CN202786298U - Reduction furnace equipment capable of reducing iron directly - Google Patents
Reduction furnace equipment capable of reducing iron directly Download PDFInfo
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- CN202786298U CN202786298U CN 201220160053 CN201220160053U CN202786298U CN 202786298 U CN202786298 U CN 202786298U CN 201220160053 CN201220160053 CN 201220160053 CN 201220160053 U CN201220160053 U CN 201220160053U CN 202786298 U CN202786298 U CN 202786298U
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Abstract
The utility model relates to reduction furnace equipment capable of reducing iron directly, and belongs to the technical field of direct iron reduction. The reduction furnace equipment comprises a furnace roof, a combustion-boosting wind pipeline, a gas pipeline, a burning nozzle, a material tray, a supporting base, a curved seal, a furnace car, a combustion chamber, a material pool and a thermal storage radiation chamber, wherein the combustion chamber is arranged between the furnace roof and the material pool; the burning nozzle is arranged on the side wall of the combustion chamber; the combustion-boosting wind pipeline and the gas pipeline are connected with the burning nozzle; the material tray is supported by the supporting base arranged at the upper end of the furnace car; the thermal storage radiation chamber is a space formed among the material tray, the supporting base and the furnace car; and the furnace car is connected with the furnace through the curved seal. After the reduction furnace equipment is preheated, a reducing agent for iron materials to be reduced is placed in the material tray of the furnace car in a mixing manner; a covering agent is horizontally placed above the mixed materials through a material applier; and the furnace car is pulled into the furnace to carry out a reduction operation to obtain a reduced iron product. The reduction furnace equipment has the advantages of energy conservation, reduction time conservation and high recovery rate of reduced iron.
Description
Technical field
The utility model relates to the direct-reduced iron technical field, is specifically related to a kind of reduction kiln furnace apparatus of direct-reduced iron.
Background technology
China is the large crude steel output of the first in the world state, and output of steel was broken through 700,000,000 tons in 2011, and year needs more than 9,000 ten thousand tons of steel scraps, and the reduced iron demand is 5,000,000 tons.3,000,000 tons of China's year import reduced irons, and reduced iron (sponge iron) annual production only is 600,000 tons.China is again the abundant country of a poor iron ore deposit, and low poor slow-witted ore deposit accounts for iron ore deposit more than 97%, but annual also the needs from the iron ore of 600,000,000 tons of external imports.In addition, China also has more than one hundred million tons the iron-containing wastes such as sulfate slag, copper ashes, dedusting ash to produce every year.Now, China is the abundant countries of mill coal reserves, and coking coal resource takes place frequently day by day, and therefore country puts into effect relevant policies, encourage growth direct-reduced iron and the technological development of Fei Jiao iron-smelting process and application.It is a cause that change is extremely urgent that the low poor slow-witted ore deposit that the output of raising reduced iron and quality and exploitation China are a large amount of and iron-containing waste make its resource.
Coal-based tunnel furnace pot type method is in China's 30 years history of passing by, and coal-based tunnel furnace pot type method technique is more stable, ripe, and project distributes relatively general.At present, China's year 600000 tons of direct-reduced irons (sponge iron) mostly are that coal-based tunnel furnace pot type method is produced.
Traditional coal-based tunnel furnace pot type method is produced direct-reduced iron (sponge iron), must adopt expensive fire-resistant can (the ton reduced iron consumes fire-resistant can generally at 230-280 yuan/ton), the technique backwardness causes that energy consumption is high, the recovery time is long, the labor force consumes the reasons such as height, poor product quality, causes the practical problemss such as production run cost height, slack market.Although making China is output of steel the first big country in the world, but the annual production of direct-reduced iron causes the direct-reduced iron of Iron And Steel Company that a large amount of breach is arranged not as good as the output of India's two weeks, a large amount of external direct-reduced irons of import of having to high price.Coal-based tunnel furnace pot type method is produced the present technique of reduced iron, can only adopt fine iron breeze or the iron scale direct-reduction reduced iron of TFe 〉=66%.Traditional coal-based tunnel furnace pot type method also can't utilize low grade ore and iron-containing waste direct-reduction to isolate high-grade reduced iron product.
Summary of the invention
The purpose of this utility model is the deficiency that exists for prior art, and a kind of reduction kiln furnace apparatus of direct-reduced iron is provided, and in comprehensive reduction cost, by the reduction to low grade ore and iron-containing waste, isolates high-grade reduced iron product.
The reduction kiln furnace apparatus of direct-reduced iron of the present utility model, comprise kiln top, combustion air pipeline, gas pipeline, burner, charging tray, supporting seat, bent envelope, kiln car, combustion chamber, material pond and accumulation of heat radiation chamber, be the combustion chamber between kiln top and the material pond wherein, sidewall of combustion chamber is provided with burner, and combustion air pipeline, gas pipeline link to each other with burner, and the supporting seat that the kiln car upper end arranges is supporting charging tray, space between charging tray, supporting seat and the kiln car is the accumulation of heat radiation chamber, and kiln car is connected with kiln by bent envelope.
Described charging tray adopts silicon carbide material.
The reduction kiln furnace apparatus that employing is stated prepares direct-reduced iron, and step is as follows:
(1) preheating kiln furnace apparatus makes its temperature reach 1110～1200 ℃;
(2) reduced material being made diameter is to mix for 3:1 in mass ratio with reductive agent behind Φ 8～16mm pelletizing, and mixture packed in the charging tray of kiln car, described reductive agent is coal dust, its chemical ingredients is by mass percentage for fixed carbon is 66.94%, ash is 21.43%, fugitive constituent 7.96%, and moisture content is 3.0%, S is 0.67%; (3) by material distributing machine with tile mixture top of insulating covering agent, tiling thickness is 10～25mm, kiln car is pushed kiln, its chemical ingredients of described insulating covering agent is by mass percentage: fixed carbon 35～45%, fugitive constituent 2.5～6.5%, ash content 50～55%, moisture content 3.0～5.0%, basicity R is 0.15～0.2, and granularity is 0.1～3mm;
(4) reduced material is reduced under reducing gas atmosphere and obtain the reduced iron product, reduction temperature is 1180～1320 ℃, and the recovery time is 4～10 hours, and described reducing gas is H
2Or CO.
Above-mentioned reduced material is antelope stone ore, roe shape Chi Kuang, rhombohedral iron ore, limonite, spathic iron ore, red soil nickel ore, ferrous manganese ore, chromite, paigeite, vanadium titano-magnetite, rich titanium slag and the sulfate slag of iron content, plumbous cadmia, copper ashes, dedusting ash or dedusting mud.
80% coal tar cycling and reutilization in the above-mentioned reductive agent tail powder.
Compare with technology with existing, the utility model characteristics and beneficial effect thereof are:
The utility model kiln charging tray is silicon carbide material, and its thermal conductivity is very high, and conduction and radiations heat energy effect are better; Owing to after expecting the insulating covering agent melted by heating above the pond, can form rapidly the melting interlayer of 10～25mm, it has played heat storage when the mixture in the material pond conducts heat effect enables to measure better utilised, has saved the energy.
In the kiln high temperature reduction stage, the melting interlayer that insulating covering agent forms makes mixture material pond be in the semitight state, and reductive agent has formed main component under 1200～1320 ℃ of temperature be H
2Reducing gas with CO, reducing gas air pressure is higher than mark air pressure 300～1100Pa, it can only be from the volatilization of the slit of melting interlayer, and the burning indoor oxygen can't the contact mixture material, and reduced material is reduced under reducing gas atmosphere, when kiln car runs to cooling section, the melting interlayer is solidified into one gradually with the reduction of temperature, has prevented that effectively oxygen from entering in the material pond, prevent the reduced iron secondary oxidation, thereby make the reduced material degree of metalization be up to 99%; The U-shaped structure design of kiln charging tray of the present invention makes charging tray form a large heat storage in the high temperature section of reduction kiln, and the reduced material place in the material pond is in not state of horse always; The supporting seat that four jiaos of places, kiln car charging tray bottom arrange makes the charging tray bottom form the accumulation of heat radiation chamber, and the temperature that is conducive to reduced material is relatively even, has reduced the recovery time; Song that the charging tray of kiln car has envelope prevents from altering on burning hot and preventing from expecting that the reducing gas in the pond is descending, plays simultaneously the effect of material pond base plate.
The recovery time that conventional tunnel kiln pot type method is produced reduced iron is generally: clay tank 28～31 hours, silicon carbide tank 38～42 hours, adopt the utility model direct-reduced iron, need not expensive fire-resistant can, reduce more than 200 yuan/ton of production run cost, and the recovery time shortens greatly, and the recovery time is 4～10 hours; The present invention need not to consider water content, fine ore rate, normal temperature and the severe condition such as hot strength, tumbler index of pelletizing balling-up, expects in the pond as long as pelletizing can be packed into.
Description of drawings
Fig. 1 is the structural representation of the reduction kiln furnace apparatus of direct-reduced iron of the present utility model, wherein kiln top 1, combustion air pipeline 2, gas pipeline 3, burner 4, charging tray 6, supporting seat 7, bent envelope 8, kiln car 9, combustion chamber 10, material pond 11, accumulation of heat radiation chamber 12.
Embodiment
Below in conjunction with embodiment the utility model is elaborated.
Following embodiment adopts pilot scale direct-reduced iron furnace equipment, long 22.5 meters, high 2.5 meters, wide 1.8 meters, comprise kiln top 1, combustion air pipeline 2, gas pipeline 3, burner 4, charging tray 6, supporting seat 7, bent envelope 8, kiln car 9, combustion chamber 10, material pond 11 and accumulation of heat radiation chamber 12, be combustion chamber 10 between kiln top 1 and the material pond 11 wherein, combustion chamber 10 sidewalls are provided with burner 4, combustion air pipeline 2, gas pipeline 3 links to each other with burner 4, the supporting seat 7 that kiln car 9 upper ends arrange is supporting charging tray 6, charging tray 6, space between supporting seat 7 and the kiln car 9 is accumulation of heat radiation chamber 12, and kiln car 9 is connected with kiln by bent envelope 8.
Described charging tray 6 adopts silicon carbide material.
Adopt the reduction kiln furnace apparatus direct-reduced iron of above-mentioned direct-reduced iron, carry out as follows:
(1) preheating kiln furnace apparatus makes its temperature reach 1110～1200 ℃;
(2) reduced material being made diameter is to mix for 3:1 in mass ratio with reductive agent behind Φ 8～16mm pelletizing, and mixture packed in the charging tray of kiln car, described reductive agent is coal dust, its chemical ingredients is by mass percentage for fixed carbon is 66.94%, ash is 21.43%, fugitive constituent 7.96%, and moisture content is 3.0%, S is 0.67%; (3) by material distributing machine with tile mixture top of insulating covering agent, tiling thickness is 10～25mm, kiln car is pushed kiln, its chemical ingredients of described insulating covering agent is by mass percentage: fixed carbon 35～45%, fugitive constituent 2.5～6.5%, ash content 50～55%, moisture content 3.0～5.0%, basicity R is 0.15～0.2, and granularity is 0.1～3mm;
(4) reduced material is reduced under reducing gas atmosphere and obtain the reduced iron product, reduction temperature is 1180～1320 ℃, and the recovery time is 4～10 hours, and described reducing gas is H
2Or CO.
Above-mentioned reduced material is antelope stone ore, roe shape Chi Kuang, rhombohedral iron ore, limonite, spathic iron ore, red soil nickel ore, ferrous manganese ore, chromite, paigeite, vanadium titano-magnetite, rich titanium slag and the sulfate slag of iron content, plumbous cadmia, copper ashes, dedusting ash or dedusting mud.
80% coal tar cycling and reutilization in the above-mentioned reductive agent tail powder.
Claims (2)
1. the reduction kiln furnace apparatus of a direct-reduced iron, it is characterized in that comprising kiln top (1), combustion air pipeline (2), gas pipeline (3), burner (4), charging tray (6), supporting seat (7), bent envelope (8), kiln car (9), combustion chamber (10), material pond (11) and accumulation of heat radiation chamber (12), be combustion chamber (10) between kiln top (1) and the material pond (11) wherein, combustion chamber (10) sidewall is provided with burner (4), combustion air pipeline (2), gas pipeline (3) links to each other with burner (4), the supporting seat (7) that kiln car (9) upper end arranges is supporting charging tray (6), charging tray (6), space between supporting seat (7) and the kiln car (9) is accumulation of heat radiation chamber (12), and kiln car (9) is connected with kiln by bent envelope (8).
2. the reduction kiln furnace apparatus of a kind of direct-reduced iron according to claim 1 is characterized in that described charging tray (6) adopts silicon carbide material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220160053 CN202786298U (en) | 2012-04-16 | 2012-04-16 | Reduction furnace equipment capable of reducing iron directly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220160053 CN202786298U (en) | 2012-04-16 | 2012-04-16 | Reduction furnace equipment capable of reducing iron directly |
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| CN202786298U true CN202786298U (en) | 2013-03-13 |
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| CN 201220160053 Expired - Lifetime CN202786298U (en) | 2012-04-16 | 2012-04-16 | Reduction furnace equipment capable of reducing iron directly |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834759A (en) * | 2013-12-19 | 2014-06-04 | 辽宁博联特冶金科技有限公司 | Cycling heated iron-reducing kiln, and method for reducing iron |
| CN110938725A (en) * | 2019-11-25 | 2020-03-31 | 中南大学 | Efficient reduction system and method for metal oxide |
| CN111485047A (en) * | 2020-06-16 | 2020-08-04 | 王东亮 | Reduction kiln equipment for directly reducing iron |
-
2012
- 2012-04-16 CN CN 201220160053 patent/CN202786298U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834759A (en) * | 2013-12-19 | 2014-06-04 | 辽宁博联特冶金科技有限公司 | Cycling heated iron-reducing kiln, and method for reducing iron |
| CN110938725A (en) * | 2019-11-25 | 2020-03-31 | 中南大学 | Efficient reduction system and method for metal oxide |
| CN110938725B (en) * | 2019-11-25 | 2020-10-16 | 中南大学 | Efficient reduction system and method for metal oxide |
| CN111485047A (en) * | 2020-06-16 | 2020-08-04 | 王东亮 | Reduction kiln equipment for directly reducing iron |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: LIAONING BOLIAN SPECIAL METALLURGY TECHNOLOGY CO., Free format text: FORMER NAME: SHENYANG BRILLIANT SMELTING REDUCTION TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 113123, east of Zhongxing Street, Fushun Economic Development Zone, Liaoning Province, seven North of Shen Dong Road, block D14d Patentee after: Liaoning Brilliant Metallurgy Technology Co., Ltd. Address before: 183 110006 South five Avenue, Heping District, Liaoning, Shenyang Patentee before: Shenyang Brilliant Smelting Reduction Technology Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200731 Address after: Room 204, No.11, Shendong 7th Road, Shenfu New District, Fushun City, Liaoning Province Patentee after: Liaoning Ruifan Metallurgical Technology Co., Ltd Address before: 113123, east of Zhongxing Street, Fushun Economic Development Zone, Liaoning Province, seven North of Shen Dong Road, block D14d Patentee before: LIAONING BRILLIANT METALLURGY TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |