CN105417516A - Production method for feed-grade monocalcium phosphate - Google Patents
Production method for feed-grade monocalcium phosphate Download PDFInfo
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- CN105417516A CN105417516A CN201510952371.4A CN201510952371A CN105417516A CN 105417516 A CN105417516 A CN 105417516A CN 201510952371 A CN201510952371 A CN 201510952371A CN 105417516 A CN105417516 A CN 105417516A
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- slip
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- phosphoric acid
- monocalcium phosphate
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/32—Phosphates of magnesium, calcium, strontium, or barium
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Abstract
The invention discloses a production method for feed-grade monocalcium phosphate. The method comprises the following steps: (1) preparation of a phosphoric acid raw material; (2) slurrying of a calcium carbonate raw material; (3) first order reaction; (4) second order reaction; (5) spray drying and cylinder drying of slurry; (6) crushing and screening; (7) cooling and packaging to obtain the product. Compared with the existing technology, the production method disclosed by the invention has the following advantages: (1) a curing procedure in an original process is omitted, and the production time is greatly shortened; (2) the area of a used production site is greatly reduced, and the construction investment is saved; (3) the process is easy to control and simple to operate; (4) the product accords with a quality requirement of a feed product. The production method is applicable to producing the feed-grade monocalcium phosphate product.
Description
Technical field
The present invention relates to phosphoric acid salt, particularly relate to the phosphoric acid salt of calcium, furthermore relate to feed-level calcium biphosphate, also relate to its production method.
Background technology
The principal item of feed-grade calcium phosphate salt has tricalcium phosphate, secondary calcium phosphate, monocalcium phosphate, all belongs to mineral element nutritive additive.Wherein, monocalcium phosphate (MCP) is a kind of excellent high efficiency phosphatic feed additive, and phosphorous height, water-soluble rate is high, is widely used in the fodder additives of aquatic animal and livestock and poultry cultivation animal.Because monocalcium phosphate water-soluble phosphorus content is higher, content accounts for more than total phosphorus 90wt%, and be conducive to the absorption of aquatic animal to calcium phosphorus, digestibility is more than 90%, and excretion is few, is conducive to the features such as environment protection.At home and abroad find broad application.
The production of feed-level calcium biphosphate mainly takes wet phosphoric acid purifying to concentrate afterwards and calcium salt reacts, and obtains finished product through processes such as slaking, pulverizing, oven dry.The patent application relating to feed-level calcium biphosphate has 20, phosphoric acid and calcium carbonate reaction has No. ZL2012102063256 " method of Wet-process Phosphoric Acid Production feed-level calcium biphosphate " in a wet process, system's employing phosphorus concentrate extracts dilute phosphoric acid, concentrated acquisition strong phosphoric acid, removal of impurities obtain purifying phosphoric acid, generate slip with calcium carbonate through two-stage reaction again, drying, slaking obtain mash feed level calcium biphosphate finished product; Undelegated in addition have No. 01107387X " a kind of method of lower concentration Wet-process Phosphoric Acid Production feed-level calcium biphosphate ", No. 011072059 " new feed-level calcium biphosphate and the production method of high-phosphorus products ", No. 2012102063256 " method of Wet-process Phosphoric Acid Production feed-level calcium biphosphate ", No. 2014102474939 " methods of dry production feed-level calcium biphosphate " and No. 2015100043092 " a kind of methods of producing feed-level calcium biphosphate " etc.
These techniques all need enough curing times, and the construction of device is taken up an area inevitable comparatively large, and equipment investment is higher, and unstable product quality.
Summary of the invention
The present invention aims to provide a kind of new feed-level calcium biphosphate production method that can reduce the product curing time, can ensure quality product simultaneously, to overcome the defect of prior art.
The feed-level calcium biphosphate production method that contriver provides mainly comprises following operation:
(1) preparation of raw material phosphoric acid
By the conventionally defluorinate of raw material phosphoric acid, dearsenification, for subsequent use after reaching processing requirement;
(2) oxide spinel calcium slurrying
Oxide spinel calcium (abbreviation calcium powder) is mixed with water in groove with slurry, makes calcium powder slip, for subsequent use;
(3) first order reaction
The phosphoric acid and calcium powder slip that meet processing requirement are sent in first order reaction groove and carry out neutralization reaction, most of phosphoric acid and calcium powder react and become monocalcium phosphate, and after the slip that stirs, slip pump is extracted out and is sent to second order reaction groove;
(4) second order reaction
Slip after first order reaction proceeds neutralization reaction at second order reaction groove; Most phosphoric acid and calcium powder are reacted and becomes monocalcium phosphate, stir, extract out with pump after slip reaches predetermined technic index and be sent to dehumidification system;
(5) slip is dry
The slip meeting technic index requirement first carries out spraying dry with spray-dryer, and then carry out drying with cylindrical drier, after reaching drought index, fragmentation sent to by dry powder;
(6) crushing and screening
With the dry powder crusher in crushing of block, send into sieve apparatus and sieve, screen underflow is that qualified powder is monocalcium phosphate work in-process, and it is again broken that screen overflow then returns crusher;
(7) cooling packing
Monocalcium phosphate work in-process cool through cooler, obtain monocalcium phosphate finished product, and through inspection, salable product packaging becomes feed-level calcium biphosphate product.
