CN108396100B - A kind of horizontal continuity charging steel scrap preheating device of electric arc furnace and application method - Google Patents
A kind of horizontal continuity charging steel scrap preheating device of electric arc furnace and application method Download PDFInfo
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- CN108396100B CN108396100B CN201810226021.3A CN201810226021A CN108396100B CN 108396100 B CN108396100 B CN 108396100B CN 201810226021 A CN201810226021 A CN 201810226021A CN 108396100 B CN108396100 B CN 108396100B
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- gas
- conveyor roller
- preheating
- electric arc
- preheating section
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/527—Charging of the electric furnace
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The present invention relates to a kind of horizontal continuity charging steel scrap preheating device of electric arc furnace, it includes preheating section ontology, conveyor roller, igniter, gas transmission equipmen and exhaust outlet, conveyor roller is set to the lower section of preheating section ontology, a cavity is formed with bottom in preheating section ontology, gas transmission equipmen is set in the cavity, gas transmission equipmen provides combustion-supporting gas for preheating section ontology, conveyor roller is equipped with venthole, igniter is set to the top of conveyor roller, the both ends of preheating section ontology are respectively equipped with smoke inlet and feed inlet, exhaust outlet is set to the top of preheating section ontology, is arranged close to feed inlet.When in use, the heat of coal combustion largely improves the temperature of steel scrap to preheating device of the present invention, and the effect of preheating is good, accelerates the rhythm of production of electric arc furnaces, reduces production cost；Simultaneously because in device coal combustion heat, avoid utilizing merely smoke pre-heating steel scrap that flue-gas temperature is caused to generate pernicious gas dioxin when dropping to 300 DEG C -400 DEG C, preserve the ecological environment.
Description
Technical field
The present invention relates to a kind of horizontal continuity charging steel scrap preheating device of electric arc furnace and application methods.
Background technique
Currently there is Imbalance in weight, inadequate resource, energy consumption by fast development in recent years in China's steel industry
High, the problems such as discharge amount is big.Recycling scrap resources can solve these difficulties faced.It is counted by related data, often
Use 1 ton of steel scrap to substitute as raw material, 1.7 tons of iron ore concentrates can be saved, primary ore that can be 4.25 tons of exploitation reducig.Steel scrap is used as and follows
Ring regenerated resources, common cycle period are 8 to 30 years, can be used with Infinite Cyclic.The steel of equivalent is refined by using scrap ratio
Iron ore energy conservation 60%, water-saving 40%.Discharge exhaust gas 86%, waste water 76%, waste residue 97% can be also reduced with steel scrap steel-making.Especially
In arc furnace smelting procedure, steel scrap is important regenerated resources, and comparison molten iron has low-cost advantage, so in electric arc furnaces
The additional amount of steel scrap should be increased in smelting as far as possible.With the development of horizontal continuity charging electric arc furnaces, the charge weight of steel scrap is also big
It is big to increase, be conducive to economize on resources, promote resources sustainable development.
With the progress of horizontal continuity charging electric arc furnace smelting technique, a large amount of steel scraps are added in smelting process, due to initial
Steel scrap temperature is very low, if be added directly into electric arc furnaces, causes in furnace early period to be mainly temperature-rise period, leads to the smelting of electric arc furnaces
The refining time greatly prolongs, and increases production cost, is more common means, but smoke pre-heating steel scrap at present with smoke pre-heating steel scrap
Technology attainable pre-heat effect be limited to the temperature of flue gas.Theoretically scrap steel preheating temperature is every increases by 100 DEG C, can save electricity
It can 20kWh/t.If considering the effective rate of utilization of energy, in general, scrap steel preheating temperature is every to increase by 100 DEG C, can save electricity
Energy 15kWh/t or so.So scrap steel preheating effect well will be energy saving, power consumption is reduced, accordingly since steel scrap is in electric arc furnaces
The interior time further melted greatly shortens, and can shorten smelting cycle, improves productivity.Chinese patent
CN200910022142.7 discloses a kind of scrap steel preheating system for electric arc furnace, using the waste heat of high-temperature flue gas, realizes former to steel-making
The preheating of material has reached the recycling that utilizes of flue gas heat, but effect of its preheating is limited by flue gas self-temperature, it is difficult to reach
Higher temperature.Chinese patent CN201310056573.1 discloses a kind of electric arc furnaces continuous charging dress using smoke pre-heating
It sets, material is big in high-temperature flue gas contact area, and flue gas residence time is long, and material pre-heat effect greatly improves, but its flue gas is stagnant
It stays time length to will lead to being greatly reduced for flue-gas temperature, causes pernicious gas dioxin to generate, environment will be endangered by such as dealing with improperly
With human health.Patent CN201420602114.9 discloses a kind of scrap steel preheating electric arc furnaces flue gas recovery device, device benefit
The generation of dioxin is inhibited simultaneously with fume afterheat, but the generation of its dioxin in order to prevent, flue gas cannot stop for a long time
Steel scrap is preheated in preheating channel, causes fume afterheat utilization rate not high, scrap steel preheating effect is general.
