CN106831002A - A kind of granular double superhosphate energy-saving production method - Google Patents
A kind of granular double superhosphate energy-saving production method Download PDFInfo
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- CN106831002A CN106831002A CN201710040805.2A CN201710040805A CN106831002A CN 106831002 A CN106831002 A CN 106831002A CN 201710040805 A CN201710040805 A CN 201710040805A CN 106831002 A CN106831002 A CN 106831002A
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- comminutor
- slurry
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- moisture
- phosphorus pentoxide
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B1/00—Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
- C05B1/04—Double-superphosphate; Triple-superphosphate; Other fertilisers based essentially on monocalcium phosphate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
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Abstract
A kind of granular double superhosphate energy-saving production method, using following technological process：1), the phosphoric acid hybrid reaction of the phosphorus pentoxide with the ground phosphate rock of the active of the phosphorus pentoxide containing certain mass and by concentrating；2), reacted fresh calcium slurry is melted into by belt, in curing warehouse turning curing, then enters comminutor；3), the returning charge amount of chemical conversion granulation and the fresh fertilizer amount for entering comminutor are comminutor inventory 40~55%, 4), with shurry pump comminutor is sprayed into by shotcrete pipe again；5), the straying quatity of slurry is the 20~40% of fresh calcium addition, and comminutor moisture content of outlet is 9~12%；6) material for, going out comminutor passes through drying, screening, the cooling of qualified particle, coating, metering, packaging and storage, the beneficial effects of the invention are as follows：The energy consumption of partially desiccated press filtration miberal powder and the steam consumption of concentrated phosphoric acid have been saved, the ROA of device has been improve；Can be required according to client and sale, adjust product quality；Balling ratio is higher, and particle is more mellow and fuller.
Description
Technical field
The present invention is that the two methods of main production coarse whiting are combined, the section based on den process, supplemented by slurry process
About the production method of the energy, belongs to phosphorus compound fertilizer manufacture field.
Technical background
The granular coarse whiting main production process of production has two kinds now：Den process and slurry process.The production technology of den process：
It is material to mix initial reaction in mixer with denseer phosphoric acid (phosphorus pentoxide mass content 45-54%) and drying phosphate rock powder
Slurry, slurry enters curing warehouse after curing in the chemical conversion machine, the product after curing can also be by after screening with direct marketing
Into granulator granulation, it is Nian Jie that the cooked product after screening need to add appropriate water to form liquid phase together with returning charge into comminutor
Agent.Constantly upset is rolled material in comminutor, is bonded the particle and then warp for being agglomerated into the size that meets the requirements mutually by little particle
Dry, cooling, screening, coating are crossed, qualified products are packed to obtain.Den process is bad mainly for reactivity, grade phosphorus not high
Ore deposit, the advantage of den process is wider to the adaptability of phosphorus ore, it is possible to use reactivity and phosphorus pentoxide content it is slightly lower two
Secondary phosphorus ore, because the reaction time is long, can obtain reaction resolution ratio higher, can also reduce returning charge amount.Have the disadvantage that needs are huge
Curing warehouse, in maturing process escape fluorine be difficult to reclaim.The production technology of slurry process：Phosphoric acid and phosphorus ore add series connection
Hybrid reaction is carried out in several reactive tanks, the slurry shurry pump of generation is sent to comminutor and directly granulated.The advantage of slurry process
Be available low concentration phosphoric acid, flow it is continuous, device is compact, and it is mellow and full to take up an area small, product, is easy to fertilising, process units flexibly,
It is easy to phosphorus ammonium of changing the line of production.The shortcoming of slurry process be need to phosphorus pentoxide higher and reactivity phosphorus ore, the returning charge amount of granulation is big, does
Dry load is big, and the production cost and output investment ratio den process of total comparing slurry process are slightly higher, and the production method of China's coarse whiting is most of
Using den process
The content of the invention
The present invention be directed to liquid phase moisture needed for the granulation of present den process, slurry process and den process are produced the production of coarse whiting
Technique is effectively combined.The coarse whiting produced with the slurry process mode of production is starched and is replaced tradition chemical conversion granulation spray tail by way of whitewashing
The mode of water or other clear water, to reach saving energy consumption, improves the purpose of yield.
The present invention is achieved through the following technical solutions.
