CN206624892U - Flash iron-smelting furnace - Google Patents
Flash iron-smelting furnace Download PDFInfo
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- CN206624892U CN206624892U CN201720157815.XU CN201720157815U CN206624892U CN 206624892 U CN206624892 U CN 206624892U CN 201720157815 U CN201720157815 U CN 201720157815U CN 206624892 U CN206624892 U CN 206624892U
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Abstract
The utility model discloses flash iron-smelting furnace, including：Vertical shaft, horizontal chamber furnace (oven) bottom, uptake flue and burnt part is blocked, have to suspend in vertical shaft and smelt chamber, the top of vertical shaft has nozzle；There is melting chamber, formed with molten bath, molten bath has product exit for the bottom of melting chamber, and the top at horizontal chamber furnace (oven) bottom is connected with the lower end of vertical shaft, so that melting chamber smelts chamber with suspending in horizontal chamber furnace (oven) bottom；The lower end of uptake flue is connected with the top at horizontal chamber furnace (oven) bottom and is arranged at intervals with melting chamber, uptake flue with vertical shaft；Burnt part is blocked to be located in horizontal chamber furnace (oven) bottom and set adjacent to vertical shaft, so that molten bath is divided into the second molten bath chamber smelted the first molten bath chamber of chamber with suspension and connected with product exit, blocks burnt part and be suitable to intercept coke in the first molten bath intracavitary and flue gas, clinker and molten iron is entered the second molten bath chamber by it.A ton ferrocoke consumption can be significantly reduced using the flash iron-smelting furnace, realizes energy-saving and emission-reduction.
Description
Technical field
The utility model belongs to metallurgical technology field, specifically, the utility model is related to flash iron-smelting furnace.
Background technology
Existing more than the 200 years history of blast furnace, tremendous contribution is made that for the progress of human society, but blast furnace process it is long,
High energy consumption, poor miscellaneous resource bad adaptability, especially environmental problem are become increasingly conspicuous.In order to which solution resource and environment are asked from source
Topic, countries in the world are provided for a rainy day at the beginning of last century, and the research of " non-blast furnace ironmaking " is organized with act of state, but so far
Fail and substitute blast furnace, it is very big to show that it innovates difficulty.
Flash metallurgy is the ripe advanced technology of coloured industry, and the fundamental difference of it and blast furnace is that Flash Smelting Furnace is fine
" reaction of floating " of grain, therefore with the incomparable chemical kinetics supremacy clause of blast furnace.Iron ore is under afloat, only
Need 3 seconds, you can completing blast furnace needs the chemical reaction process of a few hours.Therefore, flash iron-smelting process is based on " steel-have
Color " subject crossing new thinking, there is short flow, energy-conservation, the obvious advantage of clean manufacturing.
" a kind of flash metallurgical method of iron " (CN201210179226.3) patented technology, the utility model disclose one kind
Flash smelting furnace and ironmaking production method.Wherein, flash smelting furnace includes：Reaction tower, reaction compartment is defined in the reaction tower；
Furnace charge nozzle, the furnace charge nozzle are arranged at the top of reaction tower；Molten bath, the molten bath are arranged on the bottom of reaction tower, for accommodate from
The melt fallen after being reacted in reaction tower space makees follow-up reduction reaction；And flue, the flue pass through molten bath and reaction tower
It is connected, the flue gas discharged for discharging course of reaction.
" utilizing the method for flash iron-smelting furnace ironmaking " (CN201410678066.6) patented technology, the utility model propose
A kind of method smelted iron using flash iron-smelting furnace, key step are included：Reduction tower intracavitary to flash iron-smelting furnace, which sprays into, dries iron
Concentrate, solvent and the fuel for including coke, fine coal and oxygen, and make the reducing atmosphere of reduction tower intracavitary formation high temperature；Make to do
With also Primordial Qi in reduction tower intracavitary redox reaction occurs for dry iron ore concentrate, to obtain molten iron, slag and flue gas, and in molten bath
From top to bottom form coke layer, slag blanket and molten iron layer；Wherein, redox reaction is carried out under 600~1200 degrees Celsius；Also
Carbon monoxide containing 5~80 volume % in originality atmosphere.
Utility model content
The utility model is intended to one of technical problem at least solving in correlation technique to a certain extent.Therefore, this reality
It is to propose a kind of flash iron-smelting furnace with a new purpose, can significantly reduce a ton ferrocoke using the flash iron-smelting furnace disappears
Consumption, realize energy-saving and emission-reduction.
Specifically, the utility model is to find to complete based on following：Current flash ironmaking technology or method are adopted
Coke is that the surface for being laid in horizontal molten bath forms coke layer, and molten iron mixes clinker and oozed through coke layer during production
After carbon, molten bath bottom is flowed to.And because the Area comparison in molten bath is big, the gas CO in product2/H2O and the coke of large area are in height
Temperature is lower to be contacted, and boudouard reaction inevitably occurs, and then significantly increase the loss of coke.In order to reduce coke damage
Consumption, inventor block burnt part by being set in flash iron-smelting furnace, coke layer are limited in horizontal chamber furnace (oven) bottom and the vertical heater of Flash Smelting Furnace
One end that body combines, so as to reduce coke and CO in product gas2/H2O contact area, and then coke loss is significantly reduced, together
When ensure that product gas, molten iron and clinker can be discharged smoothly.
It is new according to this practicality the utility model proposes a kind of flash iron-smelting furnace according to one side of the present utility model
The embodiment of type, the flash iron-smelting furnace include：
Vertical shaft, the vertical shaft is interior to have the smelting chamber that suspends, and the top of the vertical shaft has nozzle；
Horizontal chamber furnace (oven) bottom, has melting chamber in the horizontal chamber furnace (oven) bottom, and the bottom of the melting chamber is described formed with molten bath
Molten bath has product exit, and the top at the horizontal chamber furnace (oven) bottom is connected with the lower end of the vertical shaft, so as to the melting chamber
Chamber is smelted with described suspend；
Uptake flue, the lower end of the uptake flue are connected with the top at the horizontal chamber furnace (oven) bottom and connected with the melting chamber
Logical, the uptake flue is arranged at intervals with the vertical shaft；
Block burnt part, it is described to block that burnt part is located in the horizontal chamber furnace (oven) bottom and the neighbouring vertical shaft is set, described it will melt
Pond is divided into the second molten bath chamber smelted the first molten bath chamber of chamber with the suspension and connected with the product exit, described
Burnt part is blocked to be suitable to intercept coke in first molten bath intracavitary and flue gas, clinker and molten iron is melted into described second by it
Cell cavity.
Thus, burnt part is blocked by setting in the flash iron-smelting furnace of the utility model above-described embodiment, coke is limited in sleeping
Formula furnace bottom is located at immediately below vertical shaft in space.Block burnt part by using above-mentioned and on the one hand can be substantially reduced coke and production
CO in thing gas2/H2O contact area, it on the other hand can effectively ensure that molten iron and clinker pass through and flow to the second molten bath
Chamber, while ensure that product gas passes through the free space for blocking burnt part and arriving at the second molten bath chamber top.By using this reality
Ton ferrocoke can be greatly reduced with the flash iron-smelting furnace of new above-described embodiment to consume, realize energy-saving and emission-reduction.
In addition, there can also be technology additional as follows special according to the flash iron-smelting furnace of the utility model above-described embodiment
Sign：
Described to block burnt part to block burnt net in the utility model, the aperture for blocking burnt net is less than the particle diameter of coke and big
In the particle diameter of the clinker.It is possible thereby to effectively intercept coke, while ensure that molten iron and clinker can pass through.
In the utility model, the aperture for blocking burnt net is 15mm.It is possible thereby to effectively intercept coke.
In the utility model, under the first molten bath chamber interior edge upwardly direction be divided into iron pelagic division, slag blanket area and
Coke layer area, upwardly direction is divided into iron pelagic division and slag blanket area under the second molten bath chamber interior edge, described to block burnt part to block
Burnt plate, it is described to block burnt plate and substantially vertically extend and be fixed in the horizontal chamber furnace (oven) bottom, the upper end for blocking burnt plate and under
End is respectively formed with blow vent and material hole, and the lower end of the blow vent is higher than the coke layer area, the upper end of the material hole
Less than the coke layer area and in the slag blanket area, the lower end of the material hole is located in iron pelagic division.From there through adopting
Blocked burnt plate with above-mentioned and can effectively be intercepted coke.
In the utility model, the blow vent and the material hole are respectively formed as U-shaped hole.It is possible thereby to further carry
High molten iron and clinker pass through efficiency.
In the utility model, the top and bottom for blocking burnt plate are respectively between the upper wall and lower wall at the horizontal chamber furnace (oven) bottom
Separate to form the blow vent and the material hole, it is described to block burnt plate and be fixed on by fixture in the horizontal chamber furnace (oven) bottom.Thus
Burnt plate is blocked by using above-mentioned setting, that molten iron and clinker are improved while can effectively intercepting coke passes through efficiency.
In the utility model, the fixture is vertical fix bar, and the both ends for blocking burnt plate are respectively by solid vertically
Fixed pole is connected with the upper wall and lower wall at the horizontal chamber furnace (oven) bottom.It is possible thereby to effectively burnt plate is blocked in fixation.
In the utility model, the vertical fix bar is located in described block in burnt plate.It is possible thereby to effectively fixation is blocked
Burnt plate.
In the utility model, the fixture is horizontal fix bar, the both ends of the horizontal fix bar respectively with it is described
The inwall that burnt plate is blocked with second molten bath chamber is connected.It is possible thereby to effectively burnt plate is blocked in fixation.
Brief description of the drawings
Fig. 1 is the structural representation according to the flash iron-smelting furnace of the utility model one embodiment.
Fig. 2 is the structural representation according to the flash iron-smelting furnace of the utility model another embodiment.
Fig. 3 is the structural representation according to the flash iron-smelting furnace of the utility model further embodiment.
Fig. 4 is the structural representation according to the flash iron-smelting furnace of the utility model further embodiment.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
According to one side of the present utility model, the utility model proposes a kind of flash iron-smelting furnace.As shown in figure 1, this
The flash iron-smelting furnace of utility model embodiment includes：Vertical shaft 100, horizontal chamber furnace (oven) bottom 200, uptake flue 300 and block burnt part
400。
Wherein, have to suspend in vertical shaft 100 and smelt chamber 110, the top of vertical shaft 100 has nozzle 120；
There is melting chamber 210 in horizontal chamber furnace (oven) bottom 200, the bottom of melting chamber 210 has formed with molten bath 220, molten bath 220
There is product exit 221, the top at horizontal chamber furnace (oven) bottom 200 is connected with the lower end of vertical shaft 100, so that melting chamber 210 is with suspending
Chamber 110 is smelted to connect；
The lower end of uptake flue 300 is connected with the top at horizontal chamber furnace (oven) bottom 200 and connected with melting chamber 210, uptake flue
300 are arranged at intervals with vertical shaft 100；
Block burnt part 400 to be located in horizontal chamber furnace (oven) bottom 200 and set adjacent to vertical shaft 100, molten bath 220 is divided into and suspended
The first molten bath chamber 230 that chamber 110 connects and the second molten bath chamber 240 connected with product exit 221 are smelted, it is suitable to block burnt part 400
In coke is intercepted in the first molten bath chamber 230 and flue gas, clinker and molten iron is entered the second molten bath chamber 240 by it.
Thus, burnt part is blocked by setting in the flash iron-smelting furnace of the utility model above-described embodiment, coke is limited in sleeping
Formula furnace bottom is located at immediately below vertical shaft in space.Block burnt part by using above-mentioned and on the one hand can be substantially reduced coke and production
CO in thing gas2/H2O contact area, it on the other hand can effectively ensure that molten iron and clinker pass through and flow to the second molten bath
Chamber, while ensure that product gas passes through the free space for blocking burnt part and arriving at the second molten bath chamber top.By using this reality
Ton ferrocoke can be greatly reduced with the flash iron-smelting furnace of new above-described embodiment to consume, realize energy-saving and emission-reduction.
