CN103421914A - Iron making method introducing exhaust gas of hot-blast stove into blast furnace air - Google Patents
Iron making method introducing exhaust gas of hot-blast stove into blast furnace air Download PDFInfo
- Publication number
- CN103421914A CN103421914A CN2012101698168A CN201210169816A CN103421914A CN 103421914 A CN103421914 A CN 103421914A CN 2012101698168 A CN2012101698168 A CN 2012101698168A CN 201210169816 A CN201210169816 A CN 201210169816A CN 103421914 A CN103421914 A CN 103421914A
- Authority
- CN
- China
- Prior art keywords
- blast
- blast furnace
- hot
- exhaust gas
- stove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
An iron making method introducing the exhaust gas of a hot-blast stove into blast furnace air comprises the following steps: the exhaust gas of the hot-blast stove is introduced to the inlet of a blast furnace blower, the blast furnace blower simultaneously draws off the exhaust gas of the hot-blast stove and air or a special blower is mounted to draw off the exhaust gas of the hot-blast stove, and the drawn exhaust gas of the hot-blast stove is introduced into the blast furnace air, is heated by the hot-blast stove and is blasted to the tuyere area of a blast furnace. The iron making method is characterized in that the exhaust gas of the hot-blast stove is introduced into the blast furnace air, is heated and is blasted to the tuyere area of the blast furnace. The iron making method needs heat compensation and realizes the compensation through improving the air temperature and the rich oxygen. The temperature of the preheating combustion supporting air of a preheating furnace is above 500DEG C, the combustion temperature can reach 1550DEG C only through using the blast furnace gas, the supply air temperature reaches above 1350DEG C, and the temperature of the exhaust gas decreases to below 100DEG C. The iron making method introducing the exhaust gas of the hot-blast stove into the blast furnace air greatly adjusts the output, reduces the coke ratio and reduces the CO2 emission.
Description
Technical field
The invention belongs to blast furnace ironmaking energy-conserving and emission-cutting technology field, is a kind of energy-conservation new iron smelting method-sneak into to blast furnace blast iron smelting method of exhaust gas of hot-blast stove that reduces discharging.It is applicable to all blast furnaces of wind-warm syndrome more than needed and oxygen enrichment ability.
Background technology
At present, all blast furnace ironmakings in China and even the world, adopt to Blast Furnace Injection coal dust or various oil or Sweet natural gas or all kinds of coal gas or plastic waste, to reduce expensive metallurgical coke more.These fuel of jetting, its objective is the combustibles utilized in these fuel, is to replace another kind of high energy price with a kind of low price energy, although it can reduce production costs, can not reduce discharging.And CO
2Discharge caused global concern, low-carbon (LC) ironmaking is that we smelt iron worker's obligation one can't decline.
Summary of the invention
The objective of the invention is to think that utilization replaces expensive metallurgical coke without any waste gas, high wind-warm syndrome and the oxygen enrichment of the hotblast stove of combustibles; And minimizing CO
2Quantity discharged.
To each class A fuel A of blast furnace blowing, comprise and contain CO at present
2Coal gas, its objective is that non-combustibles, comprise CO in order to utilize combustibles wherein
2, be regarded as impurity, or oxious component.The present invention sneaks into exhaust gas of hot-blast stove (the outer waste air that does not contain any combustibles) to blast furnace blast and is smelted iron, in both at home and abroad current or precedent.In ironmaking, oxygen enrichment 2-3% is advisable at present, surpasses just difficult acceptance of 5% stove; Wind-warm syndrome is high is advisable to 1250 ℃, surpasses also difficult acceptance of 1250 ℃ of stoves.Sneak into exhaust gas of hot-blast stove in blast furnace blast, situation has just thoroughly changed, and how high wind-warm syndrome can be accepted, and how many oxygen enrichments can be accepted, and even can smelt iron by pure oxygen, and this is the revolution of ironmaking.
The present invention is achieved in that the entrance (accompanying drawing one) of the waste gas of hotblast stove being introduced to blast furnace blowing engine, or separately adds a special fan and extract exhaust gas of hot-blast stove sneak into (accompanying drawing two) in blast furnace blast after pressurization.
