CN206724695U - A kind of fuel gas buring and electric arc combined heat smelting furnace - Google Patents
A kind of fuel gas buring and electric arc combined heat smelting furnace Download PDFInfo
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- CN206724695U CN206724695U CN201621195874.8U CN201621195874U CN206724695U CN 206724695 U CN206724695 U CN 206724695U CN 201621195874 U CN201621195874 U CN 201621195874U CN 206724695 U CN206724695 U CN 206724695U
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Abstract
The utility model discloses a kind of fuel gas buring and electric arc combined heat smelting furnace, including the body of heater on furnace foundation is located at, body of heater includes side wall, furnace roof and the refractory-lined ovens bottom being located on furnace foundation；The burner hearth of body of heater is divided into fusion zone and the part of decanting zone two；Decanting zone furnace bottom is less than fusion zone furnace bottom, and fusion zone furnace bottom is designed using tilting and one end adjacent with decanting zone tilts down and communicated with decanting zone；In fusion zone, the furnace roof away from decanting zone one end is provided with charging aperture；Burner is provided with relative both walls in fusion zone；The graphite electrode through furnace roof is provided with decanting zone, the outlet for slag discharge and the outlet for thermal state metal discharge are respectively equipped with the bottom of decanting zone.The utility model combines fuel gas buring heating and the advantage of electric arc heated, the defects of avoiding the two, it is incubated in decanting zone using electric arc heated auxiliary as fuel using combustion gas in fusion zone and completes drastic reduction, production cost is greatly reduced, product quality and smelting efficiency are high.
Description
Technical field
It the utility model is related to a kind of smelting furnace, more particularly to a kind of fuel gas buring and electric arc combined heat smelting furnace, category
In melting furnace field.
Background technology
Generally use blast furnace and electric furnace etc. realize the slag sluicing system of ferrous material at present.Blast furnace is a kind of upright type of furnace, is fitted
For handling acid pellet or sintering deposit, and need to also be using coke as raw material, when being smelted iron using it, there is Technological Economy
Index is good, and technique is simple, and output is big, and labor productivity is high, low power consumption and other advantages, but there is also to entering stove thing for blast furnace
The requirement of material is high, need to use the higher shortcoming such as low with efficiency of energy utilization of coking coal, energy consumption；Electric furnace is that the electric energy in stove is converted into
Heat has furnace atmosphere to be easily controlled the heating furnace of workpiece heat, its advantage, and material heating is fast, and heating-up temperature is high, produces
Journey is easier to realize mechanization and automation, and labour health condition is good, and the thermal efficiency is high, good product quality, and more environmentally-friendly, but electric furnace
Similarly there is it is obvious the shortcomings that, as controller switching equipment is costly, power cost is high and should be noted insulation the problems such as.
Patent No. ZL200810079930.5 Chinese utility model patent provides a kind of side of smelting iron in arc furnace
Method and device, smelting furnace part include body of heater 2, bell 10, charging (feeding) equipment and discharging equipment, and molten iron outflow port is arranged at the bottom of body of heater 2
9.There are three electrode jacks 12 on bell 10, insert electrode 1 respectively, each of three electrodes jack is in triangular distribution.Body of heater 2 is outer a pair
Heating furnace 5a, 5b and a pair of storage heaters 6a, 6b, two heating furnace relative positions are arranged on the both sides outside body of heater 2.Heating furnace passes through
Connector 4 is connected with the body of heater 2 of electric arc furnaces, and gas can flow back and forth in connector.Storage heater 6a, 6b one end and heating furnace
Connection, the other end are connected with air blower 8 and exhaust system respectively.Heating furnace is provided with burner, combustion air pipeline and fuel conduit
It is connected to burner.Four tunnels of the outlet of air blower 8 point, are connected with two heating furnaces and two storage heaters respectively, and valve is housed per road
Door.The fuel conduit being connected with heating furnace and it is also equipped with valve on the exhaust pipe road being connected with storage heater.Two heating furnaces
Alternate combustion fuel and bubbing, two storage heater alternating accumulation of heats and heat release.Bubbing is that metal ferriferous oxide reduced
Caused gas in journey, wherein containing substantial amounts of CO, H2.The heat storage 7 of the storage heater is ceramic ball body.The body of heater of electric arc furnaces
And bell is steel construction.The body of heater 2 and bell 10, it is tightly connected between electrode 1 and bell 10 for water collar.Electric arc furnaces is equipped with
Pressure air defense valve 11 is used as explosion-protection equipment；Major defect present in the electric arc furnaces is as follows：
(1) in melting burner hearth, on the one hand because thermal current in heating furnace or even flame enter in smelting furnace burner hearth directly
Graphite electrode is blown, it will wash away electrode material and cause consumption of electrode to accelerate；Another aspect thermal current is in smelting furnace row
The stop of electrode is run on inbound path, it will cause the disorder of air-flow.
(2) a large amount of gases will be produced in the metal oxide reduction process, it is unavoidable to produce a large amount of foamed slags,
The thermal current that these foamed slags enter smelting furnace burner hearth after floating through heating furnace drives and will made with Airflow obstruction ventilation shaft
It is not smooth into producing.
(3) in heating furnace mainly by the bubbing in smelting furnace as combustion gas, its growing amount with material and coal,
The change of the proportionings such as coke has very great fluctuation process, causes the unstability of burning, influences the control of in-furnace temperature.Due to combustible gas
Body is uncontrollable in amount, is likely to result in explosion accident.
(4) fuel gas is burnt with combustion air in heating furnace, rather than is directly carried out in smelting furnace burner hearth
Burning, unavoidably causes thermal loss, the not high of heat utilization ratio
Patent No. ZL201020682060.3 Chinese utility model patent discloses a kind of gas heat accumulating type melting furnace,
Including calciner 1, holding furnace 10.The burner hearth bottom of calciner 1 is higher than the burner hearth bottom of holding furnace 10, the burner hearth bottom of calciner 1
Portion is connected by skewed slot 11 with the burner hearth bottom of holding furnace 10.A set of burner is respectively equipped with calciner 1 and holding furnace 10；
After aluminium liquid in calciner 1 is concentrated thawing, the inside holding of holding furnace 10 is flowed into through skewed slot 11, all using combustion in two burner hearths
Gas combustion heating.Major defect present in the gas heat accumulating type melting furnace is as follows：
(1) there is the shortcomings that combustion gas smelting furnace is intrinsic, it is low using radiant heat transfer, the thermal efficiency, it is difficult to higher molten bath is realized,
Bed utilization rate is low, it is difficult to realizes large-scale.
(2) it is mainly for the melting of aluminium ingot, and adaptability to raw materials is narrower, when the larger material of processing dregginess, due to molten
Slag will be floated over above metal liquid phase, and slag thermal conductivity itself is very poor, it will greatly stop heat from burner hearth to metal phase
Conduction, thermal state metal is caused to be deteriorated with slag contacts surface mass-and heat-transfer, it is most likely that to cause thermal state metal to be separated with slag tired
Difficulty, and produce the situation of metal recovery rate reduction so that productivity effect is bad.
Application No. 200910075372.X Chinese utility model patent discloses a kind of heat storage type electric arc furnace melting refining
The device of iron, including electric arc furnace body 4, electrode 2, bell 1) and match equipment, charging (feeding) equipment and discharging equipment, 2~8
Combustion chamber 11a, 11b) and 2~8 storage heaters 12a, 12b, heat storage 13 is housed in storage heater)；One end of the storage heater with
Combustion chamber connect, the other end respectively with exhaust system and air blower 14) be connected, described device is additionally provided with 2~8 coal gasification casees
9a, 9b, are provided with 1~10 layer of coal grid 10 between electric arc furnace body and combustion chamber, in coal gasification case, coal grid built with
Coal dust or lump coal or honeycomb briquette, the top of coal gasification case are provided with the socket of coal grid；The coal gasification case is provided with bypass 5, coal gas
Outlet, entrance and the bypass for changing case are provided with valve 6.Major defect present in the device of the heat storage type electric arc furnace deoxy iron-smelting is such as
Under：
(1) still using electrode as heating element heater, therefore its energy consumption is still higher；
(2) fail to realize that using different fusing separate modes, therefore the utilization ratio of the energy is not in different fusing sections
It is high.
Utility model content
Main purpose of the present utility model is to provide a kind of fuel gas buring and electric arc combined heat smelting furnace, the fuel gas buring
It is suitable for iron ore, lateritic nickel ore, vanadium titano-magnetite, metallurgical dust, metallurgical slag, nonferrous smelting with electric arc combined heat smelting furnace
Slag and after direct-reduction ferrous material slag sluicing system, have melting cost is low, environment-friendly, product quality is high, stove
The advantages that monomer treating capacity is big, adaptability to raw materials is wide, the rate of recovery is high.
