CN209412256U - A kind of heated by natural gas converter - Google Patents
A kind of heated by natural gas converter Download PDFInfo
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- CN209412256U CN209412256U CN201822176590.XU CN201822176590U CN209412256U CN 209412256 U CN209412256 U CN 209412256U CN 201822176590 U CN201822176590 U CN 201822176590U CN 209412256 U CN209412256 U CN 209412256U
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- furnace body
- natural gas
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- heated
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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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Abstract
The utility model provides a kind of heated by natural gas converter, it includes furnace body and the water cooling wall that the lower portion of furnace body is arranged in, the furnace interior is provided with heating zone, reducing zone and molten bath, the top of furnace body is arranged in the heating zone, and the lower part of the furnace body is arranged in reducing zone and molten bath；The top of furnace body offers multiple gas mouth blown, and the multiple gas mouth blown is configured to be blown into natural gas or protective gas, and the top of the furnace body is arranged in the multiple gas mouth blown；The top of furnace body is additionally provided with multiple feed inlets, the feed inlet is provided with the baffle that can be opened or closed, the middle position of the baffle is provided with shaft, the baffle can be rotated around the shaft, when not stressing, the baffle is in horizontality so that the feed inlet is closed, and when the dam forces, the baffle can rotate by a certain angle around the shaft so that feed inlet is opened.
Description
Technical field
The utility model relates to field of steel-making, more particularly to a kind of heated by natural gas converter.
Background technique
Blast furnace ironmaking-converter/electric furnace-continuous casting process is generallyd use in modern main body STEELMAKING PRODUCTION, blast furnace ironmaking generally wraps
Pelletizing and sintering, coking, the big process of blast furnace ironmaking three are included, is that energy consumption, pollution are maximum in steel production, invests also larger.
Some use non-blast furnace ironmaking-steel smelting-continuous casting technique, and mainly uses gas-based shaft kiln, coal base in non-blast furnace ironmaking
Shaft furnace, the widely different rotary kiln of coal base, coal base tunnel oven, rotary hearth furnace etc. produce direct reduced iron-electric furnace-continuous casting process.
Some is refined using fused reduction iron-smelting-steel smelting-continuous casting technique (COREX, FINEX technique) melting and reducing and blast furnace
Iron phase ratio, advantage are mainly briquet replacing coke, and technical greatest difficulty is also herein.The mostly of prevalence are by DRI (pad in shoe in the world at present
Connect reduced iron) and the molten two-step method carried out respectively in two shaft furnaces, avoid the insufficient problem of coal intensity；But because of process flow
Long, construction investment is big, and fuel ratio is high, without clear superiority with blast furnace ironmaking compared with, develops in China and is difficult, COREX blast furnace this
One shaft furnace, which is divided into DRI shaft furnace and melts, is divided to shaft furnace two, (perpendicular in fluidized bed although FINEX can directly use Iron Ore Powder
Furnace) it after reduction of iron ore fines, will also need again through briquetting, side, which enters buffering and melts, is divided to two shaft furnaces, and process flow is longer.Such work
Although skill can also produce molten iron discharging, but still consume a certain amount of coke, and fuel ratio increases.
In gas-based shaft kiln reduction, gas base method shaft furnace DRI is not necessarily to coking, but gas consumption is too high, and consumption natural gas is about
400m3/ t, to conversion natural gas (H2+ CO) require high temperature (950 DEG C) high pressure (0.2Mpa or so/cm2), and to high temperature and pressure
Gas (H2+ CO) it to carry out reforming ability reuse.
Coal base shaft furnace, coal base widely different rotary kiln need in coal base tunnel oven to produce DRI (400-800kg/t) coal base with raw coal and turn bottom
Although furnace heats high C ferric oxide pellet with natural gas and restores, the DRI and electric furnace/mine of degree of metalization about 75-85% can only be produced
The mating ironmaking of hot stove.
Utility model content
In order to overcome the drawbacks of the prior art, the utility model provides a kind of heated by natural gas converter, is able to use
Natural gas replaces coal, reduces the generation of exhaust gas waste residue, can be good at protecting environment, is suitble to large-scale promotion.
Specifically, the utility model provides a kind of heated by natural gas converter comprising furnace body and setting, the furnace body
It is internally provided with heating zone, reducing zone and molten bath, the top of furnace body, reducing zone and molten bath setting is arranged in the heating zone
In the lower part of the furnace body, water cooling wall is arranged in lower part outside the furnace body；
The top of the furnace body offers multiple gas mouth blown, and being configured to of the multiple gas mouth blown is blown into richness
O2Hot-air and natural gas or protective gas；
The top of the furnace body is additionally provided with multiple feed inlets, and the feed inlet is provided with the baffle that can be opened or closed,
The middle position of the baffle is provided with shaft, and the baffle can be rotated around the shaft, when not stressing, the gear
Plate is in horizontality so that the feed inlet is closed, and when the dam forces, the baffle can be rotated around the shaft
Certain angle is so that feed inlet is opened.
