CN210656994U - Device for directly preparing reduced sponge iron from pellet ore - Google Patents
Device for directly preparing reduced sponge iron from pellet ore Download PDFInfo
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- CN210656994U CN210656994U CN201921933387.0U CN201921933387U CN210656994U CN 210656994 U CN210656994 U CN 210656994U CN 201921933387 U CN201921933387 U CN 201921933387U CN 210656994 U CN210656994 U CN 210656994U
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Abstract
The utility model belongs to the technical field of pellet equipment, especially, relate to a device of pellet direct preparation reduction sponge iron, its characterized in that includes the reaction shaft furnace, the feeding storehouse, the commodity circulation transport mechanism who is connected with this feeding storehouse, the setting is at the inside exhaust duct section that just is located the top of reaction shaft furnace, be located the top of a furnace gas outlet duct of this exhaust duct section to the exhaust duct section is the centre of a circle, and sets up at the inside fan-shaped rotatory feed mechanism of reaction shaft furnace, sets up the play feed bin in reaction shaft furnace bottom, sets up on the reaction shaft furnace lateral wall and be located the annular inlet structure of calcination section, set up go out the feed bin with reaction shaft furnace between inlet port II. The utility model discloses accomplish drying, calcination, reduction and the cooling of pellet in a jar, reduced original pellet preparation reduced iron in-process drying, calcination, cooling, reheat reduction to the redundant troublesome operation of refrigerated unnecessary, removed the unnecessary equipment in the production process.
Description
Technical Field
The utility model belongs to the technical field of pellet equipment, especially, relate to a device of pellet direct preparation reduction sponge iron.
Background
The reduced sponge iron is a high-quality steel-making pure iron raw material compared with scrap steel, can effectively reduce impurity elements in finished steel, and provides an important raw material for high-end equipment manufacturing enterprises to produce casting blank pieces of important products.
At present, most of the existing sponge iron reduction methods are that pellets of iron ore can enter a reduction furnace for reduction to prepare reduced sponge iron after being dried, roasted and cooled externally, the external drying, roasting and cooling are respectively carried out on three different devices, the drying is carried out on a chain grate machine, the roasting is completed in the rotation, and then the drying is carried out on a circular cooler.
Disclosure of Invention
The utility model aims at providing a device of pellet direct preparation reduction sponge iron directly puts into the shaft furnace with the pellet and carries out drying, calcination, reduction, cooling, and the production facility that has significantly reduced has shortened production cycle, has saved energy resource consumption.
The purpose of the utility model is realized by the following technical scheme:
the utility model discloses a device for directly preparing reduced sponge iron from pellet ore, which is characterized by comprising a reaction shaft furnace with a drying section, a roasting section, a reducing section and a cooling section, a feeding bin arranged at the top furnace top cover of the reaction shaft furnace, a logistics conveying mechanism connected with the feeding bin, an exhaust pipe section arranged inside the reaction shaft furnace and positioned at the top, a top gas outlet pipe arranged in the exhaust pipe section, a fan-shaped rotary feeding mechanism arranged inside the reaction shaft furnace and with the exhaust pipe section as a rotary circle center, a driving motor connected with the fan-shaped rotary feeding mechanism, a discharging bin arranged at the bottom of the reaction shaft furnace, an annular gas inlet structure arranged on the side wall of the reaction shaft furnace and positioned at the roasting section, and a gas inlet II arranged between the discharging bin and the reaction shaft furnace,
the fan-shaped rotary feeding mechanism comprises a first-stage fan-shaped rotary bin, a second-stage fan-shaped fixed bin and a fan-shaped bin baffle plate,
the furnace top gas outlet pipe penetrates through the furnace top cover to be communicated with the outside of the reaction shaft furnace, and the sector rotary feeding mechanism is connected with the feeding bin.
And a feeding bin valve is arranged at the feeding bin.
The annular air inlet structure is provided with a cage-shaped air inlet I.
The upper part of the discharging bin is provided with an upper valve, and the lower part of the discharging bin is provided with a lower valve.
And a plurality of vent holes are formed in the top end of the exhaust pipe section.
The inner wall of the furnace body of the reaction shaft furnace and the outer wall of the exhaust pipe section are of refractory brick structures.
The utility model has the advantages that:
(1) the utility model discloses a device for directly preparing reduced sponge iron from pellets, which completes the drying, roasting, reducing and cooling of pellets in one tank, reduces unnecessary redundant troublesome operations of drying, roasting, cooling, reheating and reducing to cooling in the original process of preparing reduced iron from pellets, and removes redundant equipment in the production process;
(2) the device for directly preparing the reduced sponge iron by the pellets adopts the waste heat of the pellet reduced iron in the cooling section to heat the reducing gas, and the reducing gas can also be used as the protective gas of the reduced iron to protect the reduced iron from being oxidized, thereby saving the energy consumption for heating the reducing gas, reducing the trouble of independently introducing the protective gas in the cooling process and saving the material consumption;
(3) the device for directly preparing the reduced sponge iron from the pellet ore of the utility model has the advantages that combustible gas at the roasting section simultaneously flows into the shaft furnace from the peripheral furnace wall through the cage-shaped vent holes, the gas is uniformly distributed and is fully combusted, and the phenomena of partial heating and incomplete roasting of the pellet ore in other shaft furnaces are avoided;
(4) the utility model discloses a device of pellet direct preparation reduction sponge iron, the thermal abundant giving off of high temperature furnace roof gas in the shaft furnace has been guaranteed to the roof gas exhaust structure of convolution formula, and has guaranteed appropriate furnace internal pressure, has also practiced thrift the energy.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the structure of the furnace top gas discharge of the present invention.
Fig. 3 is a schematic structural view of the fan-shaped rotary feeding mechanism of the present invention.
Fig. 4 is the schematic structural diagram of the material conveying mechanism of the present invention.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings.
As shown in FIGS. 1-4, the device for directly preparing reduced sponge iron from pellet ore of the present invention comprises a reaction shaft furnace 2 having a drying section, a roasting section, a reduction section and a cooling section, a feeding bin 6 disposed at the top of the reaction shaft furnace 2 and at the top of the furnace top cover 4, a material flow conveying mechanism 12 connected to the feeding bin 6, an exhaust pipe section 14 disposed at the top of the reaction shaft furnace 2, a top gas outlet pipe 5 disposed in the exhaust pipe section 14, a fan-shaped rotary feeding mechanism 7 disposed inside the reaction shaft furnace 2 and having the exhaust pipe section 14 as the center of rotation, a driving motor 9 connected to the fan-shaped rotary feeding mechanism 7, a discharging bin 1 disposed at the bottom of the reaction shaft furnace 2, an annular gas inlet structure 3 disposed on the sidewall of the reaction shaft furnace 2 and at the roasting section, and a gas inlet II 17 disposed between the discharging bin 1 and the reaction shaft furnace 2,
the sector rotary feeding mechanism 7 comprises a first-stage sector rotary bin 10, a second-stage sector fixed bin 11 and a sector bin baffle 13,
the furnace top gas outlet pipe 5 penetrates through the furnace top cover 4 to be communicated with the outside of the reaction shaft furnace 2, and the fan-shaped rotary feeding mechanism 7 is connected with the feeding bin 6.
And a feeding bin valve 8 is arranged at the feeding bin 6.
The annular air inlet structure 3 is provided with a cage-shaped air inlet I18.
An upper valve 15 is arranged at the upper part of the discharging bin 1, and a lower valve 16 is arranged at the lower part of the discharging bin 1.
A plurality of vent holes 19 are arranged at the top end of the exhaust pipe section 14.
The inner wall of the furnace body of the reaction shaft furnace 2 and the outer wall of the exhaust pipe section are of refractory brick structures.
This will be described in detail with reference to fig. 1, 2, 3 and 4. Firstly, the pellet ore is stably sent to the feeding bin 6 by the material conveying mechanism 12 in fig. 4, the gate 8 of the feeding bin is opened, the pellet ore in the bin 6 enters the next layer of fan-shaped rotary feeding mechanism 7, the gate 8 of the feeding bin is closed, the driving motor 9 is opened to drive the fan-shaped rotary feeding mechanism 7 to rotate, the fan-shaped rotary feeding mechanism 7 comprises a first-stage fan-shaped rotary bin 10, a second-stage fan-shaped fixed bin 11 and a fan-shaped bin baffle 13, and after the first-stage fan-shaped rotary bin 10 rotates for a circle under the driving of the driving motor 9, all small hoppers are all rotatedAfter filling up, the stall, when waiting for the pellet material in the reaction shaft furnace 2 to fall to the take the altitude, open fan-shaped storehouse baffle 13, make the material through the cushioning effect of second grade fan-shaped fixed storehouse 11 after, enter into the reaction shaft furnace 2 and dry, after dry, when the below material reduces, under the action of gravity, dry pellet slowly slips off and carries out the high temperature calcination to the calcination section, along with the material reduction of below, the pellet that the calcination was accomplished slips off gradually to the reduction section, at reduction section and the gaseous CO of high temperature reduction and H2Reaction, the preparation of reduction sponge iron succeeds, then along with the material of below reduces, slide gradually to the cooling zone, the cooling is given the heating of reducing gas simultaneously, finally get into 1 play feed bin through the upper portion valve 15 of feed bin 1 upper end, when the material in the feed bin 1 was filled up, close the upper portion valve 15 of upper end, open the lower part valve 16 of lower extreme, the reduction sponge iron who will prepare is discharged reaction shaft furnace 2, when the reduction sponge iron in the feed bin 1 was put, close the lower part valve 16 of lower extreme, open the upper portion valve 15 of upper end, the blowing again.
Reducing gases CO and H2 enter the reaction shaft furnace 2 from an air inlet II 17 on an upper valve 15 at the upper end of the discharge bin 1, the high-temperature reducing sponge iron is heated in a cooling section and is protected from being oxidized, the high-temperature reducing gases after heating treatment are fully reacted with pellet ores in a reducing section and then rise to a roasting section, and the high-temperature reducing gases and the combustion gases CO and H introduced into the roasting section2Mixing and fully burning, introducing combustion gases CO and H into the roasting section2The mixed gas enters the annular air flue from the annular gas inlet structure 3 of the mixed gas of CO and H2, then enters the reaction shaft furnace 2 from the gas inlet hole shown in figure 1 to be fully combusted, the pellet ore is fully heated and then rises to the top of the furnace, the high-temperature top gas enters the rotary air flue through the vent hole 19 shown in figure 2, and finally is conveyed to the purification treatment equipment through the top gas outlet pipe 5 to be purified.
The discharging bin 1 in fig. 1 is composed of an upper discharging valve and a lower discharging valve, namely an upper valve 15 and a lower valve 16, wherein a cooling section belongs to a part of a furnace body at the lowest part of the equipment and is positioned at the lowest part of the furnace body, the cooling section can rapidly cool high-temperature direct reduced iron by adopting a water cooling mode, and circulating cooling water is introduced into the furnace body of the cooling section. The upper part is the furnace body part of the reaction shaft furnace 2, the whole outer wall is formed by welding seamless steel pipes, the furnace is always in a high-temperature state, in order to prevent the high-temperature state in the furnace from influencing the structural strength of a steel structure and the seamless steel pipes, the inner wall of the furnace body of the reaction shaft furnace and the outer wall of an exhaust pipe section are formed by stacking refractory bricks and other materials, a space formed by refractory materials is formed in the whole furnace body, the top first-stage fan-shaped rotating bin 10, the second-stage fan-shaped fixed bin 11 and the fan-shaped bin baffle 13 are all formed by welding steel plates, and because the pellets on the top are newly put into the furnace, the temperature in the furnace can be absorbed by the put pellets, the temperature is not too high, and the. The second-stage fan-shaped fixed bin 11 is positioned inside the furnace body and positioned at the top and fixed on the furnace body in a welding mode, the middle of the second-stage fan-shaped fixed bin is connected with the exhaust pipe section 14 and used for fixing the structure, the first-stage fan-shaped rotary bin 10 is connected with a rotary body on the upper portion of the furnace body and driven by the driving motor 9 to rotate around the exhaust pipe section 14, after falling pellets fill each hopper bin in sequence, the first-stage fan-shaped rotary bin stops rotating, when the pellets in the furnace fall to a proper position, the fan-shaped bin baffle 13 is opened to enable the pellets to be put into the furnace to wait for roasting and reduction, the driving motor 9 is started again to drive the second-stage fan-shaped fixed bin 11 to rotate and fill materials, and meanwhile, the material conveying mechanism 12.
