CN1146491A - Thermal-insulating method for melten iron in hot-metal mixer and apparatus - Google Patents
Thermal-insulating method for melten iron in hot-metal mixer and apparatus Download PDFInfo
- Publication number
- CN1146491A CN1146491A CN 95108894 CN95108894A CN1146491A CN 1146491 A CN1146491 A CN 1146491A CN 95108894 CN95108894 CN 95108894 CN 95108894 A CN95108894 A CN 95108894A CN 1146491 A CN1146491 A CN 1146491A
- Authority
- CN
- China
- Prior art keywords
- valve
- oxygen
- burner
- air
- pressure tester
- 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.)
- Granted
Links
Images
Landscapes
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The heat-insulation method uses blast furnace gas as fuel, oxygen-enriched air as combustion adjuvant, adopts automatic detection and control process and selects an optimum mixture ratio of blast furnace gas, air and oxygen gas to feed them into burner nozzle and inject them into mixer furnace to make combustion. Its equipment includes three pipelines of blast furnace gas, air and oxygen gas which are respectively equipped with pressure-measuring device, Throttle device, electric regulating valve, electric isolating valve and metal flexible tube. The oxygen-enriched air is formed in the front of said electric isolating valve, and the oxygen-enriched air and blast furnace gas are respectively fed into same burner nozzle and injected into the mixer furnace.
Description
The present invention relates to a kind of method and apparatus of melten iron in hot-metal mixer insulation, mainly supply the usefulness of Steel Plant's hot-metal insulating.
Hot metal mixer is the middle-chain between iron-smelting blast furnace and steel melting furnace, and its effect is to store molten iron, in order to even molten iron composition and temperature, and the molten iron supply and demand between adjusting and balanced blast furnace and steel melting furnace.
The hot-metal insulating method of existing hot metal mixer is that coke-oven gas, Sweet natural gas or the heavy oil with high heating value acts as a fuel.Its weak point is: with coke-oven gas or Sweet natural gas, and its flame temperature height, wayward, lining life is short, wastes energy, and easily leaks and jeopardizes personnel safety; Use heavy oil, its facility investment is big, and floor space is many, complex process, production cost height, contaminate environment.
The objective of the invention is to overcome above-mentioned weak point of the prior art and provide a kind of employing blast furnace byproduct (blast furnace gas) to act as a fuel, use melten iron in hot-metal mixer heat preserving method and the device of the mixed gas (oxygen-rich air) of air and oxygen as ignition dope.
Purpose of the present invention can reach by following measure:
Method of the present invention is: make fuel with blast furnace byproduct (blast furnace gas), mixed gas (oxygen-rich air) with air and oxygen is made ignition dope, by automatic detection and control, enter burner and spray in the hot metal mixer with the optimum mixture ratio of blast furnace gas, air and oxygen and burn, so that molten iron is incubated.
Device of the present invention is: on the blast furnace gas pipeline, pressure tester, stopping valve, throttling set, motor-driven control valve, pressure tester, electronic trip valve and metallic hose are housed successively, stopping valve and burner are arranged on the arm behind the metallic hose.On the air line, manual modulation valve and throttling set, motor-driven control valve and pressure tester that pressure tester, parallel connection are arranged successively, on the oxygen channel, pressure tester, stopping valve, reducing valve, pressure tester, throttling set, motor-driven control valve and pressure tester are housed successively, after this, oxygen channel and air line merge, and electronic trip valve and metallic hose are housed after the merging successively, on every arm behind the metallic hose stopping valve and burner are arranged.
The drawing of accompanying drawing is described as follows:
Fig. 1 is a general system diagram of the present invention;
Fig. 2 is a burner wiring layout of the present invention.
Piece number is represented among Fig. 1: 1 pressure tester, 2 stopping valve 3 throttling sets, 4 motor-driven control valves (butterfly valve), 5 electronic trip valve 6 metallic hoses 7 burners 8 reducing valve 9 oxygen, 10 air (blower fan) 11 blast furnace gases 12 hot metal mixer 13 manual modulation valves
The invention will be further described below in conjunction with embodiment and accompanying drawing: referring to Fig. 1
Method of the present invention is: make fuel with blast furnace gas 11, mixed gas with air 10 and oxygen 9 is made ignition dope, automatically detect earlier amount of oxygen and air capacity, regulate the ratio of oxygen and air then in the oxygen enrichment percentage of setting, at last detect the blast furnace gas amount automatically and regulate it and the ratio of oxygen-rich air, enter burner and spray in the hot metal mixer with three's mixed gas of this optimum proportion and burn, so that molten iron is incubated.
