CN103484580A - Method and device for recovering molten blast furnace slag sensible heat - Google Patents
Method and device for recovering molten blast furnace slag sensible heat Download PDFInfo
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- CN103484580A CN103484580A CN201310421159.6A CN201310421159A CN103484580A CN 103484580 A CN103484580 A CN 103484580A CN 201310421159 A CN201310421159 A CN 201310421159A CN 103484580 A CN103484580 A CN 103484580A
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P10/20—Recycling
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention belongs to the technical field of energy recovery, and particularly relates to a method and device for recovering molten blast furnace slag sensible heat. The process of the method sequentially includes the following steps that (1) blast furnace slag enters a segmented bottom blowing composite molten slag trough, compressed air is blown in from the bottom of the bottom blowing composite molten slag trough, and at the moment a heat accumulator is heated to be within the range from 1100 DEG C to 1250 DEG C; (2) molten slag of which the temperature is reduced to be within the range of 700 DEG C to 800 DEG C enters an old slag processing system through a connecting unit, and then follow-up processing is conducted on slag; (3) when slag stops being discharged from a blast furnace, air is still blown in from the bottom of the bottom blowing composite molten slag trough, and air is heated to be within the range from 800 DEG C to 900 DEG C when passing through the heat accumulator; (4) hot air is used for power generation after being dedusted, and then cooling water replaces heat for production. Compared with the prior art, the method and device have the advantages that through the improvement, heat can be efficiently recovered, the temperature of combustion air by a hot blast heater can be increased, the device and method can be also used for waste heat power generation, and then the purpose of energy reutilization is achieved.
Description
Technical field
The invention belongs to ferrous metallurgy energy-saving and emission-reduction, secondary energy recovery technology field, particularly a kind of method and device thereof that reclaims molten blast furnace slag sensible heat.
Background technology
Iron And Steel Industry is the important foundation industry of Chinese national economy, Iron And Steel Industry fast development from China since the nineties in 20th century, crude steel output in 2012 reaches 7.2 hundred million tons, wherein blase furnace cast iron (long flow process crude steel is produced) output approaches 6.59 hundred million tons, growth along with iron and steel output, the total amount that Iron And Steel Industry produces solid waste gets more and more, in solid waste, blast furnace slag has accounted for again very large ratio.The quantity discharged of blast furnace slag changes with the difference of ore grade and smelting process.In general, when the furnace charge grade reaches 60%～66%, often be smelt 1 ton of pig iron and will produce 250～300 kilograms of slags, calculate by this, the blast furnace slag output in China every year is also 1.65～1.98 hundred million tons of left and right.
The energy consumption of Iron And Steel Industry simultaneously accounts for again 10%～15% of national total energy consumption, at present main Steel Production Flow Chart is long flow process, comprise coking process, sintering circuit, blast furnace ironmaking operation, converter steelmaking operation and steel rolling process, and the resource of blast furnace ironmaking operation and energy expenditure are all maximum, account for again 77% left and right of whole Iron and Steel Production operation.The tapping temperature of blast furnace slag is generally at 1400 ℃～1500 ℃, and 1 ton of contained heat of blast furnace slag is equivalent to the 64kg standard coal, calculates like this China and takes away heat because of blast furnace slag every year and be equivalent to 1056～1267.2 tons of standard coals.
China's blast-furnace cement sensible heat utilization ratio is extremely low at present, and most enterprises all adopts the grain slag treatment process, and so-called utilization is exactly, and Northern Enterprises is warmed oneself with blast furnace slag quenching water winter, due to the restriction be subject to for conditions such as thermal region, flows, and flushing cinder water contains a large amount of alkaline matters to factors such as pump and corrosive pipelines, the slag heat utilization rate is extremely low, and spring, summer, three seasons of autumn can not adapt to, a large amount of hot water, steam impact are produced.Therefore the sensible heat of blast furnace slag reclaims and is very important problem, in the urgent need to address.
Summary of the invention
The purpose of this invention is to provide a kind of method and device thereof that reclaims molten blast furnace slag sensible heat, under the prerequisite that does not change existing most of blast furnace water slag-flushing technique, by the transformation to the melting slag runner, reach the sensible heat that reclaims blast furnace slag, the purpose of reusing of energy source.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of method that reclaims molten blast furnace slag sensible heat, its flow process is carried out in order as follows: the blast furnace slag that 1) temperature is reached to 1400～1500 ℃ enters the bottom blowing composite molten slag runner of segmentation, by the pressurized air of 1.5～2.0MPa, the speed with 8～10 meter per seconds is blown into from bottom blowing composite molten slag runner bottom simultaneously, stir slag when guaranteeing slag fluidity, the radiant heat of realizing bottom blowing composite molten slag runner top accumulation of heat masonry absorbs, and at this moment heat storage is heated to 1100～1250 ℃; 2) be that temperature is reduced to the slag of 700～800 ℃ and enters old slag disposal system by connector element, slag is made to subsequent disposal; 3) be when blast furnace stops slagging tap, bottom blowing composite molten slag runner bottom still is blown into air, at the process Air by heat storage, is heated to 800～900 ℃; 4) will be after the warm air dedusting introduce boiler of power generation by waste heat for generating, the water coolant of slag runner by interchanger replace heat for the production of.
The combustion air that also can be used as hotblast stove after described warm air dedusting is utilized.
Described bottom blowing composite molten slag runner, it is characterized in that, comprise the outer slag runner of cement, the support of ditch body, ditch body and operculum colpi, the bottom of the outer slag runner of cement is provided with the ditch body and supports, the top that the ditch body supports is provided with ditch body and the operculum colpi that refractory materials is made, the internal surface of operculum colpi is provided with the accumulation of heat masonry, surround the slag runner between ditch body and operculum colpi, ditch body bottom is provided with copper cooling wall, establish water-cooled tube in copper cooling wall, the bottom of copper cooling wall is provided with the bottom blowing blast main, and the bottom blowing blast main is provided with injection tube and upwards communicates with the slag runner.
Compared with prior art, the invention has the beneficial effects as follows:
Present method not only can the efficient recovery molten blast furnace slag sensible heat, and can take full advantage of existing slag disposal system, by the local flow improvement of blast furnace discharge yard, realize improving the hotblast stove combustion air temperature again by high efficiente callback heat energy, also can be used for cogeneration, reach the purpose of reusing of energy source.
The accompanying drawing explanation
Fig. 1 is bottom blowing composite molten slag runner example structure schematic diagram of the present invention;
Fig. 2 is the schematic diagram of one of the invention process flow process;
Fig. 3 is two schematic diagram of the invention process flow process.
In figure: the outer slag runner 2-ditch body of 1-cement supports 3-ditch body 4-operculum colpi 5-accumulation of heat masonry 6-slag runner 7-copper cooling wall 8-water-cooled tube 9-bottom blowing blast main 10-injection tube 11-blast furnace 12-bottom blowing composite molten slag runner 13-connector element 14-interchanger 15-boiler of power generation by waste heat 16-fly-ash separator
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
See Fig. 1, it is bottom blowing composite molten slag runner example structure schematic diagram of the present invention, comprise the outer slag runner 1 of cement, the ditch body supports 2, ditch body 3 and operculum colpi 4, the bottom of the outer slag runner 1 of cement is provided with the ditch body and supports 2, the top of ditch body support 2 is provided with ditch body 3 and the operculum colpi 4 that refractory materials is made, the internal surface of operculum colpi 4 is provided with accumulation of heat masonry 5, surround slag runner 6 between ditch body 3 and operculum colpi 4, ditch body 3 bottoms are provided with copper cooling wall 7, establish water-cooled tube 8 in copper cooling wall 7, the bottom of copper cooling wall 7 is provided with bottom blowing blast main 9, bottom blowing blast main 9 is provided with injection tube 10 and upwards communicates with slag runner 6.Water-cooled tube 8 connects interchanger and carries out energy recovery, bottom blowing blast main 9 is connected with gas blower, physical property according to molten blast furnace slag: the heat transfer rate is slow, viscosity reduces the characteristics such as sharply rising along with temperature, answer quantity and the position of reasonable Arrangement injection tube 10, make the radiant heat of molten blast furnace slag be absorbed by heat storage and can keep suitable mobility.
See Fig. 2, it is the schematic diagram of one of a kind of method implementing procedure that reclaims molten blast furnace slag sensible heat of the present invention, radiant heat by bottom blowing composite molten slag runner to molten blast furnace slag is absorbed, thermal exchange produces warm air and hot water, realize the purpose that blast-furnace cement sensible heat reclaims, the temperature of 1) at first blast furnace 11 being discharged reaches the blast furnace slag of 1400～1500 ℃ and enters the bottom blowing composite molten slag runner 12 of segmentation, by the pressurized air of 1.5～2.0MPa, the speed with 8～10 meter per seconds is blown into from bottom blowing composite molten slag runner bottom simultaneously, stir slag when guaranteeing slag fluidity, the radiant heat of realizing bottom blowing composite molten slag runner top accumulation of heat masonry absorbs, at this moment heat storage is heated to 1100～1250 ℃, and the air that bottom is blown into also has more than 900 ℃ in exit, 2) be secondly that temperature is reduced to the slag of 700～800 ℃ and enters old slag disposal system by connector element, slag is made to subsequent disposal, 3) be again when blast furnace stops slagging tap, bottom blowing composite molten slag runner bottom still is blown into air, at the process Air by heat storage, is heated to 800～900 ℃, 4) be finally slag runner water coolant (approximately 80 ℃) by interchanger 14 by heat cement out for the production of, and introduce boiler of power generation by waste heat 15 after the warm air dedusting for generating, in figure, the boiler of power generation by waste heat prime carries cleaning apparatus.
See Fig. 3, it is two schematic diagram of a kind of method implementing procedure that reclaims molten blast furnace slag sensible heat of the present invention, radiant heat by bottom blowing composite molten slag runner to molten blast furnace slag is absorbed, thermal exchange produces warm air and hot water, realize the purpose that blast-furnace cement sensible heat reclaims, the temperature of 1) at first blast furnace 11 being discharged reaches the blast furnace slag of 1400～1500 ℃ and enters the bottom blowing composite molten slag runner 12 of segmentation, by the pressurized air of 1.5～2.0MPa, the speed with 8～10 meter per seconds is blown into from bottom blowing composite molten slag runner bottom simultaneously, stir slag when guaranteeing slag fluidity, the radiant heat of realizing bottom blowing composite molten slag runner top accumulation of heat masonry absorbs, at this moment heat storage is heated to 1100～1250 ℃, and the air that bottom is blown into also has more than 900 ℃ in exit, 2) be secondly that temperature is reduced to the slag of 700～800 ℃ and enters old slag disposal system by connector element, slag is made to subsequent disposal, 3) be again when blast furnace stops slagging tap, bottom blowing composite molten slag runner bottom still is blown into air, at the process Air by heat storage, is heated to 800～900 ℃, 4) be finally slag runner water coolant (approximately 80 ℃) by interchanger 14 by heat cement out for the production of, warm air combustion air as hotblast stove after fly-ash separator 16 is utilized.
Claims (3)
1. a method that reclaims molten blast furnace slag sensible heat, it is characterized in that, its flow process is carried out in order as follows: the blast furnace slag that 1) temperature is reached to 1400～1500 ℃ enters the bottom blowing composite molten slag runner of segmentation, by the pressurized air of 1.5～2.0MPa, the speed with 8～10 meter per seconds is blown into from bottom blowing composite molten slag runner bottom simultaneously, stir slag when guaranteeing slag fluidity, the radiant heat of realizing bottom blowing composite molten slag runner top accumulation of heat masonry absorbs, and at this moment heat storage is heated to 1100～1250 ℃; 2) be that temperature is reduced to the slag of 700～800 ℃ and enters old slag disposal system by connector element, slag is made to subsequent disposal; 3) be when blast furnace stops slagging tap, bottom blowing composite molten slag runner bottom still is blown into air, at the process Air by heat storage, is heated to 800～900 ℃; 4) will be after the warm air dedusting introduce boiler of power generation by waste heat for generating, the water coolant of slag runner by interchanger replace heat for the production of.
2. a kind of method that reclaims molten blast furnace slag sensible heat according to claim 1, is characterized in that, the combustion air that also can be used as hotblast stove after described warm air dedusting is utilized.
3. the bottom blowing composite molten slag runner of mentioning in the described method of claim 1, it is characterized in that, comprise the outer slag runner of cement, the support of ditch body, ditch body and operculum colpi, the bottom of the outer slag runner of cement is provided with the ditch body and supports, the top that the ditch body supports is provided with ditch body and the operculum colpi that refractory materials is made, the internal surface of operculum colpi is provided with the accumulation of heat masonry, surround the slag runner between ditch body and operculum colpi, ditch body bottom is provided with copper cooling wall, establish water-cooled tube in copper cooling wall, the bottom of copper cooling wall is provided with the bottom blowing blast main, and the bottom blowing blast main is provided with injection tube and upwards communicates with the slag runner.
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| CN201310421159.6A CN103484580B (en) | 2013-09-13 | 2013-09-13 | Method and device for recovering molten blast furnace slag sensible heat |
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| CN201310421159.6A CN103484580B (en) | 2013-09-13 | 2013-09-13 | Method and device for recovering molten blast furnace slag sensible heat |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105400918A (en) * | 2015-12-30 | 2016-03-16 | 中冶南方工程技术有限公司 | Cover plate for slag-iron runner of blast furnace |
| CN108278904A (en) * | 2017-01-05 | 2018-07-13 | 北京金熔节能环保科技有限公司 | A kind of pyrolytic semlting slag waste-heat recovery device and method |
| CN108870350A (en) * | 2018-07-19 | 2018-11-23 | 北京金熔节能环保科技有限公司 | A kind of tunnel type high temperature sludge waste heat Dry recovery device and method |
| CN111637776A (en) * | 2020-06-12 | 2020-09-08 | 东北大学 | Multi-level phase change recycling and storing device for waste heat of metallurgical high-temperature slag |
| CN114774603A (en) * | 2022-04-29 | 2022-07-22 | 马鞍山钢铁股份有限公司 | Recycling system for high-temperature radiant heat of blast furnace tapping channel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4426067A (en) * | 1983-01-07 | 1984-01-17 | The Calumite Company | Metallic sectional liquid-cooled runners |
| JPS62156213A (en) * | 1985-12-27 | 1987-07-11 | Sumitomo Metal Ind Ltd | Construction of spout for preliminary refining of molten iron |
| JPH0379709A (en) * | 1989-05-26 | 1991-04-04 | Godo Seitetsu Kk | Slag bath type smelting reduction producing apparatus for molten ferrous alloy and method thereof |
| CN101886149A (en) * | 2010-07-08 | 2010-11-17 | 无锡市东方环境工程设计研究所有限公司 | High temperature liquid slag recovery method |
-
2013
- 2013-09-13 CN CN201310421159.6A patent/CN103484580B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4426067A (en) * | 1983-01-07 | 1984-01-17 | The Calumite Company | Metallic sectional liquid-cooled runners |
| JPS62156213A (en) * | 1985-12-27 | 1987-07-11 | Sumitomo Metal Ind Ltd | Construction of spout for preliminary refining of molten iron |
| JPH0379709A (en) * | 1989-05-26 | 1991-04-04 | Godo Seitetsu Kk | Slag bath type smelting reduction producing apparatus for molten ferrous alloy and method thereof |
| CN101886149A (en) * | 2010-07-08 | 2010-11-17 | 无锡市东方环境工程设计研究所有限公司 | High temperature liquid slag recovery method |
Non-Patent Citations (1)
| Title |
|---|
| 陈登福 等: "液态高炉渣热量回收利用方法及问题", 《环境污染治理技术与设备》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105400918A (en) * | 2015-12-30 | 2016-03-16 | 中冶南方工程技术有限公司 | Cover plate for slag-iron runner of blast furnace |
| CN108278904A (en) * | 2017-01-05 | 2018-07-13 | 北京金熔节能环保科技有限公司 | A kind of pyrolytic semlting slag waste-heat recovery device and method |
| CN108278904B (en) * | 2017-01-05 | 2020-10-30 | 北京金熔节能环保科技有限公司 | High-temperature smelting slag waste heat recovery device and method |
| CN108870350A (en) * | 2018-07-19 | 2018-11-23 | 北京金熔节能环保科技有限公司 | A kind of tunnel type high temperature sludge waste heat Dry recovery device and method |
| CN111637776A (en) * | 2020-06-12 | 2020-09-08 | 东北大学 | Multi-level phase change recycling and storing device for waste heat of metallurgical high-temperature slag |
| CN114774603A (en) * | 2022-04-29 | 2022-07-22 | 马鞍山钢铁股份有限公司 | Recycling system for high-temperature radiant heat of blast furnace tapping channel |
| CN114774603B (en) * | 2022-04-29 | 2024-01-30 | 马鞍山钢铁股份有限公司 | Recycling system of high-temperature radiant heat of blast furnace tapping channel |
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