Above-mentioned purpose of the present utility model is mainly achieved through the following technical solutions：
A kind of fuel gas buring and electric arc combined heat smelting furnace, including the body of heater on furnace foundation is located at, body of heater includes side
Wall, furnace roof and refractory-lined ovens bottom composition；It is divided into fusion zone and decanting zone two from the partition wall that furnace roof extends downwardly by the burner hearth of body of heater
Individual part, partition wall lower end and refractory-lined ovens bottom are at regular intervals, it is allowed to which the fluid melted in fusion zone flows to decanting zone；Wherein, sink
Drop area's furnace bottom is less than fusion zone furnace bottom, and fusion zone furnace bottom is designed using tilting, and one end adjacent with decanting zone tilts down
And communicated with decanting zone；In fusion zone, the furnace roof away from decanting zone one end is provided with charging aperture；The relative both walls in fusion zone
It is provided with burner；The graphite electrode through furnace roof is provided with decanting zone, is respectively equipped with the bottom of decanting zone and is discharged for slag
Slag exit and for thermal state metal discharge thermal state metal outlet.
It is further preferred that 500~700mm of spacing of the partition wall lower end and fusion zone refractory-lined ovens bottom.Thus, ensuring
While entering the melting of stove material and mobility requirement, fusion zone and decanting zone can also be separated, to realize that different zones melt
The accurate control of refining condition and atmosphere, to reach preferable smelting technology and product index.
As a kind of preferable structure of the present utility model, in described decanting zone, relative both sides are arranged symmetrically two
Fusion zone；The furnace bottom angle of inclination of fusion zone ensures that the material after fusing can flow to partition wall direction, so as to most between 3-5 °
Decanting zone is entered eventually.Decanting zone is run through on furnace roof graphite electrode and graphite electrode bottom is located on the furnace bottom of decanting zone,
Graphite electrode is inserted into molten bath, is incubated using electric arc heated and is completed drastic reduction, ensures the final of slag and thermal state metal
Separation.
It is further preferred that the refractory material of the decanting zone is neutral refractory；
It is further preferred that the refractory material of the fusion zone bottom is acid refractory, the fire resisting on fusion zone upper strata
Material is neutral refractory；It is highly preferred that fusion zone upper strata refractory material is low grade carborundum (containing SiC about 85%)
Fire resistant materials；It is further preferred that the thickness and upper strata neutral refractory of the fusion zone bottom acid refractory
Thickness ratio be (5~10)：1.Because low grade carborundum (containing SiC about 85%) is fabulous deoxidier, thus, upper strata fire resisting
Material can accelerate the speed of melting and reduction, be advantageous to improve the molten quality for dividing metal product, while bottom refractory material can be really
The resistance corroded at high temperature acidic materials is protected, and reasonably controls the cost of bottom refractory.
As the preferable structure of another kind of the present utility model, it is located at for the slag exit of slag discharge in decanting zone
Portion, the thermal state metal outlet for thermal state metal discharge is located at the bottom of decanting zone, and two outlets are respectively positioned on fusion zone furnace bottom most
Under low side.
As the preferable structure of another kind of the present utility model, heat accumulating type combustion is provided with relative both walls in fusion zone
Burner, heat-storage type burner alternate blowing flame combustion, using material in high temperature conduction heating fusion zone, material starts softening simultaneously
Ultimately form flowable melt.Fusion zone furnace bottom is designed using tilting, ensure flowable melt to fusion zone and decanting zone it
Between partition wall side flowing.Opening is left below partition wall, ensures that melt is entered in decanting zone.The fusion zone uses combustion gas
Melting materialss are heated with the mixed combustion of high temperature combustion air, decanting zone is entered using graphite electrode heating fusing separation metal and slag
Preferably, the combustion gas is fuel gas with low heat value to one step；It is highly preferred that the fuel gas with low heat value is coal gas, blast furnace gas and Jiao
Producer gas etc..Thus, the utility model can use fuel gas with low heat value as fuel, and this will significantly reduce production cost, and raising pair
The adaptability of fuel type.
Described heat-storage type burner includes burner, regenerator, air blower, flue, gas pipeline, flue gas and air
Common conduit, four-way reversing valve and air-introduced machine；Multiple burners are relative respectively to be located on the wall of described fusion zone opposite sides,
Burner is provided with gas pipeline, the top connection of burner and regenerator.
Preferably, the side wall of the body of heater, furnace roof and furnace foundation are built into using refractory material and refractory brick.
Preferably, Copper Water Jacket is being cooled down built in the refractory material of side wall and furnace roof.
The utility model fuel gas buring with electric arc combined heat smelting furnace compared with existing melting furnace, it is most important
Difference is：
(1) the whole smelting furnace of the utility model is divided into fusion zone and the part of decanting zone two, and decanting zone furnace bottom will be less than molten
Change area's furnace bottom, communicated below fusion zone with decanting zone.
(2) both ends side wall relative in the utility model fusion zone is provided with heat-storage type burner, is fired using low heat value
Gas and high temperature combustion air mixed combustion heating solid material.Furnace bottom is in symmetrical in the relative both sides in described decanting zone in the area
Arrangement, and tilting designs, it is low close to decanting zone side, it is heated in the flow direction of material decanting zone after fusing.(3) this practicality is new
The decanting zone of type fuel gas buring and electric arc combined heat smelting furnace is run through on furnace roof graphite electrode, graphite electrode insertion molten bath
It is middle be incubated and complete drastic reduction using electric arc heated, finally complete the separation of thermal state metal and slag in decanting zone, slag and
Thermal state metal passes through slag exit and thermal state metal outlet discharge respectively.
(4) whole smelting furnace side wall, furnace roof and the stove of the utility model fuel gas buring and electric arc combined heat smelting furnace
Basis is built into using refractory material and refractory brick, wherein Copper Water Jacket is provided with inside smelting furnace side wall and furnace roof fire resisting material,
Protect refractory material；The refractory material bottom of fusion zone furnace bottom and upper strata use unlike material, and its thickness is in certain proportion, this
The speed of melting and reduction can not only be accelerated, be advantageous to improve the molten quality for dividing metal product, the used time can also rationally control resistance to
The cost of fiery material.
Main beneficial effect of the present utility model includes：
(1) set using body of heater subregion, be respectively equipped with and interconnect two fusion zones for still having partition wall and a sedimentation
Area, the accurate control of fusion zone and decanting zone melting condition and atmosphere can be achieved.In fusion zone melting materialss, it is incubated in decanting zone
Complete the separation of thermal state metal and slag in molten bath.The fusing for being primarily due to solid material usually requires consumption fusing gross energy
More than 80%, so providing heat using heat-storage type burner combustion gas in fusion zone, melting cost is greatly reduced, is kept away
Exempt to be used as main heating source using the expensive power energy (electric arc).And furnace bottom is designed using tilting in the area, after material melting
It flow in decanting zone, the less height of bed of material holding (<500mm), the defects of avoiding fuel gas buring from heating poor thermal conduction.Its
It is secondary in decanting zone by institute's calorific requirement is less, using electric arc heated, ensure that higher melt pool height, improve smelting furnace monomer
Yield, avoid the defects of fuel gas buring heated molten bath is highly difficult to improve.
(2) regenerative combustion technology, the first high-temperature air combustion promoter using temperature more than 1000 DEG C are used, is greatly dropped
Low gas consumption, smoke discharge amount substantially reduce, improve melting in-furnace temperature (>1600 DEG C), exhaust gas temperature is reduced to
Less than 250 DEG C, thermal efficiency height.Using low heat value (<3000Kcal/m3) coal gas, coal gas, it is particularly possible to it is low using price
It is honest and clean, industrially for the coal resources such as lignite jet coal without value as coal gas raw material, its cost is the 50% of electricity price lattice
It is even lower.
(3) avoid using the fuel combustions such as coke heating in fusion zone, it is harmful miscellaneous so as to be caused to final products
The pollution of prime element.Follow-up refining cost is greatly reduced, improves value-added content of product.
(4) fusion zone bottom refractory uses hierarchical design, and upper strata uses low grade carborundum, and bottom is using acid resistance to
Fiery material, this can not only accelerate the speed of melting and reduction, be advantageous to improve the molten quality for dividing metal product, moreover it is possible to ensure in height
The resistance that acidic materials are corroded under temperature, and can reasonably control the cost of bottom refractory.
(5) it is suitable for iron ore, lateritic nickel ore, vanadium titano-magnetite, metallurgical dust, metallurgical slag, nonferrous smelting slag and warp
The slag sluicing system of ferrous material after direct-reduction, raw material use range is wide, and the rate of recovery is high.
In a word, the utility model has closed the advantages of fuel gas buring melting furnace is with electric arc heated smelting furnace, avoids this
The shortcomings that two kinds of smelting furnaces.The relatively thin bed of material is used in fusion zone, ensures fuel gas buring heat transfer efficiency, is grasped in decanting zone mining height molten bath
Make, improve smelting furnace monomer yield；In fusion zone using combustion gas as fuel, in decanting zone using electric arc heated auxiliary insulation
And drastic reduction is completed, by controlling the melting condition and atmosphere of fusion zone and decanting zone, production cost is greatly reduced, and can obtain
To the metal product that metal in the dreg content is lower, thermal state metal grade is higher, melting cost reduces, and smelting efficiency improves, product
Quality is good, environment-friendly, there is very high practical value.
Brief description of the drawings
Fig. 1 fuel gas burings provided by the utility model and electric arc combined heat smelting furnace schematic diagram；
Fig. 2 the utility model fuel gas buring and heat-storage type burner contained in electric arc combined heat smelting furnace；
Heat-storage type burner fundamental diagram after Fig. 3 commutations.
