CN1063313C - Wet process for producing calcium hydrophosphate as fodder from phosphoric acid - Google Patents
Wet process for producing calcium hydrophosphate as fodder from phosphoric acid Download PDFInfo
- Publication number
- CN1063313C CN1063313C CN95105662A CN95105662A CN1063313C CN 1063313 C CN1063313 C CN 1063313C CN 95105662 A CN95105662 A CN 95105662A CN 95105662 A CN95105662 A CN 95105662A CN 1063313 C CN1063313 C CN 1063313C
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- phosphoric acid
- reaction
- composite fertilizer
- calcium hydrophosphate
- compound fertilizer
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Abstract
The present invention relates to a technology for preparing feed-grade calcium hydrophosphate by using wet-process phosphoric acid, which comprises: a reactor is added in a device for producing compound fertilizer; purified phosphoric acid is jetted on reaction material for reaction, and the technological conditions of the reaction are controlled. Thus, the feed-grade calcium hydrophosphate can be generated by the reaction. When compound fertilizer needs to be produced, the technological process of the present invention is converted into a technological process for producing compound fertilizer with an NPK compound fertilizer producing method. Because two kinds of products can be produced by a set of devices, the cost is reduced, and the economic benefit is obviously increased. The technology is suitable for an NPK compound fertilizer device for developing new products, and is also suitable for establishing a set of new producing devices.
Description
The invention belongs to a kind of phosphoric acid by wet process and produce the method for calcium hydrophosphate fodder.
At present, with the phosphoric acid by wet process is the raw material production calcium hydrophosphate fodder, the liquid phase flow process that adopts two sections neutralising phosphoric acids of milk of lime is arranged, the dry method flow process that phosphoric acid and calcium carbonate reaction are also arranged all will be built a cover production equipment in addition, and 93110897.7 1 kinds of methods of producing calcium hydrogen phosphate fodder of patent, be to adopt the basis of two sections neutralisations of milk of lime and set up a pretreatment process, not only set up device, improved cost simultaneously, very uneconomical.
The purpose of this invention is to provide a kind of phosphoric acid by wet process and produce the method for calcium hydrophosphate fodder, promptly be in original composite fertilizer production equipment, set up a special reaction device, with concentration is 42% purifying phosphoric acid (through defluorinate, removing heavy metals) and content is that lime carbonate more than 97% is made raw material, produce calcium hydrophosphate fodder, while is production composite fertilizer also, reaches the purpose that a covering device is produced two kinds of products, the also suitable cover secondary calcium phosphate new production device of building of the present invention.
The present invention is in composite fertilizer's production equipment, increases a reactor, purifying phosphoric acid is ejected on the reaction mass reacts, and generates calcium hydrophosphate fodder, in composite fertilizer's preorder production equipment (1), with purity % 〉=97, F%=0.075, heavy metal P
2 b+ %＜0.001 lime carbonate mixes with the returning charge that comes from composite fertilizer's postorder production equipment (4), adds in the secondary calcium phosphate reactor (2), comes from the P of composite fertilizer's preorder production equipment (1)
2O
5%=38～43, F%=0.13, heavy metal P
2 bThe purifying phosphoric acid of+%＜0.002 is ejected on the reaction mass and reacts, reaction time 30～60 seconds, and returning charge: product: 1～4: 1, CaO/P
2O
5(ore deposit acid ratio): 0.77～0.84, temperature of reaction: 30～70 ℃, make reaction generate secondary calcium phosphate, the slip that comes out is sent to composite fertilizer's postorder device processes, obtains calcium hydrophosphate fodder.When need production composite fertilizer, switch to the technical process of composite fertilizer, press the method production of NPK composite fertilizer.
The present invention is in former composite fertilizer production equipment, increase a reactor, with purifying phosphoric acid be ejected into returning charge blended material on react, the processing condition of control reaction just can be reacted the secondary calcium phosphate that generates feed grade, when needs production composite fertilizer, switch to the compound fertilizer technology flow process, press the method production of NPK composite fertilizer, a set of equipment is produced two kinds of products, and cost is low; Remarkable in economical benefits adapts to the NPK compound fertilizer facility usefulness of developing new product.
Description of drawings:
Fig. 1 is a flow diagram of the present invention.
The present invention increases a reactor in former composite fertilizer production equipment, when need are produced secondary calcium phosphate, switch to the technology circuit of producing secondary calcium phosphate, with purity % 〉=97, F%=0.075, heavy metal P
2 bIn the lime carbonate of+%＜0.001 and the composite fertilizer's postorder production equipment, P
2O
5%=42.3, F%=0.12, Ca%=23.6, heavy metal P
2 bThe returning charge of+%＜0.002 (secondary calcium phosphate) mixes and adds in the reactor P
2O
5%=38～43, F%=0.13, heavy metal P
2 B+The purifying phosphoric acid of %＜0.002 is ejected on the reaction mass and reacts, reaction time 40～50 seconds, returning charge: product preferably 2: 1, CaO/P
2O
5(ore deposit acid than) preferably 0.80, preferably 40 ℃ of temperature of reaction are sent to drying from the work in-process that reactor comes out, by analyzing work in-process free acid and carbonic acid gas, the transformation efficiency of assaying reaction.When needs production composite fertilizer, switch to the technical process of composite fertilizer, press the method production of NPK composite fertilizer, a set of equipment is produced two kinds of products, and cost is low, and suitable NPK compound fertilizer facility is developed new product, and also can suit to build a cover new production device.
Claims (1)
1, a kind of phosphoric acid by wet process is produced the method for calcium hydrophosphate fodder, be in composite fertilizer's production equipment, increase a reactor, purifying phosphoric acid is ejected on the reaction mass reacts, generate calcium hydrophosphate fodder, it is characterized in that: purity % 〉=97, F%=0.075, heavy metal P
2 b+ %＜0.001 lime carbonate mixes with the returning charge that comes from composite fertilizer's postorder production equipment (4), adds in the secondary calcium phosphate reactor (2), comes from the P of composite fertilizer's preorder production equipment (1)
2O
5%=38～43, F%=0.13, heavy metal P
2 bThe purifying phosphoric acid of+%＜0.002 is ejected on the reaction mass and reacts, reaction time 30～60 seconds, and returning charge: product: 1～4: 1, CaO/P
2O
5(ore deposit acid ratio): 0.77～0.84, temperature of reaction: 30～70 ℃, make reaction generate secondary calcium phosphate, the slip that comes out is sent to composite fertilizer's postorder device processes, obtains calcium hydrophosphate fodder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95105662A CN1063313C (en) | 1995-06-26 | 1995-06-26 | Wet process for producing calcium hydrophosphate as fodder from phosphoric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95105662A CN1063313C (en) | 1995-06-26 | 1995-06-26 | Wet process for producing calcium hydrophosphate as fodder from phosphoric acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1123616A CN1123616A (en) | 1996-06-05 |
| CN1063313C true CN1063313C (en) | 2001-03-21 |
Family
ID=5075564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95105662A Expired - Fee Related CN1063313C (en) | 1995-06-26 | 1995-06-26 | Wet process for producing calcium hydrophosphate as fodder from phosphoric acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1063313C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701171B (en) * | 2012-06-21 | 2014-03-19 | 中化云龙有限公司 | Production method of feed-grade granular calcium hydrogen phosphate III-type product |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091392A (en) * | 1993-02-25 | 1994-08-31 | 张小平 | A kind of method of producing calcium hydrogen phosphate fodder |
-
1995
- 1995-06-26 CN CN95105662A patent/CN1063313C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091392A (en) * | 1993-02-25 | 1994-08-31 | 张小平 | A kind of method of producing calcium hydrogen phosphate fodder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1123616A (en) | 1996-06-05 |
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| C14 | Grant of patent or utility model | ||
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |