CN201043182Y - Electrical heated equipment for direct reduction of sponge iron - Google Patents
Electrical heated equipment for direct reduction of sponge iron Download PDFInfo
- Publication number
- CN201043182Y CN201043182Y CNU2007201015442U CN200720101544U CN201043182Y CN 201043182 Y CN201043182 Y CN 201043182Y CN U2007201015442 U CNU2007201015442 U CN U2007201015442U CN 200720101544 U CN200720101544 U CN 200720101544U CN 201043182 Y CN201043182 Y CN 201043182Y
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- China
- Prior art keywords
- gas
- retort
- furnace
- sponge iron
- heater
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- Expired - Fee Related
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Abstract
The utility model discloses a reduction equipment of sponge iron, which concretely refers to electric heating direct reduction sponge iron equipment. The utility model contains a furnace, inside of which is provided with a heat resisting insulation layer, a hopper, which is located on the upper part of the furnace, a feed part, which is communicated with the hopper and a discharging device on the lower part of the furnace. A thin furnace pot made of a heat resisting material is arranged inside the furnace. A heating element and a temperature controlling element are arranged on the external surface in different sections. Cooling water jackets are arranged on the lower part of the furnace and the outer face of the furnace pot. A gas recovery chamber is arranged on the upper part of the furnace. A circulating gas inlet is arranged on the furnace pot wall which is on the discharging device on the bottom of the furnace pot. A gas handling arrangement, which can transfer CO into CO2, is connected between the circulating inlet and outlet of the gas recovery chamber through a pipe. The utility model can produce sponge iron by directly putting the raw materials into furnace to reduce after the coal dust and the fine iron ore are directly mixed together, can precisely control the temperature, and can improve reduction efficiency and output.
Description
Technical field
The utility model relates to a kind of equipment of reducing sponge iron, especially relates to the equipment of the direct reducing sponge iron of a kind of electrically heated.
Background technology
Sponge iron is to utilize refined iron mine powder and reductive agent reaction, the fe that direct reduction forms under the temperature that is lower than the iron fusing point, and therefore its shape is sponge iron like sponge.Sponge iron has vital role in Steel industry, be to smelt smart steel, the necessary starting material of special steel, but the output of China seldom, and it mainly is to obtain by import that China smelts the sponge iron that smart steel uses.In the world, since last century the eighties sponge iron enter large-scale production, at present production method is divided into gas base method and coal-based method by the type of reductive agent; Account for 93% with what gas base method was produced in the world, account for 7% with what coal-based method was produced.It is the cycle production unit of crucible type that coal-based method is produced used equipment major part.It is to put into crucible after coal dust and refined iron mine powder are mixed by a certain percentage, then crucible is put into the stove of low temperature rotary kiln or other periodic earlier, heating an end under this temperature after the time, change over to again in the stove warm in the another one and heat, and then change the another one High-temp. kiln over to; The temperature difference of each stove, the mixture in the crucible is heated up by zone heating by basic, normal, high three different temperature, and in the different temperature stages, the coal decomposes produces reducing mediums such as CO, H, with Fe
2O
3Reduction reaction takes place, with Fe
2O
3Be reduced into fe.This equipment and method are traditional technology, and its shortcoming is that equipment is huge, and heaviness takies very large-area soil; Labour intensity is very big, seriously polluted to environment.
Chinese patent CN1080961 also discloses a kind of method and apparatus of reducing spongy iron in coal-base shaft furnace, and this equipment comprises feeding device, perpendicular body of heater, grate plate and drawing mechanism four parts of putting.Its whole body of heater is divided into preheating, reduction and cooling three phases, and reinforced on top, in the bottom discharging, what its material was used is group's ball of coal and refined iron mine powder, and reduction process is to discharge CO and H by burning of coal, with Fe
3O
4Be reduced into fe.The used material of this equipment is group's ball of coal and refined iron mine powder, and the pelletizing granularity can not be too big, can not be too little, and making raw material needs certain cost; The heat that needs when refined iron mine powder is reduced comes from burning of coal, and the burning of coal temperature is difficult to control, and the quality of sponge iron is affected.
The utility model content
The utility model technical issues that need to address provide the equipment of reducing sponge iron a kind of accurately control reaction temperature, that production efficiency is high.
For solving the problems of the technologies described above, the technical scheme that the utility model adopted is:
The equipment of the direct reducing sponge iron of electrically heated, comprise that inside is provided with the body of heater of heat-resisting thermal insulation layer, is positioned at the loading hopper of body of heater upper end and the feed mechanism that is communicated with loading hopper, the drawing mechanism of body of heater bottom, an elongated heat-resistant tube is set in the body of heater, as retort, the retort outside is provided with electrical heating element and temp-controlling element, their segmentations are provided with, and the outside of the retort of body of heater bottom is provided with watercooling jacket.
Further concrete structure of the present utility model is: the electrical heating element of retort outside and temp-controlling element segmentation are provided with, and it from up to down is divided into three sections of cold zone, middle warm area and high-temperature zones; The top of body of heater is provided with the gas recovery chamber, and the gas recovery chamber is communicated with retort, and top, gas recovery chamber is provided with venting port; Loading hopper is arranged on the top of body of heater, is communicated with by the continuous material of normal temperature district between loading hopper and the retort, and the continuous material of normal temperature distinguishes that to be placed through gas recovery indoor; Retort wall above the drawing mechanism of retort bottom is provided with the circulation gas import, by pipe connection gas treatment equipment is arranged between the venting port of circulation gas import and gas recovery chamber.In retort, produce, do not have the CO gas accumulation that reacted indoor, then by venting port, make CO become CO through pipeline and gas treatment equipment to gas recovery
2, enter again in the cooling zone of retort, the material that enters the cooling zone is cooled off, prevent that simultaneously the material that enters the cooling zone from making sponge iron generation oxidation owing to the temperature of reaction reduction can not produce reducing gas.
The setting of the concrete equipment of the gas treatment equipment of technique scheme is: it comprises CO gas wash tower, coal tar oil suction pump, circulation gas heat pump; Its concrete mode of connection is, the CO gas wash tower is communicated with the gas recovery chamber, between the bottom of this CO gas wash tower and venting port, be provided with the coal tar oil suction pump, a CO gas compressor be set in the outlet side of CO gas wash tower, so that unnecessary CO is reclaimed so that utilize again; On the pipeline of the circulation gas import of leading to retort bottom of CO gas wash tower outlet side, set gradually a coal tar oil suction pump, a circulation gas heating unit and a CO again
2Gas wash tower, the circulation gas heating unit changes CO into CO
2, arrive the circulation gas import by pipe-line transportation then; At CO
2The outlet side of gas wash tower also is provided with a CO
2Discharge outlet.
Further improvement of the utility model is: be provided with helical baffle between watercooling jacket and retort, the water-in of watercooling jacket is arranged on the bottom, and water outlet is arranged on top.
The further concrete structure of feed mechanism of the present utility model is: it comprises blending bunker and e Foerderanlage, and blending bunker comprises the refined iron mine powder storehouse, goes back run coal bin and returns coal bunker; Through coal and the material of the first time after furnace reduction is used, process is arranged at the crusher in crushing at the discharge port place of drawing mechanism, after sponge iron is selected in the magnetic separator selection, again through reciprocating sieve can with coal dust send back to once more after separating and return coal bunker, with refined iron mine powder with go back raw coal and mixes, participation use again; Return coal bunker and the screening coal dust reciprocating sieve between be provided with the coal dust e Foerderanlage.
The concrete structure of drawing mechanism of the present utility model is a stepped start-stop system screw discharging machine.
Adopt the beneficial effect that technique scheme produced to be:
The utility model can utilize coal dust and the direct mixed raw material of refined iron mine powder to reduce directly into stove, and produces sponge iron.The utility model adopts the electrical heating element heating, therefore can accurately control the temperature of reaction of coal and refined iron mine powder; Because retort of the present utility model is very thin, adopt zone heating control again, can make coal in time produce different reducing gass easily with the complete heat penetration of the mixture of coal and refined iron mine powder in the different temperature stages, with refined iron mine powder reduction in time and fully, obtain maximum sponge iron.After the heating arrangement of sectional type rationally was provided with different length, the stepped start-stop system screw discharging machine can make the mobile quickening of material between each heating interval, not only can guarantee refined iron mine powder fully is reduced into sponge iron, and can improve reduction efficiency, improved output.
