CN201648429U - Converting furnace for smelting reduction iron making - Google Patents
Converting furnace for smelting reduction iron making Download PDFInfo
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- CN201648429U CN201648429U CN2010201213924U CN201020121392U CN201648429U CN 201648429 U CN201648429 U CN 201648429U CN 2010201213924 U CN2010201213924 U CN 2010201213924U CN 201020121392 U CN201020121392 U CN 201020121392U CN 201648429 U CN201648429 U CN 201648429U
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- furnace
- slag
- smelting reduction
- iron
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Abstract
The utility model discloses a converting furnace for smelting reduction iron making, which comprises a furnace body, a water cooling furnace opening, a slag discharge opening, a tap hole, a fireproof material, a furnace case, a tilting device and a smoke hood. The utility model is characterized in that the inner shape of the furnace body is a ball shape, the fireproof material is sprayed and coated on the inner surface, the outside of the furnace body is in a framework structure and is welded by steel plates, the front side of the furnace body is the slag discharge opening, the back side of the furnace body is the tap hole, the top is the arc-shaped water cooling furnace opening, and the water cooling furnace opening is matched with the arc-shaped smoke hood arranged at the upper part of the water cooling furnace opening and is used for inserting a combined spraying gun and recycling and reusing generated smoke gas. The utility model uses the combined spraying gun for smelting reduction iron making, can continuously carry out smelting reduction iron making production, can discharge furnace slag and molten iron at proper time according to the production requirements, can improve the utilization efficiency of secondary combustion heat of smelting reduction reaction, and can reduce the raw fuel consumption and the production cost.
Description
Technical field
The utility model relates to the melting and reducing converter that a kind of fused reduction iron-smelting is used, this converter can be when smelting the production molten iron continuously, fascinate by body of heater and to discharge slag and molten iron, thereby reduce raw material and fuel consumption, improve coal gas secondary combustion heat utilization efficiency, and the continuous production molten iron, be applicable to black and nonferrous metallurgy industry.
Background technology
Modern blast furnace is along with the continuous expansion of the type of furnace, and is more and more higher to the requirement of crude fuel, and blast furnace more and more exposes the limitation of itself, makes traditional Iron And Steel Industry face resource, environmental protection, the various difficult problems of economic dispatch.Non-blast furnace ironmaking technology does not need the sintering of powdered iron ore and makes ball owing to do not use coke, has efficiently to utilize resource, environmental pollution little, and characteristics such as enhance productivity, and is to realize that ironmaking produces inexorable trend efficient, long-lived, the low consumption development.But, because ironmaking technique of fusion and reduction is by hot environment, breeze is melted, and ferric oxide in the reduction with carbon slag, the secondary combustion that utilizes simultaneously the coal gas that produces in the reduction process again provides heat for fusion and reduction reaction, this just makes the melting and reducing furnace heat, react too concentrated, DIOS technology as Japan, Australian HIsmelt technology and AusIron technology, the AISI technology of the U.S. and the Romelt technology of USSR (Union of Soviet Socialist Republics) etc., this just makes FeO too high levels in the melting and reducing in-furnace slag, the molten bath is stirred excessive in addition, the refractory corrosion at furnace lining position is serious, and the cupola well life-span is too short.DIOS and Remolt technology attempt to improve by water-cooling method the life-span of fire proof material of furnace lining, but the furnace lining ultimate life still can not be above 3 months.Simultaneously, above technology also because the utilization efficiency of heat energy that secondary combustion produces is lower, causes the coal consumption of smelting reduction process too high, and the molten iron production cost is high.In addition, FeO content is about about 5.0% in the final slag of discharging of fusion reducing furnace, and carries about 5.0% granulated iron secretly, causes whole technology iron loss too high, serious waste iron ore deposit, be difficult to carry out industrialized production.
At present, the direct use top-blown oxygen converter of exploitation carries out the technology of fused reduction iron-smelting both at home and abroad, as DIOS, multiple gun stove etc., it mainly is the experience of having used for reference modern top-blown oxygen converter, utilize converter batch production mode to produce, obtained higher furnace lining work-ing life, and attempt to transform by blowing device and secondary combustion mode to smelting reduction process, improve the heat transfer efficiency of molten iron bath and the utilising efficiency of secondary combustion heat, to reduce coal powder consumption.But the batch production mode that adopts converter brought again simultaneously tap a blast furnace, deslagging and repair problems such as stove off period body of heater thermosteresis is excessive, production efficiency is low, compare with modern large blast furnace, still do not have competitive power.
Summary of the invention
For solving the deficiencies in the prior art, the converter that the utility model provides a kind of fused reduction iron-smelting to use.This converter can be carried out fused reduction iron-smelting production continuously in certain stove labour phase, can improve the efficiency of utilization of fusion reduction reaction to greatest extent according to timely discharge section slag of technological operation needs and molten iron again simultaneously.
The technical scheme that the utility model adopted is: fused reduction iron-smelting is a ball-type with type in the converter, and body of heater fascinates to front side or rear side; The front side of body of heater is provided with slag-drip opening, and rear side is provided with iron notch; The petticoat pipe on the furnace water-cooling mouth of upper of furnace body and converter top is camber; Furnace shell internal surface sprayable refractory is used for the furnace shell protection and reduces thermosteresis, and the furnace shell outside is a skeleton construction, is welded by steel plate; can improve the physical strength of furnace shell; and attenuate furnace shell thickness, the heat-transfer capability of raising furnace shell self, protection converter lining refractory materials.
Furnace water-cooling mouth cooperates with the camber petticoat pipe on its top, is used for the insertion of composite lance and the recovery that produces flue gas, dust.
The inclination angle of discharging slag is for leaning forward 10～40 °, and the inclination angle of discharging molten iron is 10～35 ° of hypsokinesis
Body of heater inside is divided into three districts: the bottom is the molten iron district that melting and reducing produces molten iron, and the middle part is the slag district that carries out fusion reduction reaction, and slag district upper space is the secondary combustion zone.
During ordinary production, in combination spray gun inserted stove from furnace water-cooling mouth, wherein the burning spray gun in the centre of combination spray gun directly inserted in the molten bath and burns, to heating and stir in the molten bath; Breeze and macrobead coal dust add the molten bath from the sleeve of combination spray gun, for fusion and reduction reaction provide former, fuel and flux; The secondary combustion spray gun burns the coal gas of fusion and reduction generation at weld pool surface, be the molten bath heating.The height of combination spray gun can carry out lift adjustment automatically along with the lifting of bath surface height.
When carrying out fused reduction iron-smelting production, combination spray gun inserts the molten bath from the top furnace water-cooling mouth, burns, feeds in raw material and secondary combustion; After the in-furnace slag liquid level reaches certain height, can continue under winding-up, the reinforced situation the moving body of heater of inclination forward at spray gun, the discharge section slag is treated again body of heater to be gone back to the home position after the slag liquid level reaches suitable height, also body of heater can be kept suitable inclination angle continuous discharging slag.
In addition, can also be in for the previous period at deslagging by stopping the adding of ore and flux, continue to add coal dust, carry out the burning of burning spray gun and the secondary combustion that produces coal gas, in order to reduce the content of FeO in the slag district slag, and the granulated iron of carrying secretly in the precipitation slag, treat in the slag that FeO content is reduced to discharge section slag behind the certain value.When the molten iron that produces in the stove was accumulated to certain amount, the moving body of heater of inclination was discharged molten iron by row's iron mouth backward.
Ball-type body of heater of the present utility model work-ing life is 3～4 months, the furnace lining refractory materials is forced can prolongs life to 5～7 after the cooling month, should prepare standby converter when adopting the utility model to carry out industrialized production for this reason, damaged at the furnace lining refractory materials to the to a certain degree back standby converter of replacing in time, guarantee long-term continuous production.