Summary of the invention
(1) technical problems to be solved
In order to solve the above problem of the prior art, the present invention provides a kind of horizontal continuity charging electric arc furnaces scrap steel preheating dress
It sets and application method, it is temperature limited in flue-gas temperature and smoke pre-heating steel scrap for solving scrap steel preheating existing for existing technology
Flue-gas temperature reduction is caused to lead to the problem of pernicious gas.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include:
A kind of horizontal continuity feeds steel scrap preheating device of electric arc furnace comprising preheating section ontology, conveyor roller, igniter,
Gas transmission equipmen and exhaust outlet, the conveyor roller are set to the lower section of the preheating section ontology, the conveyor roller and the preheating
There are certain intervals to form a cavity between bottom in section ontology, the gas transmission equipmen is set in the cavity, and the gas transmission equipmen is
The preheating section ontology provides combustion-supporting gas, and the conveyor roller is equipped with venthole, and the igniter is set to the transport roller
The top in road, the both ends of the preheating section ontology are respectively equipped with smoke inlet and feed inlet, and the smoke inlet and feed inlet are set
It is arranged in the top of the conveyor roller and close to conveyor roller, the exhaust outlet is set to the top of the preheating section ontology, leans on
The nearly feed inlet setting.
Preheating device as described above, it is preferable that the gas transmission equipmen is arranged close to the smoke inlet.
Preheating device as described above, it is preferable that the gas transmission equipmen connection intake valve and air inlet pipe, the intake valve connect
The air inlet pipe is connect, the air inlet pipe provides combustion-supporting gas, and the gas transmission equipmen is equipped with multiple transfer ports.
Preheating device as described above, it is preferable that the transfer port is uniformly distributed setting.
Preheating device as described above, it is preferable that the exhaust outlet connects exhaust equipment, and the exhaust equipment includes pumping
Machine and exhaust pipe, the exhaust pipe connect the exhaust outlet, and the air exhauster connects exhaust pipe.
Preheating device as described above, it is preferable that the combustion-supporting gas is one of oxygen, air, natural gas, coal gas
Or it is several.
Preheating device as described above, it is preferable that the venthole be equipped with it is multiple, be uniformly distributed on institute's conveyor roller.
The present invention also provides the application methods of preheating device as described above comprising following steps:
S1, steel scrap, coal, lime and other raw materials are mixed as mixture, is added on conveyor roller, electric arc furnaces is high
Warm flue gas is inputted from inlet port；
S2, the mixture are conveyed by conveyor roller, utilize igniter fire；
S3, combustion-supporting equipment offer combustion-supporting gas is opened, coal burning releases the heat of heat and electric arc furnaces high-temperature flue gas, will
The mixture of high temperature is sent into electric arc furnaces by scrap heating, conveyor roller；
Gas after S4, at the same time, the intrinsic flue gas of preheating section and burning passes through exhaust outlet discharge.
(3) beneficial effect
The beneficial effects of the present invention are:
The present invention is transported in scrap preheater after being mixed using raw materials such as steel scrap and coals, is carried out a little using igniter
Combustion, the high-temperature flue gas that the heat and electric arc furnaces that coal combustion generates generate simultaneously heat steel scrap, improve steel scrap and enter furnace temperature
Degree.