Description of reference numerals：1- furnace foundations, 2- refractory material furnace bottoms, 3- body of heater side walls, 4- partition walls, 5- furnace roofs, 6- chargings
Mouthful, 7- slag exits, the outlet of 8- thermal state metals, the burner of 9- heat-storage type burners, 10- regenerator, 10a, 10b- heat storage,
11- air blowers, 12- flues, 13a, 13b- gas pipeline, 14- graphite electrodes, 15- fusion zones, 16- decanting zones, 17- are solid
State material, 18- molten baths, 19a, 19b- flue gas and air common conduit, 20- four-way reversing valves, 21- flue gas processing devices, 22-
Air-introduced machine.
Embodiment
With reference to figure 1, the utility model provides a kind of fuel gas buring and electric arc combined heat smelting furnace, including furnace foundation 1,
Refractory material furnace bottom 2, the body of heater side wall 3 being built into by refractory brick and refractory material of built-in cooling Copper Water Jacket, positioned at fusion zone 15
Partition wall 4 between decanting zone 16, the furnace roof 5 above burner hearth, the charging aperture 6 above the furnace roof 5 of fusion zone 15, it is located at
The slag exit 7 of the lower section of decanting zone 16 is with thermal state metal outlet 8, the heat-storage type burner on the opposite sides wall of fusion zone 15
Burner 9, heat storage 10a, 10b inside regenerator 10, air blower 11, flue 12, gas pipeline 13a, 13b, be placed in
The graphite electrode 14 of the furnace roof of decanting zone 16；It is divided into fusion zone 15 with sinking from the partition wall 4 that furnace roof 5 extends downwardly by the burner hearth of body of heater
16 two, area part is dropped, and fusion zone 15 is arranged symmetrically in the both sides of decanting zone 16, and the furnace bottom of fusion zone 15 is higher than the stove of decanting zone 16
Bottom.The furnace bottom of fusion zone 15 uses tilting furnace bottom, and furnace bottom angle of inclination can be flowed between 3-5 ° with the material after ensureing to melt
To partition wall direction, so as to enter eventually into decanting zone 16.Solid material 17 is put into fusion zone 15 by charging aperture 6, is being melted
The heat-storage type burner alternate blowing flame combustion of opposite sides, low using coal gas, blast furnace gas, coke-stove gas etc. in area 15
Material in high temperature conduction heating fusion zone 15 caused by calorific value fuel gas burning, material start to soften and ultimately formed flowable molten
Body.The furnace bottom of fusion zone 15 is designed using tilting, ensures flowable melt to the partition wall 4 one between fusion zone 15 and decanting zone 16
Side is flowed, and the spacing of the lower end of partition wall 4 and refractory-lined ovens bottom is 500~700mm, and opening is left below partition wall 4, ensures that melt enters
Into decanting zone 16.The refractory material of the bottom of fusion zone 15 is acid refractory, during the refractory material on the upper strata of fusion zone 15 is
Property refractory material；The thickness of the bottom acid refractory of fusion zone 15 and the thickness ratio of upper strata neutral refractory be 5~
10：1.In decanting zone 16, by the molten bath 18 of the melt composition liquid constantly entered from fusion zone 15, in decanting zone 16, furnace roof passes through
Graphite electrode 14 is installed with, graphite electrode 14 is inserted into molten bath 18, is incubated using electric arc heated and is completed drastic reduction, is ensured molten
The final separation of slag and thermal state metal.Slag after separation is discharged by slag exit 7, and thermal state metal exports 8 rows by thermal state metal
Go out.
The operation principle of regenerative combustion technology is that the combustion gas that low cost is relied primarily in fusion zone 15 is burnt,
By regenerative combustion technology, in-furnace temperature can be up to more than 1600 DEG C in the state of amount of consumed gas is relatively fewer.
Heat-storage type burner primary structure is as shown in Fig. 2 including being arranged in fusion zone with respect to burner 9, regenerator 10 on side wall, regenerator
Interior heat storage 10a, 10b, gas pipeline 13a, 13b, flue gas and air common conduit 19a, 19b, four-way reversing valve 20, cigarette
Feed channel 12, flue gas processing device 21, air blower 11, air-introduced machine 22.