Device of the present invention is: on the pipeline behind the blast furnace gas 11, pressure tester 1, stopping valve 2, throttling set 3, motor-driven control valve 4, pressure tester 1, electronic trip valve 5 and metallic hose 6 are housed successively, followingly chew 7 quantity according to burning and be divided into corresponding arm, present embodiment is three burners and three arms, and every arm is provided with stopping valve 2.On the pipeline behind the air 10, manual modulation valve 13 and throttling set 3, motor-driven control valve 4 and the pressure tester 1 of pressure tester 1, parallel connection is housed successively.On the pipeline behind the oxygen 9, pressure tester 1, stopping valve 2, reducing valve 8, pressure tester 1, throttling set 3, motor-driven control valve 4 and pressure tester 1 are housed successively.After this, oxygen channel and air line are merged into the oxygen-rich air pipeline, and electronic trip valve 5 and metallic hose 6 are housed after the merging successively, below according to burning chew the number be divided into corresponding arm, present embodiment is three burners and three arms, every arm is provided with stopping valve.Oxygen-rich mixture body on blast furnace gas behind the stopping valve and the corresponding arm enters same burner respectively, sprays in the hot metal mixer 12 from the burner mouth and burns, so that molten iron in the hot metal mixer is incubated.
Record the flow of blast furnace gas, air and oxygen through throttling set, carry out tandem respectively according to the oxygen enrichment percentage of setting and regulate, realize automatic ratio control.Serial connection D type mechanical arm starts device of the present invention down in order to manual state in control loop.
Limit switch is installed, in order to the scram variable valve on variable valve.
Throttling set adopts standard ring casing orifice plate, and main instrument is selected 1151 serial capacitance transducers and I series electronic control instruments for use.
When on the blast furnace gas pipeline during from hypotony that former and later two pressure tester 1 record, when perhaps the air flow quantity that promptly records from throttling set 3 of the hypotony that a back pressure tester 1 records on the air line is too small, the sound and light alarm signal is sent in the capital, and close electronic trip valve 5 on coal gas and the oxygen-rich air pipeline and the motor-driven control valve 4 on the gas line, the motor-driven control valve 4 on the time-delay closing air line and electronic trip valve 5 and blower fan immediately automatically.When on the oxygen channel during from hypotony that previous pressure tester 1 records, send the sound and light alarm signal, and close electronic trip valve 5 automatically, open manual modulation valve 13 simultaneously, to regulate the ratio of air and oxygen, make it to meet the ratio of setting, to realize the semi-automatic in proportion adjusting of pure blast furnace gas and oxygen-rich air.
For preventing mishandle, guaranteeing under running status of the present invention can not the manual-lock air cutoff valve and close blower fan, but the manual-lock gas stop valve, interlocking close air cutoff valve and coal gas, air, oxygen regulating valve and blower fan.
Referring to Fig. 2, burning chew by burning chew body 14, spout 20, burn chew mouthfuls 19, gasket 16 and bolt fasteners 17 form, it is three-way body that burning is chewed body, oxygen and air gas mixture admission port 15 are arranged at the top, spout is loaded on to burn and chews in the body left and right sides port, spout small end 18 is exposed to burn and chews outside the port of body left side, burn chew tight-lipped be fixed in to burn chew the body left side, burn chew mouthful and the spout small end between the space is arranged.
Present embodiment is 300 tons of hot metal mixer, and the blast furnace gas flow is 1800-2100m
3/ h, pressure are 6-8KPa; Oxygen flow is 170-200m
3/ h, pressure are 0.8-1.6MPa.
The present invention contrasts prior art and has following advantage:
1, with the fuel of low-calorie blast furnace gas as high temperature furnace (mixed iron blast), can Gather materials on the spot, turn waste into wealth, energy savings, free from environmental pollution;
2, combustion adjuvant oxygen-enriched air, flow of oxygen is few, and general steel mill all has oxygen supply Device can be gathered materials on the spot;
3, than high heating value gas burning system, with increasing special equipment, compare high heating value hardly Fuel system, equipment investment is few, and occupied ground is few;
4, technology is simple, and is easy to operate, safe and reliable, is easy to realize semi-automation and automatization;
5, can reduce the production cost of Steel Plant.
Claims (3)
1, the method for a kind of melten iron in hot-metal mixer insulation is characterized in that, makes fuel with blast furnace gas, makes ignition dope with the rich gas air, by automatic detection and control, enters burning with the optimum mixture ratio of blast furnace gas, air and oxygen and chews and spray in the hot metal mixer and burn.
2, a kind of device of melten iron in hot-metal mixer insulation is characterized in that,
1. on the blast furnace gas pipeline, pressure tester, stopping valve, throttling set, motor-driven control valve, pressure tester, electronic trip valve and metallic hose are housed successively, stopping valve and burner are arranged on the arm behind the metallic hose;
2. on the air line, manual modulation valve and throttling set, motor-driven control valve and pressure tester that pressure tester, parallel connection are arranged successively, on the oxygen channel, pressure tester, stopping valve, reducing valve, pressure tester, throttling set, motor-driven control valve and pressure tester are housed successively, after this, oxygen channel and air line merge, and electronic trip valve and metallic hose are housed after the merging successively, on every arm behind the metallic hose stopping valve and burner are arranged.
3, the device of melten iron in hot-metal mixer insulation according to claim 2, it is characterized in that, burner is made up of burner body, spout, burner mouth, gasket and bolt fasteners, the burner body is a three-way body, oxygen and air gas mixture inlet are arranged at the top, spout is packed in the burner body, and there is the space in the tight-lipped burner body left side that is fixed in of burner between burner mouth and the spout small end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95108894A CN1041640C (en) | 1995-09-25 | 1995-09-25 | Thermal-insulating method for melten iron in hot-metal mixer and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95108894A CN1041640C (en) | 1995-09-25 | 1995-09-25 | Thermal-insulating method for melten iron in hot-metal mixer and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1146491A true CN1146491A (en) | 1997-04-02 |
| CN1041640C CN1041640C (en) | 1999-01-13 |
Family
ID=5076980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95108894A Expired - Fee Related CN1041640C (en) | 1995-09-25 | 1995-09-25 | Thermal-insulating method for melten iron in hot-metal mixer and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1041640C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560076A (en) * | 2010-12-17 | 2012-07-11 | 鞍钢股份有限公司 | Method for solving heating by one furnace shared by grain-oriented silicon steel and other steel with enriched oxygen |
| CN102681558A (en) * | 2011-03-10 | 2012-09-19 | 中国恩菲工程技术有限公司 | Control system for oxygen supply in smelting system |
-
1995
- 1995-09-25 CN CN95108894A patent/CN1041640C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560076A (en) * | 2010-12-17 | 2012-07-11 | 鞍钢股份有限公司 | Method for solving heating by one furnace shared by grain-oriented silicon steel and other steel with enriched oxygen |
| CN102560076B (en) * | 2010-12-17 | 2013-05-29 | 鞍钢股份有限公司 | Method for solving heating by one furnace shared by grain-oriented silicon steel and other steel with enriched oxygen |
| CN102681558A (en) * | 2011-03-10 | 2012-09-19 | 中国恩菲工程技术有限公司 | Control system for oxygen supply in smelting system |
| CN102681558B (en) * | 2011-03-10 | 2015-11-25 | 中国恩菲工程技术有限公司 | The control system of oxygen supply in smelting system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1041640C (en) | 1999-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2853234Y (en) | Automatic baking device of steel ladle | |
| CN104534508A (en) | Safe marsh gas combustion control device and method | |
| CN103451342A (en) | Device and method for increasing temperature of hot air in blast furnace | |
| CN202330328U (en) | Combustion control system for building element fire-resistance test furnace | |
| CN1041640C (en) | Thermal-insulating method for melten iron in hot-metal mixer and apparatus | |
| CN204345708U (en) | A kind of biogas safe combustion control device | |
| CN203298342U (en) | Combustion control system of heat treatment furnace | |
| CN209655295U (en) | A kind of double gas combustion apparatus | |
| CN203672119U (en) | Automatically-controlled oxygen-enriched combustion system for nonferrous metallurgy converter | |
| CN218404302U (en) | Oxygen-enriched combustion valve set system of blast furnace hot blast stove | |
| US3210181A (en) | Gaseous fuel control process for furnaces | |
| CN215259928U (en) | Natural gas system acetylene device preheater combustion control system | |
| CN112611110B (en) | Full-automatic high-safety low-nitrogen hot air heating combustion system and operation method thereof | |
| CN213334372U (en) | Combustion heating system for mixing natural gas and air | |
| CN213631608U (en) | Float glass kiln combustion-supporting air device and float glass kiln | |
| CN2275676Y (en) | Dual-purpose combustion supporting burner of heating bell of bell type annealing furnace for cold-rolling plate | |
| CN113790607A (en) | Oxygen-enriched combustion system for steel rolling heating furnace and heat treatment furnace and control method | |
| CN208253645U (en) | Biomass couples pulverized coal combustion system | |
| CN103162527A (en) | Vertical melting furnace premix type combustion system | |
| US3346249A (en) | Gaseous fuel control system and apparatus for furnaces | |
| CN109708110A (en) | A kind of double gas combustion apparatus | |
| CN212371169U (en) | Novel energy-saving vertical roaster for steel ladle | |
| CN2848266Y (en) | Carbon dioxide inertial device | |
| CN217635626U (en) | Natural gas and coal gas integrated supply system for crude lead alloy refining kettle | |
| CN220867461U (en) | Low-gas-consumption gas baking system of iron-mixing furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |