CN102041339A - Equipment and method for transferring thermal state directly reduced metal product - Google Patents
Equipment and method for transferring thermal state directly reduced metal product Download PDFInfo
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- CN102041339A CN102041339A CN 201010614599 CN201010614599A CN102041339A CN 102041339 A CN102041339 A CN 102041339A CN 201010614599 CN201010614599 CN 201010614599 CN 201010614599 A CN201010614599 A CN 201010614599A CN 102041339 A CN102041339 A CN 102041339A
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Abstract
The invention discloses equipment and a method for transferring a thermal state directly reduced metal product. The equipment comprises a distributing device, an insulation material tank and a vertical transportation device, wherein the distributing device is used for receiving the thermal state directly reduced metal product from a direct reduction device and discharging the directly reduced metal product; the insulation material tank is used for accommodating the thermal state directly reduced metal product discharged from the distributing device, and is filled with protective gas while the directly reduced metal product is accommodated in the insulation material tank; and the vertical transportation device is used for vertically transporting the insulation material tank in which the thermal state directly reduced metal product is accommodated.
Description
Technical field
The present invention relates to field, more particularly, relate to the equipment and the method that shift hot direct reducing metal product with the direct-reduction process metal smelting.
Background technology
Direct-reduction process is to be the energy with geseous fuel, liquid fuel or mill coal, reduces the method that obtains metal below the softening temperature at metallic ore or containing metal agglomerate (for example iron ore or iron content agglomerate).Its product is porous low density spongy structure, is called as direct reducing metal or sponge attitude metal, for example, and direct-reduced iron (DRI) or sponge iron.Directly reduction has realized coke-free ironmaking, than low, the CO of blast furnace ironmaking carbon consumption
2Discharging is few, helps saving the energy, protection environment.The sponge iron impurity component is low, is the raw material of smelting the high-quality steel, also can be used as the raw material of blast furnace ironmaking, converter steelmaking, cast iron, iron alloy, powder metallurgy, the displacer of nonferrous metallurgy, the reductor of water treatment etc.
The rotary hearth furnace coal-based direct reduction is to adopt annular rotary hearth furnace to produce a kind of method of direct-reduced iron, and representing technology is Fastmet technology.In this technology, for example, the smart powder of coal dust and iron mixing is in proportion made pelletizing, and dry back is laid in the rotary hearth furnace bed surface with 1～3 layer of ball, along with the rotation of furnace bottom, furnace charge is successively through preheating zone, reduction zone and cooling zone, pelletizing is heated to 1250～1350 ℃ in the reduction zone, because coal dust closely contacts with ferriferous oxide, ferric oxide is reduced into DRI rapidly by carbon, finished product draws off from rotary hearth furnace about 800～1000 ℃ continuously, i.e. metallized product.In whole process, raw material stops 8～30min at furnace bottom, and this depends on property of raw material, bed thickness and other factors.Hot wafering (HBI) can be cooled off or produce to this metallized product.This metallized product also can change electric furnace while hot over to and melt branch, makes slag iron separate, and the liquid iron charging of acquisition is gone into Electric furnace steel making or ingot bar.
Transfer to the process that is used for the molten electric furnace that divides in the metallized product that rotary hearth furnace is drawn off, this metallized product reoxidizes very easily because temperature is high.In addition, be used for the feed location height of the molten electric furnace that divides, therefore having difficulties aspect technology that rotary hearth furnace is connected with electric furnace and the equipment.
Summary of the invention
One object of the present invention is to provide a kind of equipment and method that reduces or prevent the hot direct reducing metal product of transfer that hot direct reducing metal product reoxidizes.
Another object of the present invention is to provide a kind of equipment and method that has overcome because of the hot direct reducing metal product of the transfer of the high difficulty that causes of feed location.
The equipment of the direct reducing metal product that transfer according to the present invention is hot comprises: feeding-distribution device is used for receiving hot direct reducing metal product and discharging this direct reducing metal product from direct reduction unit; The insulation batch can is used to hold the hot direct reducing metal product that feeding-distribution device is discharged, and insulation batch can inside is filled with shielding gas when the insulation batch can holds hot direct reducing metal product; Vertical transferring apparatus is used for vertically transporting the insulation batch can that accommodates hot direct reducing metal product.
At least one discharge port that feeding-distribution device can comprise the opening for feed of the discharge port that is connected to direct reduction unit and discharge hot direct reducing metal product, feeding-distribution device inside can be filled with shielding gas when feeding-distribution device receives and discharges direct reducing metal product.
Feeding-distribution device can comprise a plurality of discharge ports and sequentially or alternately open the shifter of a plurality of discharge ports.
When the insulation batch can held hot direct reducing metal product, the insulation batch can be in sealed state.
This equipment can be used for hot direct reducing metal transferred product to heating unit, and vertical transferring apparatus can be used for the insulation batch can vertically is transported to the predetermined height that is suitable for to the hot direct reducing metal product of described heating unit discharging.
This equipment also can comprise the horizontal conveyer that is used for flatly transporting the insulation batch can.
This equipment can be used for hot direct reducing metal transferred product to heating unit, this equipment also can comprise feed bin, and feed bin can be used for receiving the hot direct reducing metal product of the insulation batch can discharging that is in the predetermined position and discharges this direct reducing metal product to heating unit.
When hot direct reducing metal product was in described feed bin, feed bin inside can be filled with shielding gas.
The method of the direct reducing metal product that transfer according to the present invention is hot comprises: adopt feeding-distribution device to receive hot direct reducing metal product and discharge this direct reducing metal product from direct reduction unit; Adopt the insulation batch can to hold the hot direct reducing metal product that feeding-distribution device is discharged, insulation batch can inside is filled with shielding gas when the insulation batch can holds hot direct reducing metal product; Adopt vertical transferring apparatus vertically to transport the insulation batch can that accommodates hot direct reducing metal product.
At least one discharge port that feeding-distribution device can comprise the opening for feed of the discharge port that is connected to direct reduction unit and discharge hot direct reducing metal product can provide shielding gas to feeding-distribution device inside when feeding-distribution device receives and discharges direct reducing metal product.
Feeding-distribution device can comprise a plurality of discharge ports and sequentially or alternately open the shifter of a plurality of discharge ports.
When the insulation batch can held hot direct reducing metal product, the insulation batch can be in sealed state.
This method can be used for the most hot direct reducing metal transferred product to heating unit, wherein, can adopt vertical transferring apparatus will be incubated batch can and vertically be transported to the predetermined height that is suitable for to the hot direct reducing metal product of described heating unit discharging.
This method also can be included in vertically to transport and accommodate before the insulation batch can of hot direct reducing metal product, adopts horizontal conveyer flatly to transport the insulation batch can.
This method can be used for the most hot direct reducing metal transferred product to heating unit, after the employing vertical transferring apparatus vertically transported the insulation batch can that accommodates hot direct reducing metal product, the employing feed bin received the hot direct reducing metal product of the insulation batch can discharging that is in the predetermined position and discharges this direct reducing metal product to heating unit.
When hot direct reducing metal product is in described feed bin, can charge into shielding gas to described feed bin inside.
Shielding gas can be at least a in rare gas element and the nitrogen.
Description of drawings
By the description of carrying out below in conjunction with accompanying drawing, above-mentioned and other purposes of the present invention and characteristics will become apparent, wherein:
Fig. 1 shifts the equipment of hot direct reducing metal product and the synoptic diagram of method according to an embodiment of the invention.
Embodiment
Describe equipment and the method that shifts hot direct reducing metal product according to an embodiment of the invention in detail below in conjunction with accompanying drawing.
Fig. 1 shifts the equipment of hot direct reducing metal product and the synoptic diagram of method according to an embodiment of the invention.The equipment 100 that shifts hot direct reducing metal product according to an embodiment of the invention is used for the direct reducing metal product hot charging that rotary hearth furnace 200 is made is gone into electric furnace 300, and electric furnace 300 is used for the direct reducing metal product of packing into is melted branch.
With reference to Fig. 1, the equipment 100 that shifts hot direct reducing metal product according to an embodiment of the invention comprises feeding-distribution device 110, insulation batch can 120, horizontal conveyer 130, vertical transferring apparatus 140 and high hopper 150.
Feeding-distribution device 110 is connected to the discharge port of rotary hearth furnace 200, is used to receive and discharge the direct reducing metal product from rotary hearth furnace 200 draws off.With reference to Fig. 1, feeding-distribution device 110 comprises opening for feed 111, first discharge port 112, second discharge port 113 and the sub-material baffle plate 114 that is connected to rotary hearth furnace 200 discharge port (not shown).Sub-material baffle plate 114 is arranged between first discharge port 112 and second discharge port 113, and is used for optionally opening first discharge port 112 and second discharge port 113.When sub-material baffle plate 114 was closed first discharge port 112, the direct reducing metal product that enters feeding-distribution device 110 through opening for feed 111 was discharged through second discharge port 113.When sub-material baffle plate 114 was closed second discharge port 113, the direct reducing metal product that enters feeding-distribution device 110 through opening for feed 111 was discharged through first discharge port 112.In one embodiment, feeding-distribution device 110 is threeway material distributing valves.In the above-described embodiments, feeding-distribution device 110 comprises two discharge ports, but does not invent and be not limited thereto, and for example can comprise a discharge port or more than two discharge port.Comprise at feeding-distribution device 110 and can realize continuous discharging under the situation of a plurality of discharge ports.
Preferably, feeding-distribution device 110 also is provided with shielding gas input aperture (not shown), enters feeding-distribution device 110 inside such as the shielding gas of nitrogen or rare gas element via the shielding gas input aperture.Feeding-distribution device 110 connect material and the process of discharge in, via the shielding gas input aperture to feeding-distribution device 110 inner supply shielding gas.Shielding gas can reduce or prevent reoxidizing of direct reducing metal product.Yet, the invention is not restricted to this, for example feeding-distribution device 110 can not be provided with the shielding gas input aperture, promptly connect material and the process of discharge in to feeding-distribution device 110 supply shielding gas.
Feeding-distribution device 110 can tolerate from the temperature of the direct reducing metal product that rotary hearth furnace 200 draws off.For example, feeding-distribution device 110 can whole be made by resistant to elevated temperatures material, and perhaps the part of the direct reducing metal of the direct contact product of feeding-distribution device 110 is made by resistant to elevated temperatures material.If from the temperature of the direct reducing metal product that rotary hearth furnace 200 draws off is 800～1000 ℃, then feeding-distribution device 110 can be made by whole material by 800～1000 ℃ of tolerances, and perhaps the part of the direct reducing metal of the direct contact product of feeding-distribution device 110 is made by 800～1000 ℃ of materials of tolerance.
Insulation batch can 120 is used to hold the direct reducing metal product of discharging from feeding-distribution device 110.As shown in Figure 1, insulation batch can 120 is arranged on feeding-distribution device 110 belows, and comprises feeding mouth 121, drawing mechanism 122 and suspension ring 123.
Insulation batch can 120 can tolerate from the temperature of the direct reducing metal product of feeding-distribution device 110 discharges and insulation.For example, insulation batch can 120 can whole be made by resistant to elevated temperatures lagging material, and the part that perhaps is incubated the direct reducing metal of the direct contact product of batch can 120 is made by resistant to elevated temperatures lagging material.If the temperature of the direct reducing metal product of discharging from feeding-distribution device 110 is 800～1000 ℃, then being incubated batch can 120 integral body can be made by the material of 800～1000 ℃ of tolerances and insulation, and the part that perhaps is incubated the direct reducing metal of the direct contact product of batch can 120 is made by the material of 800～1000 ℃ of tolerances and insulation.
Insulation batch can 120 also is provided with shielding gas input aperture (not shown), enters insulation batch can 120 inside such as the shielding gas of nitrogen or rare gas element via the shielding gas input aperture.Receive direct reducing metal product from feeding-distribution device 110 and after the shielding gas input aperture charges into shielding gas, closing feeding mouth 121 and shielding gas input aperture, making insulation batch can 120 be in sealed state.The shielding gas that charges into insulation batch can 120 inside can reduce or prevent reoxidizing of direct reducing metal product.
The equipment 100 that shifts hot direct reducing metal product according to an embodiment of the invention also can comprise the high hopper 150 that is arranged on electric furnace 300 tops, and high hopper 150 receives from the direct reducing metal product of insulation batch can 120 discharges that are in the predetermined position and to electric furnace 300 and carries these direct reducing metal products.In one embodiment, the opening for feed of high hopper 150 engages with the drawing mechanism 122 of insulation batch can 120, and drawing mechanism 122 is opened, thereby to the direct reducing metal of high hopper 150 dischargings product.In one embodiment, the discharge port of high hopper 150 is communicated with the opening for feed fluid of electric furnace 300, thereby carries direct reducing metal product to electric furnace 300.Can open the discharge port of high hopper 150 by valve (for example pneumostop valve).
