CN220437090U - Tunnel kiln for carbon reduction of ferrovanadium - Google Patents
Tunnel kiln for carbon reduction of ferrovanadium Download PDFInfo
- Publication number
- CN220437090U CN220437090U CN202322053819.1U CN202322053819U CN220437090U CN 220437090 U CN220437090 U CN 220437090U CN 202322053819 U CN202322053819 U CN 202322053819U CN 220437090 U CN220437090 U CN 220437090U
- Authority
- CN
- China
- Prior art keywords
- section
- sintering
- reaction
- cooling
- ferrovanadium
- 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.)
- Active
Links
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 229910000628 Ferrovanadium Inorganic materials 0.000 title claims abstract description 37
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 28
- 238000005245 sintering Methods 0.000 claims abstract description 45
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 238000004321 preservation Methods 0.000 claims abstract description 19
- 230000000694 effects Effects 0.000 claims abstract description 9
- 239000000498 cooling water Substances 0.000 claims abstract description 4
- 230000009970 fire resistant effect Effects 0.000 claims abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 30
- 229910052782 aluminium Inorganic materials 0.000 claims description 29
- 239000011449 brick Substances 0.000 claims description 29
- 229920000742 Cotton Polymers 0.000 claims description 19
- 239000011810 insulating material Substances 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 239000011819 refractory material Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 8
- 229910002091 carbon monoxide Inorganic materials 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 5
- 229910052720 vanadium Inorganic materials 0.000 description 5
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 5
- 229910001935 vanadium oxide Inorganic materials 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 241000950638 Symphysodon discus Species 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000013072 incoming material Substances 0.000 description 1
- HOQADATXFBOEGG-UHFFFAOYSA-N isofenphos Chemical compound CCOP(=S)(NC(C)C)OC1=CC=CC=C1C(=O)OC(C)C HOQADATXFBOEGG-UHFFFAOYSA-N 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The utility model provides a tunnel cave for carbon reduction ferrovanadium includes intensification section, reaction section, sintering section, cooling section, intensification section, reaction section, sintering section, cooling section set gradually, and it has the shielding gas to flood in the tunnel cave, and the shielding gas air inlet is located the cooling section, and the shielding gas outlet is located the reaction section, intensification section, reaction section, sintering section are equipped with temperature control system to control the temperature of intensification section, reaction section, sintering section respectively, intensification section, reaction section, sintering section are equipped with the fire-resistant heat preservation inside lining of multilayer that the density is different respectively, in order to promote the heat preservation effect, the lateral wall of cooling section is equipped with the cooling water sleeve pipe, in order to accelerate the cooling of ferrovanadium. The tunnel kiln for reducing ferrovanadium by carbon is divided into four sections, and refractory materials with different densities are arranged in the heating section, the reaction section and the sintering section according to different heat preservation requirements and different refractory requirements, so that the heat preservation effect of the tunnel kiln is improved and the energy consumption is reduced while the refractory strength is ensured.
Description
Technical Field
The utility model relates to the technical field of ferrovanadium smelting, in particular to a tunnel kiln for carbon reduction of ferrovanadium.
Background
In the traditional production of ferrovanadium, vanadium oxide, aluminum powder and iron nails are uniformly mixed according to the proportion required by the process, are filled into a reaction furnace body which is well beaten in advance, and are ignited by an igniter. The ignited material is burnt vigorously to remove oxygen in vanadium oxide in a burning way, and the refining is completed through a refining furnace. And (3) turning over the refined discus out of the furnace by using a tool, and cooling and crushing to obtain a ferrovanadium product. The traditional ferrovanadium production has the advantages of long process flow, discontinuous production, complex operation, severe reaction and high production cost.
The tunnel kiln can realize continuous smelting of materials, and the tunnel kiln has three sections, namely a preheating section, a roasting section and a cooling section. The roasting section reduces vanadium oxide and fuses the vanadium oxide with iron to form vanadium-iron alloy. Because the tunnel kiln is in an open state and the temperature of the roasting section is very high, the energy consumption in the ferrovanadium preparation process is high.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a tunnel kiln for carbon reduction of ferrovanadium that reduces energy consumption and saves production costs.
The utility model provides a tunnel cave for carbon reduction ferrovanadium includes intensification section, reaction section, sintering section, cooling section, intensification section, reaction section, sintering section, cooling section set gradually, and it has the shielding gas to flood in the tunnel cave, and the shielding gas air inlet is located the cooling section, and the shielding gas outlet is located the reaction section, intensification section, reaction section, sintering section are equipped with temperature control system to control the temperature of intensification section, reaction section, sintering section respectively, intensification section, reaction section, sintering section are equipped with the fire-resistant heat preservation inside lining of multilayer that the density is different respectively, in order to promote the heat preservation effect, the lateral wall of cooling section is equipped with the cooling water sleeve pipe, in order to accelerate the cooling of ferrovanadium.
In the tunnel kiln for reducing ferrovanadium by carbon, preferably, the refractory heat-insulating lining of the heating section comprises heat-insulating cotton and a plurality of layers of aluminum refractory bricks, the heat-insulating cotton is wrapped on the outer wall of the heating section, and the density of each layer of aluminum refractory bricks is 0.8, 1.0, 1.2, 1.4, 1.7 and 2.3g/cm from outside to inside 3 The thickness of the aluminum refractory brick is 65mm.
In the tunnel kiln for reducing ferrovanadium by carbon, preferably, the refractory insulation lining of the reaction section comprises insulation cotton and a plurality of layers of aluminum refractory bricks, the insulation cotton is wrapped on the outer wall of the reaction section, and the density of each layer of aluminum refractory bricks is 0.8, 1.0, 1.2, 1.4, 1.7 and 3.0g/cm from outside to inside 3 The thickness of the aluminum refractory brick is 65mm.
In the tunnel kiln for reducing ferrovanadium by carbon, preferably, the refractory heat-insulating lining of the sintering section comprises heat-insulating cotton, a plurality of layers of aluminum refractory bricks and inert heat-insulating material layers, wherein the heat-insulating cotton is wrapped on the outer wall of the sintering section, and the density of each layer of aluminum refractory bricks is 0.8, 1.0, 1.2, 1.4 and 1.7g/cm from outside to inside 3 The thickness of the aluminum refractory brick is 65mm.
In the tunnel kiln for reducing ferrovanadium by carbon, preferably, the sectional areas of the heating section, the reaction section, the sintering section and the cooling section are sequentially reduced, so that air flow flowing from the cooling section to the heating section is formed in the tunnel kiln.
In the tunnel kiln for reducing ferrovanadium by carbon, preferably, the temperature control system comprises a temperature sensor, a controller and an electric heater, wherein the temperature sensor is respectively arranged in the heating section, the reaction section and the sintering section, the controller is electrically connected with the temperature sensor, the temperature sensor respectively collects temperature information of the heating section, the reaction section and the sintering section and transmits the temperature information to the controller, and the controller is electrically connected with the electric heater to control the running power of the electric heater.
The beneficial effects are that: the tunnel kiln for reducing ferrovanadium by carbon is divided into four sections, and refractory materials with different densities are arranged in the heating section, the reaction section and the sintering section according to different heat preservation requirements and different refractory requirements, so that the heat preservation effect of the tunnel kiln is improved and the energy consumption is reduced while the refractory strength is ensured. Meanwhile, the original three-section kiln of the tunnel kiln is changed into a four-section kiln, so that the reduction process and the melting process of the ferrovanadium are separated. Therefore, the temperature in the kiln of the reaction section is lower than that in the kiln of the sintering section, and compared with a three-section kiln, the energy consumption for preparing the ferrovanadium can be effectively reduced.
Drawings
Fig. 1 is a schematic structural view of a tunnel kiln for carbon reduction of ferrovanadium according to the present utility model.
Fig. 2 is a schematic structural view of a temperature rising section of the tunnel kiln for carbon reduction of ferrovanadium of the present utility model.
Fig. 3 is a schematic structural view of a reaction section of a tunnel kiln for carbon reduction of ferrovanadium according to the present utility model.
Fig. 4 is a schematic structural view of a sintering section of a tunnel kiln for carbon reduction of ferrovanadium according to the present utility model.
