CN201417073Y - Natural gas hot air furnace gas purification cupola furnace - Google Patents
Natural gas hot air furnace gas purification cupola furnace Download PDFInfo
- Publication number
- CN201417073Y CN201417073Y CN2009201032771U CN200920103277U CN201417073Y CN 201417073 Y CN201417073 Y CN 201417073Y CN 2009201032771 U CN2009201032771 U CN 2009201032771U CN 200920103277 U CN200920103277 U CN 200920103277U CN 201417073 Y CN201417073 Y CN 201417073Y
- Authority
- CN
- China
- Prior art keywords
- furnace
- gas
- natural
- forehearth
- natural gas
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
Abstract
The utility model relates to the field of castiron melting equipment, in particular to a natural gas hot air furnace gas purification cupola furnace, which solves the problems in the prior natural gascupola furnace, such as unreasonable distribution of combustion and furnace temperature, serious burn damage to alloy elements, high cost and the like. The cupola furnace comprises a front furnace and a rear furnace communicated through a fire hole, wherein, the front furnace comprises a combustion chamber, a molten pool and a gap bridge, slag discharge ports are formed on the two sides of the molten pool, a shallow molten pool is formed on the gap bridge, slag discharge grooves are formed on the two sides of the gap bridge, the combustion chamber is connected with a natural gas transmissionpipeline and an air supply pipeline connected with a preheat air supply device, the rear furnace comprises a furnace body, a feed port is formed at the upper part of the furnace body, a raised furnacebottom is arranged at the bottom part of the furnace body, a circular flame path is formed between the furnace bottom and the inner wall of the furnace body, the circular flame path is communicated with the fire hole, and a serial type dust removing device is connected to the furnace gas outlet of the rear furnace. The utility model is reasonable in structure, is convenient to operate, costs low,ensures reasonable and uniform combustion of fuel gases, produces a low burn-damage rate among the alloy elements, yields high-temperature quality molten iron, meets the dust emission requirements, and belongs to energy-saving, environment-friendly cast melting equipment.
Description
Technical field
The utility model relates to the casting iron melting equipment field, is specially a kind of natural gas hot blast flue gas cleaning furnace cupola.
Background technology
At present, the most frequently used equipment of Castiron Melting is to be the furnace cupola of fuel with the coke, and along with the development of producing, the coke consumption constantly increases, and the coke demand contradictory is also outstanding day by day.People begin basis fuel source production and supply situation separately, seek the production equipment of burnt melting cast iron of generation.
Known, natural gas is not only the higher energy of calorific value, and the SO of discharging
x, NO
x, CO amount is minimum, also has automatic control, characteristics such as easy to operate, therefore be called as the environmental protection clean energy resource, thereby utilize natural gas melting cast iron also to be paid close attention to by people.China has put into effect " gas utilization policy " in recent years, and particularly the natural gas transfering natural gas from the west to the east is open-minded, provides development space for natural gas is used for furnace cupola.China once designed and used coal dust iron furnace cupola, heavy oil iron furnace cupola, the equivalent burnt smelting equipment of natural gasification iron furnace cupola after the seventies, also its Principle of Melting and production technology are carried out experimental study than system, also obtained some knowhows and theoretical result simultaneously.But for various reasons, so far the natural gas furnace cupola was not done modular in design as yet, to wherein about rationalization burning, molten iron is overheated, the alloying element scaling loss changes and relevant issues such as structural design are not seen ripe report, does not see that also the natural gas furnace cupola that the energy-saving and environmental protection of technology maturation type is arranged using.
Summary of the invention
The utility model exists in order to solve existing natural gas furnace cupola that burning is unreasonable, furnace temperature is not high, irrational distribution and problems such as the alloying element scaling loss is serious, efficiency of dust collection is low, cost height, thereby a kind of efficient, energy-conservation, compliance with environmental protection requirements, manufacturing maintenance, easy and safe to operate are provided, can produce, also can be interrupted the natural gas hot blast flue gas cleaning furnace cupola that taps a blast furnace continuously.
The utility model is to adopt following technical scheme to realize: natural gas hot blast flue gas cleaning furnace cupola, comprise forehearth and back stove, be communicated with by burner between forehearth and the back stove, forehearth comprises the combustion chamber, is opened in the molten bath and the gap bridge between molten bath and burner of bottom, combustion chamber, the both sides, molten bath are respectively equipped with slag-drip opening, and the combustion chamber is connected with natural-gas transfer pipeline and the air supply duct that communicates with it respectively; Back stove comprises body of heater, and upper of furnace body is provided with charge door, and bottom of furnace body is provided with the convex furnace bottom, forms annular quirk between convex furnace bottom and the inboard wall of furnace body, and annular quirk is communicated with burner.
Adopt structural design of the present utility model, molten iron flows to the convex furnace bottom from the fusion zone of back stove, along under the overland flow of furnace bottom, flow into forehearth and pass a bridge through annular quirk, burner, passing a bridge through forehearth flows in whole superheating process in molten bath again, and furnace gas is to flow to low-temperature space from the high-temperature region, and molten iron is to drive in the wrong direction with furnace gas for flowing, rise to high temperature from low temperature, therefore determined the furnace gas temperature distribution of forehearth chamber temperature＞gap bridge temperature＞back ring shape quirk, this is to have best heat exchange condition.Therefore the utility model has been used following molten iron and has been crossed hot mode: utilize convex furnace bottom and annular quirk, and the build molten bath is overheated in gap bridge, in the mode that radiation and convection heat transfer' heat-transfer by convection combine heat is passed to metal bath surface.The effect of the annular quirk in the stove of above-mentioned back is, when high-temperature furnace gas by the combustion chamber through pass a bridge, burner enter after during stove, can realize that furnace gas evenly enters shaft furnace smoothly; And the effect of convex furnace bottom is to guarantee that it is not along the furnace wall motion during stove that high-temperature furnace gas enters the back, but to stove center consolidated movement, has therefore reduced the furnace wall effect, and the furnace gas heat can make full use of, and helps the fusing of furnace charge.When molten iron is melting moved downward, the iron of fusing dripped and can arrive annular quirk along the apparent motion of convex furnace bottom, helps the overheated of molten iron.Under the prerequisite of burning rationally, molten iron flows into the forehearth process from the back stove, the liquid metal surface covers one deck slag naturally, and the thermal conductivity factor of slag is very little, and is very unfavorable to radiant heat transfer, so molten iron is after the gap bridge of flowing through enters the molten bath, molten iron in the molten bath overheated and long-pending full after, the slag meeting overflow of its surface coverage is finally discharged out of the furnace by slag-drip opening to the trough of both sides, molten bath, reaches the purpose of a deslagging.
In order further to optimize the structure of this furnace cupola, improve its function, also comprise following structural design:
Offer the shallow pool on the gap bridge bridge floor of described forehearth, place, arch angle, gap bridge both sides is provided with trough respectively, and trough is communicated with the slag-drip opening of both sides, forehearth molten bath.Along with fusing time increases, furnace gas temperature continues to increase, molten iron temperature descends sometimes on the contrary, its main cause is that slag coating has weakened the radiant heat transfer effect, therefore the utility model has adopted secondary to divide the slag measure, promptly offer the bigger shallow pool of area on the gap bridge before burner, eliminating is from the slag of back stove, after molten iron amasss full in the shallow pool and stops certain hour, the translateral trough of one deck slag that covers is thereon discharged, after slag-drip opening get rid of outside the stove, and the molten iron after separating enter next molten bath continue overheated, thereby can obtain the molten iron of high-temperature stable.
The convex furnace bottom of described back stove is the inversion form of pot bottom of building by laying bricks or stones with fire-resistant coal sand, and this kind shape superheating surface is bigger, and the molten iron time of staying is longer.
Described forehearth is horizontal or vertical structure, and back stove is vertical structure, can be preferred according to actual conditions.
On the described natural-gas transfer pipeline and an end that stretches into the combustion chamber vortex burner is housed, this vortex burner is existing known products, its structure and operation principle are that those of ordinary skill in the art is known.
Described air supply duct one end is connected with the preheating air-supply arrangement that comprises close muscle jet flow heat exchanger and chimney pipe heat exchanger, described preheating air-supply arrangement is existing known configurations, having now with the coke is the furnace cupola extensive use of fuel, mainly be to utilize the waste heat of furnace gas that wind pushing temperature is brought up to more than 250～300 ℃, so both can overheavy firing, fuel savings, can improve the thermal efficiency of stove again.The mode that the preheating air-supply arrangement that the utility model adopted can adopt chimney pipe heat exchanger and close muscle jet flow heat exchanger to be in series also can adopt close muscle jet flow heat exchanger separately.
The valve and the instrument of control, measurement flow and pressure are housed on described natural-gas transfer pipeline and the air supply duct; In the molten bath, gap bridge, annular quirk position be equipped with thermocouple, the charge door place is furnished with the instrument that detects composition of fumes.
The furnace gas export place of described back stove is connected with the string data dust arrester, described string data dust arrester comprises at least two spray equipments, one-level gas-water separation comprehensive dust remover, secondary gas-water separation comprehensive dust remover, sedimentation basin and chimney, spray equipment and the coaxial vertical array of one-level gas-water separation comprehensive dust remover, one-level gas-water separation comprehensive dust remover bottom bottom is connected with sedimentation basin by pipeline, pipeline is passed through at the top, air-introduced machine is connected in series with secondary gas-water separation comprehensive dust remover, secondary gas-water separation comprehensive dust remover bottom is connected with sedimentation basin by pipeline, and top one side is communicated with chimney by pipeline.This structural design mainly is to utilize burner gas residual heat, recirculated water is heated to more than 80 ℃, by string data multi-stage spray device and one-level gas-water separation comprehensive dust remover, air-introduced machine, secondary gas-water separation comprehensive dust remover, sedimentation basin is realized the purpose of udst separation furnace gas, concrete principle is: utilize burner gas residual heat that recirculated water is heated to more than 80 ℃ when doing relative motion with furnace gas, enforceable hot water in the motion is contacted with flue dust in the furnace gas, thereby inertial collision takes place mutually, stop, diffusion, the cohesion of dissolution and hydrone, thereby make flue dust in the furnace gas mutually combine (refer between soot dust granule and the water or between particle and the particle) form bigger particle gradually and soluble in water, thereby be captured, precipitation.This method is consumption of power not, and efficiency of dust collection reaches the standard of national soot emissions up to 98%.
Compared with prior art, the utility model is rational in infrastructure, design ingeniously, easy and simple to handle, floor space is little, fuel gas buring more rationally evenly, change of elements is effectively controlled in the fusion process, and the alloying element burn out rate is low, not only can obtain high temperature high-quality molten iron, and reach the environmental requirement of soot emissions, be a kind of energy saving and environment friendly casting smelting equipment.Can be designed to the series of products of 3～10t/h, cost is low, easy to maintenance, security performance is good, can produce continuously, also can be interrupted and tap a blast furnace, and is specially adapted to the technological transformation of the medium-sized and small enterprises of natural gas resource.The economic and technical norms that the utility model can be realized are:
Molten iron temperature: 〉=1450～1500 ℃; Melting loss of elements rate: Si-10%Mn-15%C-10%S ± 5%P is constant substantially; Fuel consumption: 70～90m
3/ t molten iron; Power consumption: 60～70Kw/t molten iron; Refractory consumption rate: 15Kg/t molten iron; Dust discharge amount:＜150mg/m
3
Description of drawings
Fig. 1 is horizontal structural representation for the utility model forehearth;
Fig. 2 is vertical structural representation for the utility model forehearth;
Fig. 3 structural representation overheated for passing a bridge, that adopt twice minute slag with the molten bath associating.
Among the figure: 1-forehearth, stove behind the 2-, 3-burner, 4-combustion chamber, the 5-molten bath, 6-passes a bridge, 7-natural-gas transfer pipeline, 8-air supply duct, the 9-fire door, the close muscle jet flow of 10-heat exchanger, 11-convex furnace bottom, 12-annular quirk, the 13-charge door, 14-chimney pipe heat exchanger, 15-spray equipment, the 16-sedimentation basin, 17-chimney, 18-one-level gas-water separation comprehensive dust remover, the 19-air-introduced machine, 20-secondary gas-water separation comprehensive dust remover, 21-burner.
The specific embodiment
Natural gas hot blast flue gas cleaning furnace cupola, comprise forehearth 1 and back stove 2, be communicated with by burner 3 between forehearth 1 and the back stove 2, forehearth 1 is horizontal or vertical structure, back stove 2 is vertical structure, as shown in Figure 1, forehearth is a horizontal type structure, it is the combustion chamber, pass a bridge, the molten bath is horizontal structure and arranges, as shown in Figure 2, forehearth is vertical structure, it is the combustion chamber, the molten bath is vertical structural configuration, as shown in Figure 3, forehearth 1 comprises combustion chamber 4, be opened in the molten bath 5 and the gap bridge 6 between molten bath 5 and burner 3 of bottom, combustion chamber, 5 both sides, molten bath are respectively equipped with slag-drip opening, pass a bridge and offer the shallow pool on 6 bridge floors, the place, 6 both sides arches angle of passing a bridge is provided with trough respectively, trough is communicated with the slag-drip opening of 5 both sides, forehearth molten bath, combustion chamber 4 is connected with natural-gas transfer pipeline 7 and the air supply duct 8 that communicates with it respectively, on the natural-gas transfer pipeline 7 and an end that stretches into combustion chamber 4 vortex burner 21 is housed, air supply duct 8 one ends are connected with the preheating air-supply arrangement that comprises close muscle jet flow heat exchanger 10 and chimney pipe heat exchanger 14; Back stove 2 comprises body of heater, upper of furnace body is provided with charge door 13, bottom of furnace body is provided with convex furnace bottom 11, it is the inversion form of pot bottom of building by laying bricks or stones with fire-resistant coal sand, and around it, build the pillar that supports furnace charge with refractory brick, the furnace bottom below is a fire door 9, form annular quirk 12 between convex furnace bottom 11 and the inboard wall of furnace body, annular quirk 12 is communicated with burner 3, the furnace gas export place of back stove 2 is connected with the string data dust arrester, the string data dust arrester comprises three spray equipments 15, one-level gas-water separation comprehensive dust remover 18, secondary gas-water separation comprehensive dust remover 20, sedimentation basin 16 and chimney 17, spray equipment 15 and one-level gas-water separation comprehensive dust remover 18 coaxial vertical array, one-level gas-water separation comprehensive dust remover 18 bottoms bottom are connected with sedimentation basin 16 by pipeline, pipeline is passed through at the top, air-introduced machine 19 is connected in series with secondary gas-water separation comprehensive dust remover 20, secondary gas-water separation comprehensive dust remover 20 bottoms are connected with sedimentation basin 16 by pipeline, and top one side is communicated with chimney 17 by pipeline.
The utility model is equipped with control, measures the valve and the instrument of flow and pressure on natural-gas transfer pipeline 7 and air supply duct 8; In the molten bath 5, pass a bridge 6, annular quirk 12 positions are equipped with thermocouple, charge door 13 places are furnished with the instrument that detects composition of fumes.In running,, in time each parameter is adjusted, guaranteed the rational position of furnace, temperature rise speed and highest temperature zone, thereby guarantee burning rationally and obtain high temperature liquid iron according to the data of instrument reaction.According to practical proof, adopt furnace cupola of the present utility model, realize rationalization burning, must satisfy following 3 points, (1) furnace characteristics must satisfy: i.e. forehearth chamber temperature＞gap bridge temperature＞back ring shape fire path temperature; When the furnace temperature trend was stablized, forehearth combustion chamber maximum temperature was answered＞1850 ℃; Gap bridge temperature＞1780 ℃; Back ring shape fire path temperature＞1550 ℃; (2) temperature rise speed: temperature rise speed should reach igniting back 30～40min, and the forehearth chamber temperature should be increased to more than 1650 ℃, and the first iron clad coolant-temperature gage of seeing iron that feeds intake should be more than 1400 ℃; (3) rational position of highest temperature zone: the space that the position of highest temperature zone should be positioned at forehearth combustion chamber molten iron upper surface maybe this place is delayed to the space of gap bridge front end slightly.
In order to realize controlling and reducing the scaling loss of element, the applicant by analysis, the reason that causes natural gas furnace cupola melting loss of elements mainly is that the furnace gas direct oxidation of high temperature oxidation stability atmosphere causes Si, Mn scaling loss, and slag composition and slag iron time of contact also are the principal elements of melting loss of elements.Furnace gas temperature is high more, and when air excess or mixing were uneven, the scaling loss of Fe, Si, Mn enlarged markedly.The FeO composition increases in the slag, slag iron is long more time of contact, and the scaling loss of Fe, Si, Mn also enlarges markedly, therefore, the applicant thinks that the measure of control minimizing alloying element scaling loss mainly is that the control high-temperature furnace gas should be weak oxide atmosphere, must rational Application gas wind ratio be vital.Secondly adopt secondary to divide slag at the gap bridge position, remove the oxide in the slag, can significantly reduce the scaling loss of C, Si, Mn.According to the composition of fumes of instrument measurement, the major parameter of combustion gas, air is the important means of control, adjustment, minimizing content melting loss of elements.
Claims (8)
1, a kind of natural gas hot blast flue gas cleaning furnace cupola, it is characterized in that comprising forehearth (1) and back stove (2), be communicated with by burner (3) between forehearth (1) and the back stove (2), forehearth (1) comprises combustion chamber (4), be opened in the molten bath (5) of bottom, combustion chamber and be positioned at molten bath (5) and burner (3) between gap bridge (6), both sides, molten bath (5) are respectively equipped with slag-drip opening, and combustion chamber (4) are connected with natural-gas transfer pipeline (7) and the air supply duct (8) that communicates with it respectively; Back stove (2) comprises body of heater, and upper of furnace body is provided with charge door (13), and bottom of furnace body is provided with convex furnace bottom (11), forms annular quirk (12) between convex furnace bottom (11) and the inboard wall of furnace body, and annular quirk (12) is communicated with burner (3).
2, natural gas hot blast flue gas cleaning furnace cupola according to claim 1, it is characterized in that offering the shallow pool on gap bridge (6) bridge floor of forehearth (1), place, arch angle, gap bridge (6) both sides is provided with trough respectively, and trough is communicated with the slag-drip opening of both sides, forehearth molten bath (5).
3, natural gas hot blast flue gas cleaning furnace cupola according to claim 1 and 2 is characterized in that the convex furnace bottom (11) of back stove (2) is the inversion form of pot bottom of building by laying bricks or stones with fire-resistant coal sand.
4, natural gas hot blast flue gas cleaning furnace cupola according to claim 1 and 2 is characterized in that forehearth (1) is horizontal or vertical structure, and back stove (2) is vertical structure.
5, natural gas hot blast flue gas cleaning furnace cupola according to claim 1 and 2 is characterized in that natural-gas transfer pipeline (7) goes up and stretch into an end of combustion chamber (4) vortex burner (21) is housed.
6, natural gas hot blast flue gas cleaning furnace cupola according to claim 1 and 2 is characterized in that air supply duct (8) one ends and comprises the preheating air-supply arrangement of close muscle jet flow heat exchanger (10) with chimney pipe heat exchanger (14) and be connected.
7, natural gas hot blast flue gas cleaning furnace cupola according to claim 1 and 2, valve and the instrument of it is characterized in that control is housed on natural-gas transfer pipeline (7) and the air supply duct (8), measuring flow and pressure; Thermocouple is equipped with in (5), gap bridge (6), annular quirk (12) position in the molten bath, and charge door (13) locates to be furnished with the instrument that detects composition of fumes.
8, natural gas hot blast flue gas cleaning furnace cupola according to claim 1 and 2, the furnace gas export place that it is characterized in that back stove (2) is connected with the string data dust arrester, described string data dust arrester comprises at least two spray equipments (15), one-level gas-water separation comprehensive dust remover (18), secondary gas-water separation comprehensive dust remover (20), sedimentation basin (16) and chimney (17), spray equipment (15) and the coaxial vertical array of one-level gas-water separation comprehensive dust remover (18), one-level gas-water separation comprehensive dust remover (18) bottom bottom is connected with sedimentation basin (16) by pipeline, pipeline is passed through at the top, air-introduced machine (19) is connected in series with secondary gas-water separation comprehensive dust remover (20), secondary gas-water separation comprehensive dust remover (20) bottom is connected with sedimentation basin (16) by pipeline, and top one side is communicated with chimney (17) by pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201032771U CN201417073Y (en) | 2009-06-11 | 2009-06-11 | Natural gas hot air furnace gas purification cupola furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201032771U CN201417073Y (en) | 2009-06-11 | 2009-06-11 | Natural gas hot air furnace gas purification cupola furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201417073Y true CN201417073Y (en) | 2010-03-03 |
Family
ID=41793496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201032771U Expired - Fee Related CN201417073Y (en) | 2009-06-11 | 2009-06-11 | Natural gas hot air furnace gas purification cupola furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201417073Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102679350A (en) * | 2012-05-11 | 2012-09-19 | 王林海 | Gas and oxygen mixed combustion method for cupola furnace and cupola furnace |
| CN102735053A (en) * | 2012-07-16 | 2012-10-17 | 盐边县福川机械制造有限公司 | LF (low frequency) furnace device, and method for processing molten iron of blast furnace |
| CN104457215A (en) * | 2014-09-28 | 2015-03-25 | 刘建平 | Method for preparing high-temperature molten iron by fusing casting pigs |
| CN109163556A (en) * | 2018-11-09 | 2019-01-08 | 上海杜邦龙机电有限公司吕四分公司 | A kind of energy saving and environment friendly Multi-functional smelting furnace |
| CN109945639A (en) * | 2019-03-22 | 2019-06-28 | 重庆气体压缩机厂有限责任公司 | A kind of furnace cupola and its renovation technique |
-
2009
- 2009-06-11 CN CN2009201032771U patent/CN201417073Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102679350A (en) * | 2012-05-11 | 2012-09-19 | 王林海 | Gas and oxygen mixed combustion method for cupola furnace and cupola furnace |
| CN102679350B (en) * | 2012-05-11 | 2016-06-01 | 王林海 | A kind of method of combustion gas for furnace cupola and oxygen mix burning and furnace cupola |
| CN102735053A (en) * | 2012-07-16 | 2012-10-17 | 盐边县福川机械制造有限公司 | LF (low frequency) furnace device, and method for processing molten iron of blast furnace |
| CN104457215A (en) * | 2014-09-28 | 2015-03-25 | 刘建平 | Method for preparing high-temperature molten iron by fusing casting pigs |
| CN104457215B (en) * | 2014-09-28 | 2016-09-14 | 刘建平 | A kind of method that melting iron block prepares high temperature iron liquid |
| CN109163556A (en) * | 2018-11-09 | 2019-01-08 | 上海杜邦龙机电有限公司吕四分公司 | A kind of energy saving and environment friendly Multi-functional smelting furnace |
| CN109945639A (en) * | 2019-03-22 | 2019-06-28 | 重庆气体压缩机厂有限责任公司 | A kind of furnace cupola and its renovation technique |
| CN109945639B (en) * | 2019-03-22 | 2020-04-24 | 重庆气体压缩机厂有限责任公司 | Cupola furnace and repairing process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201417073Y (en) | Natural gas hot air furnace gas purification cupola furnace | |
| CN202660889U (en) | Liquid deslagging high-temperature oriented silicon steel walking beam type slab heating furnace | |
| CN208472140U (en) | A kind of steelmaking equipment made steel with steel scrap | |
| CN103673592B (en) | The method and system of the combustion gas of a kind of preheating, sintering, igniting stove in parallel and combustion air | |
| CN101608793A (en) | Air and gas double heat accumulating type burner | |
| CN201225620Y (en) | Air single thermal storage combustor | |
| CN101294770A (en) | Crucible furnace for alloy melting and heat preservation | |
| CN110530152B (en) | Metal melting system with annular hot gas insulation layer and metal melting process | |
| CN115159812A (en) | Large-scale energy-saving glass melting furnace adopting electric main melting | |
| CN101440417A (en) | Tube furnace-high furnace duplex coal-based smelting reduction ironmaking method | |
| CN212688113U (en) | Reducing gas heating furnace for producing sponge iron by gas-based reduction | |
| CN113354257A (en) | Energy-saving environment-friendly direct-heating type external preheating glass melting furnace and production method thereof | |
| CN111424128B (en) | Reducing gas heating furnace and heating process for producing sponge iron by gas-based reduction | |
| CN108624739A (en) | A kind of steelmaking equipment and smelting process with steel scrap steel-making | |
| CN107902870B (en) | Energy-saving kiln for environment-friendly unit glass wool | |
| CN101093140A (en) | Heat storage type vertical metal magnesium reducing furnace | |
| CN201676997U (en) | Single heat accumulating type forging heating furnace for burning hot dirty coal gas | |
| CN201121160Y (en) | Glass pool furnace | |
| CN104141019B (en) | Modification method of iron-containing slag and special equipment for modification method | |
| CN204724842U (en) | A kind of online ladle accumulation of heat roaster | |
| CN101020967A (en) | Heat accumulating horizontal magnesium reducing furnace | |
| CN208071568U (en) | A kind of environmental unit mineral wool energy saving kiln | |
| CN201225619Y (en) | Air and coal gas double-thermal storage type combustor | |
| CN206073702U (en) | A kind of smelting furnace | |
| CN205907282U (en) | Gas melting furnace with jetting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100303 Termination date: 20120611 |