The setting of device such as gas recovery of the present utility model chamber and gas wash tower can be carried out unnecessary CO gas in the reduction reaction recycling, has also reduced the pollution of discharging CO gas to environment on the other hand; CO gas process coal tar oil suction pump is after the circulation gas heating unit changes it into CO
2Gas, CO
2Through CO
2After the gas wash tower, enter the bottom of retort, can not only the material that enter the retort cooling zone be cooled off, and can the sponge iron in the cooling zone be played a protective role, prevent that it from contacting with air and oxidation takes place once more.
The watercooling jacket that bottom of furnace body is provided with mainly cools off the material in the retort, makes the material can be by the rapid lower temperature of refrigerative, and oxidation no longer takes place; Its water coolant can be heated into steam by the pyritous retort on the top of watercooling jacket, and these steam also can utilize again.The setting of the helical baffle in the water jacket can fully contact water with retort, increased cooling performance.
Owing to the utility model is to utilize to react between coal dust and the refined iron mine powder to generate the simple substance sponge iron, therefore do not need material is made pelletizing, through the magnetic separation of nonrecoverable coal process, screening, with coal with after sponge iron separates, can also get back to blending bunker once more directly uses, therefore save cost, reduced raw-material waste.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Wherein: 1, loading hopper, 2, the gas recovery chamber, 3, body of heater, 4, cold zone, 5, electrical heating element, 6, middle warm area, 7, the high-temperature zone, 8, watercooling jacket, 9, water-in, 10, the material loading pipeline, 11, blending bunker, 12, reciprocating sieve, 13, venting port, 14, the continuous material of normal temperature district, 15, the CO gas wash tower, 16, the coal tar oil suction pump, 17, gas compressor, 18, the circulation gas heating unit, 19, CO
2Discharge outlet, 20, retort, 21, water outlet, 22, the cooling zone, 23, the circulation gas import, 24, the stepping screw discharging machine, 25, crusher, 26, magnetic separator, 27, helical baffle, 28, CO
2Gas wash tower.
Embodiment
Below in conjunction with accompanying drawing the utility model is done and to be described in further detail:
The utility model comprises body of heater 3, be positioned at the loading hopper 1 of body of heater 3 upper ends and the feed mechanism that is communicated with loading hopper 1, the drawing mechanism of body of heater 3 bottoms, drawing mechanism is a stepping screw discharging machine 24, the inside of body of heater 3 is provided with thermal insulation layer and refractory layer, the refractory layer the inside of body of heater is provided with an elongated heat-resistant tube, this heat-resistant tube is promptly as the retort 20 for reducing sponge iron, retort 20 outside segmentations are provided with electrical heating element 5 and temp-controlling element, and the outside of the retort 20 of body of heater 3 bottoms is provided with watercooling jacket 8.
The electrical heating element 5 of retort 20 outsides and temp-controlling element segmentation are provided with, and it from up to down is divided into 7 three sections of cold zone 4, middle warm area 6 and high-temperature zones, the cooling zone 22 that watercooling jacket 8 places form be positioned at high-temperature zone 7 below; The top of body of heater 3 is provided with gas recovery chamber 2, and gas recovery chamber 2 is communicated with retort 20, and 2 tops, gas recovery chamber are provided with venting port 13; Loading hopper 1 is arranged on the upper end of body of heater 3, is communicated with by the continuous material of normal temperature district 14 between loading hopper 1 and the retort 20, and the continuous material of normal temperature is distinguished 14 and is placed through in the gas recovery chamber 2; The top retort wall of retort 20 bottoms, stepping screw discharging machine 24 is provided with circulation gas import 23, venting port 13 in gas recovery chamber 2 is communicated with a CO gas wash tower 15 by pipeline, be provided with coal tar oil suction pump 16 in the bottom of this CO gas wash tower 15, this coal tar oil suction pump is connected between the bottom of the venting port 13 of gas recovery chamber 2 and CO gas wash tower 15; One gas compressor 17 is set in the outlet side of above-mentioned CO gas wash tower 15, and gas compressor 17 reclaims unnecessary CO so that utilize again; On the pipeline of the threeway of above-mentioned CO gas wash tower 15 outlet sides, set gradually a coal tar oil suction pump 16, a circulation gas heating unit 18 and a CO again
2 Gas wash tower 28, circulation gas heating unit 18 change CO into CO
2, arrive retort 20 bottom cycle gas imports 23 places by pipe-line transportation then, make CO
2Enter the cooling zone of retort, unnecessary CO
2From CO
2The CO of the outlet side of gas wash tower 28
2 Discharge outlet 19 is discharged or is recycled.
It is indoor that the CO gas that not having of producing in retort reacted gathers gas recovery, enters CO gas wash tower 15 and coal tar oil suction pump 16 by venting port then, handles a clean back part and discharged by gas compressor 17, with recycling; CO is again through coal tar oil suction pump 16, circulation gas heating unit 18 and CO for a part
2 Gas wash tower 28 becomes CO
2And handle totally CO
2The part of gas is cooled off the material that enters the cooling zone in pipeline enters retort, prevents that simultaneously the material that enters the cooling zone from can not produce reducing gas and oxidized because temperature of reaction reduces, and another unnecessary part then can be through CO
2Discharge outlet 19 is discharged.
Be provided with helical baffle 27 between watercooling jacket 8 and retort, the water-in 9 of watercooling jacket 8 is arranged on the bottom of watercooling jacket 8, and water outlet 21 is arranged on watercooling jacket 8 tops.
Below stepping screw discharging machine 24, the discharge port place of retort is provided with a crusher 25, be provided with magnetic separator 26 below the discharge port of crusher 25, magnetic separator 26 separates sponge iron with the exhausted coal dust, coal dust enters reciprocating sieve 12, through reciprocating sieve 12 garbled coal dusts in e Foerderanlage is delivered to blending bunker 11, blending bunker 11 comprises the refined iron mine powder storehouse, goes back run coal bin and returns coal bunker, returns coal bunker and is used for depositing above-mentioned used coal.Through the coal after furnace reduction is used for the first time and refined iron mine powder with go back raw coal and directly mix in proportion, deliver in the loading hopper 1 by material loading pipeline 10 again through mixed material.Material from up to down moves, from loading hopper 1 successively downwards through the continuous material of normal temperature district 14, cold zone 4, warm area 6, high-temperature zone 7, cooling zone 22, form one and progressively heat, take place reduction reaction, refrigerative working cycle, make refined iron mine powder be reduced into sponge iron.
Claims (5)
1. the direct reducing sponge iron equipment of electrically heated, comprise that inside is provided with the body of heater of heat-resisting thermal insulation layer, is positioned at the loading hopper of body of heater upper end and the feed mechanism that is communicated with loading hopper, the drawing mechanism of body of heater bottom, it is characterized in that: the elongated retort that a heat-stable material is made is set in the body of heater, retort outside segmentation is provided with electrical heating element and temp-controlling element, and the bottom of body of heater, the outside of retort are provided with watercooling jacket.
2. the direct reducing sponge iron equipment of electrically heated according to claim 1, the structure that it is characterized in that the electrical heating element segmentation setting of described retort outside from up to down are divided into three sections of cold zone, middle warm area and high-temperature zones; The top of body of heater is provided with the gas recovery chamber that is communicated with retort, and top, gas recovery chamber is provided with venting port; Loading hopper is arranged on the top of body of heater, is communicated with by being placed through the continuous material of the indoor normal temperature of gas recovery district between loading hopper and the retort; The retort wall on the drawing mechanism top of retort bottom is provided with the circulation gas import, has by pipe connection CO is changed CO between the venting port of circulation gas import and gas recovery chamber
2Gas treatment equipment.
