CN102586520B - Method for carrying out voltage-sharing bleeding on furnace top of blast furnace - Google Patents
Method for carrying out voltage-sharing bleeding on furnace top of blast furnace Download PDFInfo
- Publication number
- CN102586520B CN102586520B CN 201210006622 CN201210006622A CN102586520B CN 102586520 B CN102586520 B CN 102586520B CN 201210006622 CN201210006622 CN 201210006622 CN 201210006622 A CN201210006622 A CN 201210006622A CN 102586520 B CN102586520 B CN 102586520B
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- blast furnace
- furnace
- pressure
- weighing batch
- material tank
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000000740 bleeding effect Effects 0.000 title abstract 4
- 238000005303 weighing Methods 0.000 claims abstract description 56
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000007599 discharging Methods 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 17
- 239000000428 dust Substances 0.000 claims abstract description 8
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 23
- 239000003034 coal gas Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 abstract description 10
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000003912 environmental pollution Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000000571 coke Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention belongs to a method for carrying out voltage-sharing bleeding on the furnace top of a blast furnace by using nitrogen. The method comprises the following steps of: feeding pressure nitrogen into a weighing material tank when voltage-sharing is carried out on the furnace top of a blast furnace; opening a material feeding gate and leading furnace burden to enter into the blast furnacewhen the pressure in the weighing material tank is higher than the pressure in the blast furnace by at least 1kPa, always feeding pressure nitrogen into a material tank so that the pressure in the weighing material tank is higher than the pressure in the blast furnace by at least 1kPa; immediately stopping feeding the pressure nitrogen into the weighing material tank after the furnace burden completely enters the blast furnace; and during bleeding, removing the dust of gases in the weighing material tank through a cyclone dust separator and then discharging the gases into air. According to the method, the pressure nitrogen is fed into the weighing material tank for carrying out voltage-sharing bleeding on the weighing material tank of the blast furnace so that the problems such as environmental pollution and resource wasting caused by the direct discharging-to-atmosphere of voltage-sharing bled coke oven gas in the traditional technology are solved. The method has significant economicbenefit and social benefit, is simple in operation, safe, reliable and low in operation and maintenance cost.
Description
Technical field
The invention belongs to the Iron And Steel Industry technical field, relate to a kind of blast furnace furnace roof pressure-equalizing and discharging method.
Background technology
The environmental requirement that steel industry is increasingly serious and Market Situation require iron and steel enterprise must accomplish energy-saving and emission-reduction, reduce cost.At present, blast furnace ironmaking operation discharge amount of pollution occupies the major part of whole steel industry quantity discharged, therefore, reduces ironmaking operation quantity discharged and seems particularly necessary.
At present, worldwide batch can pressure-equalizing and discharging process all adopts the semicentennial traditional pressure-equalizing and discharging technology of having continued to use, it is consistent with blast furnace top pressure namely to utilize half purified gas, nitrogen all to be depressed into to batch can, stops then to the batch can pressurising, opens blanking lock discharge in the blast furnace; When diffusing, the raw gas in the batch can directly enters in the atmosphere after the thick dedusting of tornado dust collector, so that batch can diffuses to normal pressure, satisfies the batch can material feeding.This traditional pressure-equalizing and discharging mode causes a large amount of poisonous coal gas also to enter in the air, has not only polluted environment, and is a kind of huge economic waste.By the ton iron amount of diffusing 7～9Nm
3Calculate, at present, China's year coal gas diffusion amount reaches about 50 billion cubic meters, and (the blast furnace gas unit price is by 0.11 yuan/Nm up to 5.5 hundred million yuans for financial loss
3Calculate).
Therefore, if can develop a kind of new pressure-equalizing and discharging technology, stop pressure-equalizing and discharging coal gas and directly sky is diffused, can alleviate environmental pollution, reach the target of setting up the environmental friendliness section steel works, can reclaim a large amount of coal gas resources again, obtain good economic benefit, have vast market prospect.