In addition, inventor has found, due to reducing coke layer area, and then the dosage of coke is significantly reduced, so as to save
Flash iron-smelting furnace ironmaking cost is saved.And burnt part is blocked by setting, carburization reaction space can be reduced, and then reach guarantor indirectly
Temp effect, improve carburizing efficiency.Inventor also found, block burnt part limit coke position by setting so that clinker and molten iron collection
In smelting in suspension chamber underface carry out carburization reaction, can further improve carburization reaction efficiency.
According to specific embodiment of the utility model, as shown in figure 1, it can be to block burnt net to block burnt part.It is new according to this practicality
The specific example of type, the aperture for blocking burnt net should be less than the particle diameter of coke and more than the particle diameter of clinker.Blocked from there through using above-mentioned
Coke can effectively be intercepted in the first molten bath chamber 230 and flue gas, clinker and molten iron is melted by it into second by burnt net
Cell cavity 240.Reduce coke and CO in product gas so as to effectively realize2/H2O contact area, limit coke thrombolytic agents, from
And reduce ton ferrocoke consumption.
According to specific embodiment of the utility model, the aperture for blocking burnt net is 15mm.The granularity of the coke of generally use is big
In 20mm, aperture blocking burnt net and can effectively intercept coke for 15mm is thus used, while ensure passing through for clinker.Root
According to specific embodiment of the utility model, as shown in figure 1, inner rim with horizontal chamber furnace (oven) bottom can vertically be extended by blocking burnt net
It is connected, so as to ensure to intercept coke completely.
According to specific embodiment of the utility model, as shown in Fig. 2 upwardly direction under the interior edge of the first molten bath chamber 230
It is divided into iron pelagic division 231, slag blanket area 232 and coke layer area 233, upwardly direction is divided into iron under the interior edge of the second molten bath chamber 240
Pelagic division 241 and slag blanket area 242.Wherein, iron in the molten bath chamber 240 of iron pelagic division 231 and second in the first molten bath chamber 230
What pelagic division 241 was connected to, there is same level；The molten bath chamber of slag blanket area 232 and second in first molten bath chamber 230
Slag blanket area 242 is connected in 240, has same level.
According to specific embodiment of the utility model, as shown in Fig. 2 it can be to block burnt plate to block burnt part, block burnt plate substantially along
Vertical direction extends and is fixed in horizontal chamber furnace (oven) bottom, and the top and bottom for blocking burnt plate are respectively formed with blow vent 430 and material hole
440, the lower end of blow vent 430 is higher than coke layer area, and the upper end of material hole 440 leads to less than coke layer area and in slag blanket area
The lower end of material mouth 440 is located in iron pelagic division.Thus product gas can by block the blow vent of burnt plate upper end by and enter
Second molten bath chamber, molten iron and clinker can by block the material hole of burnt plate lower end by and enter the second molten bath chamber.And coke is then
Blocked burnt plate effectively to intercept in the first molten bath intracavitary, reduce coke and CO in product gas so as to effectively realize2/H2O contact
Area, limit coke thrombolytic agents, so as to reduce a ton ferrocoke consumption.
According to specific embodiment of the utility model, block the blow vent on burnt plate and material hole can be respectively formed as it is U-shaped
Hole.Thus while coke is effectively intercepted, it is possible to increase product gas, clinker and molten iron pass through efficiency.
According to specific embodiment of the utility model, block the top and bottom of burnt plate respectively with the upper wall at horizontal chamber furnace (oven) bottom and under
Wall is spaced apart and forms blow vent and material hole, blocks burnt plate and is fixed on by fixture in horizontal chamber furnace (oven) bottom.
According to specific embodiment of the utility model, as shown in figure 3, fixture can be vertical fix bar 410, burnt plate is blocked
Both ends be connected respectively by vertical fix bar with the upper wall and lower wall at horizontal chamber furnace (oven) bottom 200.It is possible thereby to it will effectively block burnt plate
Precalculated position is fixed to, ensures passing through for product gas, clinker and molten iron while realizing and intercept coke.According to the utility model
Specific embodiment, the upper end for blocking burnt plate is higher than coke layer area 233, ensure product gas by while intercept coke；Block
The lower end of burnt plate less than coke layer area 233 and in the slag blanket area 232, ensure clinker and molten iron by while intercept it is burnt
Charcoal.Therefore, by using blocking burnt plate and can effectively intercept coke shown in Fig. 3, coke and CO in product gas are reduced2/H2O's
Contact area, limit coke thrombolytic agents, so as to reduce a ton ferrocoke consumption.
According to specific embodiment of the utility model, above-mentioned vertical fix bar can also be by being located in the side blocked in burnt plate
Formula is fixed to blocking burnt plate.The effectively fixed purpose for blocking burnt plate can equally be reached.
According to specific embodiment of the utility model, as shown in figure 4, fixture can also be horizontal fix bar 420, it is horizontal
The both ends of fix bar 420 are connected with blocking the inwall of burnt plate and the second molten bath chamber respectively.Jiao will be blocked from there through horizontal fix bar
Plate is fixed on precalculated position, so as to pass through product gas, clinker and molten iron while ensureing and intercept coke.
According to specific embodiment of the utility model, the refractory temperature for blocking burnt part of above-mentioned various concrete forms is taken the photograph for 1700
It is more than family name's degree.It is made of material of the melting temperature higher than 1700 degrees Celsius.Such as high-alumina brick can be used.Similarly, use
Above-mentioned material should be also used in the fixed fixture for blocking burnt plate.It is possible thereby to ensure to block the normal use of burnt part, while extend and block
The service life of burnt part.
Thus, have in the flash iron-smelting furnace of the utility model above-described embodiment and block burnt part and can at least reach following effect
One of：
(1) limit coke and CO in product gas2/H2O contact area, so as to reduce boudouard reaction, finally reduce ton
Ferrocoke consumption, realizes energy-saving and emission-reduction.
(2) dosage of coke is substantially reduced, saves production cost.
(3) burnt part is blocked by setting, boudouard reaction area can be reduced, while reach heat insulation effect indirectly.
(4) limit coke position so that the underface that clinker and molten iron concentrate on smelting in suspension chamber carries out carburization reaction,
Improve carburization reaction efficiency.
Embodiment 1
(1) burnt part is blocked in flash iron-smelting furnace using burnt net is blocked, the material for blocking burnt net is high-alumina brick, blocks the mesh size of burnt net
For 15mm.
(2) smelted iron using the ironmaking of above-mentioned flash iron-smelting furnace according to the following steps：Production coke size used for 25~
40mm, iron ore, coal dust, oxygen are sprayed at the nozzle of flash iron-smelting furnace, make iron ore that reduction occur in reaction tower, melt
The physicochemical change of a series of complex such as change, after the carburization that clinker and molten iron after melting pass through coke layer, flow into molten
Pond, reacted product gas pass through via burnt portion on the net is blocked and arrive at the free space on molten bath top, finally give cigarette
CO gas contents in road gas are 70%, iron coke per ton ratio 60kg/t.
Embodiment 2
(1) burnt part is blocked in flash iron-smelting furnace using burnt plate is blocked, the top and bottom of burnt plate is blocked by vertical fix bar and crouches
The upper wall of formula furnace bottom is connected with lower wall blocks burnt plate with fixation.
(2) smelted iron using the ironmaking of above-mentioned flash iron-smelting furnace according to the following steps：It is substantially the same manner as Example 1, difference
It is：Production coke size used is 20~30mm, sets an exhaust outlet in the coke layer position of body of heater, is blown at air port
Oxygen, obtain localized hyperthermia and further melt molten iron and clinker, it is 75% to finally give the CO gas contents in flue gas, ton
Iron(-)coke ratio is 100kg/t.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present utility model.In this manual, to the schematic table of above-mentioned term
Identical embodiment or example need not be directed to by stating.Moreover, specific features, structure, material or the feature of description can be
Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area
Technical staff can be carried out the different embodiments or example and the feature of different embodiments or example described in this specification
With reference to and combination.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in the scope of the utility model
It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (9)
- A kind of 1. flash iron-smelting furnace, it is characterised in that including：Vertical shaft, the vertical shaft is interior to have the smelting chamber that suspends, and the top of the vertical shaft has nozzle；Horizontal chamber furnace (oven) bottom, there is melting chamber in the horizontal chamber furnace (oven) bottom, the bottom of the melting chamber is formed with molten bath, the molten bath With product exit, the top at the horizontal chamber furnace (oven) bottom is connected with the lower end of the vertical shaft, so as to the melting chamber and institute State suspension and smelt chamber；Uptake flue, the lower end of the uptake flue be connected with the top at the horizontal chamber furnace (oven) bottom and with the melting chamber, The uptake flue is arranged at intervals with the vertical shaft；Block burnt part, it is described to block that burnt part is located in the horizontal chamber furnace (oven) bottom and the neighbouring vertical shaft is set, by the molten bath point It is described to block Jiao into the first molten bath chamber with the smelting chamber that suspends and the second molten bath chamber connected with the product exit Part is suitable to intercept coke in first molten bath intracavitary and flue gas, clinker and molten iron is entered second molten bath by it Chamber.
- 2. flash iron-smelting furnace according to claim 1, it is characterised in that it is described to block burnt part to block burnt net, it is described to block burnt net Aperture be less than coke particle diameter and more than the clinker particle diameter.
- 3. flash iron-smelting furnace according to claim 2, it is characterised in that the aperture for blocking burnt net is 15mm.
- 4. flash iron-smelting furnace according to claim 1, it is characterised in that upward side under the first molten bath chamber interior edge To iron pelagic division, slag blanket area and coke layer area is divided into, upwardly direction is divided into iron pelagic division under the second molten bath chamber interior edge It is described to block burnt part to block burnt plate with slag blanket area, it is described to block burnt plate and substantially vertically extend and be fixed on the horizontal chamber furnace (oven) bottom Interior, the top and bottom for blocking burnt plate are respectively formed with blow vent and material hole, and the lower end of the blow vent is higher than Jiao Layer of charcoal area, the upper end of the material hole is less than the coke layer area and in the slag blanket area, the lower end position of the material hole In in iron pelagic division.
- 5. flash iron-smelting furnace according to claim 4, it is characterised in that the blow vent and the material hole are formed respectively For U-shaped hole.
- 6. flash iron-smelting furnace according to claim 4, it is characterised in that the top and bottom for blocking burnt plate respectively with institute State the upper wall at horizontal chamber furnace (oven) bottom and lower wall is spaced apart and forms the blow vent and the material hole, it is described to block burnt plate and consolidated by fixture It is scheduled in the horizontal chamber furnace (oven) bottom.
- 7. flash iron-smelting furnace according to claim 6, it is characterised in that the fixture is vertical fix bar, described to block The both ends of burnt plate are connected by vertical fix bar with the upper wall and lower wall at the horizontal chamber furnace (oven) bottom respectively.
- 8. flash iron-smelting furnace according to claim 7, it is characterised in that the vertical fix bar, which is located in, described blocks burnt plate It is interior.
- 9. flash iron-smelting furnace according to claim 6, it is characterised in that the fixture is horizontal fix bar, the water The both ends of flat fix bar are connected with the inwall for blocking burnt plate and second molten bath chamber respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720157815.XU CN206624892U (en) | 2017-02-21 | 2017-02-21 | Flash iron-smelting furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720157815.XU CN206624892U (en) | 2017-02-21 | 2017-02-21 | Flash iron-smelting furnace |
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| Publication Number | Publication Date |
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| CN206624892U true CN206624892U (en) | 2017-11-10 |
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ID=60211384
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108456760A (en) * | 2017-02-21 | 2018-08-28 | 北京闪铁科技有限公司 | Flash iron-smelting furnace |
-
2017
- 2017-02-21 CN CN201720157815.XU patent/CN206624892U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108456760A (en) * | 2017-02-21 | 2018-08-28 | 北京闪铁科技有限公司 | Flash iron-smelting furnace |
| CN108456760B (en) * | 2017-02-21 | 2024-06-11 | 北京恒益正兴投资有限公司 | Flash iron-making furnace |
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Effective date of registration: 20220104 Address after: Room 528, No. 67, Fucheng Road, Haidian District, Beijing 100142 Patentee after: Beijing Hengyi Zhengxing Investment Co.,Ltd. Address before: Room 1401, 14 / F, block B, Tiangong building, No.30 Xueyuan Road, Haidian District, Beijing 100083 Patentee before: BEIJING SHANTIE TECHNOLOGY Co.,Ltd. |
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