Preferably, the top of the furnace body is evenly arranged with multiple proportioning burners, the proportioning burner
In being symmetrically tangentially evenly distributed with along heating zone, the proportioning burner is configured to make hot flame gas fast to material in vortex flow shape
Speed heating.
Preferably, the two sides of the baffle are provided with pin shaft.
Preferably, the cooling wall is provided with cooling trough.
Preferably, the upper of furnace body is provided with heat exchanger and flue gas recovery device.
Preferably, the furnace body is connected with molten steel tundish and continuous casting production, in the molten steel tundish and continuous casting
Between packet lower part 1 blowning installation is respectively installed, being configured to of the blowning installation is blown into Ar/N2Molten steel is stirred.
Preferably, the furnace body is circle, and the furnace interior diameter of the furnace body is 1-10m, and furnace inner height is 2-5m, under furnace body
The reducing zone in portion and the height in molten bath are 1-2m, and the heating zone height of upper of furnace body is 1-3m.
Compared with prior art, the utility model has the following beneficial effects:
The utility model provides a kind of natural gas reduction process for making, is able to use natural gas instead of coal, will not produce
Raw smoke sludge, and the generation of the exhaust gas such as sulfide, nitrogen oxides can be reduced, it can be good at protecting environment, be suitble to big
Scale is promoted., both can be with direct steelmaking using natural gas and oxygen-enriched air combined heat meanwhile in steelmaking process, it can also be with
It first restores and makes steel again, simple process is environmental-friendly.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the heated by natural gas converter of the utility model；
Fig. 2 is the schematic internal view of the utility model.
Specific embodiment
The exemplary embodiment, feature and aspect of the utility model are described in detail below with reference to attached drawing.It is identical in attached drawing
Appended drawing reference indicate element functionally identical or similar.Although the various aspects of embodiment are shown in the attached drawings, remove
It non-specifically points out, it is not necessary to attached drawing drawn to scale.
Specifically, the utility model provides a kind of heated by natural gas converter, as shown in Figures 1 and 2, as shown in Figure 1, day
Right gas heating converter includes furnace body 1 and the water cooling wall 2 that 1 lower part of furnace body is arranged in, furnace body 1 be internally provided with heating zone,
The top of furnace body 1 is arranged in reducing zone and molten bath, heating zone, and the lower part of furnace body 1 is arranged in reducing zone and molten bath.Furnace body 1
Inside is put into metallized pellet 100, and the two sides of water cooling wall 2 are provided with spray cooling nozzle 4, are provided with slag-drip opening on the right side of furnace body
5,
Preferably, two sides of furnace body 1 offer multiple gas mouth blown 3, and multiple gas mouth blown 3 are configured to
It is blown into natural gas or protective gas.
Preferably, the top of furnace body 1 is provided with multiple feed inlets 6, and feed inlet is provided with the baffle that can be opened or closed, gear
The middle position of plate is provided with shaft, and baffle can be rotated around the shaft, when not stressing, baffle be in horizontality so that
Feed inlet is closed, and when dam forces, baffle can rotate by a certain angle around the shaft so that feed inlet is opened.The molten steel refined
It is flowed out by the tapping hole 7 of bottom of furnace body, into steel ladle 9, enters continuous casting production 10 later, and successively pass through 11 He of crystallizer
Horizontal caster 12, obtains continuous casting steel billet.
Preferably, 1 blowning installation 13 is respectively installed in steel ladle 9 and 10 lower part of continuous casting production, blowning installation 13 is matched
It sets for being blown into Ar/N2Molten steel is stirred.
Preferably, the top of furnace body 1 is evenly arranged with multiple ratio adjusting valves.
Preferably, the top of furnace body 1 is evenly arranged with multiple proportioning burners 16, and institute's proportioning burner is in pair
Title tangentially uniformly divides along heating zone, and proportioning burner is configured to make hot flame gas quickly to add in vortex flow shape to material
Heat.
Preferably, 1 top of furnace body is provided with heat exchanger 14 and flue gas recovery device 15, and flue gas is by heat exchanger to material
It is preheated (100-500 DEG C) with air, then recycles ZnO etc. into system for cleaning fume.