Summary of the invention
The technical problem to be solved in the present invention is at the deficiencies in the prior art, a kind of environmental pollution and wasting of resources problem that causes of diffusing that can solve owing to coal gas is provided, and easy to operate, safe and reliable, the nitrogen that utilizes that operation and maintenance cost is cheap carries out the method for blast furnace furnace roof pressure-equalizing and discharging.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of method of blast furnace furnace roof pressure-equalizing and discharging, its step: when the blast furnace furnace roof is all pressed, in the weighing batch can, feed pressure nitrogen gas; When the pressure in the weighing batch can equals pressure in the blast furnace, stop in the weighing batch can, feeding pressure nitrogen gas; The blanking lock is opened, the furnace charge in the weighing batch can is entered in the blast furnace; After furnace charge enters blast furnace fully, be under the opened condition keeping the blanking lock, in the weighing batch can, feed pressure nitrogen gas again, the coal gas in the weighing batch can is caught up with in the blast furnace; When the blast furnace gas volume percent in the weighing batch can less than 20% the time, the blanking lock cuts out; Stop then in the weighing batch can, feeding pressure nitrogen gas; When diffusing, open and diffuse valve, the gas in the weighing batch can enters in the atmosphere after the tornado dust collector dedusting.
The invention has the beneficial effects as follows: in the weighing batch can, feed pressure nitrogen gas, blast furnace weighing batch can is carried out pressure-equalizing and discharging, solve problems such as the raw gas environmental pollution that directly discharging causes to sky of pressure-equalizing and discharging in the traditional technology and the wasting of resources, had great economic benefit and a social benefit.In addition, the original relatively technology of the present invention, simple to operate, safe and reliable, fixed investment and operation expense are cheap.
Embodiment
For understanding the present invention better, below the invention will be further described:
Embodiment 1
A kind of method of blast furnace furnace roof pressure-equalizing and discharging, its step: when the blast furnace furnace roof is all pressed, in the weighing batch can, feed pressure nitrogen gas; When the pressure in the weighing batch can when pressure in the blast furnace equates, stop in the weighing batch can, feeding pressure nitrogen gas; The blanking lock is opened, the furnace charge in the weighing batch can is entered in the blast furnace; After furnace charge enters blast furnace fully, be under the opened condition keeping the blanking lock, in the weighing batch can, feed pressure nitrogen gas again, the coal gas in the weighing batch can is caught up with in the blast furnace; When the blast furnace gas volume percent in the weighing batch can 20% the time, the blanking lock cuts out; Stop then in the weighing batch can, feeding pressure nitrogen gas; When diffusing, open and diffuse valve, the gas in the weighing batch can enters in the atmosphere after the tornado dust collector dedusting.
Embodiment 2
A kind of method of blast furnace furnace roof pressure-equalizing and discharging, its step: when the blast furnace furnace roof is all pressed, in the weighing batch can, feed pressure nitrogen gas; When the pressure in the weighing batch can when pressure in the blast furnace equates, stop in the weighing batch can, feeding pressure nitrogen gas; The blanking lock is opened, the furnace charge in the weighing batch can is entered in the blast furnace; After furnace charge enters blast furnace fully, be under the opened condition keeping the blanking lock, in the weighing batch can, feed pressure nitrogen gas again, the coal gas in the weighing batch can is caught up with in the blast furnace; When the blast furnace gas volume percent in the weighing batch can 12% the time, the blanking lock cuts out; Stop then in the weighing batch can, feeding pressure nitrogen gas; When diffusing, open and diffuse valve, the gas in the weighing batch can enters in the atmosphere after the tornado dust collector dedusting.
Embodiment 3
A kind of method of blast furnace furnace roof pressure-equalizing and discharging, its step: when the blast furnace furnace roof is all pressed, in the weighing batch can, feed pressure nitrogen gas; When the pressure in the weighing batch can when pressure in the blast furnace equates, stop in the weighing batch can, feeding pressure nitrogen gas; The blanking lock is opened, the furnace charge in the weighing batch can is entered in the blast furnace; After furnace charge enters blast furnace fully, be under the opened condition keeping the blanking lock, in the weighing batch can, feed pressure nitrogen gas again, the coal gas in the weighing batch can is caught up with in the blast furnace; When the blast furnace gas volume percent in the weighing batch can 5% the time, the blanking lock cuts out; Stop then in the weighing batch can, feeding pressure nitrogen gas; When diffusing, open and diffuse valve, the gas in the weighing batch can enters in the atmosphere after the tornado dust collector dedusting.
