CN108034790A - A kind of device of the preheating of raw material separate type and charging - Google Patents
A kind of device of the preheating of raw material separate type and charging Download PDFInfo
- Publication number
- CN108034790A CN108034790A CN201810047662.2A CN201810047662A CN108034790A CN 108034790 A CN108034790 A CN 108034790A CN 201810047662 A CN201810047662 A CN 201810047662A CN 108034790 A CN108034790 A CN 108034790A
- Authority
- CN
- China
- Prior art keywords
- preheating
- fascinate
- pipeline
- charging
- raw material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/527—Charging of the electric furnace
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/56—Manufacture of steel by other methods
- C21C5/562—Manufacture of steel by other methods starting from scrap
- C21C5/565—Preheating of scrap
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
- F27B3/085—Arc furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/18—Arrangements of devices for charging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses the device of a kind of preheating of raw material separate type and charging, including the preheating can that can fascinate, tank deck closing door, heat smoke pipeline, exhaust emission pipeline, swivel joint, material-receiving device；The preheating can that fascinates is arranged in electric arc furnaces side, only one opening of tank deck, and the tank deck closing door of activity is equipped with tank deck；The preheating can that can fascinate is fixed on pivot around tank body outer upper, and the preheating can that can fascinate can rotate 0 ~ 180 ° along pivot；It can fascinate to preheat and be connected to heat smoke pipeline and exhaust emission pipeline on tank, heat smoke pipeline is connected to electric arc furnaces, and exhaust emission pipeline leads to follow-up smoke processing system, and the swivel joint coaxial with pivot is equipped with heat smoke pipeline and exhaust emission pipeline；The electric arc furnaces top is equipped with material-receiving device, and the final tilted position of preheating can is corresponding with that can fascinate, and material-receiving device is equipped with dodge gate.
Description
Technical field
The invention belongs to metallurgical technology field, the electric arc furnace smelting available for raw scrap material, it can also be used to mineral etc. other
The heating melting of raw material.The device and method for preheating and feeding more particularly to a kind of raw material separate type.
Background technology
Existing use steel scrap is raw material, and in the technique that smelting production is carried out using electric arc furnaces, conventional equipment and method are out
Bell is opened, directly adds steel scrap from top, the method fume afterheat does not utilize, and charging process airborne dust is more.In order to steel scrap
Preheated, reduce the heat loss that bell opens charging, external develop simultaneously applies some technical patents, such as vibrate continuous add
Material, vertical shaft side push away charging etc..The use of above patented technology, reduces the energy consumption of scrap heating melting, and can be applied to mineral
Etc. the melting of other raw materials.But in practical applications, the continuously pre-heating and feeding device of above raw material, are asked there are respective
Topic.Continuous feeding is such as vibrated, flue gas is bad to the pre-heat effect of raw material.And vertical shaft side pushes away feeding device, feed location length
Phase is toasted by high-temperature flue gas, and equipment fault is frequent.It is therefore desirable to develop new raw material preheating and feeding device, above skill is avoided
The problem of art.
The content of the invention
To overcome above-mentioned technical problem, the present invention is to provide a kind of new separate type raw material continuously pre-heating and feeding device,
The flow and equipment of original conventional electric arc furnaces can not be changed, the preheating of raw material is realized using flue gas, and be not turned on adding for bell
Material.In addition to solving the problems, such as existing external preheating and existing with feeding technique, moreover it is possible to investment for trnasforming urban land is reduced, is reduced using limitation,
Expand application field.
To reach above-mentioned purpose, the present invention is achieved by the following technical solutions.
A kind of device of the preheating of raw material separate type and charging, including the preheating can that can fascinate, tank deck closing door, thermal chimney
Road, exhaust emission pipeline, swivel joint, material-receiving device；The preheating can that fascinates is arranged in heating furnace side, only tank deck one
A opening, the tank deck closing door of activity is equipped with tank deck；The preheating can that can fascinate is fixed on pivot around tank body outer upper,
The preheating can that can fascinate can rotate 0 ~ 180 ° along pivot；It can fascinate to preheat and be connected to heat smoke pipeline and exhaust emissions on tank
Pipeline, heat smoke pipeline are connected to heating furnace, and exhaust emission pipeline leads to follow-up smoke processing system, in heat smoke pipeline and tail
Gas discharge tube is equipped with the swivel joint coaxial with pivot；The heating furnace top is equipped with material-receiving device, with that can fascinate
The final tilted position of preheating can corresponds to, and material-receiving device is equipped with dodge gate.The heat smoke that heating furnace produces enters along heat smoke pipeline
In preheating can, material can be rotated along pivot to the preheating can that after certain temperature, can fascinate and docked with material-receiving device in heating tank,
The material of preheating is poured into heating furnace, due to heat smoke pipeline and exhaust emission pipeline be equipped with it is coaxial with pivot
Swivel joint, guarantee can fascinate preheating can at rotating any position, heat smoke pipeline and exhaust emission pipeline all the time with
Tank body is connected.
The device of at least a set of preheating of raw material separate type and charging is further set outside a heating furnace.According to heating furnace
Amount of capacity can set the device of multiple preheatings and charging outside a heating furnace.
Further burner noz(zle) is equipped with the heat smoke pipeline.Burnt, carried by spraying into fuel or combustion-supporting gas
The pre-heat effect of high steel scrap.
Further electrical induction device is equipped with the preheating can that fascinates.Increase preheating heat source.
Further the heat smoke pipeline is connected with the preheating can top that can fascinate, exhaust emission pipeline and can fascinate preheating
Tank lower part connects；Or heat smoke pipeline is connected with the preheating can lower part that can fascinate, exhaust emission pipeline and can be fascinated preheating can top
Connection；Or heat smoke pipeline in the middle part of the preheating can that can fascinate with being connected, exhaust emission pipeline is discharged from the preheating can upper and lower part that can fascinate
And merge into a pipeline.
Further described its cross section of preheating can of fascinating can use the various envelopes such as circle, rectangle, polygon, ellipse
Closing cross section shape, and be in the small shape of mouth outsole.So that raw material smoothly passes in and out.
Further the outlet of the entrance, exhaust emission pipeline of heat smoke pipeline is arranged on the preheating can that fascinates
Side away from heating furnace.When preheating can rotates to any position, raw material can be avoided to enter heat smoke pipeline and tail gas row
Put in pipeline.
Further the tank deck closing door is turnover plate type, and center of rotation is located at the preheating can that fascinates away from pivot
Outside.
Further the tank deck closing door is board plug type, and alternatively distributed groove and convex is equipped with the outside of tank deck closing door
Rib；Dodge gate is located at material-receiving device topmost, and the groove and fin to match with tank deck closing door is equipped with the outside of dodge gate.Preheating
When on tank rotation back-off to material-receiving device, tank deck closing door is engaged with dodge gate, is extracted two fan doors of occlusion out at this time, is completed to add
Material, does not have any flue gas, dust effusion.
Beneficial effect：Compared with prior art, the advantage of the invention is that：
1）The preheating of raw material is realized using flue gas of heating furnace, recycle heat uses, and reduces heating cost；
2）The preheating can that can fascinate only has raw material inlet and outlet, and heat smoke pipeline, exhaust emission pipeline all the time with tank body phase
Even, better tightness, can ensure more preferable pre-heat effect, improve efficiency of energy utilization；
3）Whole device can separate arrangement with heating furnace, and need not be arranged in above heating furnace, to furnace apparatus and
Factory building height does not require, and transformation difficulty is low, and field applicatory is more；
4）Charging process is relatively closed, reduces excessive, the energy conservation and environmental protection of flue gas and dust.
Brief description of the drawings
Fig. 1 is the schematic diagram of the device of the invention and the method for operation；
Fig. 2 is the material feeding view of the present invention；
Fig. 3 is the preheating view of the present invention；
Fig. 4 is the charging view of the present invention；
The preheating can and heat smoke pipeline and exhaust emission pipeline connected mode schematic diagram of Fig. 5 positions present invention；
Wherein, 1. can fascinate preheating can；2. heat smoke entrance；3. offgas outlet；4. tank deck closing door；5. pivot；6. connect
Expect device；7. electric arc furnaces；8. heat smoke pipeline；9. exhaust emission pipeline；10. swivel joint；11. feeding device；12. burning
Nozzle.
Embodiment
With reference to example, the present invention is described in further detail.Raw material used in the present invention is commercial product.
Embodiment 1
The heating furnace is to use electric arc furnaces of the electric arc for thermal energy.
As shown in Figure 1, the device of a kind of raw material separate type preheating and charging, including the preheating can 1 that can fascinate, tank deck closing door
4th, heat smoke pipeline 8, exhaust emission pipeline 9, swivel joint 10, material-receiving device 6；The preheating can 1 that fascinates is arranged in electric arc
7 side of stove, only one opening of tank deck, the tank deck closing door 4 of activity is equipped with tank deck；The preheating can 1 that can fascinate is outside tank body
Upper lateral part is fixed on pivot 5, and the preheating can 1 that can fascinate can rotate 0 ~ 180 ° along pivot 5；Can be fascinated 1 tank body of preheating can
On be connected to heat smoke pipeline 8 and exhaust emission pipeline 9, heat smoke pipeline 8 is connected to electric arc furnaces 7, and exhaust emission pipeline 9 leads to subsequently
Smoke processing system, the swivel joint 10 coaxial with pivot 5 is equipped with heat smoke pipeline 8 and exhaust emission pipeline 9；
7 top of electric arc furnaces is equipped with material-receiving device 6, and 1 final tilted position of preheating can is corresponding with that can fascinate, and material-receiving device 6, which is equipped with, lives
Dynamic door.
The preheating can 1 that can fascinate separates arrangement with electric arc furnaces 7, both are not connected as a single entity.Original electric arc furnaces 7 can not so be changed
Flow and equipment, realize and raw scrap material preheated using flue gas, and be not turned on electric arc furnaces 7 lid charging function.
As shown in Figure 3：The preheating can 1 that fascinates of this example is the barreled container made of steel plate and refractory material, only
An opening is opened up in tank top, the tank deck closing door 4 that opening and closing may be reversed is set in opening, can fascinate its cross section of preheating can 1
The various closed cross-section shapes such as circle, rectangle, polygon, ellipse can be used, and pot bottom section is less than tank mouth section, with
Just the smooth disengaging of raw scrap material.
As shown in Figure 1,2,3, 4：The preheating can 1 that fascinates of this example can be rotated around the pivot 5 on the side of electric arc furnaces 7,
Preheating can 1 can be fascinated can be from initial position：Tank mouth state vertically upward, rotates to material-receiving device 6 to 7 direction of electric arc furnaces and docks
Untill, tank mouth is diagonally downward at this time；The preheating can 1 that can fascinate fascinates using hydraulic-driven or motor driving.
As shown in Figure 1, shown in Figure 5, in 8 one end of heat smoke pipeline connection, 7 stove of electric arc furnaces, the other end leads to same with pivot 5
The position in axle center, positioned at the right side for the preheating can 1 that can fascinate, after swivel joint 10, then accesses 1 lower part of preheating can that can fascinate
Heat smoke entrance 2；1 top of preheating can that can fascinate is equipped with offgas outlet 3, and heat smoke be able to can fascinate pre- from 2 entrance of heat smoke entrance
In hot tank 1, from below to up through the steel scrap gap in tank, into the offgas outlet 3 on top.One end of exhaust emission pipeline 9 connects
The offgas outlet 3 for the preheating can 1 that can fascinate is connected on, the other end leads to the position coaxial with pivot 5, positioned at the preheating can that can fascinate
1 left side, after another swivel joint 10, then accesses follow-up smoke processing system.Heat smoke pipeline 8 and exhaust emissions
Pipeline 9, is respectively arranged through the both sides for the preheating can 1 that can fascinate, and all passes through respective and coaxial pivot 5 swivel joint 10
Preheating can 1 is connected with that can fascinate, no matter the preheating can 1 that can so ensure to fascinate rotates to any position, 8 He of heat smoke pipeline
Exhaust emission pipeline 9 is all communicated with the preheating can 1 that can fascinate all the time.Heat smoke entrance 2 and offgas outlet 3 lead to diagonally downward can
Fascinate preheating can 1, and is arranged in side of the preheating can 1 away from electric arc furnaces 7 that can fascinate, and the steel scrap in such tank is loading, fascinating
And during pouring into electric arc furnaces 7, raw scrap material can be avoided to drop in heat smoke entrance 2 and offgas outlet 3.
As Figure 1 and Figure 4, material-receiving device 6 is located at the top of electric arc furnaces 7, is the chute that band can be opened and closed dodge gate, when can
When the steel scrap in preheating can 1 that fascinates will be added in electric arc furnaces 7, the dodge gate of material-receiving device 6 is opened, and steel scrap can be imported into electric arc
In stove 7.During non-splicing state, material-receiving device 6 is in closed state, reduces the discharge of hot gas in stove.
As shown in figure 3, setting a set of preheating can 1 that fascinates on the side of electric arc furnaces 7, its volume needs to load useless for electric arc furnaces 7
The 50% of steel amount, can complete the charging and preheating of 7 one smelting cycles of electric arc furnaces by the preheating and addition of 2 ~ 3 times.
As shown in Fig. 2, the feeding device 11 of this example can use drop-bottom steel scrap batch can, steel scrap, which is disposably poured into, to incline
In dynamic preheating can 1, charging rate is fast, can quickly be removed after charging, the action of fascinating for the preheating can 1 that do not influence to fascinate.Also may be used
Raw scrap material is added into the preheating can 1 that can fascinate using other such as bucket elevators, belt or chain and pan conveyor other manner
In.
Embodiment 2
The heating furnace is to use smelting furnace of the electromagnetic induction for thermal energy.
It is substantially the same manner as Example 1, except that burning is set at heat smoke entrance 2 in heat smoke pipeline 8
Nozzle 12, can be burnt to being heated at heat smoke entrance 22, improves the pre- of steel scrap by spraying into fuel or combustion-supporting gas
Thermal effect；Heat smoke entrance 2 is located at 1 lower part of preheating can that can fascinate, offgas outlet 3 is located at 1 top of preheating can that can fascinate.In melting
Two sets of preheating cans 1 that can fascinate are set by stove, the volume for the preheating can 1 that can each fascinate needs to load the 50% of steel scrap amount for smelting furnace,
The charging and preheating of one smelting cycle of smelting furnace can be completed by the preheating and addition of 1 time.
Embodiment 3
The heating furnace is the stove with heating function using other energy as thermal energy.
It is substantially the same manner as Example 2, except that electrical induction device is equipped with the preheating can 1 that can fascinate, further
Improve the pre-heat effect of steel scrap；Heat smoke entrance 2 is located at the middle part of preheating can 1 that can fascinate, offgas outlet 3 is located at the preheating can that can fascinate
1 upper/lower terminal, exhaust emission pipeline 9 are connected with two offgas outlets 3 respectively, are then merged into a pipeline, are connect by rotation
The follow-up smoke processing system of first 10 access；Tank deck closing door 4 is board plug type, is equipped with and is alternately distributed in the outside of tank deck closing door 4
Groove and fin；Dodge gate is located at material-receiving device 6 topmost, recessed equipped with matching with tank deck closing door 4 on the outside of dodge gate
Groove and fin, when preheating can rotation is buckled to material-receiving device 6, tank deck closing door 4 is engaged with dodge gate, extraction occlusion at this time
Two fan doors, complete charging, do not have any flue gas, dust effusion.
The present invention is illustrated according to above-described embodiment, it will be appreciated that above-described embodiment does not limit this in any form
Invention, all technical solutions obtained using equivalent substitution or equivalent transformation mode, are within the scope of the present invention.
Claims (9)
1. a kind of preheating of raw material separate type and the device of charging, it is characterised in that including the preheating can that can fascinate, tank deck closing door,
Heat smoke pipeline, exhaust emission pipeline, swivel joint, material-receiving device；
The preheating can that fascinates is arranged in heating furnace side, only one opening of tank deck, and the tank deck envelope of activity is equipped with tank deck
Close door；The preheating can that can fascinate is fixed on pivot around tank body outer upper, and the preheating can that can fascinate can rotate 0 along pivot
~180°；It can fascinate to preheat and be connected to heat smoke pipeline and exhaust emission pipeline on tank, heat smoke pipeline is connected to heating furnace, tail
Gas discharge tube leads to follow-up smoke processing system, is equipped with heat smoke pipeline and exhaust emission pipeline same with pivot
The swivel joint of axis；
The heating furnace top is equipped with material-receiving device, and the final tilted position of preheating can is corresponding with that can fascinate, and material-receiving device, which is equipped with, lives
Dynamic door.
2. a kind of raw material separate type preheating according to claim 1 and the device of charging, it is characterised in that a heating furnace
At least a set of raw material separate type preheating of outer setting and the device of charging.
3. a kind of raw material separate type preheating according to claim 1 and the device of charging, it is characterised in that the heat smoke
Burner noz(zle) is equipped with pipeline.
4. a kind of raw material separate type preheating according to claim 1 and the device of charging, it is characterised in that described to fascinate
Electrical induction device is equipped with preheating can.
5. a kind of raw material separate type preheating according to claim 1 and the device of charging, it is characterised in that the heat smoke
Pipeline is connected with the preheating can top that can fascinate, exhaust emission pipeline is connected with the preheating can lower part that can fascinate；Or heat smoke pipeline with
Can fascinating, preheating can lower part connects, exhaust emission pipeline is connected with the preheating can top that can fascinate；Or heat smoke pipeline is with that can fascinate
Connection, exhaust emission pipeline discharge from the preheating can upper and lower part that can fascinate and merge into a pipeline in the middle part of preheating can.
6. a kind of raw material separate type preheating according to claim 1 and the device of charging, it is characterised in that described to fascinate
Its cross section of preheating can use the various closed cross-section shapes such as circle, rectangle, polygon, ellipse, and small in mouth outsole
Shape.
7. a kind of raw material separate type preheating according to claim 1 and the device of charging, it is characterised in that described to fascinate
The outlet of the entrance of heat smoke pipeline, exhaust emission pipeline is arranged in the side away from heating furnace on preheating can.
8. a kind of raw material separate type preheating according to claim 1 and the device of charging, it is characterised in that the tank deck envelope
It is turnover plate type to close door, and center of rotation is located on the outside of the preheating can that fascinates away from pivot.
9. a kind of raw material separate type preheating according to claim 1 and the device of charging, it is characterised in that the tank deck envelope
It is board plug type to close door, and alternatively distributed groove and fin are equipped with the outside of tank deck closing door；It is most upper that dodge gate is located at material-receiving device
End, dodge gate outside are equipped with the groove and fin to match with tank deck closing door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810047662.2A CN108034790B (en) | 2018-01-18 | 2018-01-18 | Raw materials disconnect-type preheats and reinforced device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810047662.2A CN108034790B (en) | 2018-01-18 | 2018-01-18 | Raw materials disconnect-type preheats and reinforced device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108034790A true CN108034790A (en) | 2018-05-15 |
| CN108034790B CN108034790B (en) | 2023-02-28 |
Family
ID=62096373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810047662.2A Active CN108034790B (en) | 2018-01-18 | 2018-01-18 | Raw materials disconnect-type preheats and reinforced device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108034790B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108624739A (en) * | 2018-07-09 | 2018-10-09 | 中冶京诚工程技术有限公司 | A kind of steelmaking equipment and smelting process with steel scrap steel-making |
| CN108624740A (en) * | 2018-07-09 | 2018-10-09 | 中冶京诚工程技术有限公司 | A kind of steelmaking equipment and smelting process with steel scrap steel-making |
| CN109724405A (en) * | 2019-01-11 | 2019-05-07 | 丰镇市新太新材料科技有限公司 | A kind of high carbon ferro-chrome for preparing is with energy saving and environment friendly electric furnace |
| CN111139334A (en) * | 2020-01-16 | 2020-05-12 | 中冶赛迪工程技术股份有限公司 | Scrap steel trough with induction heating |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108624739A (en) * | 2018-07-09 | 2018-10-09 | 中冶京诚工程技术有限公司 | A kind of steelmaking equipment and smelting process with steel scrap steel-making |
| CN108624740A (en) * | 2018-07-09 | 2018-10-09 | 中冶京诚工程技术有限公司 | A kind of steelmaking equipment and smelting process with steel scrap steel-making |
| CN108624739B (en) * | 2018-07-09 | 2023-05-12 | 中冶京诚工程技术有限公司 | Steelmaking equipment and smelting method for steelmaking by using scrap steel |
| CN108624740B (en) * | 2018-07-09 | 2023-05-16 | 中冶京诚工程技术有限公司 | Steelmaking equipment and smelting method for steelmaking by using scrap steel |
| CN109724405A (en) * | 2019-01-11 | 2019-05-07 | 丰镇市新太新材料科技有限公司 | A kind of high carbon ferro-chrome for preparing is with energy saving and environment friendly electric furnace |
| CN111139334A (en) * | 2020-01-16 | 2020-05-12 | 中冶赛迪工程技术股份有限公司 | Scrap steel trough with induction heating |
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| Publication number | Publication date |
|---|---|
| CN108034790B (en) | 2023-02-28 |
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