Preferably,, can provide shielding gas, for example at least a in nitrogen and the rare gas element to the inside of high hopper 150 in order to reduce or prevent to discharge the reoxidizing of direct reducing metal product of insulation batch can 120.More preferably, drawing mechanism 122 sealing engagement of high hopper 150 and insulation batch can 120, and provide shielding gas to high hopper 150 inside, thus more effectively reduce or prevent reoxidizing of direct reducing metal product.In addition, high hopper 150 also can be provided with weighing device, thereby can discharge direct reducing metal product quantitatively.
In another embodiment of the equipment 100 of the hot direct reducing metal product of transfer according to the present invention, can omit in horizontal conveyer 130 and the high hopper 150 at least one.Specifically, in the embodiment that omits horizontal conveyer 130, the vertical transferring apparatus 140 of can use can be at least vertically (that is, vertically or vertically and horizontal direction) transportation insulation batch can 120 will be incubated batch can 120 and be transported to preposition.In the embodiment that omits high hopper 150, the drawing mechanism 122 of the insulation batch can 120 that is in the predetermined position directly is communicated with the opening for feed fluid of electric furnace 300, thereby to the direct reducing metal of electric furnace 300 dischargings product.
Insulation batch can 120 inside of the equipment 100 of the direct reducing metal product that transfer according to the present invention is hot are filled with shielding gas; more preferably also provide shielding gas, thereby reduce or prevent reoxidizing of hot direct reducing metal product to feeding-distribution device 110 inside and/or high hopper 150 inside.In addition, vertical transferring apparatus 140 can be transported to the insulation batch can 120 that direct reducing metal product is housed predetermined position (for example predetermined height), thereby has overcome the difficulty that causes because of electric furnace charging position height.
Describe the method that shifts hot direct reducing metal product according to an embodiment of the invention in detail below in conjunction with Fig. 1.
At first, use feeding-distribution device 110 to receive from direct reducing metal product and this direct reducing metal product of discharging that rotary hearth furnace 200 draws off.In one embodiment, by using sub-material baffle plate 114 optionally to open first discharge port 112 and second discharge port 113.When sub-material baffle plate 114 was closed second discharge port 113, the direct reducing metal product that enters feeding-distribution device 110 through opening for feed 111 was discharged through first discharge port 112, thereby enters an insulation batch can 120 and fill this insulation batch can 120.When sub-material baffle plate 114 was closed first discharge port 112, the direct reducing metal product that enters feeding-distribution device 110 through opening for feed 111 was discharged through second discharge port 113, thereby enters another insulation batch can 120 and fill this insulation batch can 120.Therefore, first discharge port 112 and second discharge port 113 are alternately opened, thereby have realized continuous discharging.Preferably, feeding-distribution device 110 connect material and the process of discharge in, via the shielding gas input aperture to feeding-distribution device 110 inner supply shielding gas, thereby reduce or prevent reoxidizing of direct reducing metal product.
In the process of insulation batch can 120 chargings, charge into shielding gas to these insulation batch can 120 inside simultaneously.After charging finishes, can continue to charge into shielding gas for some time.Afterwards, close feeding mouth 121 and shielding gas input aperture, make insulation batch can 120 be in sealed state.
Then, the insulation batch can 120 that usage level conveyer 130 will be equipped with direct reducing metal product is transported to the predetermined position, for example the below of vertical transferring apparatus 140.
Afterwards, the suspension hook 141 of vertical transferring apparatus 140 engages with the suspension ring 123 of insulation batch can 120, makes the horizontal conveyer 130 of insulation batch can 120 disengagings, and vertically (makes progress) and horizontal direction transportation insulation batch can 120.Therefore, insulation batch can 120 is transported to preposition, for example can make the position that engages with the opening for feed of high hopper 150 of drawing mechanism 122 of insulation batch can 120.
Next, the drawing mechanism 122 of insulation batch can 120 is opened, and directly the reducing metal product escapes and enter high hopper 150 from insulation batch can 120.At this moment, the discharge port of high hopper 150 can be opened simultaneously or open with lagging behind with the input of direct reducing metal product, thereby with the hot direct reducing metal product electric furnace 300 of packing into.In addition, can provide shielding gas, to reduce or to prevent reoxidizing of hot direct reducing metal product to high hopper 150 inside.In addition, drawing mechanism 122 sealing engagement of high hopper 150 and insulation batch can 120, and provide shielding gas to high hopper 150 inside, thus more effectively reduce or prevent reoxidizing of direct reducing metal product.
The insulation batch can 120 that discharge finishes can return the starting position of feeding-distribution device 110 belows, thereby receives once more from the direct reducing metal product of feeding-distribution device 110 dischargings.
According to of the present invention direct reducing metal product hot charging is being gone in the method for electric furnace, hot direct reducing metal product is under the atmosphere of shielding gas, thereby reducing or prevent reoxidizing of hot direct reducing metal product.In addition, adopt vertical transferring apparatus the insulation batch can that direct reducing metal product is housed can be transported to predetermined position (for example predetermined height), thereby overcome the difficulty that causes because of electric furnace charging position height.
Though abovely described the equipment and the method for the hot direct reducing metal product of transfer according to the present invention, the invention is not restricted to this in conjunction with rotary hearth furnace.The hot direct reducing metal product that for example, will shift can be the hot direct reducing metal product that direct reduction units such as shaft furnace, pot furnace, fluidized-bed, rotary kiln, tunnel furnace are discharged.
Though abovely described the equipment and the method for the hot direct reducing metal product of transfer according to the present invention, the invention is not restricted to this in conjunction with electric furnace.For example, the equipment that will transfer to of hot direct reducing metal product can be heating units such as flame furnace.
Claims (18)
1. equipment that shifts hot direct reducing metal product, described equipment comprises:
Feeding-distribution device is used for receiving hot direct reducing metal product and discharging this direct reducing metal product from direct reduction unit;
The insulation batch can is used to hold the hot direct reducing metal product that feeding-distribution device is discharged, and insulation batch can inside is filled with shielding gas when the insulation batch can holds hot direct reducing metal product;
Vertical transferring apparatus is used for vertically transporting the insulation batch can that accommodates hot direct reducing metal product.
2. equipment according to claim 1; it is characterized in that; at least one discharge port that feeding-distribution device comprises the opening for feed of the discharge port that is connected to direct reduction unit and discharges hot direct reducing metal product, feeding-distribution device inside is filled with shielding gas when feeding-distribution device receives and discharges direct reducing metal product.
3. equipment according to claim 2 is characterized in that, feeding-distribution device comprises a plurality of described discharge ports and sequentially or alternately opens the shifter of a plurality of discharge ports.
4. equipment according to claim 1 is characterized in that, when the insulation batch can held hot direct reducing metal product, the insulation batch can was in sealed state.
5. equipment according to claim 1, it is characterized in that, described equipment is used for hot direct reducing metal transferred product to heating unit, and described vertical transferring apparatus is used for the insulation batch can vertically is transported to the predetermined height that is suitable for to the hot direct reducing metal product of described heating unit discharging.
6. equipment according to claim 1 is characterized in that, described equipment also comprises the horizontal conveyer that is used for flatly transporting the insulation batch can.
7. equipment according to claim 1, it is characterized in that, described equipment is used for hot direct reducing metal transferred product to heating unit, described equipment also comprises feed bin, and described feed bin is used to receive the hot direct reducing metal product of the insulation batch can discharging that is in the predetermined position and discharges this direct reducing metal product to heating unit.
8. equipment according to claim 7 is characterized in that, when hot direct reducing metal product was in described feed bin, described feed bin inside was filled with shielding gas.
9. according to claim 1,2 or 8 described equipment, it is characterized in that shielding gas is at least a in rare gas element and the nitrogen.
10. method that shifts hot direct reducing metal product, described method comprises:
Adopt feeding-distribution device to receive hot direct reducing metal product and discharge this direct reducing metal product from direct reduction unit;
Adopt the insulation batch can to hold the hot direct reducing metal product that feeding-distribution device is discharged, insulation batch can inside is filled with shielding gas when the insulation batch can holds hot direct reducing metal product;
Adopt vertical transferring apparatus vertically to transport the insulation batch can that accommodates hot direct reducing metal product.
11. method according to claim 10; it is characterized in that; at least one discharge port that feeding-distribution device comprises the opening for feed of the discharge port that is connected to direct reduction unit and discharges hot direct reducing metal product provides shielding gas to feeding-distribution device inside when feeding-distribution device receives and discharges direct reducing metal product.
12. method according to claim 11 is characterized in that, feeding-distribution device comprises a plurality of described discharge ports and sequentially or alternately opens the shifter of a plurality of discharge ports.
13. method according to claim 10 is characterized in that, when the insulation batch can held hot direct reducing metal product, the insulation batch can was in sealed state.