In the figure: the device comprises a tunnel kiln 10 for carbon reduction of ferrovanadium, a heating section 20, a reaction section 30, a shielding gas outlet 301, a sintering section 40, a cooling section 50, a shielding gas inlet 501, a fireproof heat-insulating lining 60, heat-insulating cotton 601, aluminum refractory bricks 602, an inert heat-insulating material layer 603 and an electric heater 70.
Description of the embodiments
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Referring to fig. 1 to 4, a tunnel kiln 10 for reducing ferrovanadium by carbon comprises a heating section 20, a reaction section 30, a sintering section 40 and a cooling section 50, wherein the heating section 20, the reaction section 30, the sintering section 40 and the cooling section 50 are sequentially arranged, a protective gas is filled in the tunnel kiln, a protective gas inlet 501 is positioned in the cooling section 50, a protective gas outlet 301 is positioned in the reaction section 30, a temperature control system is arranged in the heating section 20, the reaction section 30 and the sintering section 40 to respectively control the temperatures of the heating section 20, the reaction section 30 and the sintering section 40, a multi-layer refractory heat preservation lining 60 with different densities is respectively arranged in the heating section 20, the reaction section 30 and the sintering section 40 to promote the heat preservation effect, and a cooling water sleeve is arranged on the side wall of the cooling section 50 to accelerate the temperature reduction of ferrovanadium.
The heating section 20 of the tunnel kiln is used for preheating raw materials for producing ferrovanadium so as to reduce the material reduction time of the reaction section 30 of the raw materials and improve the production efficiency. The kiln interior temperature of the warm section 20 is less than 750 degrees celsius.
The reaction section 30 of the tunnel kiln of the present utility model is used to reduce the oxides of vanadium to elemental vanadium. Specifically, the oxide of vanadium reacts with carbon in the incoming material to produce carbon monoxide or carbon dioxide. The temperature in the kiln of the reaction section 30 is 750-1250 ℃.
The sintering section 40 of the tunnel kiln of the present utility model is used to fuse elemental vanadium with elemental iron to form a vanadium-iron alloy. The kiln temperature of the sintering section 40 is 1250-1500 degrees celsius.
The shielding gas may be nitrogen, helium, argon, etc. However, in a preferred embodiment, the shielding gas used in the present utility model is carbon monoxide. Carbon monoxide has several benefits as a shielding gas. First, high concentration of carbon monoxide can reduce vanadium, thereby accelerating the reaction rate. Carbon in the raw material reacts with vanadium oxide to generate carbon monoxide, and no new impurities are introduced into the shielding gas. Carbon dioxide generated by the reaction also reacts with carbon in the tunnel kiln to generate carbon monoxide, and the whole process protective gas does not need to be purified. When the carbon monoxide concentration exceeds the range, carbon monoxide may be extracted as fuel gas.
The temperatures in the kiln of the heating section 20, the reaction section 30 and the sintering section 40 are relatively high, but the upper and lower temperature limits are different. Ideally, the better the heat preservation effect of the lining of the tunnel kiln is, the smaller the energy consumption in the production process is. The lining of a typical tunnel kiln employs aluminum refractory bricks 602 as the lining material. The lower the density of the refractory bricks is, the better the heat preservation effect is, but the high temperature resistance performance is correspondingly deteriorated. If only the heat preservation performance of the refractory brick is emphasized, the refractory brick can be used for a long time under the action of high temperature, and the service life can be shortened.
Considering the heat preservation effect and the service life of the lining of the tunnel kiln comprehensively, in a preferred embodiment, the fireproof heat preservation lining 60 of the heating section 20 comprises heat preservation cotton 601 and a plurality of layers of aluminum fireproof bricks 602, the heat preservation cotton 601 is wrapped on the outer wall of the heating section 20, and the density of each layer of aluminum fireproof bricks 602 from outside to inside is respectively 0.8, 1.0, 1.2, 1.4, 1.7 and 2.3g/cm 3 The thickness of the aluminum firebrick 602 is 65mm.
In a preferred embodiment, the refractory and heat-insulating lining 60 of the reaction section 30 comprises heat-insulating cotton 601 and a plurality of layers of aluminum refractory bricks 602, wherein the heat-insulating cotton 601 is wrapped on the outer wall of the reaction section 30, and the density of each layer of aluminum refractory bricks 602 is 0.8, 1.0, 1.2, 1.4, 1.7 and 3.0g/cm from outside to inside 3 The thickness of the aluminum firebrick 602 is 65mm.
In a preferred embodiment, the refractory and heat-insulating lining 60 of the sintering section 40 comprises heat-insulating cotton 601, a plurality of layers of aluminum refractory bricks 602 and an inert heat-insulating material layer 603, wherein the heat-insulating cotton 601 is wrapped on the outer wall of the sintering section 40, and the density of each layer of aluminum refractory bricks 602 from outside to inside is respectively 0.8, 1.0, 1.2, 1.4 and 1.7g/cm 3 The thickness of the aluminum firebrick 602 is65mm。
The inert insulating material layer 603 may be a ceramic material that is resistant to corrosion and high temperatures, such as silicon carbide, silicon nitride, and the like.
In order to provide better fluidity of the shielding gas, in a preferred embodiment, the cross-sectional areas of the heating section 20, the reaction section 30, the sintering section 40, and the cooling section 50 are sequentially reduced, so that a gas flow flowing from the cooling section 50 to the heating section 20 is formed in the tunnel kiln. In a specific embodiment, the side walls of the heating section 20, the reaction section 30, the sintering section 40 and the cooling section 50 of the tunnel kiln are on the same plane, and the tops of the heating section 20, the reaction section 30, the sintering section 40 and the cooling section 50 are stepped downwards.
In a preferred embodiment, the temperature control system includes a temperature sensor, a controller, and an electric heater 70, wherein the temperature sensor is respectively disposed in the heating section 20, the reaction section 30, and the sintering section 40, the controller is electrically connected to the temperature sensor, the temperature sensor respectively collects temperature information of the heating section 20, the reaction section 30, and the sintering section 40, and transmits the temperature information to the controller, and the controller is further electrically connected to the electric heater 70 to control the operation power of the electric heater 70.
The temperature control system is used to regulate the temperature of each section in the tunnel kiln, and the electric heater 70 is an electric heating rod in a preferred embodiment. The electric heating rod is vertically arranged in the tunnel kiln. The temperature in the kiln is set to a corresponding value according to the actual temperature required by production, and positive and negative deviations are set, so that the data can be automatically fine-tuned.
The foregoing disclosure is illustrative of the preferred embodiments of the present utility model, and is not to be construed as limiting the scope of the utility model, as it is understood by those skilled in the art that all or part of the above-described embodiments may be practiced with equivalents thereof, which fall within the scope of the utility model as defined by the appended claims.
Claims (6)
1. A tunnel kiln for carbon reduction of ferrovanadium, characterized in that: including intensification section, reaction section, sintering section, cooling section, intensification section, reaction section, sintering section, cooling section set gradually, are full of shielding gas in the tunnel cave, and the shielding gas air inlet is located the cooling section, and the shielding gas outlet is located the reaction section, intensification section, reaction section, sintering section are equipped with temperature control system to control the temperature of intensification section, reaction section, sintering section respectively, intensification section, reaction section, sintering section are equipped with the fire-resistant heat preservation inside lining of multilayer that the density is different respectively, in order to promote the heat preservation effect, the lateral wall of cooling section is equipped with the cooling water sleeve pipe, in order to accelerate the cooling of ferrovanadium.
2. Tunnel kiln for carbon reduction of ferrovanadium according to claim 1, wherein: the fireproof heat-insulating lining of the heating section comprises heat-insulating cotton and a plurality of layers of aluminum refractory bricks, the heat-insulating cotton is wrapped on the outer wall of the heating section, and the density of each layer of aluminum refractory bricks is 0.8, 1.0, 1.2, 1.4, 1.7 and 2.3g/cm from outside to inside 3 The thickness of the aluminum refractory brick is 65mm.
3. Tunnel kiln for carbon reduction of ferrovanadium according to claim 1, wherein: the fireproof heat-insulating lining of the reaction section comprises heat-insulating cotton and a plurality of layers of aluminum refractory bricks, the heat-insulating cotton is wrapped on the outer wall of the reaction section, and the density of each layer of aluminum refractory bricks is 0.8, 1.0, 1.2, 1.4, 1.7 and 3.0g/cm from outside to inside 3 The thickness of the aluminum refractory brick is 65mm.
4. Tunnel kiln for carbon reduction of ferrovanadium according to claim 1, wherein: the fireproof heat-insulating lining of the sintering section comprises heat-insulating cotton, a plurality of layers of aluminum refractory bricks and an inert heat-insulating material layer, wherein the heat-insulating cotton is wrapped on the outer wall of the sintering section, and the density of each layer of aluminum refractory bricks is 0.8, 1.0, 1.2, 1.4 and 1.7g/cm from outside to inside respectively 3 The thickness of the aluminum refractory brick is 65mm.
5. Tunnel kiln for carbon reduction of ferrovanadium according to claim 1, wherein: the sectional areas of the heating section, the reaction section, the sintering section and the cooling section are sequentially reduced, so that air flow flowing from the cooling section to the heating section is formed in the tunnel kiln.
6. Tunnel kiln for carbon reduction of ferrovanadium according to claim 1, wherein: the temperature control system comprises a temperature sensor, a controller and an electric heater, wherein the temperature sensor is respectively arranged in the temperature rising section, the reaction section and the sintering section, the controller is electrically connected with the temperature sensor, the temperature sensor respectively collects temperature information of the temperature rising section, the reaction section and the sintering section and transmits the temperature information to the controller, and the controller is electrically connected with the electric heater to control the running power of the electric heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322053819.1U CN220437090U (en) | 2023-08-01 | 2023-08-01 | Tunnel kiln for carbon reduction of ferrovanadium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322053819.1U CN220437090U (en) | 2023-08-01 | 2023-08-01 | Tunnel kiln for carbon reduction of ferrovanadium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220437090U true CN220437090U (en) | 2024-02-02 |
Family
ID=89687116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322053819.1U Active CN220437090U (en) | 2023-08-01 | 2023-08-01 | Tunnel kiln for carbon reduction of ferrovanadium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220437090U (en) |
-
2023
- 2023-08-01 CN CN202322053819.1U patent/CN220437090U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201250269Y (en) | Copper-nickel ore smelting furnace | |
| CN107663588B (en) | A kind of method of melting continuously carbide slag | |
| CN102284762B (en) | Horizontal no-muffle pushing rod type continuous brazing furnace | |
| CN104651636B (en) | Vacuum electric heat refining magnesium equipment with protection device | |
| CN201819534U (en) | Fully automatic and vertical intermediate-frequency carbonization furnace | |
| CN206705696U (en) | A kind of furnace of calcium carbide | |
| CN107904347A (en) | A kind of coal-based direct reduction shaft furnace and its restoring method | |
| CN106966394A (en) | A kind of furnace of calcium carbide | |
| CN220437090U (en) | Tunnel kiln for carbon reduction of ferrovanadium | |
| CN102796883A (en) | Oxygen-enriched side-blown smelting furnace for complex and difficult-to-treat gold concentrate | |
| CN107287423A (en) | A kind of continuous aluminium metallurgy device | |
| CN217058351U (en) | High-frequency graphite continuous aluminum melting furnace | |
| CN202522062U (en) | Copper and copper alloy intermediate-frequency induction melting furnace | |
| CN102288032B (en) | Heat compensation composite sintering method for sintering machine material surface in metallurgical industry | |
| CN106500507A (en) | A kind of heavy oil combustion, fuel gas buring and electric arc combined heat smelting furnace | |
| JPH101728A (en) | Reduction treatment of tin oxide and device therefor | |
| CN1153837C (en) | Process for smelting zinc | |
| CN207031518U (en) | A kind of continuous aluminium metallurgy device | |
| CN202066345U (en) | Smelting furnace suitable for copper alloy furnace liner | |
| WO2001012866A1 (en) | Pyrometallurgy of zinc and closed furnace for zinc smelting | |
| CN205897841U (en) | Metallurgical smelting furnace of copper scrap | |
| CN216925127U (en) | Intermediate frequency furnace lining structure for preparing ultra-low carbon alloy | |
| JPH03117882A (en) | Open arc furnace for thermally reducing carbon in metal oxide | |
| WO2017024535A1 (en) | Melting separation furnace and method for treating material to be melted and separated with same | |
| WO2017024537A1 (en) | Melting separation furnace and method for treating material to be melted and separated with same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |