * | 2017-02-21 | 2020-10-30 | 瓮福（集团）有限责任公司 | Method for producing feed calcium and co-producing ammonium sulfate by using phosphogypsum |
| CN109534310A (en) * | 2019-01-31 | 2019-03-29 | 中化云龙有限公司 | Calcium hydrogen phosphate fodder dechromium method |
| CN109534310B (en) * | 2019-01-31 | 2022-01-25 | 中化云龙有限公司 | Dechromization method for feed monocalcium phosphate |
| CN111115602A (en) * | 2020-01-03 | 2020-05-08 | 云南磷化集团有限公司 | Preparation method of low-chromium feed-grade MDCP |
| CN111115602B (en) * | 2020-01-03 | 2022-01-28 | 云南磷化集团有限公司 | Preparation method of low-chromium feed-grade MDCP |
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Application publication date: 20131211 |