CN1590285A - Preparation technology of granular feed grade calcium hydrogen phosphate - Google Patents
Preparation technology of granular feed grade calcium hydrogen phosphate Download PDFInfo
- Publication number
- CN1590285A CN1590285A CNA2004100268312A CN200410026831A CN1590285A CN 1590285 A CN1590285 A CN 1590285A CN A2004100268312 A CNA2004100268312 A CN A2004100268312A CN 200410026831 A CN200410026831 A CN 200410026831A CN 1590285 A CN1590285 A CN 1590285A
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- tablets press
- preparation technology
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- hydrogen phosphate
- sieve
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Abstract
A process for preparing the granular feed-class calcium hydrogen phosphate includes such steps as solidifying reaction between wet phosphoric acid and calcium carbonate slurry, mixing the solidified material with calcium hydrogen phosphate powder, dual-screw granulating, drying and sieving.
Description
Technical field
The invention belongs to a kind of granular fodder calcium hydrophosphate preparation technology.
Background technology
Secondary calcium phosphate is to raise indispensable mineral additive in the production.The calcium hydrophosphate fodder product all is a powdery at present, in the fodder production process, can form a large amount of dust when mixing secondary calcium phosphate, cause environmental pollution, powdered acid hydrogen calcium is mobile poor on the other hand, and feedstuff raw material mixes inhomogeneous, causes the feeds product part excessive, local a small amount of, influence the feed effect, simultaneously also because the secondary calcium phosphate dust overflows whitlockite substances content deficiency in the feed, fodder production producer must add secondary calcium phosphate in prescription, thereby production cost is improved.Some feed factory man calculates, if feed cost per ton increases by 1 yuan, for one 1,000,000 tons manufacturer, annual financial loss reaches 1,000,000 yuan.For adapting to the needs in market, granular fodder calcium hydrophosphate product also arises at the historic moment.The manufacturer of granular fodder calcium hydrophosphate seldom at present.Its production method is to utilize finished product powdered calcium hydrophosphate fodder to be pressed into sheet by roll-type, obtains granular through crusher in crushing and sifted branch again.It is poor to found product uniform particles degree, forms irregular multiple edge body, mobile poor.Simultaneously also owing to be that secondary processing causes cost higher.
Summary of the invention
The purpose of this invention is to provide a kind of granular fodder calcium hydrophosphate preparation technology, be cured reaction by phosphoric acid by wet process and lime carbonate slip, curing material and secondary calcium phosphate fine powder material are mixed into duplex and make machine and carry out bonding granulation, after the revolving drier drying, gradation sizing can get 20～40 purpose granular fodder calcium hydrophosphates, and granulating rate reaches more than 75%.
Technical solution of the present invention is:
The granular fodder calcium hydrophosphate is preparation technology comprise the following steps:
(1) phosphoric acid after the purification contains P
2O
5After % 〉=38, P/F 〉=110 are cured reaction with solid content 68%～72% lime carbonate slip, curing material mixes with powder from sack cleaner and broken sieve screening, siccative accounts for 12%～15%, the mixture moisture controlled is 18%～20%, enter tablets press again and carry out bonding granulation, tablets press is a twin-shaft screw-type, and turning direction is for rotating dorsad, and rotating speed is 200～300 rev/mins;
(2) material after making enters the whizzer drying, and the drying machine inlet temperature is 400～450 ℃, and temperature out is 68～75 ℃;
(3) dried material is by the sieve apparatus gradation sizing; by 40 purpose fineves; a part is as powder-like product; another part enters tablets press granulation again as returning charge; do not cross 20 purpose materials and enter crusher in crushing; get back to screening system after the fragmentation and sieve, product is got 20～40 purpose granular fodder calcium hydrophosphates, and it is spherical to be white in color.
Granulation of the present invention is even, for spherical, and good fluidity.In production system, only increase a tablets press and can finish granulated product production.Compare with the extruder grain method, less investment, tooling cost is low.Tooling cost is compared low 80 yuan per ton with extruder grain.
