CN1824812A - Technique and equipment for processing blast furnace smelting slag - Google Patents
Technique and equipment for processing blast furnace smelting slag Download PDFInfo
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- CN1824812A CN1824812A CNA2005100872078A CN200510087207A CN1824812A CN 1824812 A CN1824812 A CN 1824812A CN A2005100872078 A CNA2005100872078 A CN A2005100872078A CN 200510087207 A CN200510087207 A CN 200510087207A CN 1824812 A CN1824812 A CN 1824812A
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Abstract
This invention discloses a new blast furnace smelting slag disposal technique-bottom filtrating way producing granulating slag, and the equipment for realizing this technique is disclosed. The processing technique mainly includes the furnace clinker is pressed into granulating slag and water mixture by slag flushing water, the mixture is injected into filter pool along slag flushing channel (5), the granulating slag is piled up above of filtering layer in the pool and caught by car, water became pure water and enter filter tube (18) lower of the filtering layer after it through granulating slag layer (21), filtering layer (19), then it influxes at filtering header pipe and discharged out of the pool from the pool bottom, finally it is cycled used in furnace slag flushing after derived from hot water head pipe. The investing is small, and the equipment is also few, the technique is stable and reliable, running cost is low, no pollution, so it is propitious to developing area and factory.
Description
Technical field
The present invention relates to a kind of treatment of slag, the treatment process-end filter method that relates in particular to a kind of blast furnace smelting slag is produced grain slag, belongs to the blast-furnace slag processing technology field.
Background technology
The pig iron of China's production at present all is to adopt blast furnace production, is accompanied by the production of the pig iron, the also corresponding generation of its appurtenant---slag.In China, slag mainly is to become grain slag with the waterpower punching out, and the grain slag of production is mainly transported to the cement mill, grinds to form segmentation, is used to make cement of high index.
The grain slag treatment process mainly contains following 6 kinds of methods at present:
1, settling tank method: pulp water enters in the big concrete sump, and along with flow velocity slows down, caught away grain slag by the overhead traveling crane grab bucket in (precipitator method name source) again at the bottom of grain slag was deposited in the pond.The major advantage of this technology: technology is simple, reliable; Shortcoming: grab slag in the water, band water is many in the slag, and in the grain slag transportation, pulp water is dropped seriously, contaminate environment; Be with slag in the recirculated water, water pump, pipe wear are serious.
2, Lhasa (RASA) method: pulp water enters separator tank, and the pulp water that sinks to the bottom is got to the fixedly dewatering tank of being made up of silk screen, steel grating etc. by the slag stock pump, separates to realize pulp water.Advantage: flexible arrangement.Shortcoming: be with slag in the recirculated water, water pump, pipe wear are serious.
3, INBA method: pulp water enters the swing roller of being made up of silk screen, steel grating etc., separates to realize pulp water.Advantage: the stokehold does not have steam, good work environment.Shortcoming: investment is high; The mechanization degree height requires height to the direct labor; The working cost height; Be with slag in the recirculated water, water pump, pipeline have wear problem.
4, wheel method furnace slag treatment unit: slag is aided with hydraulic discharged slag by swiveling wheel fragmentation (wheel method name source).Pulp water enters the swing roller of being made up of silk screen, steel grating etc., separates to realize pulp water.Advantage: with swiveling wheel Mechanical Crushing slag, band iron can not explode yet in the slag; Take up an area of less, flexible arrangement.Shortcoming: mechanization degree, potential faults is many; The working cost height; Be with slag in the recirculated water, water pump, pipe wear are serious; The tank slag is serious.
5, Ming Tekefa: pulp water enters detritus pool, by the screw machine that tilts grain slag is promoted from detritus pool, overflows pulp water and enters the swing roller of being made up of silk screen, steel grating etc., separates to realize pulp water.Advantage: equipment is simple, reliable.Shortcoming: working cost height; Be with slag in the recirculated water, water pump, pipeline have wear problem; Tank has the slag problem.
In sum, still lack the blast furnace smelting slag treatment process that a kind of cost is low, process stabilizing is reliable, free from environmental pollution at present.
Summary of the invention
The present invention's technical problem at first to be solved is to overcome the deficiencies in the prior art, and the blast furnace smelting slag that a kind of cost is low, process stabilizing is reliable, free from environmental pollution treatment process is provided.
