CN102336428B - Method for taking phosphogypsum under wet-process deslagging conditions - Google Patents
Method for taking phosphogypsum under wet-process deslagging conditions Download PDFInfo
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- CN102336428B CN102336428B CN 201110182472 CN201110182472A CN102336428B CN 102336428 B CN102336428 B CN 102336428B CN 201110182472 CN201110182472 CN 201110182472 CN 201110182472 A CN201110182472 A CN 201110182472A CN 102336428 B CN102336428 B CN 102336428B
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- phosphogypsum
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- swirler
- shale shaker
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Abstract
The invention discloses a method for taking phosphogypsum under wet-process deslagging conditions, which comprises the following steps: carrying out cyclone graded concentration on phosphogypsum slurry with a cyclone, and carrying out dehydration and dry stack on the phosphogypsum slurry with a high frequency vibrating screen. The method can effectively concentrate the thick phosphogypsum slurry to a solid content of 70%, thereby achieving the conditions for dry stack transportation. The water content of the filtered phosphogypsum is 30% or so, thereby being easy to implement dry stack and transportation. The transportation distance between the production device and the subsequent processing is short, thereby lowering the transportation cost by 3 yuan or so per ton of gypsum. The invention has wide market application prospects.
Description
Technical field
The invention belongs to the Wet-process Phosphoric Acid Production technical field, be specifically related to a kind of method of under wet method deslagging processing condition, taking phosphogypsum.
Background technology
The by product phosphogypsum of Wet-process Phosphoric Acid Production adopts dry cinder discharging and wet method deslagging dual mode usually when filtering end.Dry cinder discharging needs plant area that bigger ardealite storage yard turnover is arranged, and needs a large amount of vehicles during transportation, easily pollutes factory road and surrounding enviroment; And the stockyard then needs long belt transporting facility at off-site, and facility investment is high and be difficult to maintenance and management.The more important thing is, when gypsum toos many or too much for use or during rainy season, a large amount of gypsum can not in time be transported, and finally cause phosphoric acid production system to stop because of phosphogypsum piles with.Therefore large-lot producer all adopts wet method deslagging mode substantially now, be about to filter the phosphogypsum water that finishes and be mixed into the phosphogypsum slurry, be transported to phosphogypsum slag field by the phosphogypsum transferpump again, the phosphogypsum slurry is realized solid phase and water sepn after natural subsidence, the water retrieval system recycles, and the solid phosphogypsum is deposited in the slag field.
Along with improving constantly of requirement stored up to phosphogypsum by country, take the necessary link that phosphogypsum fully utilizes becomes production.In the prior art, take phosphogypsum under the wet method deslagging processing condition and mainly contain following several mode:
1, takes phosphogypsum in wet method deslagging phosphogypsum slag field
The slag field of wet method deslagging is all built in the remote mountain away from plant area usually, and the road that leads to the slag field is generally all narrower, and a small amount of engineering truck is by advancing by Ba Geng.If during in a large number from slag field roping phosphogypsum, have following problem: 1. the load-carrying vehicle of a large amount of roping phosphogypsums transports from the slag field and can only select road else, and there is unsafe hidden danger in great distance expense height; 2. slag field road is narrower steeper, and the road surface is more sliding during rainy season, can't the roping phosphogypsum, will influence comprehensive utilization of phosphogypsum; 3. phosphogypsum slag field is by " mine tailing storehouse emergency decree " requirement of State Administration of Quality and Technical Supervision's issue, to with slag storehouse (mine tailing storehouse) or when closing mine tailing storehouse, storehouse and carrying out back production and utilize, must engage has the unit of qualification to carry out technological demonstration, engineering design and safety evaluation.These problems have all greatly limited normally taking of phosphogypsum.
2, adopt filter plant to take phosphogypsum midway at the wet method deslagging
At the situation of taking the phosphogypsum inconvenience in the slag field, change in off-site wet method Residue extraction pipeline scope and to increase filter plant and take phosphogypsum, but newly-built filtering system need drop into a large amount of funds, need to build very big factory building, and the maintenance cost in later stage and working cost are higher.
In sum, all there are many problems in the mode of taking phosphogypsum under the existing wet method deslagging processing condition, causes phosphogypsum to utilize cost higher, and this is a technical barrier anxious to be solved in the phosphogypsum comprehensive utilization.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of method of taking phosphogypsum under wet method deslagging processing condition is provided,, reduce running cost and investment cost to simplify technical process.
Purpose of the present invention is achieved by following technical proposals.
Take the method for phosphogypsum under a kind of wet method deslagging condition, this method is taked following steps:
The phosphogypsum slurry of (1) the wet method Residue extraction pipeline being discharged is sent into the swirler group and is carried out eddy flow and concentrate, and the phosphogypsum slurry that swirler overflows enters the phosphogypsum storage tank, delivers to phosphogypsum slag field by deslagging pump again and stores up; After compiling, the phosphogypsum slurry that the swirler underflow comes out enters high frequency shale shaker;
(2) high frequency shale shaker is with the phosphogypsum slurry solid-liquid separation that enters, and undersized phosphogypsum slurry returns the phosphogypsum storage tank, delivers to phosphogypsum slag field by deslagging pump and stores up; Dried phosphogypsum on the sieve plate then is transported to interim stockyard by belt and stores up;
(3) the phosphogypsum comprehensive utilization device then arrives interim stockyard roping phosphogypsum as required.
The preferred FXJ-￠ of described swirler 200S * 12 type swirlers.
The preferred GT-1836 type of described high frequency shale shaker high frequency shale shaker.
Compared with prior art, the present invention has following beneficial effect:
1, present method technical process is succinct, and weight of equipment is light, and the investment cost of equipment purchase and installation is low, can realize reaching the purpose of taking phosphogypsum with minimum investment.
2, the energy consumption of GT-1836 type high frequency shale shaker low (vibrating motor power is only several to tens kilowatts), the efficient height, productive expense and maintenance cost are lower.
3, Wet-process Phosphoric Acid Production is not subjected to the influence of phosphogypsum consumption, roping road and weather, guarantees the phosphoric acid by wet process ordinary production.
4, through behind the cyclone classification, can realize reducing the influence of fine impurities to fully utilizing in the phosphogypsum, can also develop subsequent product targetedly according to the different fineness of phosphogypsum, promote comprehensive utilization of phosphogypsum, reach the economic benefit that increases the phosphogypsum comprehensive utilization.
5, reduced investment, floor space is little, can not be subjected to the restriction in place and influences, and can increase device from the nearer position of factory building, thereby realize closely roping phosphogypsum, reduces the roping cost, reduces the cost that phosphogypsum utilizes, and improves product competitiveness.
6, technical scheme of the present invention is taken phosphogypsum new thinking is provided solving existing large-scale phosphoric acid by wet process enterprise, has active operation significance and application value.
Description of drawings
Fig. 1 is the process flow sheet that the wet method deslagging is carried phosphogypsum in the prior art;
Fig. 2 takes the process flow sheet of phosphogypsum for wet method of the present invention.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described in further detail, but drawings and Examples are not limitation of the invention.
Embodiment 1
Carry out phosphogypsum in the international three ring branch officies of the Yunnan skiesization and take test.
1, test conditions: industrial scale: 120,000 tons/year, major equipment model (swirler: FXJ-￠ 200S * 12, high frequency shale shaker: GT-1836)
2, process of the test: the phosphogypsum in the wet method Residue extraction pipeline is entered the phosphogypsum groove, with the phosphogypsum transferpump phosphogypsum slurry being sent into the swirler group again carries out eddy flow and concentrates, the phosphogypsum slurry that swirler overflows enters the phosphogypsum storage tank, delivers to phosphogypsum slag field by deslagging pump again and stores up; After compiling, the phosphogypsum slurry that the swirler underflow comes out enters high frequency shale shaker; High frequency shale shaker is with the phosphogypsum slurry solid-liquid separation that enters, and undersized phosphogypsum slurry returns the phosphogypsum storage tank, delivers to phosphogypsum slag field by deslagging pump and stores up; Dried phosphogypsum on the sieve plate then is transported to interim stockyard by belt and stores up; The phosphogypsum comprehensive utilization device then arrives interim stockyard roping phosphogypsum as required.
Cyclone classification concentration principle:, select the specification and the structural parameter of design swirler according to phosphogypsum crystalline size-grade distribution, phosphogypsum slurry concentration and flow.The phosphogypsum slurry is by under the pressure effect of transferpump, tangentially enter swirler from the swirler pastry mouth, then form the rotational shear turbulent motion in the inside of swirler, thereby obtain bigger centrifugal force, the phosphogypsum slurry is subjected under the acting in conjunction of centrifugal force and gravity, because the difference of granularity and density, suffered centrifugal force, entad the size of buoyancy and fluid drag force is all inequality between coarse particles that includes and the fine particle, and coarse particles will be different with fine grain direction of motion.Be subjected to the effect of centrifugal settling, coarse particles is heavier, action of gravity is bigger, will discharge from the head piece of swirler bottom, and fine particle is light, centrifugal action is bigger, will discharge from the upflow tube of swirler, compile at last and return the phosphogypsum storage tank, deliver to the slag field by the phosphogypsum transferpump.So just realized separating of light phase and heavy phase, or liquid separates with particulate.Thereby make the swirler underflow density improve to reach material is carried out classification and spissated purpose.The swirler unit has adopted polyurethane material, but not only wear-resisting but also acid-resistance corrosion, and final selected swirler is FXJ-￠ 200S * 12 types.
The high frequency shale shaker principle of work: the screen box sieve plate of high frequency shale shaker is worked under the drive of dither motor, when the phosphogypsum slurry that feeds weight concentration＞50%, the solid particulate of various grades is assembled under the effect of HF oscillation and is closely united in the slurry, space between the coarse particles of piling up is filled by fine particle, it is external that moisture content between the various grade particles is extruded the material of uniting, pass through the amplitude motion of screen box body again, hold agglomerating granule materials tightly and be close to the sieve plate surface, promoted continuously before sieve, to move and shifting discharge outlet discharge onto.Water and part phosphogypsum solid particulate see through the draining screen sieve aperture and discharge, and return the phosphogypsum storage tank after the collection, are stored up by phosphogypsum pumping slag field.Phosphogypsum on the high frequency shale shaker is removed most of moisture, become the phosphogypsum solid that can do heap, this solid is transported to interim stockyard by belt and stacks, and fully utilizes factory by vehicles drive to gypsum again and utilizes, this high frequency shale shaker material is a stainless steel, but the acid-resistance corrosion.Final definite high frequency shale shaker model is GT-1836.
3, test-results: the phosphogypsum of taking reaches target, produces as a trial extremely successfully, obtains following outstanding technique effect and remarkable economic efficiency:
1. adopt the swirler group effectively the phosphogypsum slurry to be concentrated to solid content more than 50%, thereby guarantee that high frequency shale shaker can works better.
2. the high frequency shale shaker dehydrating effect is remarkable, and the phosphogypsum moisture after the filtration is about about 30%, is easy to do heap and transportation.
3. install about 2 kilometers of Paper-faced gyp factory of branch office, shipment distance is short to the slag field, and freight charges are low, and actual gypsum trucking costs per ton reduces about 3 yuan.
Claims (1)
1. take the method for phosphogypsum under the wet method deslagging condition, this method may further comprise the steps:
The phosphogypsum slurry of (1) the wet method Residue extraction pipeline being discharged is sent into the swirler group and is carried out eddy flow and concentrate, and the phosphogypsum slurry that swirler overflows enters the phosphogypsum storage tank, delivers to phosphogypsum slag field by deslagging pump again and stores up; After compiling, the phosphogypsum slurry that the swirler underflow comes out enters high frequency shale shaker; Described swirler is FXJ-￠ 200S * 12 type swirlers; Described high frequency shale shaker is a GT-1836 type high frequency shale shaker;
(2) high frequency shale shaker is with the phosphogypsum slurry solid-liquid separation that enters, and undersized phosphogypsum slurry returns the phosphogypsum storage tank, delivers to phosphogypsum slag field by deslagging pump and stores up; Dried phosphogypsum on the sieve plate then is transported to interim stockyard by belt and stores up;
(3) the phosphogypsum comprehensive utilization device then arrives interim stockyard roping phosphogypsum as required.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110182472 CN102336428B (en) | 2011-06-30 | 2011-06-30 | Method for taking phosphogypsum under wet-process deslagging conditions |
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| CN 201110182472 CN102336428B (en) | 2011-06-30 | 2011-06-30 | Method for taking phosphogypsum under wet-process deslagging conditions |
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| CN102336428B true CN102336428B (en) | 2013-07-24 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103925472B (en) * | 2014-03-25 | 2016-12-07 | 贵州开磷集团股份有限公司 | The method that a kind of long distance delivery ardealite gelling slip fills mine working |
| CN106517292B (en) * | 2016-10-28 | 2019-02-05 | 湖北宜化集团有限责任公司 | A kind of method and device of ardealite purification |
| CN106495198A (en) * | 2016-11-21 | 2017-03-15 | 柳州紫荆技术转移中心有限公司 | A kind of method that utilization hydrocyclone purifies ardealite |
| CN112279540B (en) * | 2020-09-22 | 2022-05-03 | 湖北国创高新材料股份有限公司 | Method for producing alpha-hemihydrate gypsum by using phosphogypsum |
| CN114653473B (en) * | 2022-03-30 | 2023-11-17 | 云南磷化集团有限公司 | Flotation method for efficiently purifying phosphogypsum |
| CN116332239B (en) * | 2023-01-10 | 2023-12-26 | 广西粤桥新材料科技有限公司 | Method for separating iron oxide red from reduced ilmenite |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1299974C (en) * | 2005-02-01 | 2007-02-14 | 云南三环化工有限公司 | Method for improving property of dihydrate wet-process phosphoric acid reaction slurry |
| CN101423203A (en) * | 2008-11-13 | 2009-05-06 | 贵州开磷（集团）有限责任公司 | Water-saving and emission-reducing wet method phosphoric acid manufacture process |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1299974C (en) * | 2005-02-01 | 2007-02-14 | 云南三环化工有限公司 | Method for improving property of dihydrate wet-process phosphoric acid reaction slurry |
| CN101423203A (en) * | 2008-11-13 | 2009-05-06 | 贵州开磷（集团）有限责任公司 | Water-saving and emission-reducing wet method phosphoric acid manufacture process |
Non-Patent Citations (2)
| Title |
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| 利用闲置设备生产精制磷石膏;吕贵彬等;《磷肥与复肥》;20040331;第19卷(第2期);76-77 * |
| 吕贵彬等.利用闲置设备生产精制磷石膏.《磷肥与复肥》.2004,第19卷(第2期),76-77. |
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Owner name: YUNNAN YTH INTERNATIONAL CHEMICAL CO., LTD. Free format text: FORMER OWNER: YUNNAN YUNTIANHUA INTERNATIONAL CHEMICAL CO., LTD. SANHUAN BRANCH Effective date: 20130924 |
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Effective date of registration: 20130924 Address after: 650228 Dianchi Road, Yunnan, China, No. 1417, No. Patentee after: Yunnan YTH International Chemical Co., Ltd. Patentee after: Kunming Jiyuan Technology Co., Ltd. Address before: 650000 Xishan District, Yunnan, Haikou, Kunming Patentee before: Yunnan Yuntianhua International Chemical Co., Ltd. Sanhuan Branch Patentee before: Kunming Jiyuan Technology Co., Ltd. |
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