3. the direct reducing sponge iron equipment of electrically heated according to claim 2, it is characterized in that described gas treatment equipment comprises CO gas wash tower, coal tar oil suction pump, circulation gas heat pump, its concrete mode of connection is, the CO gas wash tower is communicated with the venting port of gas recovery chamber, between the venting port at the bottom of this CO gas wash tower and top, gas recovery chamber, be provided with the coal tar oil suction pump, lead in the outlet side of CO gas wash tower on the pipeline of circulation gas import and set gradually a coal tar oil suction pump again, CO is transformed into CO
2Circulation gas heating unit and CO
2Gas wash tower; Also be provided with the CO gas compressor that unnecessary CO is carried out recycling in the outlet side of CO gas wash tower.
4. the direct reducing sponge iron equipment of electrically heated according to claim 1 is characterized in that being provided with helical baffle between described watercooling jacket inwall and the retort.
5. the direct reducing sponge iron equipment of electrically heated according to claim 1 is characterized in that described feed mechanism comprises blending bunker and e Foerderanlage, and blending bunker comprises the refined iron mine powder storehouse, go back run coal bin and deposit the coal bunker that returns of the coal dust that repeats to utilize again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201015442U CN201043182Y (en) | 2007-06-06 | 2007-06-06 | Electrical heated equipment for direct reduction of sponge iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201015442U CN201043182Y (en) | 2007-06-06 | 2007-06-06 | Electrical heated equipment for direct reduction of sponge iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201043182Y true CN201043182Y (en) | 2008-04-02 |
Family
ID=39258075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201015442U Expired - Fee Related CN201043182Y (en) | 2007-06-06 | 2007-06-06 | Electrical heated equipment for direct reduction of sponge iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201043182Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559978A (en) * | 2012-02-17 | 2012-07-11 | 王东海 | Method for producing sponge iron by electric heating and system thereof |
| CN102899438A (en) * | 2012-10-26 | 2013-01-30 | 贵州新天地设备有限公司 | Reducing furnace used for producing direct reduction iron |
| CN102912061A (en) * | 2012-10-26 | 2013-02-06 | 贵州新天地设备有限公司 | Reduction furnace with inner heating containers for producing direct induction iron |
| CN106244755A (en) * | 2016-08-19 | 2016-12-21 | 环境保护部华南环境科学研究所 | A kind of device for producing sponge iron |
| CN114381564A (en) * | 2021-04-15 | 2022-04-22 | 北京华浦博科技有限公司 | Direct reduction device for heating iron concentrate powder by isolating air and application thereof |
-
2007
- 2007-06-06 CN CNU2007201015442U patent/CN201043182Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559978A (en) * | 2012-02-17 | 2012-07-11 | 王东海 | Method for producing sponge iron by electric heating and system thereof |
| CN102559978B (en) * | 2012-02-17 | 2014-04-09 | 王东海 | Method for producing sponge iron by electric heating and system thereof |
| CN102899438A (en) * | 2012-10-26 | 2013-01-30 | 贵州新天地设备有限公司 | Reducing furnace used for producing direct reduction iron |
| CN102912061A (en) * | 2012-10-26 | 2013-02-06 | 贵州新天地设备有限公司 | Reduction furnace with inner heating containers for producing direct induction iron |
| CN106244755A (en) * | 2016-08-19 | 2016-12-21 | 环境保护部华南环境科学研究所 | A kind of device for producing sponge iron |
| CN106244755B (en) * | 2016-08-19 | 2018-06-08 | 环境保护部华南环境科学研究所 | A kind of device for producing sponge iron |
| CN114381564A (en) * | 2021-04-15 | 2022-04-22 | 北京华浦博科技有限公司 | Direct reduction device for heating iron concentrate powder by isolating air and application thereof |
| CN114381564B (en) * | 2021-04-15 | 2024-04-30 | 北京华浦博科技有限公司 | Direct reduction device for insulating air and heating iron concentrate powder and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080402 Termination date: 20120606 |