In aforesaid method (1) step, the massfraction of described phosphoric acid by wet process is (with P
2o
5meter) be 40% ~ 50%.
In aforesaid method (2) step, in described oxide spinel calcium, calcium carbonate massfraction is more than 98%; The massfraction of described calcium powder slip is 40% ~ 55%.
In aforesaid method (3) step, described neutralization reaction temperature controls at 40 DEG C ~ 60 DEG C.
In aforesaid method (4) step, described neutralization reaction temperature controls at 75 DEG C ~ 95 DEG C; The described reaction times controls at 4h ± 0.5h.
In aforesaid method (5) step, described drought index is dry powder water content and moisture massfraction is 6% ~ 8%.
The present invention has the following advantages compared with the prior art: the curing step 1. eliminating original technique, and the production time shortens greatly; 2. the production site area used greatly reduces, and saves construction investment; 3. technology controlling and process is easy, simple to operate; 4. product meets feeds product specification of quality.Be applicable to produce feed-level calcium biphosphate product.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, as follows to the detailed description of the invention:
Embodiment
First by massfraction (with P
2o
5meter) be 40% ~ 50% the conventionally defluorinate of raw material phosphoric acid, dearsenification, for subsequent use after reaching processing requirement; Mixed in groove with slurry with water by the oxide spinel calcium of massfraction more than 98% again, making massfraction is 50% calcium powder slip, for subsequent use;
The phosphoric acid and calcium powder slip that meet processing requirement are sent in first order reaction groove and carry out neutralization reaction, temperature controls to react at 40 DEG C ~ 60 DEG C most of phosphoric acid and calcium powder to become monocalcium phosphate, and after the slip that stirs, slip pump is extracted out and is sent to second order reaction groove; Slip proceeds neutralization reaction at second order reaction groove, temperature controls at 75 DEG C ~ 95 DEG C, and most phosphoric acid and calcium powder are reacted becomes monocalcium phosphate, stirs, reaction times controls at 4h, extracts out be sent to dehumidification system after slip reaches predetermined technic index with pump; Slip first carries out spraying dry with spray-dryer, then carries out drum dried with drum dryer, and after reaching drought index, the moisture massfraction of dry powder is 6% ~ 8%, sends to fragmentation; With the dry powder crusher in crushing of block, cross sieve apparatus, screen underflow is that qualified powder is monocalcium phosphate work in-process, and it is again broken that screen overflow then returns crusher; Monocalcium phosphate work in-process obtain monocalcium phosphate finished product after overcooling, and through inspection, salable product packaging becomes feed-level calcium biphosphate product.
Claims (6)
1. feed-level calcium biphosphate production method, is characterized in that mainly comprising following operation:
(1) preparation of raw material phosphoric acid
By the conventionally defluorinate of raw material phosphoric acid, dearsenification, for subsequent use after reaching processing requirement;
(2) oxide spinel calcium slurrying
Oxide spinel calcium is mixed with water in groove with slurry, makes Paris white slip, for subsequent use;
(3) first order reaction
The phosphoric acid and Paris white slip that meet processing requirement are sent in first order reaction groove and carry out neutralization reaction, most of phosphoric acid and Paris white react and become monocalcium phosphate, and after the slip that stirs, slip pump is extracted out and is sent to second order reaction groove;
(4) second order reaction
Slip after first order reaction proceeds neutralization reaction at second order reaction groove; Most phosphoric acid and Paris white are reacted and becomes monocalcium phosphate, stir, extract out with pump after slip reaches predetermined technic index and be sent to dehumidification system;
(5) slip is dry
The slip meeting technic index requirement first carries out spraying dry with spray-dryer, and then carry out drum dried with drum dryer, after reaching drought index, fragmentation sent to by dry powder;
(6) crushing and screening
With the dry powder crusher in crushing of block, sieve, screen underflow is that qualified powder is monocalcium phosphate work in-process, and it is again broken that screen overflow then returns crusher;
(7) cooling packing
Monocalcium phosphate work in-process cool through cooler, obtain monocalcium phosphate finished product, and through inspection, salable product packaging becomes feed-level calcium biphosphate product.
2. production method as claimed in claim 1, is characterized in that, in (1) step, described phosphoric acid by wet process is with P
2o
5the massfraction of meter is 40% ~ 50%.
3. production method as claimed in claim 1, it is characterized in that in (2) step, in described oxide spinel calcium, calcium carbonate massfraction is more than 98%; The massfraction of described Paris white slip is 40% ~ 55%.
4. production method as claimed in claim 1, it is characterized in that in (3) step, described neutralization reaction temperature controls at 40 DEG C ~ 60 DEG C.
5. production method as claimed in claim 1, it is characterized in that in (4) step, described neutralization reaction temperature controls at 75 DEG C ~ 95 DEG C; The described reaction times controls at 4h ± 0.5h.
6. production method as claimed in claim 1, is characterized in that in (5) step, and to be dry powder water content and moisture massfraction be described drought index
6% ~ 8%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510952371.4A CN105417516A (en) | 2015-12-18 | 2015-12-18 | Production method for feed-grade monocalcium phosphate |
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|---|---|---|---|
| CN201510952371.4A CN105417516A (en) | 2015-12-18 | 2015-12-18 | Production method for feed-grade monocalcium phosphate |
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| CN105417516A true CN105417516A (en) | 2016-03-23 |
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| CN201510952371.4A Pending CN105417516A (en) | 2015-12-18 | 2015-12-18 | Production method for feed-grade monocalcium phosphate |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106111532A (en) * | 2016-06-28 | 2016-11-16 | 四川省汉源化工总厂 | A kind of stage division of feed-level calcium biphosphate |
| CN106115643A (en) * | 2016-06-24 | 2016-11-16 | 中化化肥有限公司成都研发中心 | A kind of technique utilizing boiler slag purification of wet process phosphoric acid to produce high-efficiency feed level calcium biphosphate |
| CN107344715A (en) * | 2017-07-13 | 2017-11-14 | 贵州川恒化工股份有限公司 | The production method of feed-level calcium biphosphate |
| CN110862074A (en) * | 2019-12-18 | 2020-03-06 | 瓮福（集团）有限责任公司 | Preparation method for producing calcium dihydrogen phosphate slurry by wet-process phosphoric acid slurry method |
| CN113401885A (en) * | 2021-07-06 | 2021-09-17 | 连云港树人科创食品添加剂有限公司 | Preparation method of large-particle monocalcium phosphate |
| CN115057420A (en) * | 2022-01-17 | 2022-09-16 | 贵州长泰源纳米钙业科技有限公司 | Production and processing technology of monocalcium phosphate |
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| CN1371862A (en) * | 2001-02-28 | 2002-10-02 | 四川大学 | Method for producing calcium hydrogen phosphate fodder |
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| CN103864043A (en) * | 2014-04-04 | 2014-06-18 | 中化云龙有限公司 | Method for co-producing feed-grade calcium phosphate and monopotassium phosphate by defluorinated wet- process on phosphoric acid |
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| CN104016327A (en) * | 2014-06-06 | 2014-09-03 | 中化云龙有限公司 | Method for producing feed-grade monocalcium phosphate by dry method |
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| CN1371862A (en) * | 2001-02-28 | 2002-10-02 | 四川大学 | Method for producing calcium hydrogen phosphate fodder |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106115643A (en) * | 2016-06-24 | 2016-11-16 | 中化化肥有限公司成都研发中心 | A kind of technique utilizing boiler slag purification of wet process phosphoric acid to produce high-efficiency feed level calcium biphosphate |
| CN106115643B (en) * | 2016-06-24 | 2018-05-18 | 中化化肥有限公司成都研发中心 | A kind of technique using boiler slag purification of wet process phosphoric acid production feed-level calcium biphosphate |
| CN106111532A (en) * | 2016-06-28 | 2016-11-16 | 四川省汉源化工总厂 | A kind of stage division of feed-level calcium biphosphate |
| CN107344715A (en) * | 2017-07-13 | 2017-11-14 | 贵州川恒化工股份有限公司 | The production method of feed-level calcium biphosphate |
| CN107344715B (en) * | 2017-07-13 | 2019-07-05 | 贵州川恒化工股份有限公司 | The production method of feed-level calcium biphosphate |
| CN110862074A (en) * | 2019-12-18 | 2020-03-06 | 瓮福（集团）有限责任公司 | Preparation method for producing calcium dihydrogen phosphate slurry by wet-process phosphoric acid slurry method |
| CN113401885A (en) * | 2021-07-06 | 2021-09-17 | 连云港树人科创食品添加剂有限公司 | Preparation method of large-particle monocalcium phosphate |
| CN113401885B (en) * | 2021-07-06 | 2022-09-16 | 连云港树人科创食品添加剂有限公司 | Preparation method of large-particle monocalcium phosphate |
| CN115057420A (en) * | 2022-01-17 | 2022-09-16 | 贵州长泰源纳米钙业科技有限公司 | Production and processing technology of monocalcium phosphate |
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Application publication date: 20160323 |