A kind of granular double superhosphate energy-saving production method, feature of present invention is, using following technological process：
1), with active of the moisture within 2% after phosphorus pentoxide mass content 31.5~33%, drying
The phosphoric acid hybrid reaction of ground phosphate rock and the phosphorus pentoxide content content 43%~47% by concentrating；
2), reacted fresh calcium slurry is melted into by belt, in curing warehouse turning curing, after curing 15~30 days, is passed through
Add the mode of appropriate pulverized limestone or penetrating ash breast to adjust its free acid in fresh calcium and drop to 5~6%, moisture drops to 8~10%,
By Belt Conveying to feed bin after screening, then enter comminutor；
3), the returning charge amount of chemical conversion granulation and the fresh fertilizer amount for entering comminutor are comminutor inventory 40~55%, returning charge
Material moisture 1.0~3.0；
4), the liquid phase that granulation needs is aqueous 14~17% by the relatively high reaction activity after press filtration, phosphorus pentoxide
The miberal powder of mass content 33~35% reacts with not concentrated phosphorus pentoxide mass content 35~38% half water phosphoric acid in reactive tank,
1.8~2.2 hours reaction time, reacted slurry moisture 35~40%, then comminutor is sprayed into by shotcrete pipe with shurry pump；
5), the straying quatity of slurry is the 20~40% of fresh calcium addition, and comminutor moisture content of outlet is 9~12%；
6) material of comminutor, is gone out by being dried to Shui Fen≤3%, screening, the cooling of qualified particle, coating, metering, packaging
Storage, unqualified particle enters comminutor as returning charge after crushing.
Step 4 of the present invention) in the liquid phase that needs of granulation be to be not required to dry ground phosphate rock with not concentrated half with press filtration
Water phosphoric acid is reacted in reactive tank, reacted slurry, people's comminutor is sprayed by shotcrete pipe with shurry pump.
The present invention enter comminutor material be cured den process TSP semi-finished product, dry returning charge and reaction slurry.
The straying quatity of slurry of the present invention is by the fresh fertilizer amount into comminutor, fresh rich water point, returning charge amount, returning charge moisture, granulation
The optimum moisture of needs, and spray into the moisture content of reaction slurry.
Beneficial effect：
The present invention provide half water law phosphoric acid by wet process multistage in and production industrial monoammonium phosphate production method have it is following
Beneficial effect:
1 compares with den process water spray granulation, and the steam of the energy consumption and concentrated phosphoric acid of having saved partially desiccated press filtration miberal powder disappears
Consumption
2 compare with den process water spray granulation, and yield 15-25% can be improved with fresh calcium slurry granulation is sprayed, and improve the profit of device
Beneficial rate
3 compare with den process water spray granulation, can be required according to client and sale with the granulation of fresh calcium slurry is sprayed, and adjust product
Quality
4 compare with den process water spray granulation, and balling ratio is higher, and particle is more mellow and fuller.
5th, technology and operating personnel have been laid in for company produces agricultural MAP
Brief description of the drawings
Fig. 1 is present invention process flow chart.
Specific embodiment
(case study on implementation)
See Fig. 1, a kind of granular double superhosphate energy-saving production method, feature of present invention is, using following technological process：
1), with active of the moisture within 2% after phosphorus pentoxide mass content 31.5~33%, drying
The phosphoric acid hybrid reaction of ground phosphate rock and the phosphorus pentoxide content content 43%~47% by concentrating；
2), reacted fresh calcium slurry is melted into by belt, in curing warehouse turning curing, after curing 15~30 days, is passed through
Add the mode of appropriate pulverized limestone or penetrating ash breast to adjust its free acid in fresh calcium and drop to 5~6%, moisture drops to 8~10%,
By Belt Conveying to feed bin after screening, then enter comminutor；
3), the returning charge amount of chemical conversion granulation and the fresh fertilizer amount for entering comminutor are comminutor inventory 40~55%, returning charge
Material moisture 1.0~3.0；
4), the liquid phase that granulation needs is aqueous 14~17% by the relatively high reaction activity after press filtration, phosphorus pentoxide
The miberal powder of mass content 33~35% reacts with not concentrated phosphorus pentoxide mass content 35~38% half water phosphoric acid in reactive tank,
1.8~2.2 hours reaction time, reacted slurry moisture 35~40%, then comminutor is sprayed into by shotcrete pipe with shurry pump；
5), the straying quatity of slurry is the 20~40% of fresh calcium addition, and comminutor moisture content of outlet is 9~12%；
6) material of comminutor, is gone out by being dried to Shui Fen≤3%, screening, the cooling of qualified particle, coating, metering, packaging
Storage, unqualified particle enters comminutor as returning charge after crushing.
Step 4 of the present invention) in the liquid phase that needs of granulation be to be not required to dry ground phosphate rock with not concentrated half with press filtration
Water phosphoric acid is reacted in reactive tank, reacted slurry, people's comminutor is sprayed by shotcrete pipe with shurry pump.
The present invention enter comminutor material be cured den process TSP semi-finished product, dry returning charge and reaction slurry.
The straying quatity of slurry of the present invention is by the fresh fertilizer amount into comminutor, fresh rich water point, returning charge amount, returning charge moisture, granulation
The optimum moisture of needs, and spray into the moisture content of reaction slurry.
Yunnan company is undergone technological transformation on the basis of former 100kt/a den processes TSP plant with this method, is passed through
Increase a ground phosphate rock belt conveyor, miberal powder storage hopper and batcher, phosphoric acid preheater, coarse whiting reactive tank (2), shurry pump enters shotcrete pipe, and reaction end gas connect the simple installations and facilities such as former blender exhausting washing system just
Complete the transformation of slurry process refractory gunning equipment.Original sparge pipe is changed to spray grey breast regulation free acid, improved device ton is produced
Moral integrity about 10 kilograms of coal consumption, saves concentrated phosphoric acid afterheat steam and consumes 20 kilograms, improves the ton hour of yield 2.5, product quality
Double superhosphate national standard is fully achieved.