One, the waste gas of hotblast stove is introduced to the entrance of blast furnace blowing engine (9), blast furnace blowing engine extracts exhaust gas of hot-blast stove and air through waste gas regulating valve (7), air inlet adjustment valve (8) simultaneously, gas mixture pressurizes through blast furnace blowing engine (9), after entering hotblast stove (3) heating by cold-air duct (10), then blast the tuyere zone (seeing accompanying drawing one) of blast furnace (1) by hot air duct (2);
It is by blast furnace (1), heating duct (2), hotblast stove (3), preheating oven (4), the compositions such as flue (5), chimney (6), waste gas regulating valve (7), air inlet adjustment valve (8), blast furnace blowing engine (9), cold-air duct (10), oxygen-enriching device (12).
Two, separately add a special fan (11) and extract exhaust gas of hot-blast stove by waste gas regulating valve (7) from flue (5), and blast cold-air duct (10), mix with the air blast of blast furnace.Mix wind after hotblast stove (3) heating, then blast the tuyere zone (seeing accompanying drawing two) of blast furnace (1) by heating duct (2);
It is by blast furnace (1), heating duct (2), hotblast stove (3), preheating oven (4), flue (5), chimney (6), waste gas regulating valve (7), air inlet adjustment valve (8), blast furnace blowing engine (9), cold-air duct (10), the compositions such as special fan (11), oxygen-enriching device (12).
The present invention has following advantage:
1, sneak into the iron smelting method of exhaust gas of hot-blast stove to blast furnace blast, oxygen enrichment percentage is unrestricted, and output can increase substantially, and even doubles.This brings great convenience for business organization produces when sluggish market, oxygen enrichment not, and high pressure, do not maintain the low smelting of blast furnace Johnson & Johnson and produce (protecting stove does not stop production); When be in great demand in market, adopt high pressure, high wind-warm syndrome, high oxygen enrichment percentage, height to sneak into exhaust gas of hot-blast stove, output can improve several times of needs with satisfying the market.
2, sneak into the iron smelting method of exhaust gas of hot-blast stove to blast furnace blast, this part exhaust gas of hot-blast stove of sneaking into blasts blast furnace tuyere area after hotblast stove heating, can bring a part of heat into to blast furnace, this with to each class A fuel A of tuyere injection, comprise all kinds of combustible gas differences, what they sprayed into is all cold burden.
3, sneak into the iron smelting method of exhaust gas of hot-blast stove to blast furnace blast, not only can save coke, the more important thing is and can reduce in a large number CO
2Discharge.
But, 4, more than establishing preheating oven preheated-combustion-supporting wind to 500 ℃, guarantee only with blast furnace gas, can make temperature of combustion reach more than 1550 ℃.Can take full advantage of the exhaust gas of hot-blast stove waste heat, the exhaust gas of hot-blast stove temperature is dropped to below 100 ℃ simultaneously, but save energy.
5, enter the stove wind-warm syndrome unrestricted, the potentiality that can fully excavate hotblast stove improve wind-warm syndrome.
The accompanying drawing explanation:
Figure mono-, with blast furnace blowing engine, extract the schema that exhaust gas of hot-blast stove is sneaked into blast furnace blast
Figure bis-, with special fan, extract the schema that exhaust gas of hot-blast stove is sneaked into blast furnace blast
Embodiment:
1. with reference to accompanying drawing one, the combustion exhaust of hotblast stove, after preheating oven (4) conducts heat cooling, enters atmosphere by flue (5) through chimney (6).The air inlet of blast furnace blowing engine (9), a part is to extract atmosphere through variable valve (8), another part is to extract exhaust gas of hot-blast stove through waste gas regulating valve (7) from flue (5).The ratio that blast furnace blowing engine extracts atmosphere and exhaust gas of hot-blast stove is by variable valve (7) and (8), automatically to be controlled by the blast furnace watchroom according to the furnace temperature in blast furnace, oxygen enrichment percentage and wind-warm syndrome.The air that blast furnace blowing engine extracts to scale and exhaust gas of hot-blast stove enter hotblast stove (3) and heat after pressurization by cold-air duct (10) after, then blast the tuyere zone of blast furnace (1) by hot air duct (2).
2. with reference to accompanying drawing two, the combustion exhaust of hotblast stove, after preheating oven (4) conducts heat cooling, enters atmosphere by flue (5) through chimney (6).Special fan (11) extracts exhaust gas of hot-blast stove and blasts cold-air duct (10) from flue (5) by waste gas regulating valve (7), with the air blast of blast furnace, mixes.Mix wind after hotblast stove (3) heating, then blast the tuyere zone of blast furnace (1) by heating duct (2).The ratio of blast furnace blast amount and exhaust gas of hot-blast stove amount is by variable valve (7) and (8), automatically to be controlled by the blast furnace watchroom according to the furnace temperature in blast furnace, oxygen enrichment percentage and wind-warm syndrome.
Blast the oxygen of tuyere zone and red-hot carbon and generate carbonic acid gas:
C+O
2＝CO
2.....(1)
Newborn carbonic acid gas and the carbonic acid gas brought from exhaust gas of hot-blast stove and red-hot carbon all generate carbon monoxide:
CO
2+C＝2CO........(2)
Carbon monoxide is the reductive agent that blast-furnace smelting needs.Formula (1) is thermopositive reaction, and formula (2) is thermo-negative reaction.The carbonic acid gas brought from exhaust gas of hot-blast stove is thermo-negative reaction with reacting of red-hot carbon, and this part heat compensates by improving wind-warm syndrome and oxygen enrichment.
Claims (3)
1. an iron smelting method of sneaking into exhaust gas of hot-blast stove to blast furnace blast, it is the waste gas of hotblast stove to be introduced to the entrance of blast furnace blowing engine (9), blast furnace blowing engine extracts exhaust gas of hot-blast stove and air through waste gas regulating valve (7), air inlet adjustment valve (8) simultaneously, gas mixture pressurizes through blast furnace blowing engine (9), after entering hotblast stove (3) heating by cold-air duct (10), then blast the tuyere zone of blast furnace (1) by hot air duct (2).
Or separately add a special fan (11) and extract exhaust gas of hot-blast stove and blast cold-air duct (10) from flue (5) by waste gas regulating valve (7), with the air blast of blast furnace, mix.Mix wind after hotblast stove (3) heating, then blast the tuyere zone of blast furnace (1) by heating duct (2).
It is characterized in that this iron smelting method is to sneak into exhaust gas of hot-blast stove to blast furnace blast, after heating, spray into blast furnace tuyere area.
2. iron smelting method of sneaking into exhaust gas of hot-blast stove to blast furnace blast according to claim 1, is characterized in that this method is the CO utilized in exhaust gas of hot-blast stove
2, so other contain CO
2Waste gas (without combustibles), or purification CO
2Gas all can be sneaked in blast furnace blast, sprays into blast furnace tuyere area.
3. according to claim 1,2 described iron smelting methods of sneaking into exhaust gas of hot-blast stove to blast furnace blast, it is characterized in that this method can not only be for blast furnace ironmaking, can also be for producer gas generator gas making.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101698168A CN103421914A (en) | 2012-05-20 | 2012-05-20 | Iron making method introducing exhaust gas of hot-blast stove into blast furnace air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101698168A CN103421914A (en) | 2012-05-20 | 2012-05-20 | Iron making method introducing exhaust gas of hot-blast stove into blast furnace air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103421914A true CN103421914A (en) | 2013-12-04 |
Family
ID=49647305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101698168A Pending CN103421914A (en) | 2012-05-20 | 2012-05-20 | Iron making method introducing exhaust gas of hot-blast stove into blast furnace air |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103421914A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112063783A (en) * | 2020-09-09 | 2020-12-11 | 鞍钢股份有限公司 | Blast furnace comprehensive blasting method and system |
| CN113718077A (en) * | 2021-09-27 | 2021-11-30 | 郑州豫兴热风炉科技有限公司 | Flue gas recycling system capable of realizing micro-emission of hot blast stove |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59107009A (en) * | 1982-12-11 | 1984-06-21 | Nisshin Steel Co Ltd | Method for operating blast furnace at high productivity coefficient in all-coke operation |
| CN101000141A (en) * | 2006-12-28 | 2007-07-18 | 鞍钢股份有限公司 | Blast furnace coal injection method using flue gas of hot blast stove as carrier |
| CN101871026A (en) * | 2010-06-12 | 2010-10-27 | 郑州豫兴耐火材料有限公司 | Method for injecting carbon dioxide into blast furnace |
-
2012
- 2012-05-20 CN CN2012101698168A patent/CN103421914A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59107009A (en) * | 1982-12-11 | 1984-06-21 | Nisshin Steel Co Ltd | Method for operating blast furnace at high productivity coefficient in all-coke operation |
| CN101000141A (en) * | 2006-12-28 | 2007-07-18 | 鞍钢股份有限公司 | Blast furnace coal injection method using flue gas of hot blast stove as carrier |
| CN101871026A (en) * | 2010-06-12 | 2010-10-27 | 郑州豫兴耐火材料有限公司 | Method for injecting carbon dioxide into blast furnace |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112063783A (en) * | 2020-09-09 | 2020-12-11 | 鞍钢股份有限公司 | Blast furnace comprehensive blasting method and system |
| CN113718077A (en) * | 2021-09-27 | 2021-11-30 | 郑州豫兴热风炉科技有限公司 | Flue gas recycling system capable of realizing micro-emission of hot blast stove |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104131122B (en) | A kind of iron-smelting process based on winding-up coal gas of high temperature | |
| CN103834755A (en) | Pulverized coal preheating technique of blast furnace coal injection system | |
| CN103122398A (en) | Smoke self-circulation preheating coal dust injection technology and device | |
| CN114395648A (en) | Iron-making method of hydrogen-carbon-rich circulating blast furnace | |
| CN203373366U (en) | Hot-blast stove system for achieving high blast temperature by only burning blast furnace | |
| CN203360479U (en) | Device for reducing burning temperature of pure-oxygen tuyere in smelting reduction ironmaking technology | |
| CN107090530A (en) | The method of heating furnace hot-blast stove | |
| CN203112858U (en) | Bleeding oxygen reutilization device in metallurgical production | |
| CN101871026A (en) | Method for injecting carbon dioxide into blast furnace | |
| CN103421914A (en) | Iron making method introducing exhaust gas of hot-blast stove into blast furnace air | |
| CN211367681U (en) | Novel rotary kiln system and pellet upgrading low-oxygen low-NOx production system | |
| CN102994677A (en) | System and method for power generation utilizing waste heat of tail waste gas of blast-furnace hot blast stove | |
| CN102620569A (en) | Resource cyclic utilization system of industrial kiln | |
| CN1053701C (en) | Technology for double preheating by using blast-furnace hot-blast stove gas, and combustion-supporting air | |
| CN202912990U (en) | Hot blast stove system | |
| CN211373194U (en) | Novel rotary kiln system and oxy-fuel combustion pellet production system | |
| CN201599815U (en) | Flue gas circulation heat exchange device of coal injection system | |
| CN103392012A (en) | Method for heating a blast furnace stove | |
| CN202501450U (en) | Self-circulation pulverized coal furnace device | |
| CN202993174U (en) | Fire coal gas combination type high-efficiency low discharge grate firing device | |
| CN202730150U (en) | Power generation system utilizing waste heat of waste gas at tail of blast furnace hot blast stove | |
| KR20100082696A (en) | Process for making iron in a blast furnace and use of top gas resulting from said process | |
| CN102588953B (en) | Self-circulation type pulverized coal furnace device | |
| CN215103367U (en) | Gas CO of smelting reduction furnace2Carbon neutralization device | |
| CN101503759A (en) | Sintering ignition technique utilizing residual heat |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131204 |