14. method according to claim 10, it is characterized in that, described method is used for the most hot direct reducing metal transferred product to heating unit, wherein, adopt vertical transferring apparatus will be incubated batch can and vertically be transported to the predetermined height that is suitable for to the hot direct reducing metal product of described heating unit discharging.
15. method according to claim 10 is characterized in that, described method also is included in vertically to transport and accommodates before the insulation batch can of hot direct reducing metal product, adopts horizontal conveyer flatly to transport the insulation batch can.
16. method according to claim 10, it is characterized in that, described method is used for the most hot direct reducing metal transferred product to heating unit, after the employing vertical transferring apparatus vertically transported the insulation batch can that accommodates hot direct reducing metal product, the employing feed bin received the hot direct reducing metal product of the insulation batch can discharging that is in the predetermined position and discharges this direct reducing metal product to heating unit.
17. method according to claim 16 is characterized in that, when hot direct reducing metal product is in described feed bin, charges into shielding gas to described feed bin inside.
18., it is characterized in that shielding gas is at least a in rare gas element and the nitrogen according to claim 10,11 or 17 described methods.
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| CN 201010614599 CN102041339A (en) | 2010-12-30 | 2010-12-30 | Equipment and method for transferring thermal state directly reduced metal product |
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| CN 201010614599 CN102041339A (en) | 2010-12-30 | 2010-12-30 | Equipment and method for transferring thermal state directly reduced metal product |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103194560A (en) * | 2012-01-10 | 2013-07-10 | 攀钢集团研究院有限公司 | Transmission method of metallized pellet, sponge iron charging bucket and bunker of electric furnace |
| CN103482265A (en) * | 2013-09-24 | 2014-01-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preventing high-temperature metalized pellets from being oxidized in tank |
| CN103508117A (en) * | 2012-06-28 | 2014-01-15 | 攀钢集团攀枝花钢铁研究院有限公司 | High-temperature metallized pellet material tank |
| CN103831156A (en) * | 2012-12-03 | 2014-06-04 | 洛阳宇航重工机械有限公司 | Specific production device and process method for electrolyte grinding |
| CN107475482A (en) * | 2017-08-21 | 2017-12-15 | 中冶东方工程技术有限公司 | Material processing device for smelting |
| CN110986595A (en) * | 2019-12-11 | 2020-04-10 | 内蒙古鄂尔多斯电力冶金集团股份有限公司 | Automatic electrode paste adding device and method for submerged arc furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103194560A (en) * | 2012-01-10 | 2013-07-10 | 攀钢集团研究院有限公司 | Transmission method of metallized pellet, sponge iron charging bucket and bunker of electric furnace |
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| CN103831156A (en) * | 2012-12-03 | 2014-06-04 | 洛阳宇航重工机械有限公司 | Specific production device and process method for electrolyte grinding |
| CN103482265A (en) * | 2013-09-24 | 2014-01-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preventing high-temperature metalized pellets from being oxidized in tank |
| CN103482265B (en) * | 2013-09-24 | 2015-09-30 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method preventing hot metal pellet to be oxidized in batch can |
| CN107475482A (en) * | 2017-08-21 | 2017-12-15 | 中冶东方工程技术有限公司 | Material processing device for smelting |
| CN110986595A (en) * | 2019-12-11 | 2020-04-10 | 内蒙古鄂尔多斯电力冶金集团股份有限公司 | Automatic electrode paste adding device and method for submerged arc furnace |
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Address after: 617000, No. 28, Panzhihua Avenue, Sichuan, Panzhihua, China Applicant after: Pan'gang Group Engineering Technology Co., Ltd. Co-applicant after: Pangang Group Steel Vanadium & Titanium Co., Ltd. Co-applicant after: Design & Research Inst Co., Ltd., Panzhihua Steel & Iron Group Co-applicant after: Pangang Group Institute Co., Ltd. Address before: 617000 No. 28, East Panzhihua Road, Sichuan, Panzhihua Applicant before: Pangang Group Metallugical Engineering Technology Co., Ltd. Co-applicant before: Pangang Group Steel Vanadium & Titanium Co., Ltd. Co-applicant before: Design & Research Inst Co., Ltd., Panzhihua Steel & Iron Group Co-applicant before: Pangang Group Institute Co., Ltd. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: PANGANG GROUP METALLUGICAL ENGINEERING TECHNOLOGY CO., LTD. TO: PAN GANG GROUP ENGINEERING TECHNOLOGY CO., LTD. |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110504 |