Technical problem to be solved by this invention realizes by following technological approaches:
A kind of blast furnace smelting slag treatment process may further comprise the steps:
1) blast furnace slag is become the mixture of grain slag and water by the punching out of flushing cinder water, and filtering basin 1 are injected in the top of slag-water slurry along sluice from filtering basin; Grain slag is deposited in the top of filtering layer 19 in the filtering basin 1, flushing cinder water passes grain slag layer 21 and becomes the strainer tube 18 that water purification enters into the filtering layer below by the filtering layer 19 that the pebbles that 4 layers of particle diameter and thickness have nothing in common with each other is formed, be pooled to and filter the below discharge filtering basin of house steward from filtering basin, recirculation is used for blast furnace slag flushing after the hot water house steward derives;
(filtering basin are grabbed slag and can suitably be adjusted according to the production practical situation when 2) grain slag is piled up above 0.3 meter in the pond 1 to be filtered or through 2 flushing cinders (about 2 hours), not influencing production with slag height in filtering basin filtration velocity and the pond is as the criterion), close the sluice valve (3) of filtering basin (1), close the hot-water valve (10) of filtering basin (1), start the exhaust-valve (12) of filtering basin 1, start drain pump group (13), with the water emptying in the filtering basin (1), make the wet grain slag of being piled up in the filtering basin 1 become the solid carbon dioxide slag, the solid carbon dioxide slag is transported, and filtering basin (1) are standby; At the sluice valve 3 of closing filtering basin 1 simultaneously, open the sluice valve 4 of filtering basin 2, make slag-water slurry flow to filtering basin 2, in filtering basin 2, proceed slag treatment technology;
3) filtering basin 1 and filtering basin 2 are used alternatingly, and above-mentioned slag treatment technology is carried out continuously.
In the above-mentioned treatment process, the water purification of deriving through the hot water house steward in the step 1) also can be used further to blast furnace slag flushing after overcooling.
The present invention is with reference to the work principle of filter of nature sandstone to mountain spring, allow slag-water slurry flow into from the top of filtering basin, permeation filtration takes place, water passes in the filtering basin filtering system of being made up of grain slag layer and 4 layers of particle diameter and the different pebbles of thickness under action of gravity, through permeation filtration, become water purification and enter the strainer tube that is laid on the filtering layer below, be pooled to again and filter the below outflow of house steward from filtering basin, recirculation is used, and grain slag is blocked by filtering layer top grain slag, be deposited in the filtering layer top, thereby realize that pulp water separates.
Enter the hot water house steward from the effusive water purification in the below of filtering basin through hot water valve.The hot water house steward links to each other with the slag flushing pump group, and slag flushing pump is got to the stokehold with water purification and continued flushing cinder, thereby the water cycle that realizes slagging tap is used.If the user needs, hot water house steward's water pump also can reach the cooling frame cooling with filtering back hot water, enters tank, gets to the stokehold flushing cinder by the slag flushing pump group again.For northern area, in the winter time, hot water also can reach in the resident family, as the winter heating water in the hot water house steward.
Another technical problem to be solved by this invention provides the specific equipment of realizing above-mentioned slag treatment technology.
Another technical problem to be solved by this invention realizes by following technological approaches:
Realize the specific equipment of above-mentioned slag treatment technology, comprising:
1, filtering basin: be concrete structure, mainly form by strainer tube 18, filtering layer 19, protective frame 20, grain slag layer 21 and water layer 22;
Wherein, strainer tube 18 is layed in the below of filtering layer 19;
Filtering layer 19 is made up of 4 layers of particle diameter pebbles different with thickness, and specification from the bottom to top is respectively: 1) the 1st layer of pebbles: high 700～900cm, granularity 16～25mm; 2) the 2nd layer of pebbles: high 70～120cm, granularity 8～16mm; 3) the 3rd layer of pebbles: high 70～120cm, granularity 4～8mm; 4) the 4th layer of pebbles: high 400～600cm, granularity 2～4mm;
Protective frame 20 is positioned at the top of filtering layer 19, protective frame is to be welded into the steel grating structure by Q235A steel plate or steel pipe, the end face of protective frame and filtering layer pebbles end face level, the effect of protective frame are in order to prevent that grabbing car also catches away pebbles when catching away the solid carbon dioxide slag; It above protective frame the grain slag layer 21 of high 150～250mm; The top of grain slag layer is to surpass 1.5 meters high water layers 22.
The shape of filtering basin, size and quantity can be adjusted, arrange according to factors such as furnace volume size, quantity of slag size, geographical position, are that those skilled in the art is easy to grasp and realize.
2, emptying system: form by the exhaust-valve 9 of filtering basin (2), exhaust-valve 12, emptying house steward 11 and the drain pump group 13 of filtering basin (1).
3, hot water emission system: form by the hot water valve 8 of filtering basin (2), hot water valve 10, hot water house steward 14 and the slag flushing pump group 15 of filtering basin (1).
4, the sluice valve 4 of the sluice valve 3 of sluice 5, filtering basin 1, filtering basin 2.
The filtering layer cobble amounts to about 1.2～2m high, is not caught away by overhead traveling crane in order to guarantee pebbles, causes filtering layer destroyed, is provided with protective frame on filtering layer, descends in order to stop grab bucket again.Designing high 150～250mm grain slag layer is to be used for filtering basin to filter for the first time, along with grain slag production, a large amount of grain slags constantly enter filtering basin, and this part grain slag allows to be caught away by overhead traveling crane, the grain slag that newly enters filtering basin can be replenished the grain slag of being caught away, thereby accomplishes the continual renovation of grain slag filtering layer.Flushing cinder water enters filtering basin from the filtering basin top, in order to prevent flushing cinder water filtering layer is punctured " short circuit ", and when filtering basin were worked, the filtering layer top must be existed by the water that surpasses 1.5 meters high, with the protection filtering layer.
The present invention has the outstanding effect of the following aspects:
1, investment is little, and needed mechanical means is less, and process stabilizing is reliable, the trouble spot is few, and very suitable area, the factory that is in developmental stage uses.
2, working cost is low: adopt the water after technology of the present invention is filtered, its degree of cleaning are identical with Drinking Water, and water pump need not to resemble other process using slag stock pumps, but adopt fresh water pump to get final product.Because water quality is good, pipeline, equipment are without any wearing and tearing, and maintenance capacity is extremely low.
3, it is desirable warm to filter back hot water: because clean water quality, filter the heating of can directly registering one's residence of back hot water, can not occur that pipeline weares and teares, the accumulated slag problem.
4, free from environmental pollution: what catch away from filtering basin in the technology of the present invention is dried slag, has avoided in the grain slag transportation, and pulp water is dropped seriously, problems such as contaminate environment.
Description of drawings
Fig. 1 is a blast furnace smelting slag treatment process schematic diagram of the present invention.
Fig. 2 is the sectional drawing of filtering basin of the present invention.
Drawing reference numeral explanation: 1-filtering basin, 2-filtering basin, the sluice valve of 3-filtering basin 1, the sluice valve of 4-filtering basin 2, the 5-sluice, 6-blast furnace, 7-slag ditch, the hot water valve of 8-filtering basin 2, the exhaust-valve of 9-filtering basin 2, the hot water valve of 10-filtering basin 1,11-emptying house steward, the exhaust-valve of 12-filtering basin 1,13-drain pump group, 14-hot water house steward, 15-slag flushing pump group, 16-cooling tower, 17-flushing cinder water-supply pipe, 18-strainer tube, 19-filtering layer, the 20-protective layer, 21-grain slag layer, 22-water layer.
Embodiment
Describe the present invention in detail below in conjunction with the drawings and specific embodiments.
According to furnace volume size, quantity of slag size, design calculation goes out filtering basin size, quantity and filtration velocity, and (filtration velocity of two filtering basin of design is～6t/h.m in the present embodiment
2).Present embodiment adopts 2 filtering basin.Each filtering basin has a sluice valve that connects sluice, whether enters corresponding filtering basin in order to the mixed liquid of control pulp water.During ordinary production, in 2 filtering basin, wherein 1 sluice valve open is produced, and another is closed, as standby.
Blast furnace slag is become grain slag at the stokehold sluice by the flushing cinder water punching out that pelletizer sprays, and 1 top flows to filtering basin 1 to the mixed liquid of pulp water along sluice 5 from filtering basin; When filtering basin 1 work, the sluice valve 4 of filtering basin 2 is closed, and filtering basin 2 are as standby.
The sluice valve of pulp water mixed solution by filtering basin 1 enters into filtering basin 1 from the top of filtering basin, grain slag is owing to the obstruct of grain slag layer 21 is deposited on the filtering layer 19, flushing cinder water is because the weight effect is downward, passing filtering layer 19 becomes water purification and enters strainer tube 18, house steward's outflow filter pond enters hot water house steward 14 through hot water valve after filtration.The hot water house steward links to each other with slag flushing pump group 15, and slag flushing pump is got to the stokehold with water purification and continued flushing cinder, and the water cycle that realizes slagging tap is used.If the user needs, hot water house steward's water pump also can reach cooling tower 16 coolings with filtering back hot water, enters tank, is getting to the cooling flushing cinder by the slag flushing pump group.For northern area, in the winter time, hot water also can reach in the resident family, as the winter heating water in the hot water house steward.