Specific embodiment one utilizes the heating furnace Scrap Smelting
The component list for the molten steel that Scrap Smelting obtains is as shown in table 1:
Table 1: the molten steel of scrap melting: main component is as follows: (%)
| Sample | Fe | C | Si | Mn | P |
| 001 | Surplus | 0.167 | 0.019 | 0.035 | 0.013 |
| Sample | S | Al | Cu | Ni | Cr |
| 001 | 0.013 | < 0.001 | 0.011 | 0.005 | 0.023 |
Specific embodiment two: reducing and smelting is carried out using the heating furnace
S1, selection C content are 10-20% ferric oxide pellet as raw material；
The preparation of high C ferric oxide pellet:
Raw material: Fe concentrate powder (Fe >=68%, S:0.036, P:0.025)+water+12% graphite (99.5%)+pelletizing
It is dry (150 DEG C) that binder 2% carries out pelletizing (￠ 40mm)-.2% CaO and CaF is added when charging every time2Mixture,
Middle CaO is 60%, CaF2It is 40%.
S2, ferric oxide pellet is restored using heated by natural gas converter, temperature is controlled in 1050-1200
DEG C, furnace bottom is blown into natural gas, and the pressure that furnace bottom is blown into natural gas is controlled in 1000-3000pa/cm2, ferric oxide pellet is carried out
The reaction equation of reduction is as follows,
CH4-H2+C
C+O2-CO
FexOy+CO--Fe+CO2
FexOy+H2-Fe+H2O；
S3, material is added portionwise, the material bed thickness control of every batch of is in 100-200mm, every batch of material bed heating time
For 20--30min, when being heated to every batch of is material bed, on the top of heated by natural gas converter with 2-20m3/ h is passed through day
Right gas, the intracorporal pressure control temperature in 100-300pa, fusing of furnace is to melt 1.5h at 1580 DEG C.
Table 2 uses high C ferric oxide pellet reducing and smelting, and molten steel main component is as follows: (%)
Finally, it should be noted that above-described each embodiment is merely to illustrate the technical solution of the utility model, rather than
It is limited；Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art
It is understood that it can still modify to technical solution documented by previous embodiment, or to part of or whole
Technical characteristic is equivalently replaced；And these modifications or substitutions, it does not separate the essence of the corresponding technical solution the utility model
The range of each embodiment technical solution.
Claims (7)
1. a kind of heated by natural gas converter, it is characterised in that: it includes furnace body and setting, and the furnace interior, which is provided with, to be added
The top of furnace body is arranged in hot-zone, reducing zone and molten bath, the heating zone, and the furnace body is arranged in reducing zone and molten bath
Lower part, water cooling wall is arranged in lower part outside the furnace body；
The top of the furnace body offers multiple gas mouth blown, and the multiple gas mouth blown is configured to be blown into rich O2Heat
Air and natural gas or protective gas；
The top of the furnace body is additionally provided with multiple feed inlets, and the feed inlet is provided with the baffle that can be opened or closed, described
The middle position of baffle is provided with shaft, and the baffle can be rotated around the shaft, when not stressing, at the baffle
In horizontality so that the feed inlet is closed, when the dam forces, the baffle can rotate certain around the shaft
Angle is so that feed inlet is opened.
2. heated by natural gas converter according to claim 1, it is characterised in that: the top of the furnace body is evenly arranged with
Multiple proportioning burners, the proportioning burner is in symmetrically tangentially uniformly distributed along heating zone, the proportion adjustment burning
Device is configured to make hot flame gas quickly to heat in vortex flow shape to material.
3. heated by natural gas converter according to claim 1, it is characterised in that: the two sides of the baffle are provided with pin
Axis.
4. heated by natural gas converter according to claim 1, it is characterised in that: the cooling wall is provided with cooling water
Slot.
5. heated by natural gas converter according to claim 1, it is characterised in that: the upper of furnace body is provided with heat exchanger
And flue gas recovery device.
6. heated by natural gas converter according to claim 1, it is characterised in that: the furnace body is connected with molten steel tundish
And continuous casting production, 1 blowning installation, the blowning installation are respectively installed in the molten steel tundish and continuous casting production lower part
Be configured to be blown into Ar/N2Molten steel is stirred.
7. heated by natural gas converter according to claim 1, it is characterised in that: the furnace body is circle, the furnace body
Furnace interior diameter be 1-10m, furnace inner height is 2-5m, and the height in the reducing zone of lower portion of furnace body and molten bath is 1-2m, upper of furnace body
Heating zone height be 1-3m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822176590.XU CN209412256U (en) | 2018-12-25 | 2018-12-25 | A kind of heated by natural gas converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822176590.XU CN209412256U (en) | 2018-12-25 | 2018-12-25 | A kind of heated by natural gas converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209412256U true CN209412256U (en) | 2019-09-20 |
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ID=67939072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822176590.XU Active CN209412256U (en) | 2018-12-25 | 2018-12-25 | A kind of heated by natural gas converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209412256U (en) |
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2018
- 2018-12-25 CN CN201822176590.XU patent/CN209412256U/en active Active
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