CN102586518A - Method for carrying out voltage-sharing bleeding on furnace top of blast furnace by using nitrogen - Google Patents
Method for carrying out voltage-sharing bleeding on furnace top of blast furnace by using nitrogen Download PDFInfo
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- CN102586518A CN102586518A CN2012100066245A CN201210006624A CN102586518A CN 102586518 A CN102586518 A CN 102586518A CN 2012100066245 A CN2012100066245 A CN 2012100066245A CN 201210006624 A CN201210006624 A CN 201210006624A CN 102586518 A CN102586518 A CN 102586518A
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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 furnace when 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 in the opening state of the whole material feeding gate 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 by using a cyclone dust separator and then discharging the gases into air. According to the method, the pressure nitrogen is pumped 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 waste caused by the direct discharging-to-atmosphere of voltage-sharing bled coke oven gas in the traditional technology are solved. The method has significant economic benefit 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
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 promptly 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 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 that the present invention will solve is the deficiency to 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 utilizing nitrogen to carry out 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 is higher than pressure in the blast furnace at least during 1kPa; The blanking lock is opened, and furnace charge gets in the blast furnace, in the whole opened condition of blanking lock; All the time in batch can, feed pressure nitrogen gas, be higher than high furnace pressure 1kPa at least all the time with the pressure of keeping in the weighing batch can; After furnace charge gets into blast furnace fully, after earlier the blanking lock cutting out, stop immediately 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 the problems such as the raw gas environmental pollution that directly discharging causes to sky and the wasting of resources of pressure-equalizing and discharging in the traditional technology, 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, do further description in the face of the present invention down:
Embodiment 1
A kind of method of utilizing nitrogen to carry out 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 is higher than pressure in the blast furnace and is 1kPa; The blanking lock is opened, and furnace charge gets in the blast furnace, in the whole opened condition of blanking lock; All the time in batch can, feed pressure nitrogen gas, be higher than high furnace pressure all the time at 1kPa～2k Pa with the pressure of keeping in the weighing batch can; After furnace charge gets into blast furnace fully, after earlier the blanking lock cutting out, stop immediately 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 utilizing nitrogen to carry out 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 is higher than pressure in the blast furnace and is 10kPa; The blanking lock is opened, and furnace charge gets in the blast furnace, in the whole opened condition of blanking lock; All the time in batch can, feed pressure nitrogen gas, be higher than high furnace pressure all the time at 10kPa～11kPa with the pressure of keeping in the weighing batch can; After furnace charge gets into blast furnace fully, after earlier the blanking lock cutting out, stop immediately 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 utilizing nitrogen to carry out 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 is higher than pressure in the blast furnace and is 20kPa; The blanking lock is opened, and furnace charge gets in the blast furnace, in the whole opened condition of blanking lock; All the time in batch can, feed pressure nitrogen gas, be higher than high furnace pressure all the time at 20kPa～21kPa with the pressure of keeping in the weighing batch can; After furnace charge gets into blast furnace fully, after earlier the blanking lock cutting out, stop immediately 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.
See from result of experiment; After adopting nitrogen to carry out blast furnace furnace roof pressure-equalizing and discharging; Because the pressure in the weighing batch can remains the pressure that is higher than in the blast furnace, stoped the coal gas in the blast furnace to get in the weighing batch can, realized when therefore diffusing diffusing the replacement coal gas diffusion with nitrogen; Alleviate environmental pollution, realized energy-saving and emission-reduction and coal-gas recovering.
Above disclosed being merely has the preferred embodiment of more deeply specifically understanding and taking to the present invention, is not in order to limit scope of the present invention.The equivalence of under the prerequisite that does not break away from conception principle of the present invention, being done changes and revises, and still belongs to protection scope of the present invention.
Claims (1)
1. method of utilizing nitrogen to carry out 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 is higher than pressure in the blast furnace at least during 1kPa; The blanking lock is opened, and furnace charge gets in the blast furnace, in the whole opened condition of blanking lock; All the time in batch can, feed pressure nitrogen gas, be higher than high furnace pressure 1kPa at least all the time with the pressure of keeping in the weighing batch can; After furnace charge gets into blast furnace fully, after earlier the blanking lock cutting out, stop immediately 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 |
|---|---|---|---|
| CN2012100066245A CN102586518A (en) | 2012-01-10 | 2012-01-10 | Method for carrying out voltage-sharing bleeding on furnace top of blast furnace by using nitrogen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100066245A CN102586518A (en) | 2012-01-10 | 2012-01-10 | Method for carrying out voltage-sharing bleeding on furnace top of blast furnace by using nitrogen |
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| CN102586518A true CN102586518A (en) | 2012-07-18 |
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| CN2012100066245A Pending CN102586518A (en) | 2012-01-10 | 2012-01-10 | Method for carrying out voltage-sharing bleeding on furnace top of blast furnace by using nitrogen |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111411182A (en) * | 2020-05-20 | 2020-07-14 | 宝钢工程技术集团有限公司 | Bell-less top charging device and charging method thereof |
| CN111809010A (en) * | 2020-06-19 | 2020-10-23 | 中钢设备有限公司 | Blast furnace top gas pressure-equalizing bleeding system and control method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56169712A (en) * | 1980-06-03 | 1981-12-26 | Kobe Steel Ltd | Equalization of pressure of uniform-pressure chamber at top of blast furnace |
| 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 |
| CN2647866Y (en) * | 2003-08-06 | 2004-10-13 | 吴蔓洁 | Homogenizing pressure apparatus for air density case of blast furnace top without bell |
| 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 |
-
2012
- 2012-01-10 CN CN2012100066245A patent/CN102586518A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56169712A (en) * | 1980-06-03 | 1981-12-26 | Kobe Steel Ltd | Equalization of pressure of uniform-pressure chamber at top of blast furnace |
| 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 |
| CN2647866Y (en) * | 2003-08-06 | 2004-10-13 | 吴蔓洁 | Homogenizing pressure apparatus for air density case of blast furnace top without bell |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 唐恩 等: "高炉炼铁节能减排实用技术浅述", 《2011年全国冶金节能减排与低碳技术发展研讨会文集》, 31 December 2011 (2011-12-31), pages 308 - 313 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111411182A (en) * | 2020-05-20 | 2020-07-14 | 宝钢工程技术集团有限公司 | Bell-less top charging device and charging method thereof |
| CN111809010A (en) * | 2020-06-19 | 2020-10-23 | 中钢设备有限公司 | Blast furnace top gas pressure-equalizing bleeding system and control method thereof |
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Application publication date: 20120718 |