Fig. 3 shows the operation principle of heat-storage type burner, and when right side burner combustion, arrow represents that air-flow is walked in way
To.Cold conditions air enters after four-way reversing valve 20 to enter by flue gas and air common conduit 19a via air blower is provided with accumulation of heat
Body 10a regenerator, now heat storage 10a be in the condition of high temperature, for temperature up to more than 1000 DEG C, main material can be honeycomb
The high refractory material of the heat exchange efficiency such as body and Ceramic Balls.Cold conditions air is exchanged heat when passing through heat storage 10a with heat storage, cold
State air is heated to form the high temperature air that temperature is up to 1000 DEG C, and regenerator temperature then gradually reduces.Now gas pipeline
13a is in open mode, and 13b is closed.Pass through after being pre-mixed by the combustion gas that gas pipeline 13a enters with high temperature air
Burner 9, which is injected in fusion zone 15, to be burnt, and ignition temperature can reach more than 1600 DEG C.Due to the effect of air-introduced machine 22,
High-temperature flue gas in the internal furnace of fusion zone 15 is entered in the regenerator provided with heat storage 10b by drainage, and now heat storage 10b is in
Temperature is compared with low state, and for temperature below 500 DEG C, its material is identical with preceding addressed heat storage 10a.Out of fusion zone 15 burner hearth
The high-temperature flue gas of entrance carries out the heat exchange of high-temperature flue gas and heat storage, heat storage is gradually added by the heat storage 10b of low temperature
Heat is to more than 1000 DEG C, and high-temperature flue gas is cooled to less than 250 DEG C, is changed by flue gas and air common conduit 19b and four-way
Enter flue 12 after to valve 20, air is discharged into after flue gas processing device 21.After certain time, gas pipeline first
13a is closed, and four-way reversing valve 20 commutates afterwards, and operation principle is as shown in figure 3, the cold conditions air blasted by air blower 11 passes through
Enter flue gas and air common conduit 19b after four-way reversing valve 20, enter afterwards in the regenerator provided with heat storage 10b, by
Heat storage 10b has been heated to more than 1000 DEG C before four-way reversing valve 20 commutates, cold conditions air pass through after heat storage 10b with
It exchanges heat, and cold conditions air, which is heated to 1000 DEG C or so, turns into high temperature air, and heat storage 10b is then gradually cooled down.Now
Gas pipeline 13b is opened, and combustion gas starts to burn after mixing with high temperature air, and combustion flame temperature can be up to more than 1600 DEG C.
Due to the effect of air-introduced machine 22, the high-temperature flue gas in the burner hearth of fusion zone 15 is entered in the regenerator provided with heat storage 10a, before
The heat storage 10a that the temperature reduces is exchanged heat with high-temperature flue gas, and heat storage is gradually heated to more than 1000 DEG C, and high temperature
Flue gas is then gradually cooled as it passes through the cooler to less than 250 DEG C, by after four-way reversing valve 20 after by flue 12, in flue gas processing device
21 be cleaned after discharge.As described above, the regenerator burner alternation of left and right two, four-way reversing valve 20, gas pipeline
13a, 13b etc. use Automated condtrol.Arrangement of the regenerator burner on the side wall of fusion zone 15 is also used and is in tilted layout, slope
Degree is consistent with the furnace bottom of fusion zone 15, is ensured that burner 9 keeps optimum distance with material, is improved heat conduction efficiency.
Embodiment one
A kind of fuel gas buring and electric arc combined heat smelting furnace, including furnace foundation 1, refractory material furnace bottom 2, built-in cooling copper
The body of heater side wall 3 being built into by refractory brick and refractory material of water jacket, the partition wall 4 between fusion zone and decanting zone, positioned at stove
Furnace roof 5 above thorax, the charging aperture 6 above the furnace roof 5 of fusion zone 15, slag exit 7 and heat positioned at the lower section of decanting zone 16
State metal outlet 8, the storage inside the burners 9 of 5 groups of heat-storage type burners on the opposite sides wall of fusion zone 15, regenerator 10
Hot body 10a, 10b, air blower 11, flue 12, gas pipeline 13a, 13b, it is placed in the graphite electrode 14 of decanting zone furnace roof.
Smelting furnace can be divided into fusion zone 15, decanting zone 16, and fusion zone is arranged symmetrically in decanting zone both sides, fusion zone stove
Bottom is higher than decanting zone furnace bottom.Solid material 17 is put into fusion zone 15 by charging aperture 6, the opposite sides in fusion zone 15
Heat-storage type burner alternate blowing flame combustion, using coal gas burn caused by material in high temperature conduction heating fusion zone 15,
Material starts to soften and ultimately form flowable melt.
In the furnace bottom of fusion zone 15, designed using tilting, its angle design is 3 °, ensures flowable melt to fusion zone 15
The side of partition wall 4 flowing between decanting zone 16, the lower section of partition wall 4 are 500mm apart from the spacing of the furnace bottom of fusion zone 15, molten to ensure
Body is entered in decanting zone 16.The refractory material of the bottom of fusion zone 15 is acid refractory, the fire proofed wood on the upper strata of fusion zone 15
Expect for neutral refractory, and the thickness of the bottom acid refractory of fusion zone 15 and the thickness ratio of upper strata neutral refractory are
5：1.
In decanting zone 16, by the molten bath 18 of the melt composition liquid constantly entered from fusion zone 15, in the stove of decanting zone 16
Through there is graphite electrode 14, graphite electrode 14 is inserted into molten bath 18, is incubated using electric arc heated and is completed drastic reduction on top, is protected
The final separation of slag and thermal state metal is demonstrate,proved, the slag after separation is discharged by slag exit 7, and thermal state metal is exported by thermal state metal
8 discharges, obtain the metal product that metal in the dreg content is lower, thermal state metal grade is higher.
Certain iron ore is obtained into the roasting that degree of metalization is 88% after " dispensing-rotary hearth furnace direct-reduction " PROCESS FOR TREATMENT to produce
Product, it is hot to direct plunge into fuel gas buring of the present utility model and handled in electric arc combined heat smelting furnace, control fusion zone
Temperature is 1400 DEG C, atmosphere is weak oxide atmosphere, and decanting zone temperature is 1550 DEG C, atmosphere is reducing atmosphere, can finally be obtained
The product that iron content to the molten Iron grade 97.91% for dividing iron, slag is 2.71%, it, which melts, divides iron Iron grade and rate of recovery index equal
Higher than common smelting furnace more than 1%.
Embodiment two
A kind of fuel gas buring and electric arc combined heat smelting furnace, its structure are as shown in Figure 1：Including furnace foundation 1, refractory material
Furnace bottom 2, the body of heater side wall 3 being built into by refractory brick and refractory material of built-in cooling Copper Water Jacket, positioned at fusion zone and decanting zone it
Between partition wall 4, the furnace roof 5 above burner hearth, the charging aperture 6 above the furnace roof 5 of fusion zone 15, positioned at the lower section of decanting zone 16
Slag exit 7 and thermal state metal outlet 8, the burner 9 of 3 groups of heat-storage type burners on the opposite sides wall of fusion zone 16,
Heat storage 10a, 10b inside regenerator 10, air blower 11, flue 12, gas pipeline 13a, 13b, are placed in decanting zone stove
The graphite electrode 14 on top.
Smelting furnace can be divided into fusion zone 15, decanting zone 16, and fusion zone 15 is arranged symmetrically in the both sides of decanting zone 16, fusing
The furnace bottom of area 15 is higher than the furnace bottom of decanting zone 16.Solid material 17 is put into fusion zone 15 by charging aperture 6, the phase in fusion zone 15
To the heat-storage type burner alternate blowing flame combustion of both sides, high temperature conduction heating fusion zone caused by blast furnace gas combustion is utilized
Interior material, material start to soften and ultimately form flowable melt.
In the furnace bottom of fusion zone 15, designed using tilting, its angle design is 4 °, ensures flowable melt to fusion zone 15
The side of partition wall 4 flowing between decanting zone 16, the lower section of partition wall 4 are 600mm apart from the spacing of the furnace bottom of fusion zone 15, molten to ensure
Body is entered in decanting zone 16.The refractory material of the bottom of fusion zone 15 is acid refractory, the fire proofed wood on the upper strata of fusion zone 15
Expect for low grade carborundum (containing SiC about 85%) material, and the low product of thickness and upper strata of the bottom acid refractory of fusion zone 15
The thickness ratio of level carborundum is 8：1.
In decanting zone 16, by the molten bath 18 of the melt composition liquid constantly entered from fusion zone 15, in the stove of decanting zone 16
Through there is graphite electrode 14, graphite electrode 14 is inserted into molten bath 18, is incubated using electric arc heated and is completed drastic reduction on top, is protected
The final separation of slag and thermal state metal is demonstrate,proved, the slag after separation is discharged by slag exit 7, and thermal state metal is exported by thermal state metal
8 discharges, obtain the metal product that metal in the dreg content is lower, thermal state metal grade is higher.
Certain copper smelting slag is obtained into the roasting that degree of metalization is 80% after " dispensing-rotary hearth furnace direct-reduction " PROCESS FOR TREATMENT
Product is burnt, hot to direct plunge into fuel gas buring of the present utility model and handled in electric arc combined heat smelting furnace, control is molten
Change area's temperature is 1450 DEG C, atmosphere is weak oxide atmosphere, and decanting zone temperature is 1600 DEG C, atmosphere is reducing atmosphere, finally
The molten Iron grade 96.85% for dividing iron can be obtained, the product that the iron content of slag is 2.09%, it, which melts, divides iron Iron grade and the rate of recovery to refer to
Mark is above common smelting furnace more than 2%.
