CN102827971A - Blast furnace combined injection process of coke oven gas and coal dust - Google Patents
Blast furnace combined injection process of coke oven gas and coal dust Download PDFInfo
- Publication number
- CN102827971A CN102827971A CN201110160190XA CN201110160190A CN102827971A CN 102827971 A CN102827971 A CN 102827971A CN 201110160190X A CN201110160190X A CN 201110160190XA CN 201110160190 A CN201110160190 A CN 201110160190A CN 102827971 A CN102827971 A CN 102827971A
- Authority
- CN
- China
- Prior art keywords
- coal
- oven gas
- gas
- coke
- coke oven
- 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
- Manufacture Of Iron (AREA)
Abstract
The invention discloses a blast furnace combined injection process of coke oven gas and coal dust, comprising the following steps of: leading out coke oven gas from a main gas duct (1), letting the coke oven gas pass through a detarring apparatus (2) at an inlet and enter a coke oven gas pressure machine (3) for pressurization, and allowing the coke oven gas to enter a blast furnace air port coal lance through a buffer tank (4), a gas main (11) and a gas bustle pipe (5). The invention is characterized in that the coal lance is a double-layer telescopic coal lance (6); and the coke oven gas enters an outer pipe of the double-layer telescopic coal lance (6), and simultaneously pulverized coal passes through an arranged coal dust distributor (8) and enters an inner pipe of the double-layer telescopic coal lance (6). According to the invention, the process of combined injection of the coke oven gas and coal dust at the same air port is realized. Without influencing a present blast furnace coal injection system, the coke oven gas is injected into the blast furnace so as to replacing coke with gas and minimize coke ratio.
Description
Technical field
The invention belongs to the blast furnace blowing technical field, particularly a kind of process method of blast furnace blowing coke-oven gas.
Background technology
The blast furnace ironmaking flow process is the production process that is the basis with the carbon back energy, and its energy consumption accounts for more than 70% of Iron and Steel Production total energy consumption.The present blase furnace cast iron output of China has accounted for 60% of Gross World Product.Its CO
2Total emission volumn is about 9.6 hundred million tons, accounts for China's industry total release about 15%.Therefore, the development of China's blast furnace ironmaking is faced with severe energy-conservation and CO
2Reduce discharging pressure.
China is world steel big producing country, also is coke production big country, annual about 1,500 hundred million m of coke-oven gas output
3Carry out various heating as fuel or burning produces the steam-electric power except that major part, have 20% to be burnt simply or diffuse approximately.
Contain a large amount of H in the coke-oven gas
2(50%-60%) and portion C H
4In hydrocarbon polymer, spray into blast furnace after, hydrocarbon polymer is cracking at high temperature, can make H in the cupola well coal gas
2Content further improves.Because H
2Viscosity low, density is little; Thermal conductivity good (capacity of heat transmission is bigger 7～10 times than other gas) therefore can make coal gas density and viscosity all reduce, thereby reduces pressure reduction; And the heat exchange between ability accelerating gas and solid helps improving the heat energy utilization rate of coal gas in blast furnace.The more important thing is H
2Be a kind of reductive agent efficiently, H
2Velocity of diffusion be 3.74 times of CO, its reduzate H
2The velocity of diffusion of O is CO
21.562 times, so H
2Can reach reaction interface through the trickle hole of ore quickly than CO, the H that the reduction back generates
2O is also than CO
2Spread soon.H
2Not only itself has reductive action, and reduction also has katalysis to CO, therefore can significantly promote the development of blast furnace indirect reduction, reduces coke ratio, improves pig iron output and quality, for reducing CO
2Discharging has the most directly meaning.
Patent ZL200920150950.7 has proposed a kind of blast furnace blowing coke-oven gas system; Can realize coke-oven gas in the independent winding-up on the blast-furnace tuyere or between adjacent coke-oven gas injection tuyere, be provided with breeze blowing air port and coal dust mixed injection uniformly at intervals, a kind of material but can only jet in each air port.This can cause the idle and waste of capacity of equipment for the blast furnace that has coal injection system, and coal powder injection is than reducing, and essence is for coal with gas.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art; Technical problem to be solved by this invention provides a kind of coke-oven gas and the coal dust process method at same tuyere composite blowing; Under the condition that does not influence existing bf coal injection system; Coke-oven gas is sprayed into blast furnace, and realization for Jiao, reduces ratio of putting coke into furnace with gas to greatest extent.
Technical scheme of the present invention is achieved in that
The process method of a kind of blast furnace composite blowing coke-oven gas and coal dust; The coke-oven gas of drawing from gas main; Get into the pressurization of coke-oven gas press through inlet detar device, enter into blast-furnace tuyere coal rifle through surge tank, the coal gas person in charge and coal gas bustle pipe again, it is characterized in that the coal rifle is a double braid covering cartridge type coal rifle; Coke-oven gas enters into double braid covering cartridge type coal rifle outer tube, and coal injection enters in the double braid covering cartridge type coal rifle through the pulverized coal distributor that is provided with and manages simultaneously.
Coal gas is responsible for and is provided with high pressure nitrogen and pressurized air contact in the coke-oven gas injection system of the present invention, in case the coke-oven gas system goes wrong, switches to high-pressure air again after can switching to high pressure nitrogen or switching to high pressure nitrogen.
Be provided with corresponding valve and check point along journey in the coke-oven gas injection system of the present invention, be used for controling and safety control of system.
Compared with prior art, the present invention has following obviously advantage: 1, the present invention adopts same air port gas, coal to mix spray, does not influence pulverized coal injection, can realize with gas for Jiao.2, the present invention adopts gas, the shared double braid covering cartridge type coal rifle of coal, and coke-oven gas can play the effect of cooling coal rifle, can prolong the work-ing life of coal rifle, can better reductive agent be provided for blast furnace again.3, coke-oven gas injection system of the present invention switches to high-pressure air after can switching to high pressure nitrogen or switching to high pressure nitrogen again, and can realize stops the supple of gas or steam does not draw guns, operation safe, simple.
Description of drawings
Fig. 1 is a blast furnace blowing coke-oven gas system schematic of the present invention;
Fig. 2 is that double braid covering cartridge type coke-oven gas and coal dust mix coal spouting gun;
Wherein, 1 gas main; 2 detar devices; 3 coke-oven gas press; 4 surge tanks; 5 coal gas bustle pipes; 6 double braid covering cartridge type coal rifles; 7 blast furnaces; 8 pulverized coal distributors; 9 high pressure nitrogen house stewards; 10 pneumatic manifolds; 11 coal gas are responsible for; Pipe in the 6-1 coal rifle; 6-2 coal rifle outer tube.
Embodiment
Below with a 4000m
3Blast furnace is an example, in conjunction with accompanying drawing the present invention is further specified.
As depicted in figs. 1 and 2, coke-oven gas is drawn from gas main 1, after detar device 2 purifying treatment, gets into coke-oven gas press 3, is pressurized to 0.8MPa, and flow is 10000Nm
3/ h; Get into surge tank 4 through the outlet reverse checkvalve; Be responsible for 11 through coal gas again and arrive coal gas bustle pipe 5; Draw branch gas tube and be connected to the outer tube 6-2 of the double braid covering cartridge type coal rifle 6 of 36 blast-furnace tuyeres with rubber hose from coal gas bustle pipe 5, the interior pipe 6-1 of double braid covering cartridge type coal rifle 6 links to each other with the pulverized coal distributor 8 of setting through pipeline, and the coal dust of the coke-oven gas of outer tube 6-2 and interior pipe 6-1 together sprays into blast furnace 7.The interior pipe 6-1 of double braid covering cartridge type coal rifle 6 is of a size of Ф 28 * 3 (mm), and outer tube 6-2 is of a size of Ф 42 * 3 (mm).
Coal gas is responsible for and is connected with 0.8MPa pneumatic manifold 10 with 0.8MPa high pressure nitrogen house steward 9 respectively, in case the coke-oven gas system goes wrong, switches to pressurized air again after can switching to high pressure nitrogen or switching to high pressure nitrogen.
Be provided with corresponding valve and check point along journey in the coke-oven gas injection system, be used for controling and safety control of system.
Result of implementation of the present invention shows, keeps under the constant situation of 170kg/t at the pulverized coal injection into blast furna ratio, and 25m again can jet
3The coke-oven gas of/t, the substitution rate of coke-oven gas STRENGTH ON COKE is calculated by 0.6, then can reduce the about 15kg/t of ratio of putting coke into furnace, reduces the about 18ke/t of CO2 discharging, energy-conservation and environment protecting highly significant.
Claims (2)
1. the process method of blast furnace composite blowing coke-oven gas and coal dust; The coke-oven gas of drawing from gas main (1); Get into coke-oven gas press (3) pressurization through inlet detar device (2); Enter into blast-furnace tuyere coal rifle through surge tank (4), the coal gas person in charge (11) and coal gas bustle pipe (5) again; It is characterized in that the coal rifle is a double braid covering cartridge type coal rifle (6), coke-oven gas enters into double braid covering cartridge type coal rifle (6) outer tube, and coal injection enters into pipe in the double braid covering cartridge type coal rifle (6) through the pulverized coal distributor (8) that is provided with simultaneously.
2. according to the process method of claim 1 said blast furnace composite blowing coke-oven gas and coal dust, it is characterized in that: described coal gas is responsible for (11) and is provided with high pressure nitrogen and pressurized air contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110160190XA CN102827971A (en) | 2011-06-14 | 2011-06-14 | Blast furnace combined injection process of coke oven gas and coal dust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110160190XA CN102827971A (en) | 2011-06-14 | 2011-06-14 | Blast furnace combined injection process of coke oven gas and coal dust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102827971A true CN102827971A (en) | 2012-12-19 |
Family
ID=47331278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110160190XA Pending CN102827971A (en) | 2011-06-14 | 2011-06-14 | Blast furnace combined injection process of coke oven gas and coal dust |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102827971A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110241272A (en) * | 2018-03-07 | 2019-09-17 | 上海梅山钢铁股份有限公司 | A method of the composite low-carbon ironmaking based on blast furnace blowing coke oven gas |
| CN110484665A (en) * | 2019-06-04 | 2019-11-22 | 酒泉钢铁(集团)有限责任公司 | A kind of compensation method for thermal in gas injection smelting process |
| CN113151621A (en) * | 2021-03-31 | 2021-07-23 | 中冶南方工程技术有限公司 | Blast furnace hydrogen-rich coal injection combined process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201437540U (en) * | 2009-05-12 | 2010-04-14 | 中冶东方工程技术有限公司 | Blast furnace blowing coke oven gas system |
| CN201785417U (en) * | 2010-06-24 | 2011-04-06 | 河北钢铁股份有限公司承德分公司 | Spray gun of blast furnace capable of spraying medium |
-
2011
- 2011-06-14 CN CN201110160190XA patent/CN102827971A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201437540U (en) * | 2009-05-12 | 2010-04-14 | 中冶东方工程技术有限公司 | Blast furnace blowing coke oven gas system |
| CN201785417U (en) * | 2010-06-24 | 2011-04-06 | 河北钢铁股份有限公司承德分公司 | Spray gun of blast furnace capable of spraying medium |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110241272A (en) * | 2018-03-07 | 2019-09-17 | 上海梅山钢铁股份有限公司 | A method of the composite low-carbon ironmaking based on blast furnace blowing coke oven gas |
| CN110484665A (en) * | 2019-06-04 | 2019-11-22 | 酒泉钢铁(集团)有限责任公司 | A kind of compensation method for thermal in gas injection smelting process |
| CN113151621A (en) * | 2021-03-31 | 2021-07-23 | 中冶南方工程技术有限公司 | Blast furnace hydrogen-rich coal injection combined process |
| CN113151621B (en) * | 2021-03-31 | 2022-10-14 | 中冶南方工程技术有限公司 | Blast furnace hydrogen-rich coal injection combined process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100489393C (en) | Blast-furnace coal powder injection method using waste gas of hot-blast stove flue as carrier | |
| CN113832270A (en) | Blast furnace iron-making method adopting multi-medium injection | |
| CN102605119B (en) | Coal dust conveying during a kind of pulverized coal injection in blast furnace and pre-heating technique device | |
| CN103122398B (en) | Smoke self-circulation preheating coal dust injection technology and device | |
| CN113151621B (en) | Blast furnace hydrogen-rich coal injection combined process | |
| CN114438267A (en) | Iron-making system of hydrogen-carbon-rich circulating blast furnace | |
| CN201437540U (en) | Blast furnace blowing coke oven gas system | |
| CN113549717A (en) | Blast furnace gas injection system for Europe and metallurgy | |
| CN105036134B (en) | Furnace of calcium carbide and the method for preparing calcium carbide | |
| CN217103952U (en) | Ou ye stove jetting composite tuyere device | |
| CN114752718B (en) | Ultra-low carbon consumption blast furnace smelting process and blast furnace smelting system | |
| CN102827971A (en) | Blast furnace combined injection process of coke oven gas and coal dust | |
| WO2023134368A1 (en) | Ultrahigh oxygen-enriched low-carbon smelting method | |
| CN102419099B (en) | Method and device for conveying coal dust by utilizing flue gas | |
| CN207313541U (en) | Ou Ye stove coal gas devices | |
| CN103014205A (en) | Method for supplying oxygen to blast furnace oxygen-enriched coal spray | |
| CN102010918A (en) | Environmental-friendly energy-saving blast-furnace oxygen ironmaking method | |
| CN205151782U (en) | Calcium carbide furnace | |
| CN215481018U (en) | Blast furnace hydrogen-rich coal injection combination device and system | |
| CN102643937A (en) | Blast furnace spraying blowing process | |
| CN215799659U (en) | Blast furnace gas injection system for Europe and metallurgy | |
| CN216155899U (en) | Blast furnace ironmaking system with multi-medium injection | |
| CN216786172U (en) | Composite fuel spray gun for iron making | |
| CN108588408B (en) | Device and process for producing metallized pellets by using iron oxide red tunnel kiln | |
| CN102936633A (en) | Blast furnace coal injection method adopting coke oven coal gas as coal injection conveying carrier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121219 |