Description of drawings
Fig. 1 is a technological process block-diagram of the present invention.
Embodiment
The present invention once forms in the production process, non-secondary processing, and production cost is lower, and granulating equipment is the double-shaft spiral tablets press, the granulating rate height, granular rule is even, and outward appearance is that white is spherical, its good fluidity.The axle rotating speed that can regulate tablets press in the granulation process is produced the product of different-grain diameter, and market adaptability is stronger.Utilize the extruder grain method, facility investment is bigger, is equivalent to increase a system again; and prilling process of the present invention just increases a tablets press in production system; saved investment greatly, tooling cost also reduces a lot, about 80 yuan of the tooling costs that reduce per ton.For example implement with pilot plant, phosphoric acid contains P
2O
5After %=40.05, P/F=126 and solid content 70% lime carbonate slip are cured reaction; add granulation in the tablets press with per hour 138 kilograms flow and dry returning charge simultaneously with 25 kilograms flow per hour; this moment, granulating rate was 74%; material after the granulation enters and carries out drying in the whizzer; the drying machine inlet temperature is 400～450 ℃; temperature out is 68～75 ℃, and dry back material carries out classification and sieves, and getting 20～40 purpose granular fodder calcium hydrophosphates is product.Fines returns tablets press, and coarse fodder also returns tablets press through crusher in crushing.
Claims (2)
1, a kind of granular fodder calcium hydrophosphate preparation technology is characterized in that comprising the following steps:
(1) phosphoric acid after the purification contains P
2O
6After % 〉=38, P/F 〉=110 are cured reaction with solid content 68%～72% lime carbonate slip, curing material mixes with powder from sack cleaner and broken sieve screening, siccative accounts for 12%～15%, the mixture moisture controlled is 18%～20%, enter tablets press again and carry out bonding granulation, tablets press is a twin-shaft screw-type, and turning direction is for rotating dorsad, and rotating speed is 200～300 rev/mins;
(2) material after making enters the whizzer drying, and the drying machine inlet temperature is 400～450 ℃, and temperature out is 68～75 ℃;
(3) dried material is by the sieve apparatus gradation sizing; by 40 purpose fineves; a part is as powder-like product; another part enters tablets press granulation again as returning charge; do not cross 20 purpose materials and enter crusher in crushing; get back to screening system after the fragmentation and sieve, product is got 20～40 purpose granular fodder calcium hydrophosphates, and it is spherical to be white in color.
2, according to the described granular fodder calcium hydrophosphate of claim 1 preparation technology, it is characterized in that adopting the double-shaft spiral machine, the axle rotating speed that can regulate tablets press is produced the product of different-grain diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100268312A CN1590285A (en) | 2004-04-13 | 2004-04-13 | Preparation technology of granular feed grade calcium hydrogen phosphate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100268312A CN1590285A (en) | 2004-04-13 | 2004-04-13 | Preparation technology of granular feed grade calcium hydrogen phosphate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1590285A true CN1590285A (en) | 2005-03-09 |
Family
ID=34601271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100268312A Pending CN1590285A (en) | 2004-04-13 | 2004-04-13 | Preparation technology of granular feed grade calcium hydrogen phosphate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1590285A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101549862B (en) * | 2009-05-18 | 2011-08-10 | 中国—阿拉伯化肥有限公司 | A method for wet phosphoric acid producing high pure calcium hydrogen orthophosphate |
| CN112934439A (en) * | 2021-04-12 | 2021-06-11 | 云南磷化集团有限公司 | Improved crushing and screening system and method for granular feed calcium phosphate salt |
-
2004
- 2004-04-13 CN CNA2004100268312A patent/CN1590285A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101549862B (en) * | 2009-05-18 | 2011-08-10 | 中国—阿拉伯化肥有限公司 | A method for wet phosphoric acid producing high pure calcium hydrogen orthophosphate |
| CN112934439A (en) * | 2021-04-12 | 2021-06-11 | 云南磷化集团有限公司 | Improved crushing and screening system and method for granular feed calcium phosphate salt |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |