CN101428980A - High-titanium blast furnace slag cooling treatment method - Google Patents
High-titanium blast furnace slag cooling treatment method Download PDFInfo
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- CN101428980A CN101428980A CNA2008103060672A CN200810306067A CN101428980A CN 101428980 A CN101428980 A CN 101428980A CN A2008103060672 A CNA2008103060672 A CN A2008103060672A CN 200810306067 A CN200810306067 A CN 200810306067A CN 101428980 A CN101428980 A CN 101428980A
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Abstract
The invention relates to a cooling treatment method for high titanium blast furnace slag, which belongs to the field of the treatment of furnace slag. The technical problem to be solved by the invention is to provide a cooling treatment method for treating a large amount of high titanium blast furnace slag. The cooling treatment method for the high titanium blast furnace slag comprises the following steps: discharged blast furnace slag is cooled through the slag-turning treatment, wherein the slag-turning treatment is to perform slag turning and ensure that the thickness of a slag layer is less than or equal to 30 cm, the blast furnace slag is naturally cooled for 30 to 50 min in the air, then the watering is performed on the blast furnace slag to ensure that the thickness of accumulated water on the surface of the blast furnace slag is between 0.8 and 1.2 cm and the water is naturally evaporated to dryness; when red slag still exists after the watering, the water supplement is performed on the blast furnace slag, and the accumulated water is naturally evaporated to dryness. The cooling treatment method for the high titanium blast furnace slag is applicable to the treatment of the blast furnace slag in a large quantity in industry, has low cost, can obtain granulated slag with better performance, and has broad application prospect.
Description
Technical field
The present invention relates to the cooling treatment method of high-titanium blast furnace slag, belong to the process field of slag.
Background technology
Along with Iron And Steel Industry changes to the environmental protection industry of zero release, the environmental protection processing must be through technology---the cooling process technology of blast furnace slag is subject to the people's attention.At present, to not containing TiO
2Blast furnace slag, according to different purposes, its cooling treatment method mainly contains hot application method, dish water-sprinkling cold (ISC method), water quenching, the wind method etc. of quenching.Wherein the most frequently used is the hot application method, is after pouring the hot melt blast furnace slag into slag ladle, to transport to blast furnace slag hot application scene with vehicle, utilizes crane that the blast furnace slag layering in the slag ladle is sprinkled and is poured on the slag-bed or in the pit, sprays an amount of water, makes the high temperature furnace slag chilling cracked.
The v-ti magnetite mineral content of China's Panzhihua Region is abundant, contains 20～26% TiO in the blast furnace slag that this vanadium titano-magnetite ironmaking back produces
2, so this blast furnace slag is called high-titanium blast furnace slag.Compare with general blast furnace slag, the density of high-titanium blast furnace slag is bigger, thickness, mobile relatively poor comparatively when being in molten state.For high-titanium blast furnace slag, the general hot application method of main at present employing is carried out cooling process, implements to continue the mode of fetching water and impels the blast furnace slag cooling, and the unit consumption of fetching water reaches 1.33 tons of water/ton slag.There is the lack of standardization of pit in this treatment process and arbitrarily be subjected to slag, make accumulated slag thicker, cause that the amount of fetching water is big, inhomogeneous cooling is even, the grain slag crushing property index that obtains is bigger than normal, the III class standard that does not reach enterprise requires (crush values is less than 18%), has limited the extensive utilization of high-titanium blast furnace slag and has produced high-quality metallurgical slag product.
Application number is 200710168881.8, denomination of invention discloses a kind of water spray system and following water spray system of being provided with for the patent application of " a kind of waterworks of hot converter steelmaking slag and method of cooling " on the slag railway carriage or compartment of 20 * 22m, the thick metallurgical slag of 2.5m is carried out the layering water spray, and adopt the mode of being interrupted water spray to circulate and spray water 58 times, reach 50 hours the cooling time of fetching water.This method is only applicable to handle solid-state slag, can't handle the blast furnace slag of liquid state (molten state).And related waterworks has increased the repair and maintenance expense of equipment in this technology, is unfavorable for reducing cooling cost, and its processing power is limited, can't in time handle the high-titanium blast furnace slag of a large amount of (day quantity discharged reaches about 12000 tons).
Summary of the invention
Technical problem to be solved by this invention provides a kind of cooling treatment method of handling a large amount of high-titanium blast furnace slags that is applicable to.
The cooling treatment method of high-titanium blast furnace slag of the present invention is: the blast furnace slag of coming out of the stove makes the blast furnace slag cooling through turning over the slag processing; Wherein, the described slag that turns over is treated to: turn over slag (turn over slag promptly refer to blast furnace slag pour pit into by slag ladle) and make thickness of slag layer≤30cm, blast furnace slag is naturally cooling 30～50min in air, then blast furnace slag is fetched water, and makes blast furnace slag surface area water 0.8～1.2cm and allows water nature evaporate to dryness; When still having red slag after fetching water, it is carried out moisturizing, and allow ponding nature evaporate to dryness.
Wherein, above-mentioned thickness of slag layer is preferably 10～20cm.The thickness of blast furnace slag slag blanket has very big influence to the cooling process of slag, during the thick 10～20cm of slag blanket, can allow slag body temperature degree be reduced to below 800 ℃ in the naturally cooling certain hour, the cooling of fetching water again can cool in 1 hour below 100 ℃, being convenient in time carry out the later stage successionally turns over the slag operation, make it turn over slag at every turn and form surface of fracture naturally, help pushing away the slag operation.When slag blanket surpasses 30cm, the slag body naturally cools to 800 ℃ of required times and wants more than several hours, can't meet the needs of production, and too thick the fetching water of slag blanket is difficult to when cooling off water is beaten lower floor's warm sludge, also there are a large amount of red slags in lower floor's slag when causing the processing warm sludge, causes very big difficulty for the processing of blast furnace slag.
Further, when blast furnace slag more after a little while, once turn over slag and can handle fully, when blast furnace slag more for a long time, need be divided into repeatedly and to handle, concentrate to push away to dig at last get final product, can save blast furnace slag like this and cool off, push away the total time of digging.The blast furnace slag of coming out of the stove is divided into and repeatedly turns over slag when handling, the thickness of slag layer that at every turn turns over slag all≤30cm, blast furnace slag can be concentrated to push away and dig once after handling 5～7 times.
Further, the cooling treatment method of high-titanium blast furnace slag of the present invention comprises the steps:
A, once turn over slag: the blast furnace slag of coming out of the stove is poured in the pit, naturally cooling 30～40min in air then, to the heap of the dried shell above the slag blanket fetch water (liquid blast furnace after entering slag ladle in the period of turning over slag, because its jar of action of thermal difference inner bottom part can form solid slag by nature, liquid slag can be taken advantage of a situation and be dropped down the nature levelling when turning over slag, and solid slag is beaten through steam hammer and is shot down nature and be piled into slag muck and be dried shell heap, dried shell heap generally can be higher than about top of the slag 300mm, the water yield of its cooling and absorbing is big, and height fall makes the current direction top of the slag that does not in time absorb, therefore need to fetch water to dried shell heap earlier), the time of fetching water is generally 10～20min (as the case may be, but proper extension or shortening), make blast furnace slag surface area water 0.8～1.2cm, allow ponding nature evaporate to dryness; When the dried shell heap after fetching water still has red slag, it is carried out moisturizing, and allow ponding nature evaporate to dryness;
When above the slag blanket during no dried shell heap, directly fetched water in the slag blanket surface, make blast furnace slag surface area water 0.8～1.2cm, allow ponding nature evaporate to dryness;
Turn over slag b, secondary～six time: the blast furnace slag of coming out of the stove is poured on and turned over the cooled blast furnace slag of slag surface last time, and all the other working method are with a step;
C, turn over slag and cooling for the last time: the blast furnace slag of coming out of the stove is poured on and turned over the cooled blast furnace slag of slag surface last time, and blast furnace slag is naturally cooling 40～50min in air, then dried shell heap is fetched water, and makes blast furnace slag surface area water 0.8～1.2cm, allows ponding nature evaporate to dryness; When the dried shell heap after fetching water still has red slag, it is carried out moisturizing, and allow ponding nature evaporate to dryness; Concentrate at last to push away and dig processing;
When above the slag blanket during no dried shell heap, directly fetched water in the slag blanket surface, make blast furnace slag surface area water 0.8～1.2cm, allow ponding nature evaporate to dryness, concentrate at last to push away and dig processing.
Further, the cooling treatment method of high-titanium blast furnace slag of the present invention, the described pit of above-mentioned a step comprises the pit bottom surface, (the slag blocking wall height is generally 1000～1200mm to slag blocking wall, with control thickness of slag layer≤30cm), turn over the slag platform, turn over the slag road, the pit bottom surface tilts 10～12 °, turns over to be provided with water supply line in the slag platform and the water pipe of fetching water; Turn over the slag road and be positioned at and turn over below the slag platform, generally 15～20 slag ladles (slag ladle is a kind of special container that can adorn the high-temperature liquid state slag) are weaved into one group, after turning over the slag road, turn over the slag operation with locomotive traction.
Further, above-mentioned pit is preferred wide 15～25 meters, dark 4～5 meters pit.
Further, preferred dry, smooth, no obvious convexo-concave pit bottom surface, above-mentioned pit bottom surface.If the road face of pit is relatively moister, then " foamy slag " of Xing Chenging is more, can form a large amount of water vapors simultaneously and enter blast furnace slag inside, make warm sludge under hot stage can't stable solidification, influence crystallization and structural changes in the warm sludge, warm sludge inside after solidifying has a large amount of water vapors to discharge, and forms many holes that vary in size, and influences the quality of gained clinker.The pit bottom surface is smooth, do not have obvious convex-concave, helps flowing of liquid blast furnace.
Further, the above-mentioned preferred water supply capacity of water supply line is 600～700m
3/ hour water supply line, most preferably deliverability is 650m
3/ hour water supply line.
Further, above-mentionedly turn in the slag platform at interval that 400～600mm is provided with the water pipe of fetching water.
Further, the above-mentioned water pipe of fetching water comprises big pipe and little water pipe (bore of big pipe is generally about 60mm, the bore of little water pipe be about 30mm), and little water pipe quantity is 2 times of big pipe, and each water pipe is uniform distribution in turning over the slag platform.
The cooling treatment method of high-titanium blast furnace slag of the present invention is applicable to industrial a large amount of processing blast furnace slag (can handle more than 12000 tons every day), the unit consumption of fetching water that adopts the inventive method to handle blast furnace slag is 0.65 ton of water/ton slag, far below general hot application technology 1.33 tons of water of the unit consumption/ton slag of fetching water, handling 12000 tons day, but 8200 tons of water saving every day.It is hard that the cooling treatment method of high-titanium blast furnace slag of the present invention is handled gained blast furnace slag particle, created condition for titanium slag in the comprehensive utilization and the raising added value of the metallurgical slag product of more than 30 kind of ten big series such as slag concrete, slag cement, high titanium type petroleum oil pressing crack propping agent, had broad application prospects.
Description of drawings
Fig. 1 is the floor map of the used pit of cooling treatment method of high-titanium blast furnace slag of the present invention;
Fig. 2 is the vertical view of Fig. 1.
1 is water supply line among the figure, and 2 is big pipe, and 3 is little water pipe, and 4 is the pit bottom surface, and 5 is angle of inclination, pit bottom surface, and 6 is the pit width, and 7 is the pit degree of depth, and 8 is slag blocking wall, and 9 for turning over the slag road, and 10 for turning over the slag platform.
Embodiment
Below in conjunction with embodiment the specific embodiment of the present invention is further described, does not therefore limit the present invention among the described scope of embodiments.
The application of the cooling treatment method of embodiment high-titanium blast furnace slag of the present invention
The floor map of the used pit of cooling treatment method of high-titanium blast furnace slag of the present invention is seen Fig. 1, and the vertical view of Fig. 1 is seen Fig. 2, and the concrete operations step of the cooling treatment method of high-titanium blast furnace slag of the present invention is as follows:
1, the facility requirement of fetching water
(1) according to pit length deliverability being set in turning over slag platform 10 is 650m
3/ hour water supply line 1, and 500mm pipe of fetching water that distributes at interval, the water coolant that assurance is got can cover the whole high-titanium blast furnace slag top of the slag.
(2) 2,18 of big pipes are available and be evenly distributed in the pit.
(3) 3,36 in little water pipe is available and be evenly distributed in the pit.
(4) guarantee that big pipe 2 and little water pipe 3 can carry out boiling water, Guan Shui flexibly effectively, water pipe is water-tight.
2, pit requirement
(1) pit bottom surface 4 dryings, smooth do not have obvious convex-concave.
(2) angle of inclination, pit bottom surface 5 is 12 °.
(3) pit width 6 is 22 meters.
(4) the pit degree of depth 7 is 4 meters.
(5) slag blocking wall 8 straight, highly be 1100mm.
3, turn over the slag requirement
Turn on the slag road 9 at same, blast furnace slag turns over the slag activity duration and at interval must not be less than 60min twice, must not concentrate a place to turn over slag and beat jar (beat jar be steam hammer beat slag ladle), and the maintenance blast furnace slag is consistency of thickness everywhere.
4, the cooling process of blast furnace slag
(1) 12000 ton of high-titanium blast furnace slag of coming out of the stove, carry out turning over the first time slag earlier, turn over that thickness of slag layer is 26cm behind the slag, naturally cooling 35min, 18 dried shells heaps are aimed at dried shell with 18 big pipes 2 pile the 20min that fetches water, stop to fetch water, allow behind its natural evaporate to dryness, according to dried shell slag muck size, dried shell heap place's moisturizing of the red slag of high temperature is arranged with 2 pairs of 2 big pipes.Guarantee the not a large amount of ponding of the top of the slag in the process of fetching water, 10min stops to fetch water before turning over slag for the second time, guarantees top of the slag drying.
(2) for the second time time turn over slag～six, according to turning over the slag period planning next time, naturally cooling 30～40min, fetch water with 2 pairs of dried shell heaps of corresponding big pipe according to dried shell heap number, simultaneously with 3 pairs in the little water pipe of the 2 multiple amounts top of the slag 10～20min that fetches water at a distance, water is uniformly distributed in all top of the slag when fetching water, and stops to fetch water, and allows its natural evaporate to dryness.Available as the case may be water pipe moisturizing 10～20min, tubule is beaten nearby, and bassoon is beaten at a distance, allows water evenly be sprayed on the top of the slag, stops to fetch water, and allows its natural evaporate to dryness, guarantees to turn over next time top of the slag drying before the slag.
Turn over slag (3) the 7th times, naturally cooling 40min fetches water with 2 pairs of dried shell heaps of 18 big pipes to 18 dried shell heaps, in addition with 3 pairs in 36 little water pipes at a distance the top of the slag fetch water and stop to fetch water behind the 20min, when fetching water, make water be uniformly distributed in all top of the slag, allow its natural evaporate to dryness, push away then and dig processing.
(4) push away in the slag process, the red slag of local discovery carries out moisturizing and handles, and stops to fetch water after red slag disappears, and pushes away then and digs operation, after handling blast furnace slag, keeps the drying of pit bottom surface, and is smooth, and tilts 12 °.
Handle 12000 tons of high-titanium blast furnace slags of coming out of the stove, amount to 7800 tons of waters (0.65 ton of the average water of blast furnace slag per ton), amount to time spent 10h, the crush values average out to 13% of gained grain slag.From The above results as can be seen, after using the inventive method cooling process high-titanium blast furnace slag, the excellent property of gained grain slag, and water consumption is starkly lower than the water consumption (1.33 tons of water/ton slags) of existing technology, the used time is shorter, and the inventive method has broad application prospects.
Claims (9)
- The cooling treatment method of [claim 1] high-titanium blast furnace slag is characterized in that: the blast furnace slag of coming out of the stove makes the blast furnace slag cooling through turning over the slag processing;
- Wherein, the described slag that turns over is treated to: turn over slag and make thickness of slag layer≤30cm, blast furnace slag is naturally cooling 30～50min in air, then blast furnace slag is fetched water, and makes blast furnace slag surface area water 0.8～1.2cm and allows water nature evaporate to dryness; When still having red slag after fetching water, it is carried out moisturizing, and allow ponding nature evaporate to dryness.
- The cooling treatment method of [claim 2] high-titanium blast furnace slag according to claim 1 is characterized in that: described thickness of slag layer is 10～20cm.
- The cooling treatment method of [claim 3] high-titanium blast furnace slag according to claim 1 is characterized in that: the blast furnace slag of coming out of the stove divides and turns over slag for 5～7 times and handle, the thickness of slag layer that at every turn turns over slag all≤30cm, concentrate to push away to dig at last to get final product.
- The cooling treatment method of [claim 4] high-titanium blast furnace slag according to claim 3 is characterized in that: comprise the steps:A, once turn over slag: the blast furnace slag of coming out of the stove is poured in the pit, and naturally cooling 30～40min in air fetches water to the dried shell heap above the slag blanket then, makes blast furnace slag surface area water 0.8～1.2cm, allows ponding nature evaporate to dryness; When the dried shell heap after fetching water still has red slag, it is carried out moisturizing, and allow ponding nature evaporate to dryness;When above the slag blanket during no dried shell heap, directly fetched water in the slag blanket surface, make blast furnace slag surface area water 0.8～1.2cm, allow ponding nature evaporate to dryness;Turn over slag b, secondary～six time: the blast furnace slag of coming out of the stove is poured on and turned over the cooled blast furnace slag of slag surface last time, and all the other working method are with a step;C, turn over slag and cooling for the last time: the blast furnace slag of coming out of the stove is poured on and turned over the cooled blast furnace slag of slag surface last time, and blast furnace slag is naturally cooling 40～50min in air, then dried shell heap is fetched water, and makes blast furnace slag surface area water 0.8～1.2cm, allows ponding nature evaporate to dryness; When the dried shell heap after fetching water still has red slag, it is carried out moisturizing, and allow ponding nature evaporate to dryness; Concentrate at last to push away and dig processing;When above the slag blanket during no dried shell heap, directly fetched water in the slag blanket surface, make blast furnace slag surface area water 0.8～1.2cm, allow ponding nature evaporate to dryness, concentrate at last to push away and dig processing.
- The cooling treatment method of [claim 5] high-titanium blast furnace slag according to claim 4, it is characterized in that: the described pit of a step comprises pit bottom surface (4), slag blocking wall (8), turn over slag platform (10), turn over slag road (9), pit bottom surface (4) tilts 10～12 °, turns over and is provided with the water supply line (1) and the water pipe of fetching water in the slag platform (10); Turning over slag road (9) is positioned at and turns over below the slag platform (10).
- The cooling treatment method of [claim 6] high-titanium blast furnace slag according to claim 5 is characterized in that: described pit bottom surface (4) is dry, smooth, do not have obvious convex-concave.
- The cooling treatment method of [claim 7] high-titanium blast furnace slag according to claim 5 is characterized in that: the water supply capacity of described water supply line is 600～700m 3/ hour, turn over the middle 400～600mm at interval of slag platform (10) water pipe of fetching water is set.
- The cooling treatment method of [claim 8] high-titanium blast furnace slag according to claim 7, it is characterized in that: the described water pipe of fetching water comprises big pipe (2) and little water pipe (3), little water pipe (3) quantity is 2 times of big pipe (2), and each water pipe is uniform distribution in turning over slag platform (10).
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106904845A (en) * | 2017-04-01 | 2017-06-30 | 攀钢集团研究院有限公司 | The production method of the special titanium slag of sulfate process titanium dioxide |
| CN108842013A (en) * | 2018-08-16 | 2018-11-20 | 成渝钒钛科技有限公司 | A kind of processing method of blast furnace dry slag breaking method and blast furnace slag |
| CN108975738A (en) * | 2018-08-16 | 2018-12-11 | 成渝钒钛科技有限公司 | A kind of processing method of blast furnace dry slag sand method and blast furnace slag |
| CN108977598A (en) * | 2018-08-16 | 2018-12-11 | 成渝钒钛科技有限公司 | A kind of blast furnace slag hot disintegration method and blast furnace slag sand method |
| CN110092603A (en) * | 2019-06-10 | 2019-08-06 | 成渝钒钛科技有限公司 | Vanadium titanium science and technology blast furnace dry slag produces building material technology research |
| CN111717933A (en) * | 2020-06-29 | 2020-09-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Reduce rutile type TiO in titanium slag2Titanium slag rapid cooling system and method |
| CN113831031A (en) * | 2021-10-13 | 2021-12-24 | 四川德胜集团钒钛有限公司 | Method for preparing concrete aggregate from titanium-containing blast furnace slag |
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2008
- 2008-12-10 CN CNA2008103060672A patent/CN101428980A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106904845A (en) * | 2017-04-01 | 2017-06-30 | 攀钢集团研究院有限公司 | The production method of the special titanium slag of sulfate process titanium dioxide |
| CN108842013A (en) * | 2018-08-16 | 2018-11-20 | 成渝钒钛科技有限公司 | A kind of processing method of blast furnace dry slag breaking method and blast furnace slag |
| CN108975738A (en) * | 2018-08-16 | 2018-12-11 | 成渝钒钛科技有限公司 | A kind of processing method of blast furnace dry slag sand method and blast furnace slag |
| CN108977598A (en) * | 2018-08-16 | 2018-12-11 | 成渝钒钛科技有限公司 | A kind of blast furnace slag hot disintegration method and blast furnace slag sand method |
| CN108975738B (en) * | 2018-08-16 | 2021-08-03 | 成渝钒钛科技有限公司 | Sand making method of blast furnace dry slag and treatment method of blast furnace slag |
| CN110092603A (en) * | 2019-06-10 | 2019-08-06 | 成渝钒钛科技有限公司 | Vanadium titanium science and technology blast furnace dry slag produces building material technology research |
| CN111717933A (en) * | 2020-06-29 | 2020-09-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Reduce rutile type TiO in titanium slag2Titanium slag rapid cooling system and method |
| CN113831031A (en) * | 2021-10-13 | 2021-12-24 | 四川德胜集团钒钛有限公司 | Method for preparing concrete aggregate from titanium-containing blast furnace slag |
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Application publication date: 20090513 |