Advantages of the present invention: when in use, the heat of coal combustion largely improves steel scrap to preheating device of the present invention
The effect of temperature, preheating is good, accelerates the rhythm of production of electric arc furnaces, reduces production cost；Simultaneously because coal combustion in device
Heat avoids utilizing smoke pre-heating steel scrap that flue-gas temperature is caused to generate the evil of pernicious gas two when dropping to 300 DEG C -400 DEG C merely
English is preserved the ecological environment.
Detailed description of the invention
Fig. 1 is the sectional view of a preferred preheating device in embodiment 1；
Fig. 2 is the structural schematic diagram of a preferred gas transmission equipmen；
Fig. 3 is the sectional view of a preferred preheating device in embodiment 2.
[description of symbols]
1: preheating section ontology；
2: conveyor roller；
3: igniter；
4: gas transmission equipmen；
5: venthole；
6: smoke inlet；
7: feed inlet；
8: exhaust outlet；
9: raw material；
10: intake valve；
11: air inlet pipe；
12: transfer port；
13: exhaust pipe；
14: air exhauster.
Specific embodiment
In order to preferably explain the present invention, in order to understand, with reference to the accompanying drawing, by specific embodiment, to this hair
It is bright to be described in detail.
Embodiment 1
A kind of horizontal continuity charging steel scrap preheating device of electric arc furnace, including preheating section ontology, gas transmission exhaust system, gas transmission row
Gas system includes gas transmission equipmen and exhaust outlet, as shown in Figure 1, being equipped with conveyor roller 2, igniter 3, gas transmission in preheating section ontology 1
Equipment 4 and exhaust outlet, conveyor roller 2 are set to the lower section of preheating section ontology 1, and conveyor roller 2 has bottom in preheating section ontology 1
Certain distance makes conveyor roller distance form a cavity with bottom in preheating section ontology, and conveyor roller is from right to left to electric arc
Transferring raw material in furnace.Gas transmission equipmen 4 is set in the cavity, and gas transmission equipmen 4 is mainly to mention above conveyor roller 2 in preheating section ontology
For combustion-supporting gas, conveyor roller 2 is equipped with venthole 5, and combustion-supporting gas is entered in preheating section ontology by venthole 5, igniter 3
Set on the top of conveyor roller 2, for lighting the carbon in the raw material transported on conveyor roller.The left and right ends of preheating section ontology 1
It is respectively equipped with smoke inlet 6 and feed inlet 7, smoke inlet 6 and feed inlet 7 are set to the top of conveyor roller 2 and close to transport rollers
Road 2 is arranged, and smoke inlet 6 is also as the outlet for conveyor roller transport raw material.In one end close to feed inlet 7, preheating section sheet
The top of body 1 is equipped with exhaust outlet 8, the gas that exhaust outlet 8 is used to flue gas be discharged and burning generates.Gas transmission equipmen is close to smoke inlet
6 settings, igniter are arranged also close to smoke inlet 6, and corresponding, the venthole 5 on conveyor roller 2 is set close to smoke inlet 6
It sets, the combustion-supporting gas for being conducive to the input of gas transmission equipmen 4 in this way enters in preheating section ontology 1.The raw materials such as steel scrap and coal 9 pass through pan feeding
Mouthfuls 7 enter on conveyor rollers 2 and are transported, and enter in preheating ontology 1, and the high-temperature flue gas that electric arc furnaces generates is from smoke inlet 6
Into being preheated to the raw materials such as steel scrap 9.When the raw materials such as steel scrap and coal 9 reach igniter 3 with conveyor roller 2, igniter 3
Coal light and generates heat to progress scrap heating, while the combustion-supporting gas in gas transmission equipmen 4 can pass through conveyor roller 2
Venthole 5 is contacted with coal, auxiliary combustion, keeps burning more abundant, and the heat of coal combustion substantially increases the temperature of steel scrap, is realized
Steel scrap is preheated, pre-heat effect is more preferable, while the temperature of high-temperature flue gas will not be made quickly to reduce, and avoids the production of dioxin
It is raw, the rhythm of production of electric arc furnaces is accelerated, production cost is reduced.
Specifically, as shown in Fig. 2, gas transmission equipmen 4 is connected with intake valve 10, intake valve 10 connects air inlet pipe 11, gas transmission is set
Standby 4 are equipped with transfer port 12, and intake valve 10 is mounted on the middle part of gas transmission equipmen 4, and the upper end of gas transmission equipmen 4 is uniformly distributed multiple gas transmissions
Hole 12.
Air inlet pipe 11 is the device that gas transmission equipmen 4 is imported for combustion-supporting gas, and intake valve 9 is used to control opening for gas entrance
Pass and flow.Gas provided by gas transmission equipmen 4 is combustion-supporting gas, and combustion-supporting gas is oxygen, in air, natural gas, coal gas
It is one or more of.
The effect of tiny venthole 5 above conveyor roller 4 is the combustion-supporting gas and raw material for enabling following input
It comes into full contact with.In order to react fully, multiple ventholes 5 are equipped with, venthole 5 is uniformly distributed.In order to which the coal in raw material sufficiently fires
It burns, igniter 3 also is provided with multiple.The mixed raw material advanced from right to left is lighted, and heats steel scrap sufficiently.
Embodiment 2
The present embodiment be on that basis of example 1, in order to quickly by flue gas and burning generate gas effectively exclude, In
Device for transferring is installed, as shown in figure 3, exhaust equipment includes air exhauster 14 and exhaust pipe 13, exhaust pipe 13 on exhaust outlet
Exhaust outlet 8 is connected, air exhauster 14 connects exhaust pipe 13, and exhaust pipe can be set to the outside of the preheating section ontology, pass through pumping
The gas that flue gas and burning generate can quickly be discharged, not influence the preheating of the raw materials such as steel scrap by mechanism of qi.
The application method of above-mentioned horizontal continuity charging steel scrap preheating device of electric arc furnace, includes the following steps:
Steel scrap, coal, lime and other raw materials are mixed into mixture by step 1, are added to horizontal continuity charging electric arc
On the conveyor roller 2 of furnace, electric arc furnaces high-temperature flue gas is inputted from inlet port 6；
Step 2, mixture are conveyed by conveyor roller 2, are lighted a fire using the igniter 3 being arranged in preheating main body 1；
Step 3 opens combustion-supporting equipment 4 and provides combustion-supporting gas, makes oxygen-enriched in preheating section ontology 1, passes through coal combustion and releases heat
The heat of amount and electric arc furnaces high-temperature flue gas carries out heat exchange with steel scrap, by scrap heating, finally by conveyor roller 2 by high temperature
Mixture be sent into electric arc furnaces；
The flue gas in preheating section ontology 1 and the gas after burning are discharged by exhaust outlet 8 at the same time for step 4.
The above described is only a preferred embodiment of the present invention, being not the limitation for doing other forms to the present invention, appoint
What those skilled in the art can use the equivalence enforcement that technology contents disclosed above were changed or be modified as equivalent variations
Example.But without departing from the technical solutions of the present invention, according to the technical essence of the invention to the above embodiments
What simple modification, equivalent variations and remodeling, still falls within the protection scope of technical solution of the present invention.
Claims (6)
- The steel scrap preheating device of electric arc furnace 1. a kind of horizontal continuity feeds, which is characterized in that it includes preheating section ontology, transport roller Road, igniter, gas transmission equipmen and exhaust outlet, the conveyor roller are set to the lower section of the preheating section ontology, the conveyor roller A cavity is formed with there are certain intervals in the preheating section ontology between bottom, the gas transmission equipmen is set in the cavity, described Gas transmission equipmen provides combustion-supporting gas for the preheating section ontology, and the conveyor roller is equipped with venthole, and the igniter is set to The top of the conveyor roller, the both ends of the preheating section ontology are respectively equipped with smoke inlet and feed inlet, the smoke inlet The top of the conveyor roller is set to feed inlet and is arranged close to conveyor roller, and the exhaust outlet is set to the preheating section ontology Top, close to the feed inlet be arranged；The gas transmission equipmen connection intake valve and air inlet pipe, the intake valve connect the air inlet pipe, and the air inlet pipe offer helps Combustion gas body, the gas transmission equipmen are equipped with multiple transfer ports；The exhaust outlet connects exhaust equipment, and the exhaust equipment includes air exhauster and exhaust pipe, the exhaust pipe connection The exhaust outlet, the air exhauster connect exhaust pipe.
- 2. preheating device as described in claim 1, which is characterized in that the gas transmission equipmen is arranged close to the smoke inlet.
- 3. preheating device as described in claim 1, which is characterized in that the transfer port is uniformly distributed setting.
- 4. preheating device as described in claim 1, which is characterized in that the combustion-supporting gas is oxygen, air, natural gas, coal One or more of gas.
- 5. such as preheating device of any of claims 1-4, which is characterized in that the venthole be equipped with it is multiple, in institute It is uniformly distributed on conveyor roller.
- 6. the application method of preheating device as described in any one of claim 1-4 comprising following steps:S1, steel scrap, coal, lime are mixed as mixture, is added on conveyor roller, electric arc furnaces high-temperature flue gas is defeated from inlet port Enter；S2, the mixture are conveyed by conveyor roller, utilize igniter fire；S3, combustion-supporting equipment offer combustion-supporting gas is opened, coal burning releases the heat of heat and electric arc furnaces high-temperature flue gas, by steel scrap The mixture of high temperature is sent into electric arc furnaces by heating, conveyor roller；Gas after S4, at the same time, the intrinsic flue gas of preheating section and burning passes through exhaust outlet discharge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810226021.3A CN108396100B (en) | 2018-03-19 | 2018-03-19 | A kind of horizontal continuity charging steel scrap preheating device of electric arc furnace and application method |
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| CN201810226021.3A CN108396100B (en) | 2018-03-19 | 2018-03-19 | A kind of horizontal continuity charging steel scrap preheating device of electric arc furnace and application method |
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| CN108396100A CN108396100A (en) | 2018-08-14 |
| CN108396100B true CN108396100B (en) | 2019-11-05 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108842032B (en) * | 2018-09-14 | 2023-09-29 | 辽宁科技大学 | Device and method for reduction treatment of scrap steel |
| CN109777913B (en) * | 2019-03-11 | 2023-10-17 | 中冶赛迪工程技术股份有限公司 | Method and device for directly steelmaking by adding iron concentrate powder into high-temperature flue gas of electric furnace |
| CN109797268B (en) * | 2019-03-11 | 2024-04-05 | 中冶赛迪工程技术股份有限公司 | Steelmaking apparatus and method for utilizing electric arc furnace to consume waste |
| CN112146450A (en) * | 2020-09-28 | 2020-12-29 | 东北大学 | Tilting continuous charging electric arc furnace scrap steel preheating device with baffle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101120221B (en) * | 2005-07-14 | 2012-03-14 | 国际技术公司及国际技术公开有限公司 | Apparatus for the combustion of gas exiting from a furnace, for the preheating of scraps entering the furnace itself and related process |
| CN102417948A (en) * | 2011-11-10 | 2012-04-18 | 李士琦 | Device and method for extracting impurity metal elements when electric furnace steelmaking scrap is preheated |
| CN105087862A (en) * | 2015-09-09 | 2015-11-25 | 江苏兴辉炉业科技有限公司 | Scrap steel preheating-type heating furnace for steel production conducted through medium-frequency electric furnace |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1121741A (en) * | 1964-11-12 | 1968-07-31 | Armco Steel Corp | Preheating scrap with controlled oxidation |
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2018
- 2018-03-19 CN CN201810226021.3A patent/CN108396100B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101120221B (en) * | 2005-07-14 | 2012-03-14 | 国际技术公司及国际技术公开有限公司 | Apparatus for the combustion of gas exiting from a furnace, for the preheating of scraps entering the furnace itself and related process |
| CN102417948A (en) * | 2011-11-10 | 2012-04-18 | 李士琦 | Device and method for extracting impurity metal elements when electric furnace steelmaking scrap is preheated |
| CN105087862A (en) * | 2015-09-09 | 2015-11-25 | 江苏兴辉炉业科技有限公司 | Scrap steel preheating-type heating furnace for steel production conducted through medium-frequency electric furnace |
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