The utility model discloses a device for directly preparing reduced sponge iron from pellets, which completes the drying, roasting, reducing and cooling of pellets in one tank, reduces unnecessary redundant troublesome operations of drying, roasting, cooling, reheating and reducing to cooling in the original process of preparing reduced iron from pellets, and removes redundant equipment in the production process; the waste heat of the pellet reduced iron in the cooling section is adopted to heat the reducing gas, and the reducing gas can also be used as the protective gas of the reduced iron to protect the reduced iron from being oxidized, so that the energy consumption for heating the reducing gas is saved, the trouble of independently introducing the protective gas in the cooling process is reduced, and the material consumption is saved; the device for directly preparing the reduced sponge iron by the pellet ore of the utility model has the advantages that the combustible gas at the roasting section simultaneously flows into the reaction shaft furnace 2 from the surrounding furnace wall through the cage-shaped air inlet holes I18, the gas is uniformly distributed and is fully combusted, and the phenomena of partial heating and incomplete roasting of the pellet ore in other shaft furnaces are avoided; the rotary top gas exhaust structure ensures the sufficient dissipation of the heat of the high-temperature top gas in the reaction shaft furnace 2, ensures the proper pressure in the furnace and saves the energy.
Claims (6)
1. A device for directly preparing reduced sponge iron from pellet ore is characterized by comprising a reaction shaft furnace with a drying section, a roasting section, a reduction section and a cooling section, a feeding bin arranged at the top of the reaction shaft furnace, a logistics conveying mechanism connected with the feeding bin, an exhaust pipe section arranged inside the reaction shaft furnace and positioned at the top, a top gas outlet pipe arranged in the exhaust pipe section, a fan-shaped rotary feeding mechanism taking the exhaust pipe section as a rotary circle center and arranged inside the reaction shaft furnace, a driving motor connected with the fan-shaped rotary feeding mechanism, a discharging bin arranged at the bottom of the reaction shaft furnace, an annular gas inlet structure arranged on the side wall of the reaction shaft furnace and positioned at the roasting section, and a gas inlet hole II arranged between the discharging bin and the reaction shaft furnace,
the fan-shaped rotary feeding mechanism comprises a first-stage fan-shaped rotary bin, a second-stage fan-shaped fixed bin and a fan-shaped bin baffle plate,
the furnace top gas outlet pipe penetrates through the furnace top cover to be communicated with the outside of the reaction shaft furnace, and the sector rotary feeding mechanism is connected with the feeding bin.
2. The apparatus for directly preparing reduced sponge iron from pellets as claimed in claim 1, wherein the feeding bin is provided with a valve.
3. The apparatus for directly preparing reduced sponge iron from pellets as claimed in claim 1, wherein said annular air inlet structure is provided with cage-shaped air inlets I.
4. The apparatus for directly preparing reduced sponge iron from pellets according to claim 1, wherein an upper valve is provided at an upper portion of the discharging bin, and a lower valve is provided at a lower portion of the discharging bin.
5. The apparatus for directly preparing reduced sponge iron from pellets as claimed in claim 1, wherein a plurality of vent holes are formed at the top end of the exhaust duct section.
6. The apparatus for directly preparing reduced sponge iron from pellets as claimed in claim 1, wherein the inner wall of the reaction shaft furnace and the outer wall of the exhaust duct section are of refractory brick structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921933387.0U CN210656994U (en) | 2019-11-11 | 2019-11-11 | Device for directly preparing reduced sponge iron from pellet ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921933387.0U CN210656994U (en) | 2019-11-11 | 2019-11-11 | Device for directly preparing reduced sponge iron from pellet ore |
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| CN210656994U true CN210656994U (en) | 2020-06-02 |
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| CN201921933387.0U Active CN210656994U (en) | 2019-11-11 | 2019-11-11 | Device for directly preparing reduced sponge iron from pellet ore |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110669893A (en) * | 2019-11-11 | 2020-01-10 | 辽宁科技大学 | Device for directly preparing reduced sponge iron from pellet ore |
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2019
- 2019-11-11 CN CN201921933387.0U patent/CN210656994U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110669893A (en) * | 2019-11-11 | 2020-01-10 | 辽宁科技大学 | Device for directly preparing reduced sponge iron from pellet ore |
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