(filtering basin are grabbed slag and can suitably be adjusted according to the production practical situation when 0.3 meter of the grain slag of piling up above the filtering layer of filtering basin 1 or through 2 flushing cinders (about 2 hours), not influencing production with slag height in filtering basin filtration velocity and the pond is as the criterion), its filtration velocity slows down, just close the sluice valve 3 of filtering basin 1, enter and grab the slag stand-by phase.Close its hot water valve 10, itself and hot water house steward 14 are disconnected.Open exhaust-valve 12, open drain pump group 13, should filter the pool inner water emptying.At this moment, grain slag no longer is immersed in the water in these filtering basin, is in the saturated aqueous state, is the solid carbon dioxide slag.By the overhead traveling crane grab bucket solid carbon dioxide slag is grabbed out filtering basin, the entrucking outward transport.When closing the sluice valve 3 of filtering basin 1, open the sluice valve 4 of filtering basin 2, make slag-water slurry flow to filtering basin 2, in filtering basin 2, proceed slag treatment technology;
After grain slag has been grabbed, filtering basin 1 are in stand-by phase, after filtering basin 2 are finished a filtration cycle, close the sluice valve 4 of filtering basin 2, open the sluice valve 3 of filtering basin 1, make filtering basin 1 drop into filtration work again, filtering basin 2 enter grabs the slag stage, slag, filtration are grabbed in 2 filtering basin circulations, make whole blast furnace slag treatment process carry out continuously.
Claims (3)
1. blast furnace smelting slag treatment process may further comprise the steps:
1) blast furnace slag is become the mixture of grain slag and water by the punching out of flushing cinder water, and filtering basin (1) are injected in the top of slag-water slurry along sluice from filtering basin; Grain slag is deposited in the top of filtering layer (19) in the filtering basin (1), flushing cinder water passes grain slag layer (21) and becomes the strainer tube (18) that water purification enters into the filtering layer below by the filtering layer (19) that the pebbles that 4 layers of particle diameter and thickness have nothing in common with each other is formed, be pooled to and filter the below discharge filtering basin of house steward from filtering basin, recirculation is used for blast furnace slag flushing after hot water house steward (14) derives;
When 2) grain slag ulking thickness surpasses 0.3 meter in pond to be filtered (1) or the flushing cinder time above 2 hours, close the sluice valve (3) of filtering basin (1), close the hot-water valve (10) of filtering basin (1) simultaneously, start the exhaust-valve (12) of filtering basin 1, start drain pump group (13), the water emptying with in the filtering basin (1) makes the wet grain slag of being piled up in the filtering basin 1 become the solid carbon dioxide slag, the solid carbon dioxide slag is transported, and filtering basin (1) are standby; When closing the sluice valve (3) of filtering basin (1), open the sluice valve (4) of filtering basin (2), make slag-water slurry flow to filtering basin (2), in filtering basin (2), proceed slag treatment technology;
3) filtering basin (1) and filtering basin (2) are used alternatingly, and above-mentioned slag treatment technology is carried out continuously.
2. according to the treatment process of claim 1, it is characterized in that the water purification of deriving through the hot water house steward in the step 1) is used further to blast furnace slag flushing after overcooling.
3. equipment that is used for the blast furnace smelting slag treatment process of claim 1 comprises:
1) filtering basin: be concrete structure, mainly form by strainer tube (18), filtering layer (19), protective frame (20), grain slag layer (21) and water layer (22);
Wherein, strainer tube (18) is layed in the below of filtering layer (19); Filtering layer (19) is made up of the pebbles that 4 layers of particle diameter and thickness have nothing in common with each other, and specification from the bottom to top is respectively: 1) the 1st layer of pebbles: high 700～900cm, granularity 16～25mm; 2) the 2nd layer of pebbles: high 70～120cm, granularity 8～16mm; 3) the 3rd layer of pebbles: high 70～120cm, granularity 4～8mm; 4) the 4th layer of pebbles: high 400～600cm, granularity 2～4mm; Protective frame (20) is positioned at the top of filtering layer, is welded into the steel grating structure by Q235A steel plate or steel pipe, its end face and filtering layer pebbles end face level; It above protective frame the grain slag layer (21) of high 150～250mm; The top of grain slag layer is to surpass 1.5 meters high water layers (22);
2) emptying system: form by the exhaust-valve (9) of filtering basin (2), exhaust-valve (12), emptying house steward (11) and the drain pump group (13) of filtering basin (1);
3) hot water emission system: form by the hot water valve (8) of filtering basin (2), hot water valve (10), hot water house steward (14) and the slag flushing pump group (15) of filtering basin (1);
4) the sluice valve (4) of the sluice valve (3) of sluice (5), filtering basin (1), filtering basin (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100872078A CN100352946C (en) | 2005-07-27 | 2005-07-27 | Technique and equipment for processing blast furnace smelting slag |
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| CNB2005100872078A CN100352946C (en) | 2005-07-27 | 2005-07-27 | Technique and equipment for processing blast furnace smelting slag |
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| CN1824812A true CN1824812A (en) | 2006-08-30 |
| CN100352946C CN100352946C (en) | 2007-12-05 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643803B (en) * | 2009-09-04 | 2010-11-03 | 南京钢铁股份有限公司 | Back washing technology for filtration flushing cinder simultaneously tapped from double tapholes in blast furnace bottom |
| CN101781691B (en) * | 2009-01-16 | 2011-11-16 | 中冶赛迪工程技术股份有限公司 | Blast-furnace slag processing system |
| CN103540696A (en) * | 2012-07-16 | 2014-01-29 | 北京明诚环保科技有限公司 | Vapor-proof device for blast furnace slag treating system |
| CN105603136A (en) * | 2015-11-27 | 2016-05-25 | 山东钢铁股份有限公司 | Water-slag isolator for water granulated slag of blast furnace and water-slag separation method |
| CN110923378A (en) * | 2019-12-24 | 2020-03-27 | 中冶京诚工程技术有限公司 | Blast furnace grain slag filtering system |
| WO2021057365A1 (en) * | 2019-09-25 | 2021-04-01 | 山东奇士登润滑科技有限公司 | Comprehensive system for blast furnace slag removal and transport and slag bath toxic water vapor pollution treatment |
| CN113897466A (en) * | 2021-09-01 | 2022-01-07 | 鞍钢集团工程技术有限公司 | Blast furnace slag flushing device and method |
| CN114053768A (en) * | 2021-11-24 | 2022-02-18 | 中冶京诚工程技术有限公司 | Method for preventing hardening of filter material of blast furnace water slag bottom filtering system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1186462C (en) * | 2001-07-03 | 2005-01-26 | 昆明钢铁股份有限公司 | Method for using air or water to reversely flush grain slag filter of blast furnace |
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2005
- 2005-07-27 CN CNB2005100872078A patent/CN100352946C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101781691B (en) * | 2009-01-16 | 2011-11-16 | 中冶赛迪工程技术股份有限公司 | Blast-furnace slag processing system |
| CN101643803B (en) * | 2009-09-04 | 2010-11-03 | 南京钢铁股份有限公司 | Back washing technology for filtration flushing cinder simultaneously tapped from double tapholes in blast furnace bottom |
| CN103540696A (en) * | 2012-07-16 | 2014-01-29 | 北京明诚环保科技有限公司 | Vapor-proof device for blast furnace slag treating system |
| CN105603136A (en) * | 2015-11-27 | 2016-05-25 | 山东钢铁股份有限公司 | Water-slag isolator for water granulated slag of blast furnace and water-slag separation method |
| WO2021057365A1 (en) * | 2019-09-25 | 2021-04-01 | 山东奇士登润滑科技有限公司 | Comprehensive system for blast furnace slag removal and transport and slag bath toxic water vapor pollution treatment |
| CN110923378A (en) * | 2019-12-24 | 2020-03-27 | 中冶京诚工程技术有限公司 | Blast furnace grain slag filtering system |
| CN113897466A (en) * | 2021-09-01 | 2022-01-07 | 鞍钢集团工程技术有限公司 | Blast furnace slag flushing device and method |
| CN114053768A (en) * | 2021-11-24 | 2022-02-18 | 中冶京诚工程技术有限公司 | Method for preventing hardening of filter material of blast furnace water slag bottom filtering system |
| CN114053768B (en) * | 2021-11-24 | 2022-12-20 | 中冶京诚工程技术有限公司 | Method for preventing hardening of filter material of blast furnace water slag bottom filtering system |
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| CN100352946C (en) | 2007-12-05 |
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