From result of experiment, after adopting nitrogen to carry out blast furnace furnace roof pressure-equalizing and discharging, owing in the weighing batch can, feed pressure nitrogen gas, make pressure nitrogen gas constantly catch up with the coal gas in the weighing batch can in the blast furnace again, therefore realized when diffusing diffusing the replacement coal gas diffusion with nitrogen, alleviate environmental pollution, realized energy-saving and emission-reduction and coal-gas recovering.
The above disclosed only preferred embodiment for the present invention there being more deeply concrete understanding take not is in order to limit scope of the present invention.The equivalence of doing under the prerequisite that does not break away from conception principle of the present invention changes and revises, and still belongs to protection scope of the present invention.
Claims (1)
1. the method for a blast furnace furnace roof pressure-equalizing and discharging when the steps include: that the blast furnace furnace roof is all pressed, feeds pressure nitrogen gas in the weighing batch can; When the pressure in the weighing batch can equals pressure in the blast furnace, stop in the weighing batch can, feeding pressure nitrogen gas; The blanking lock is opened, the furnace charge in the weighing batch can is entered in the blast furnace; After furnace charge enters blast furnace fully, be under the opened condition keeping the blanking lock, in the weighing batch can, feed pressure nitrogen gas again, the coal gas in the weighing batch can is caught up with in the blast furnace; When the blast furnace gas volume percent in the weighing batch can less than 20% the time, the blanking lock cuts out; Stop then in the weighing batch can, feeding pressure nitrogen gas; When diffusing, open and diffuse valve, the gas in the weighing batch can enters in the atmosphere after the tornado dust collector dedusting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210006622 CN102586520B (en) | 2012-01-10 | 2012-01-10 | Method for carrying out voltage-sharing bleeding on furnace top of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210006622 CN102586520B (en) | 2012-01-10 | 2012-01-10 | Method for carrying out voltage-sharing bleeding on furnace top of blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102586520A CN102586520A (en) | 2012-07-18 |
| CN102586520B true CN102586520B (en) | 2013-09-25 |
Family
ID=46475741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210006622 Expired - Fee Related CN102586520B (en) | 2012-01-10 | 2012-01-10 | Method for carrying out voltage-sharing bleeding on furnace top of blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102586520B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2785093B2 (en) * | 1992-12-15 | 1998-08-13 | 新日本製鐵株式会社 | Pressure equalization method in bell blast furnace charging equipment |
| CN101875988A (en) * | 2010-07-30 | 2010-11-03 | 中冶南方工程技术有限公司 | Pressure-equalizing and discharging process for J-shaped sealing water pipe type blast furnace top |
| CN101892336A (en) * | 2010-06-25 | 2010-11-24 | 鞍山亨通高炉设备工程技术有限公司 | Coal-gas recovering process and device of charging, equalizing and bleeding of blast furnace |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54132407A (en) * | 1978-04-05 | 1979-10-15 | Ishikawajima Harima Heavy Ind Co Ltd | Uniformizing method for pressure at furnace top |
| JPS56169712A (en) * | 1980-06-03 | 1981-12-26 | Kobe Steel Ltd | Equalization of pressure of uniform-pressure chamber at top of blast furnace |
-
2012
- 2012-01-10 CN CN 201210006622 patent/CN102586520B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2785093B2 (en) * | 1992-12-15 | 1998-08-13 | 新日本製鐵株式会社 | Pressure equalization method in bell blast furnace charging equipment |
| CN101892336A (en) * | 2010-06-25 | 2010-11-24 | 鞍山亨通高炉设备工程技术有限公司 | Coal-gas recovering process and device of charging, equalizing and bleeding of blast furnace |
| CN101875988A (en) * | 2010-07-30 | 2010-11-03 | 中冶南方工程技术有限公司 | Pressure-equalizing and discharging process for J-shaped sealing water pipe type blast furnace top |
Non-Patent Citations (1)
| Title |
|---|
| 1_1000m_3高炉均压放散改造实践;赵建磊;《莱钢科技》;20070430(第4期);11-12 * |
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| Publication number | Publication date |
|---|---|
| CN102586520A (en) | 2012-07-18 |
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Granted publication date: 20130925 |