CN101774827B - Preparation method of ammonium phosphate anti-caking - Google Patents
Preparation method of ammonium phosphate anti-caking Download PDFInfo
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- CN101774827B CN101774827B CN201010102192A CN201010102192A CN101774827B CN 101774827 B CN101774827 B CN 101774827B CN 201010102192 A CN201010102192 A CN 201010102192A CN 201010102192 A CN201010102192 A CN 201010102192A CN 101774827 B CN101774827 B CN 101774827B
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- ammonium phosphate
- phosphoric acid
- cinder
- storage tank
- pyrite
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Abstract
The invention relates to a preparation method of ammonium phosphate anti-caking, which adopts cinder generated in the process of producing sulfuric acid by pyrite ore as an anti-caking agent and comprises the following steps of: firstly, grinding pyrite ore cinder into fine powder; then adding the fine cinder powder to a storage tank of dilute phosphoric acid which is the raw material for producing ammonium phosphate to improve the viscosity of a slurry; evenly stirring by a stirrer in the storage tank; then conveying to a neutral reactor by a pump, and reacting phosphoric acid with ammonium in the reactor; and finally, concentrating and drying the neutral slurry by using a conventional technology to prepare a qualified ammonium phosphate product which is not caked basically. The content of Fe3O4 in the pyrite ore cinder is 45-52 percent, and the ratio of the pyrite ore cinder added to the dilute phosphoric acid is controlled at 3-10 percent. The method has the advantages of: (1) improving the viscosity of the slurry and preventing the ammonium phosphate product from being caked; (2) reducing the pollution of the pyrite ore cinder on the environment and the treating pressure; and (3) improving the structure of applied soil to be beneficial to the growth of crops. The invention is suitable for enterprises of producing the ammonium phosphate products by self-made sulfuric acid.
Description
[technical field]
The present invention relates to phosphate fertilizer, also relate to sulfuric acid, in particular to utilizing pyrite cinder to prevent the method for ammonium phosphate fertilizers caking.
[background technology]
Ammonium phosphate is one of main fertilizer of modern agriculture and forestry, and ammonium phosphate typically refers to monoammonium phosphate and diammonium phosphate, is called for short the phosphorus ammonium.The ammonium phosphate physical properties difference that different material is produced is bigger: the Rock Phosphate (72Min BPL) that has can be produced the ammonium phosphate of high nutrient, have can only production at the bottom of nutrient ammonium phosphate; It is little that the Rock Phosphate (72Min BPL) that has is produced ammonium phosphate product degree of agglomeration, and the Rock Phosphate (72Min BPL) production ammonium phosphate degree of agglomeration that has is comparatively serious.And ammonium phosphate lumps and extremely is inconvenient to use.At present, there is producer directly in product, to add anti-hard caking agent, hope to solve the fertilizer agglomeration problem, but this can causes damage to belt conveyor, like belt elongation, slipping of belt etc.The patented technology that prevents ammonium phosphate product caking is few, and " method of preventing ammonium phosphate product from caking " application part of Wengfu Group Co., Ltd.'s application is only arranged at present, and the anti-hard caking agent of use is organism such as liquid n-Hexadecane, paraffin.
Roasting pyrite prepares the burning slag that produces in the vitriolic process, its most major ingredients be Fe
3O
4, contain metallic elements such as Fe, Pb, Zn, Al.Pyrite cinder is the solid slag of sulfuric acid industry discharging, environment is had the pollution of a bit.Though people have explored the Technology of some these waste residues of comprehensive utilization, also have some to utilize this slag roasting patented technology, up to now, still useless pyrite cinder is made the patented claim part of phosphorus ammonium anti-hard caking agent.
[summary of the invention]
The object of the invention just provides a kind of method of ammonium phosphate anti-caking, to solve the agglomeration problems of ammonium phosphate fertilizers, reduces the pollution of pyrite cinder to environment simultaneously.
The contriver is through exploring and test; The method of a kind of ammonium phosphate anti-caking that provides is to adopt the burning slag that produces in the production of sulfur from pyrite acid process as anti-hard caking agent; The concrete practice is: earlier pyrite cinder is worn into fine powder; To burn the slag fine powder again and join among the ammonium phosphate raw materials for production dilute phosphoric acid storage tank, improve the slip stickiness; In storage tank, mix with whisking appliance, then with pump delivery to neutralization reactor, phosphoric acid and ammonia react in reactor drum, at last with routine techniques in slip concentrate, drying, process qualified monoammonium phosphate product and do not lump basically.
The staple Fe of above-mentioned pyrite cinder
3O
4Massfraction be 45%～52%; The powder particle size that pyrite cinder is worn into is 0.01mm～1.0mm, and the ratio control that fine powder joins dilute phosphoric acid is 3%～10%.
The massfraction of above-mentioned raw materials dilute phosphoric acid is 21%～30%.
Above-mentioned phosphoric acid adopts the continuously stirring mode to mix in storage tank with pyrite cinder.
Phosphoric acid and ammonia react are rapid, accomplish in generally in several seconds.
Method provided by the invention has following advantage: improve the slip stickiness in (1) pyrite cinder adding phosphoric acid, improve preventing ammonium phosphate product from caking; (2) reduce pollution and the processing pressure of pyrite cinder accordingly to environment; (3) mix pyrite cinder and can improve the structure of using soil, help crop growth.Be applicable to the enterprise of self-produced gas washing in SA production ammonium phosphate product.
[description of drawings]
Accompanying drawing is the schematic flow sheet of method provided by the invention.Among the figure, 1 is the dilute phosphoric acid storage tank, and 2 is whisking appliance, and 3 is the phosphoric acid under meter, and 4 is the ammonia flow meter, and 5 is neutralization reactor, and 6 is concentration and drying equipment.
[embodiment]
Embodiment
The present invention is applied in urn good fortune phosphate fertilizer plant of urn good fortune (group) ltd, and the pyrite cinder that 800,000 tons of/year pyrite-based sulfuric acid production devices are produced partly is used among 360,000 tons of/year MAP Plant, and is respond well.
The data of analyzing pyrite cinder with on October 20th, 2009 are following:
Earlier pyrite cinder is worn into the fine powder that granularity is 0.01mm～1.0mm; Again in phosphorus ammonium production equipment; Joining the ammonium phosphate raw materials for production with burning the ratio of slag fine powder according to 10%---massfraction is that add-on is controlled at 5t/h among 25% the dilute phosphoric acid storage tank, and phosphoric acid amount is 50m
3/ h improves the slip stickiness; In storage tank, stir continuously stirring with whisking appliance, mix the back with pump delivery to neutralization reactor, phosphoric acid and ammonia accomplish to react in several seconds in reactor drum, at last with routine techniques in and slip concentrates, drying, process qualified monoammonium phosphate product.
The product caking situation of producing is as follows:
Claims (3)
1. the method for an ammonium phosphate anti-caking; It is characterized in that this method is to adopt the burning slag that produces in the production of sulfur from pyrite acid process as anti-hard caking agent; The concrete practice is: earlier pyrite cinder is worn into fine powder; To burn the slag fine powder again and join among the ammonium phosphate raw materials for production dilute phosphoric acid storage tank, improve the slip stickiness; In storage tank, mix with whisking appliance, then with pump delivery to neutralization reactor, phosphoric acid and ammonia react in reactor drum, at last with routine techniques in slip concentrate, drying, process qualified monoammonium phosphate product;
The staple Fe of said pyrite cinder
3O
4Massfraction be 45%～52%; The powder particle size that pyrite cinder is worn into is 0.01mm～1.0mm; The ratio control that fine powder joins dilute phosphoric acid is 3%～10%.
2. according to the described method of claim 1, the massfraction that it is characterized in that said raw material dilute phosphoric acid is 21%～30%.
3. according to the described method of claim 1, it is characterized in that said phosphoric acid and pyrite cinder adopt the continuously stirring mode to mix in storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010102192A CN101774827B (en) | 2010-01-28 | 2010-01-28 | Preparation method of ammonium phosphate anti-caking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010102192A CN101774827B (en) | 2010-01-28 | 2010-01-28 | Preparation method of ammonium phosphate anti-caking |
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| Publication Number | Publication Date |
|---|---|
| CN101774827A CN101774827A (en) | 2010-07-14 |
| CN101774827B true CN101774827B (en) | 2012-10-03 |
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ID=42511447
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010102192A Active CN101774827B (en) | 2010-01-28 | 2010-01-28 | Preparation method of ammonium phosphate anti-caking |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001883B (en) * | 2010-10-26 | 2013-05-22 | 瓮福（集团）有限责任公司 | Method for using sulfates as ammonium phosphate anticaking agent |
| CN102126888A (en) * | 2010-12-29 | 2011-07-20 | 瓮福（集团）有限责任公司 | Method for adding monoammonium phosphate anti-blocking agent |
| CN107056367A (en) * | 2016-12-31 | 2017-08-18 | 新昌县迪斯曼科技有限公司 | Make the method for ammonium phosphate anti-caking agent with sulfate |
| CN107746323A (en) * | 2017-10-24 | 2018-03-02 | 贵州大学 | A kind of MAP anticaking agent method of slurry process generation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1118445C (en) * | 2000-02-01 | 2003-08-20 | 江西贵溪化肥厂 | Process for producing compound diammonium hydrogen phosphate fertilizer |
| CN100383089C (en) * | 2005-09-01 | 2008-04-23 | 刘天暘 | Coloured phosphorus ammonium fertilizer production method and its dying wrapping agent |
-
2010
- 2010-01-28 CN CN201010102192A patent/CN101774827B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1118445C (en) * | 2000-02-01 | 2003-08-20 | 江西贵溪化肥厂 | Process for producing compound diammonium hydrogen phosphate fertilizer |
| CN100383089C (en) * | 2005-09-01 | 2008-04-23 | 刘天暘 | Coloured phosphorus ammonium fertilizer production method and its dying wrapping agent |
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| CN101774827A (en) | 2010-07-14 |
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Address after: 550500 Guizhou Province, Qiannan Buyei and Miao Autonomous Prefecture Fuquan Racecourse town Yingbin Road No. 1 Wengfu group Patentee after: WENGFU GROUP Co.,Ltd. Address before: 23, 550002 floor, International Building, No. 57, South City Road, Nanming District, Guiyang, Guizhou Patentee before: WENGFU GROUP Co.,Ltd. |