CN110806113B - Method and device for reducing energy consumption by introducing gas into submerged arc furnace - Google Patents
Method and device for reducing energy consumption by introducing gas into submerged arc furnace Download PDFInfo
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- CN110806113B CN110806113B CN201911162837.5A CN201911162837A CN110806113B CN 110806113 B CN110806113 B CN 110806113B CN 201911162837 A CN201911162837 A CN 201911162837A CN 110806113 B CN110806113 B CN 110806113B
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- 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
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention belongs to the technical field of metallurgy, and particularly relates to a device for reducing energy consumption by introducing gas into a submerged arc furnace. Through carrying out concrete settlement to each part and device, realized the waste flue gas that the hot stove in ore deposit produced of make full use of, let in the flue gas after will handling again in the hot stove in ore deposit, reasonable utilization the energy of hot stove flue gas in ore deposit.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a method and a device for reducing energy consumption by introducing gas into a submerged arc furnace.
Background
In recent decades, the steel industry has been rapidly developed and the demand for ferroalloys has increased. In the production process of the ferroalloy, the continuous reduction of smelting power consumption and the improvement of the utilization efficiency of byproducts become important ways for effectively reducing the production cost of the ferroalloy.
In the production of silicon series, manganese series, chromium series and other ferroalloy products, a carbonaceous reducing agent is generally adopted, and a great amount of CO and CO are generated in the smelting process of a submerged arc furnace2、H2The temperature of the smoke with equal components at the furnace mouth is generally 270-550 ℃, and the smoke contains a large amount of sensible heat. The recoverable waste heat resource is more than 60% of the total waste heat resource. The recycling of the flue gas waste heat mainly has three modes: the first mode is a heat exchange technology, a dividing wall type heat exchanger, a heat storage heat exchanger, a heat pipe heat exchanger or a waste heat boiler is mainly adopted as main equipment, and the recovered flue gas waste heat is used for preheating raw materials and air or generating steam for a smelting process; the second mode is a thermal power conversion technology, high-parameter steam is mainly generated by high-temperature flue gas and then used for high-temperature waste heat power generation, wherein the medium-low temperature flue gas is used for generating low-parameter steam to drag a power machine to do work or is used for organic work circulation to perform low-temperature flue gas waste heat power generation; the third mode is that the recovered flue gas waste heat is used for refrigeration or heating, and the absorption refrigeration and heating technology is mainly utilized to recover the low-temperature flue gas waste heat to provide cold or heat for the environment. However, the utilization rate of the three methods for recycling the waste heat of the flue gas is only 30% at most, and a large amount of waste heat resources are wasted.
The method is characterized in that the flue gas generated by the submerged arc furnace can be introduced into the submerged arc furnace again through a proper position to participate in reaction, so that the purposes of more efficiently utilizing the flue gas and reducing the energy consumption of the submerged arc furnace are achieved.
Disclosure of Invention
The invention aims to provide a method for reducing energy consumption by introducing gas into a submerged arc furnace, so as to solve the problem of low utilization rate of flue gas of the submerged arc furnace in the background art, reduce the energy consumption of the submerged arc furnace and reduce environmental pollution.
In order to solve the technical problems, the invention adopts the following technical scheme:
a device for reducing energy consumption by introducing gas into a submerged arc furnace comprises a gas buffer device, a gas supply device, a submerged arc furnace air inlet device and a flue gas treatment system.
The gas buffer device bag is used for buffering high-flow-rate flue gas treated by the flue gas treatment system, so that relatively stable gas source and pressure can be provided for the submerged arc furnace, and the flue gas can be mixed with gas introduced from the outside in the gas buffer device. The gas buffer device can also temporarily store gas, and the whole device can be ensured to continuously operate.
The gas buffering device comprises two gas joints, two gas buffering tank bodies, a pressure gauge, a safety valve and a water drain valve, wherein the two gas joints are arranged and are all arranged on the top end of each gas buffering tank body, the gas joints are arranged on the side wall of each gas buffering tank body, the pressure gauge is arranged on the top wall of each gas buffering tank body between the two gas joints, the safety valve is arranged on the side wall of each gas buffering tank body, and the water drain valve is arranged on the bottom wall of each gas buffering tank body. Preferably, still be provided with the thermometer outside the gas buffer tank jar body for monitor the internal temperature of gas buffer tank jar, the inside condition of device can real-time supervision to its external manometer and thermometer.
The gas supply device is a high-pressure gas bottle or other devices capable of providing gas, the number of the gas supply devices is two, the gas outlet of one gas supply device is communicated with one gas inlet joint of the gas buffering device, and the gas outlet of the other gas supply device is communicated with the submerged arc furnace gas inlet device.
The submerged arc furnace air inlet device comprises a bent pipe, an air port large sleeve, an air port middle sleeve, an air port small sleeve, an air port, a belly pipe, a cooling water pipe and an air port fixing part; the elbow is communicated with the air outlet joint of the air buffering device and an air outlet of the other air supply device through a three-way valve, the tuyere large sleeve, the tuyere middle sleeve and the tuyere small sleeve are sequentially sleeved, the belly pipe penetrates through the tuyere large sleeve, the tuyere middle sleeve and the tuyere small sleeve, one end of the belly pipe is communicated with the elbow arranged at one end of the tuyere large sleeve, the other end of the belly pipe forms the air port at the end part of the tuyere small sleeve, and the cooling water pipe is arranged in the tuyere small sleeve outside the belly pipe and used for cooling the tuyere small sleeve; the tuyere fixing component is used for communicating the tuyere with the interior of the submerged arc furnace, and is arranged on the upper part of a coke layer of the submerged arc furnace or between the coke layer and a partial molten material layer;
the flue gas treatment system can purify the flue gas of the submerged arc furnace, so that the dust content in the flue gas is reduced to 5mg/m3The following. And the dust removal is carried out step by adopting a method of three-stage (coarse, semi-fine and fine) dust removal and combination of a plurality of dust removal devices. Because the flue gas of the submerged arc furnace is kept at a certain temperature and excessive heat loss is avoided, the conventional bag-type dust remover can be improved by adopting a dry dust removing method.
The flue gas treatment system comprises a dust-containing gas inlet, a cloth bag, a box body and a purified gas outlet; the dust-containing gas inlet is communicated with a flue gas outlet of the submerged arc furnace through a pipeline, the cloth bag is arranged inside the box body, the dust-containing gas inlet is arranged on the side wall of the box body, the purified gas outlet is arranged at the top end of the box body, the cloth bag is arranged inside the box body and is arranged between the dust-containing gas inlet and the purified gas outlet, and the purified gas outlet is communicated with the other gas inlet joint of the gas buffering device through a pipeline.
Preferably, a flexible stirring shaft can be arranged in the cloth bag, so that dust adhered to the cloth bag can be removed, and the cloth bag can be expanded to avoid the influence of the reduction of the cloth bag on the dust removal effect.
Preferably, the gas supply device is in communication with various external gas supply devices.
Preferably, the gas buffer device is further provided with another gas outlet connector, the gas outlet connector is communicated with other submerged arc furnace flue gas utilization equipment, and the other submerged arc furnace flue gas utilization equipment is a dividing wall type heat exchanger, a heat storage heat exchanger, a heat pipe heat exchanger or a waste heat boiler and the like.
The method is carried out by adopting the device for reducing the energy consumption by introducing the gas into the submerged arc furnace, introducing the flue gas generated by the submerged arc furnace into the gas buffering device for buffering after the flue gas is treated by the flue gas treatment system, and then introducing the flue gas into the submerged arc furnace for reaction through the submerged arc furnace air inlet device.
The method is carried out by adopting the device for reducing the energy consumption by introducing the gas into the submerged arc furnace, wherein the flue gas generated by the submerged arc furnace is treated by a flue gas treatment system, then introduced into a gas buffer device, mixed with the gas introduced by a gas supply device and then introduced into the submerged arc furnace through a submerged arc furnace air inlet device for reaction.
The method is carried out by adopting the device for reducing the energy consumption by introducing the gas into the submerged arc furnace, and then the method is adopted to alternately introduce the smoke generated by the submerged arc furnace into the submerged arc furnace through the submerged arc furnace air inlet device and introduce the external gas into the submerged arc furnace through the gas supply device and the submerged arc furnace air inlet device.
The determination of the position of the tuyere holding member has a direct influence on the reaction in the furnace, and taking the ferromanganese alloy production process as an example, it can be experimentally determined that the ore is charged into the submerged arc furnace from the top thereof, and MnO is formed during the gradual heating process2Reaction with CO to Mn3O4There will also be a small amount of MnO next to C in the process2Directly reacting with C; mn produced2O3Continuously reacts with CO to generate Mn3O4While directly reacting with a small amount of C to form Mn3O4(ii) a Mn produced3O4The reaction with CO is continued to generate MnO, and Mn is generated only when the temperature is increased to more than 300-350 DEG C3O4Is directly reduced to MnO by C. When the material layer is lowered to the upper part of the coke layer, the manganese ore is almost completely reduced into MnO, at the moment, a liquid slag phase is generated, and the MnO is dissolved into the slag; MnO dissolved in the slag enters a coke layer to directly react with carbon to generate metal manganese which enters the molten metal. Through the analysis of the reaction in the submerged arc furnace, it can be known that carbon monoxide can participate in the reaction at the upper part of the coke layer of the submerged arc furnace, so that the inlet position of the recycled gas is finally determined to be the top of the coke layer through a large number of experiments, such as the position shown in fig. 5.
For ferromanganese smelting, the overall reaction at the upper part of the coke layer is: MnO2+CO＝MnO+CO2Wherein the CO source is mainly formed by direct reaction of MnO and carbon at the high-temperature discharge position of the electrode. Ideally, the carbon monoxide produced by the lower reaction is just equal to the carbon monoxide required by the upper reaction, so the flue gas component of the submerged arc furnace is mainly carbon dioxide, but actually, the carbon monoxide content is high and reaches 70% -80%, because the carbon dioxide produced by the reaction continues to react with the carbon to produce the carbon monoxide in the rising process. If carbon monoxide can be introduced at the location shown in FIG. 5 (at the upper part of the coke layer of the submerged arc furnace or between the coke layer and the part of the molten material layer), the partial pressure of carbon dioxide and the probability of carbon-carbon contact are reduced, thereby making C + CO2The equilibrium of the 2CO reaction shifts to the left, so that the amount of carbon used can be reduced, and the reaction proceeds to the left as an exothermic reaction, so that energy loss can also be reduced.
The invention has the technical effects that:
the device for reducing the energy consumption by introducing the gas into the submerged arc furnace can utilize the flue gas generated by the submerged arc furnace, and the flue gas contains a large amount of sensible heat, so that the power consumption of the submerged arc furnace can be greatly reduced.
The theoretical value of the flue gas of the submerged arc furnace calculated by material balance is composed of CO according to volume percentage: 48% of CO2:44％，H 24 percent and other 4 percent, but the content of CO is basically about 80 percent by actually measuring the tail gas of the submerged arc furnace, because the carbon dioxide generated by the reaction can continuously react with carbon to generate carbon monoxide in the rising process. The invention reasonably sets the position for introducing the recycled gas, can reduce the partial pressure of the carbon dioxide and the probability of the contact of the carbon dioxide and the carbon, thereby greatly reducing the using amount of the carbon, namely, the position of the tuyere fixing part on the submerged arc furnace is reasonably determined, so that the gas heat can be reused, and more importantly, the using amount of the carbon can be greatly reduced. By arranging the tuyere fixing member at a position above the coke layer, the amount of charged coke is reduced by 5-8% as compared with the prior art.
Through specifically setting up hot stove hot blast inlet unit in ore deposit, set up wind gap major possession, wind gap middle cover, wind gap snare and realize that the multistage carries out the heat protection to hot-blast, avoid causing the loss to the heat at the in-process of blast air, protect the wind gap through setting up the cooling water pipe in the wind gap minor sheath simultaneously to the part service life has also been prolonged.
Drawings
FIG. 1 is a process flow diagram of the method for reducing energy consumption by introducing gas into a submerged arc furnace according to the invention.
FIG. 2 is a schematic view of an air intake device of a submerged arc furnace.
FIG. 3 is a schematic view of a flue gas treatment system.
Fig. 4 is a schematic structural view of the gas buffer device.
FIG. 5 is a schematic sectional view of a furnace chamber in the interior region of a submerged arc furnace.
Wherein: 1-submerged arc furnace, 2-flue gas treatment system, 3-gas buffer device, 4-submerged arc furnace air inlet device, 5-gas supply device, 6-other submerged arc furnace flue gas utilization equipment, 7-gas supply device, 11-electrode, 12-cavity, 13-raw material layer, 14-partial molten material layer, 15-coke layer, 16-slag layer, 17-metal liquid layer, 18-furnace outlet, 19-gas inlet pipe, 21-dust-containing gas inlet, 22-cloth bag, 23-box body, 24-purified gas outlet, 31-first gas inlet joint, 32-second gas inlet joint, 33-first gas outlet joint, 34-second gas outlet joint, 35-gas buffer tank body, 36-pressure gauge, 41-elbow, 42-tuyere large sleeve, 43-tuyere middle sleeve, 44-tuyere small sleeve, 45-tuyere, 46-belly pipe and 47-cooling water pipe.
Detailed Description
Further description is made with reference to the accompanying drawings:
as shown in fig. 1, the main process flow is that the submerged arc furnace flue gas generated by the submerged arc furnace 1 firstly enters the flue gas processing system 2 for dust removal, the flue gas processing system 2 is mainly a bag-type dust remover, then the dedusted submerged arc furnace flue gas enters the gas buffering device 3, the external gas is introduced into the gas buffering device 3 through the gas supply device 5, the submerged arc furnace flue gas in the gas buffering device 3 is mixed with the external gas and then enters the submerged arc furnace through the submerged arc furnace air inlet device 4 for reaction, and the mixed flue gas is used as gas supplement, and simultaneously the external gas directly enters the submerged arc furnace through the gas supply device 7 and the submerged arc furnace air inlet device 4 for reaction.
As shown in fig. 2, the submerged arc furnace air intake device comprises an elbow 41, a tuyere large sleeve 42, a tuyere middle sleeve 43, a tuyere small sleeve 44, a tuyere 45, a belly pipe 46 and a cooling water pipe 47; the elbow is communicated with the gas outlet joint of the gas buffering device and the gas outlet of the other gas supply device through a three-way valve (as shown in fig. 1), the tuyere large sleeve 42, the tuyere middle sleeve 43 and the tuyere small sleeve 44 are sequentially sleeved, the belly pipe 46 penetrates through the tuyere large sleeve 42, the tuyere middle sleeve 43 and the tuyere small sleeve 44, one end of the belly pipe 46 is communicated with the elbow 41 arranged at one end of the tuyere large sleeve 42, the other end of the belly pipe forms the tuyere 45 at the end part of the tuyere small sleeve 44, and the cooling water pipe 47 is arranged in the tuyere small sleeve 44 outside the belly pipe and used for cooling the tuyere small sleeve 44.
As shown in fig. 3, the flue gas treatment system comprises a dust-containing gas inlet 21, a cloth bag 22, a box 23 and a purified gas outlet 24; the dust-containing gas inlet is communicated with a flue gas outlet of the submerged arc furnace through a pipeline, the cloth bag is arranged inside the box body, the dust-containing gas inlet is arranged on the side wall of the box body, the purified gas outlet is arranged at the top end of the box body, the cloth bag is arranged inside the box body and is arranged between the dust-containing gas inlet and the purified gas outlet, and the purified gas outlet is communicated with the other gas inlet joint of the gas buffering device through a pipeline.
As shown in fig. 4, the gas buffer device includes two gas inlets (a first gas inlet 31 and a second gas inlet 32, respectively), two gas outlets (a first gas outlet 33 and a second gas outlet 34, respectively), a gas buffer tank 35, a pressure gauge 36, a safety valve, and a water drain valve, wherein the two gas inlets are disposed at the top end of the gas buffer tank, the gas outlets are disposed on the side wall of the gas buffer tank, the pressure gauge is disposed on the top wall of the gas buffer tank between the two gas inlets, the safety valve is disposed on the side wall of the gas buffer tank, and the water drain valve is disposed on the bottom wall of the gas buffer tank; furthermore, a thermometer can be arranged on the gas buffer tank body, and the thermocouple is communicated with the inside of the gas buffer tank body to measure the internal temperature.
In order to show the position of the gas inlet, the tuyere fixing part is arranged at the position of the upper part of the coke layer, or more specifically between the coke layer and part of the molten material, so that the main gas CO of the recycled gas can be fully utilized by the submerged arc furnace, and the partial pressure of the carbon dioxide can be reduced by the tuyere fixing part arranged at the position, so that excessive reaction of the carbon dioxide with the carbon is avoided, and the use amount of the carbon is greatly reduced.
In this example, the production of high-carbon ferromanganese is taken as an example, the raw materials fed into the furnace are manganese ore and coke, and the heat balance is calculated.
Heat input:
carbon oxidation exothermic:
according to the theoretical average chemical composition of CO 48% and CO 244％、H 24%, the other 4%, thenThe ratio of furnace gas CO in the carbon oxide is as follows:
Thus, the carbon oxidation exotherm is: q1＝(100+139.3)/12×(0.52×110594+0.048×393693)＝4915252kJ。
The other chemical reactions are exothermic:
formation of Mn3C, heat release: q1＝＝60553kJ。
Formation of Fe3C, heat release:
therefore, it is not only easy to use
Slag heat of formation: q3＝284006kJ。
Heat expenditure:
physical heat carried away by the flue gas:
the flue gas temperature is 700 ℃, the ambient temperature is 25 ℃, and the average specific heat capacity of the flue gas is 1.598 kJ/(m)2C.g. to be prepared into a preparation. The amount of carbon entering the flue gas is equal to the amount of carbon oxidized, i.e., 239.3 kg.
Qa＝239.3÷12×22.4÷0.92×1.598×(700-25)＝523724kJ。
Heat taken away by the dust:
the dust content in the flue is 274.3kg, the sensible heat of the dust is 1711kJ/kg, so the method comprises the following steps:
Qb＝1711×174.3＝298227kJ。
the heat expenditure is shown in table 1.
TABLE 1
Before the device is not improved, the electric energy consumption is
3759-(4915252+60553+32075+284006)÷3600＝2289kW·h。
When the treated waste heat flue gas is introduced into the submerged arc furnace again, the heat loss in the process is 20 percent. The heat of the gas introduced is (125.3+21.3+71.3139) × 0.8 × 4.8 × 1000 ═ 836790 kJ.
The electric energy consumption is
3759-(4915252+60553+32075+284006+836790)÷3600＝2059kW·h。
When the waste heat flue gas is reused, the power consumption can be reduced, the calculated energy consumption is reduced by about 10%, the energy consumption obtained through experiments is reduced by about 11-15%, the energy consumption calculated theoretically can be verified, and the energy consumption can be reduced through the arrangement of the invention.
In this example, the amount of the comparative coke charged was reduced by 6% from the previous one by disposing the tuyere holding member at the upper portion of the coke layer.
Claims (8)
1. A device for reducing energy consumption by introducing gas into a submerged arc furnace is characterized by comprising a gas buffer device, a gas supply device, a submerged arc furnace air inlet device and a flue gas treatment system;
the gas buffer device comprises two gas inlets, two gas outlets, a gas buffer tank body, a pressure gauge, a safety valve and a water drain valve, wherein the two gas inlets are arranged at the top end of the gas buffer tank body;
the gas supply device is a high-pressure gas bottle or other devices capable of providing gas, the number of the gas supply devices is two, the gas outlet of one gas supply device is communicated with one gas inlet joint of the gas buffer device, and the gas outlet of the other gas supply device is communicated with the submerged arc furnace gas inlet device;
the submerged arc furnace air inlet device comprises a bent pipe, an air port large sleeve, an air port middle sleeve, an air port small sleeve, an air port, a belly pipe, a cooling water pipe and an air port fixing part; the elbow is communicated with the air outlet joint of the air buffering device and an air outlet of the other air supply device through a three-way valve, the tuyere large sleeve, the tuyere middle sleeve and the tuyere small sleeve are sequentially sleeved, the belly pipe penetrates through the tuyere large sleeve, the tuyere middle sleeve and the tuyere small sleeve, one end of the belly pipe is communicated with the elbow arranged at one end of the tuyere large sleeve, the other end of the belly pipe forms the air port at the end part of the tuyere small sleeve, and the cooling water pipe is arranged in the tuyere small sleeve outside the belly pipe and used for cooling the tuyere small sleeve; the tuyere fixing component is used for communicating the tuyere with the interior of the submerged arc furnace, and is arranged on the upper part of a coke layer of the submerged arc furnace or between the coke layer and a partial molten material layer;
the flue gas treatment system comprises a dust-containing gas inlet, a cloth bag, a box body and a purified gas outlet; the dust-containing gas inlet is communicated with a flue gas outlet of the submerged arc furnace through a pipeline, the cloth bag is arranged inside the box body, the dust-containing gas inlet is arranged on the side wall of the box body, the purified gas outlet is arranged at the top end of the box body, the cloth bag is arranged inside the box body and is arranged between the dust-containing gas inlet and the purified gas outlet, and the purified gas outlet is communicated with the other gas inlet joint of the gas buffering device through a pipeline.
2. The apparatus for reducing energy consumption by introducing gas into a submerged arc furnace according to claim 1, wherein the gas supply apparatus is in communication with various external gas supply apparatuses.
3. The device for reducing energy consumption by introducing gas into a submerged arc furnace as claimed in claim 1, wherein the gas buffering device is further provided with another gas outlet connector, the gas outlet connector is communicated with other submerged arc furnace flue gas utilization equipment, and the other submerged arc furnace flue gas utilization equipment is a dividing wall type heat exchanger, a heat storage heat exchanger, a heat pipe heat exchanger or a waste heat boiler.
4. The apparatus as claimed in claim 1, wherein the tuyere fixing member is a high temperature resistant pipe sleeved with the tuyere, and the high temperature resistant pipe penetrates from the outside of the submerged arc furnace to the inside of the submerged arc furnace.
5. The device for reducing energy consumption by introducing gas into a submerged arc furnace as claimed in claim 1, wherein a vertical rotating shaft is arranged inside each cloth bag of the flue gas treatment system, a plurality of rows of flexible rubber strips are arranged on the outer surface of the vertical rotating shaft, and the flexible rubber strips are in contact with the outer surface of the cloth bag inside the cloth bag through the rotation of the vertical rotating shaft.
6. A method for reducing energy consumption by introducing gas into a submerged arc furnace is characterized in that the method is carried out by adopting the device for reducing energy consumption by introducing gas into the submerged arc furnace, which is disclosed by any one of claims 1 to 5, smoke generated by the submerged arc furnace is treated by a smoke treatment system, then introduced into a gas buffering device for buffering, and then introduced into the submerged arc furnace for reaction through a submerged arc furnace air inlet device.
7. A method for reducing energy consumption by introducing gas into a submerged arc furnace is characterized in that the method is carried out by adopting the device for reducing energy consumption by introducing gas into the submerged arc furnace, which is disclosed by any one of claims 1 to 5, and the flue gas generated by the submerged arc furnace is treated by a flue gas treatment system, introduced into a gas buffering device, mixed with the gas introduced by a gas supply device and introduced into the submerged arc furnace by a submerged arc furnace gas inlet device and reacted.
8. A method for reducing energy consumption by introducing gas into a submerged arc furnace is characterized in that the method is carried out by adopting the device for reducing energy consumption by introducing gas into the submerged arc furnace, which is disclosed in any one of claims 1 to 5, and then the method disclosed in claim 6 or 7 is adopted to alternately introduce the smoke generated by the submerged arc furnace into the submerged arc furnace through the submerged arc furnace gas inlet device and introduce the external gas into the submerged arc furnace directly through the gas supply device and the submerged arc furnace gas inlet device.
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| CN113340112B (en) * | 2021-06-04 | 2023-05-23 | 宁夏昆仑高科硅制品有限公司 | Energy-saving and environment-friendly comprehensive smelting system for silicon-manganese alloy |
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| CN108977601A (en) * | 2017-06-05 | 2018-12-11 | 上海梅山钢铁股份有限公司 | A kind of method of unchoking blast furnace tuyere and iron mouth |
| CN107894173A (en) * | 2017-12-13 | 2018-04-10 | 中冶赛迪工程技术股份有限公司 | A kind of full negative pressure coke stoving process of flue gas self-circulation type and system |
| CN109539805A (en) * | 2018-11-01 | 2019-03-29 | 南京工程学院 | A kind of processing method of soaring kiln gas |
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| CN110806113A (en) | 2020-02-18 |
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