The beneficial effects of the utility model are: this converter cooperates with combination spray gun with fused reduction iron-smelting, promptly can carry out fused reduction iron-smelting production continuously, can in time discharge slag and molten iron according to producing needs again, can improve the efficiency of utilization of fusion reduction reaction to greatest extent, reduce original fuel consumption and ironmaking production cost, reach the purpose of industrial applications.
Description of drawings
Below in conjunction with drawings and Examples the utility model is described further.
Fig. 1 is the orthogonal view of melting and reducing with converter.
Fig. 2 is the sectional side view of melting and reducing with converter.
Fig. 3 is the lean forward deslagging synoptic diagram of melting and reducing with converter.
Fig. 4 for melting and reducing with the hypsokinesis of the converter synoptic diagram that taps a blast furnace.
Wherein, 1, petticoat pipe, 2, furnace water-cooling mouth, 3, combination spray gun, 4, the slag district, 5, slag-drip opening, 6, the molten iron district, 7, refractory materials, 8, furnace shell, 9, iron notch, 10, the furnace shell framework, 11, gudgeon fascinates
Embodiment
The rotary converter that the utility model provides a kind of fused reduction iron-smelting to use comprises petticoat pipe 1, furnace water-cooling mouth 2, slag-drip opening 5, refractory materials 7, furnace shell 8, iron notch 9, furnace shell framework 10 and the gudgeon 11 that fascinates.
The interior type of fusion reducing furnace is a ball-type; the internal surface of furnace shell 8 is the refractory materials 7 of spraying; furnace shell framework 10 is welded by steel plate; can increase the physical strength of the capacity and the raising body of heater of body of heater; the thickness that helps attenuate furnace shell steel plate improves the body of heater heat-transfer capability, the refractory materials of protection furnace lining; and help controlling the rotation of body of heater, realize that body of heater inclination forwards, backwards is moving.
The front side of body of heater is a slag-drip opening 5, rear side is an iron notch 9, the top is a camber furnace water-cooling mouth 2, the top of furnace water-cooling mouth 2 is camber petticoat pipe 1, furnace water-cooling mouth 2 and petticoat pipe 1 cooperate, the insertion and the fusion reduction reaction that are used for combination spray gun 3 produce the recycling of flue gas, and help reducing the loss of furnace heat.
The inside of melting and reducing body of heater is divided into three districts, and the bottom is the molten iron district 6 that melting and reducing produces, and the middle part is the slag district 4 that fusion reduction reaction carries out, and the top in slag district 4 is the secondary combustion zone that fusion and reduction produce coal gas.
This technology can be carried out negative-pressure operation according to the production technique of top-blown oxygen converter, and the coal gas that melting and reducing produces can perfect combustion or partial combustion.Therefore, the high-temperature flue gas that effluxes need carry out waste heat recovery, coal gas dust removal and recovery etc.
During ordinary production, combination spray gun 3 inserts in the stove in the middle of furnace water-cooling mouth 2 and petticoat pipe 1, wherein the central burner spray gun of combination spray gun 3 directly inserts in the slag district 4 and burns, breeze and macrobead coal dust add the molten bath from the sleeve of combination spray gun 3, the secondary combustion spray gun burns the coal gas that reduction reaction produces on the surface in slag district 4, add hot slag district 4.The height of combination spray gun 3 can the lifting along with the lifting of slag district 4 liquid levels, and the rifle position can be adjusted automatically by computer.
When the liquid level in in-furnace slag district 4 reached certain height, the moving body of heater of inclination forward by slag-drip opening 5 discharge section slags, went back to the home position with body of heater after reaching suitable height.When the molten iron in molten iron district 6 was accumulated to certain amount in the stove, the moving body of heater of inclination was discharged a certain amount of molten iron by row's iron mouth 9 backward.
In order to reduce the granulated iron of carrying secretly in the content that effluxes FeO in the slag and the slag, can add at the ore that deslagging stops combination spray gun 3 in for the previous period, only add part lump coal, and proceed the burning of burning spray gun and secondary combustion spray gun, in order to improve the temperature in slag district 4, improve the flowability of slag and reduce the FeO content in whole slag district 4, the part granulated iron of carrying secretly in the precipitation slag discharges slag after a while again.The liquid level for the treatment of the slag district goes back to the home position with body of heater when reaching the appropriate location again, adds the ore deposit again and proceeds to produce.
Claims (3)
1. fused reduction iron-smelting converter comprises petticoat pipe (1), furnace water-cooling mouth (2), refractory materials (7), furnace shell (8), the gudgeon that fascinates (11), it is characterized in that: type is a ball-type in the converter, and body of heater fascinates to front side or rear side; The front side of body of heater is provided with slag-drip opening (5), and rear side is provided with iron notch (9); The petticoat pipe (1) on furnace water-cooling mouth of upper of furnace body (2) and converter top is camber; The outside of furnace shell (8) is furnace shell framework (10).
2. fused reduction iron-smelting converter according to claim 1 is characterized in that: the inclination angle of discharging slag is for leaning forward 10～40 °, and the inclination angle of discharging molten iron is 10～35 ° of hypsokinesis.
3. fused reduction iron-smelting converter according to claim 1 is characterized in that: described furnace shell framework (10) is welded by steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201213924U CN201648429U (en) | 2010-02-26 | 2010-02-26 | Converting furnace for smelting reduction iron making |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201213924U CN201648429U (en) | 2010-02-26 | 2010-02-26 | Converting furnace for smelting reduction iron making |
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| Publication Number | Publication Date |
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| CN201648429U true CN201648429U (en) | 2010-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010201213924U Expired - Fee Related CN201648429U (en) | 2010-02-26 | 2010-02-26 | Converting furnace for smelting reduction iron making |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012159567A1 (en) * | 2011-05-24 | 2012-11-29 | 江西稀有稀土金属钨业集团有限公司 | Combined furnace system for fire refining red impure copper |
| CN103954127A (en) * | 2014-05-29 | 2014-07-30 | 芜湖长启炉业有限公司 | Double-inclination aluminum melting tank |
| CN105803147A (en) * | 2016-04-06 | 2016-07-27 | 安徽工业大学 | Method for smelting and reducing iron ores through converter steelmaking system |
| CN113913578A (en) * | 2021-08-16 | 2022-01-11 | 北京科技大学 | Method for increasing temperature of molten iron in molten pool by using high-temperature exhaust flue gas |
-
2010
- 2010-02-26 CN CN2010201213924U patent/CN201648429U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012159567A1 (en) * | 2011-05-24 | 2012-11-29 | 江西稀有稀土金属钨业集团有限公司 | Combined furnace system for fire refining red impure copper |
| US9464845B2 (en) | 2011-05-24 | 2016-10-11 | Jiangxi Rare Earth And Rare Metals Tungsten Group Corporation | Combined furnace system for fire refining red impure copper |
| CN103954127A (en) * | 2014-05-29 | 2014-07-30 | 芜湖长启炉业有限公司 | Double-inclination aluminum melting tank |
| CN105803147A (en) * | 2016-04-06 | 2016-07-27 | 安徽工业大学 | Method for smelting and reducing iron ores through converter steelmaking system |
| CN113913578A (en) * | 2021-08-16 | 2022-01-11 | 北京科技大学 | Method for increasing temperature of molten iron in molten pool by using high-temperature exhaust flue gas |
| CN113913578B (en) * | 2021-08-16 | 2022-08-23 | 北京科技大学 | Method for increasing temperature of molten iron in molten pool by using high-temperature exhaust flue gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee before: Capital Iron & Steel General Company |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20190226 |