Claims (3)
1. a kind of granular double superhosphate energy-saving production method, it is characterized in that, using following technological process：
1), with the phosphorus ore of active of the moisture within 2% after phosphorus pentoxide mass content 31.5~33%, drying
The phosphoric acid hybrid reaction of powder and the phosphorus pentoxide content content 43%~47% by concentrating；
2), reacted fresh calcium slurry is melted into by belt, in curing warehouse turning curing, after curing 15~30 days, by fresh
Add the mode of appropriate pulverized limestone or penetrating ash breast to adjust its free acid in calcium and drop to 5~6%, moisture drops to 8~10%, screening
Afterwards by Belt Conveying to feed bin, then enter comminutor；
3), the returning charge amount of chemical conversion granulation and the fresh fertilizer amount for entering comminutor are comminutor inventory 40~55%, returning charge material
Moisture 1.0~3.0；
4), the liquid phase that granulation needs is aqueous 14~17% by the relatively high reaction activity after press filtration, phosphorus pentoxide quality
The miberal powder of content 33~35% reacts with not concentrated phosphorus pentoxide mass content 35~38% half water phosphoric acid in reactive tank, reaction
1.8~2.2 hours time, reacted slurry moisture 35~40%, then comminutor is sprayed into by shotcrete pipe with shurry pump；
5), the straying quatity of slurry is the 20~40% of fresh calcium addition, and comminutor moisture content of outlet is 9~12%；
6) material of comminutor, is gone out by being dried to Shui Fen≤3%, screening, the cooling of qualified particle, coating, measuring, be packaged into
Storehouse, unqualified particle enters comminutor as returning charge after crushing.
2. a kind of granular double superhosphate energy-saving production method according to claim 1, it is characterized in that, 4) in granulation need
Liquid phase be to be reacted in reactive tank with half not concentrated water phosphoric acid with the dry ground phosphate rock that is not required to of press filtration, reaction after
Slurry, with shurry pump by shotcrete pipe spray people's comminutor.
3. a kind of granular double superhosphate energy-saving production method according to claim 1, it is characterized in that, into comminutor
Material be cured den process TSP semi-finished product, dry returning charge and reaction slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710040805.2A CN106831002A (en) | 2017-01-20 | 2017-01-20 | A kind of granular double superhosphate energy-saving production method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710040805.2A CN106831002A (en) | 2017-01-20 | 2017-01-20 | A kind of granular double superhosphate energy-saving production method |
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| CN106831002A true CN106831002A (en) | 2017-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710040805.2A Pending CN106831002A (en) | 2017-01-20 | 2017-01-20 | A kind of granular double superhosphate energy-saving production method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111606739A (en) * | 2020-06-17 | 2020-09-01 | 云南磷化集团海口磷业有限公司 | Sulfur-containing enriched calcium superphosphate production device and preparation method |
| CN114307921A (en) * | 2021-12-15 | 2022-04-12 | 防城港盛农磷化有限公司 | Device and method for controlling slurry fluidity and curing efficiency |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101734950A (en) * | 2009-12-23 | 2010-06-16 | 瓮福（集团）有限责任公司 | Method for producing ammoniated triple superphosphate |
| CN103864042A (en) * | 2014-02-28 | 2014-06-18 | 昆明川金诺化工股份有限公司 | Method for lowering free acid of feed grade monocalcium phosphate |
| CN104828799A (en) * | 2014-02-12 | 2015-08-12 | 贵州川恒化工有限责任公司 | Process of producing feed-grade calcium dihydrogen phosphate through phosphoric acid circulation impurity removal method |
-
2017
- 2017-01-20 CN CN201710040805.2A patent/CN106831002A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101734950A (en) * | 2009-12-23 | 2010-06-16 | 瓮福（集团）有限责任公司 | Method for producing ammoniated triple superphosphate |
| CN104828799A (en) * | 2014-02-12 | 2015-08-12 | 贵州川恒化工有限责任公司 | Process of producing feed-grade calcium dihydrogen phosphate through phosphoric acid circulation impurity removal method |
| CN103864042A (en) * | 2014-02-28 | 2014-06-18 | 昆明川金诺化工股份有限公司 | Method for lowering free acid of feed grade monocalcium phosphate |
Non-Patent Citations (2)
| Title |
|---|
| 张宝林等: "重过磷酸钙", 《化工矿山技术》 * |
| 王荪权等: "国外普钙与重钙的技术动态", 《化肥工业》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111606739A (en) * | 2020-06-17 | 2020-09-01 | 云南磷化集团海口磷业有限公司 | Sulfur-containing enriched calcium superphosphate production device and preparation method |
| CN114307921A (en) * | 2021-12-15 | 2022-04-12 | 防城港盛农磷化有限公司 | Device and method for controlling slurry fluidity and curing efficiency |
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Application publication date: 20170613 |