Embodiment three
A kind of fuel gas buring and electric arc combined heat smelting furnace, its structure are as shown in Figure 1：Including furnace foundation 1, refractory material
Furnace bottom 2, the body of heater side wall 3 being built into by refractory brick and refractory material of built-in cooling Copper Water Jacket, positioned at fusion zone 15 and decanting zone
Partition wall 4 between 16, the furnace roof 5 above burner hearth, the charging aperture 6 above the furnace roof 5 of fusion zone 15, positioned at decanting zone
The slag exit 7 of 16 lower sections exports 8 with thermal state metal, 1 group of heat-storage type burner on the opposite sides wall of fusion zone 15
Heat storage 10a, 10b inside burner 9, regenerator 10, air blower 11, flue 12, gas pipeline 13a, 13b, it is heavy to be placed in
The graphite electrode 14 of the furnace roof 5 of area 16 drops.
Smelting furnace can be divided into fusion zone 15, decanting zone 16, and fusion zone 15 is arranged symmetrically in the both sides of decanting zone 16, fusing
The furnace bottom of area 15 is higher than the furnace bottom of decanting zone 16.Solid material 17 is put into fusion zone 15 by charging aperture 6, the phase in fusion zone 15
To the heat-storage type burner alternate blowing flame combustion of both sides, using coke-stove gas burn caused by high temperature conduction heating fusion zone
Interior material, material start to soften and ultimately form flowable melt.
In the furnace bottom of fusion zone 15, designed using tilting, its angle design is 5 °, ensures flowable melt to fusion zone 15
The side of partition wall 4 flowing between decanting zone 16, the lower section of partition wall 4 are 700mm apart from the spacing of the furnace bottom of fusion zone 15, molten to ensure
Body is entered in decanting zone 16.The refractory material of the bottom of fusion zone 15 is acid refractory, the fire proofed wood on the upper strata of fusion zone 15
Expect for for low grade carborundum (containing SiC about 85%) material, and the thickness of the bottom acid refractory of fusion zone 15 and upper strata are low
The thickness ratio of grade carborundum is 10：1.
In decanting zone 16, by the molten bath 18 of the melt composition liquid constantly entered from fusion zone 15, in the stove of decanting zone 16
Through there is graphite electrode 14, graphite electrode 14 is inserted into molten bath 18, is incubated using electric arc heated and is completed drastic reduction on top, is protected
The final separation of slag and thermal state metal is demonstrate,proved, the slag after separation is discharged by slag exit 7, and thermal state metal is exported by thermal state metal
8 discharges, obtain the metal product that metal in the dreg content is lower, thermal state metal grade is higher.
Certain lateritic nickel ore is obtained into the roasting that degree of metalization is 80% after " dispensing-rotary hearth furnace direct-reduction " PROCESS FOR TREATMENT
Product, hot to direct plunge into fuel gas buring of the present utility model and handled in electric arc combined heat smelting furnace, control fusing
Area's temperature is 1500 DEG C, atmosphere is oxidizing atmosphere, and decanting zone temperature is 1600 DEG C, atmosphere is weak reducing atmosphere, finally may be used
Obtain nickel content 20.63%, the high-grade nickel iron product of iron content 76.71%, its nickel grade higher than it is common it is molten divide stove 2% with
On.
Claims (10)
1. a kind of fuel gas buring and electric arc combined heat smelting furnace, including the body of heater on furnace foundation (1) is located at, body of heater includes side
Wall (3), furnace roof (5) and refractory-lined ovens bottom (2) composition, it is characterised in that：
It is divided into fusion zone (15) and the part of decanting zone (16) two from the partition wall (4) that furnace roof (5) extends downwardly by the burner hearth of body of heater；
Wherein, decanting zone (16) furnace bottom is less than fusion zone furnace bottom；
Fusion zone (15) furnace bottom is designed using tilting, and one end adjacent with decanting zone (16) tilts down and and decanting zone
(16) communicate；The furnace bottom angle of inclination of the fusion zone (15) is between 3-5 °；
In fusion zone (15), the furnace roof away from decanting zone (16) one end is provided with charging aperture (6)；Relative two in fusion zone (15)
Side wall is provided with burner；
The graphite electrode (14) through furnace roof is provided with decanting zone (16), is respectively equipped with the bottom of decanting zone (16) and is arranged for slag
The slag exit (7) gone out and the thermal state metal outlet (8) for thermal state metal discharge.
2. fuel gas buring according to claim 1 and electric arc combined heat smelting furnace, it is characterised in that partition wall (4) lower end
It is at regular intervals with refractory-lined ovens bottom, it is allowed to which that the fluid of fusing flows to decanting zone (16) in fusion zone (15).
3. fuel gas buring according to claim 1 and electric arc combined heat smelting furnace, it is characterised in that in described sedimentation
The relative both sides in area (16) are arranged symmetrically two fusion zones (15).
4. fuel gas buring according to claim 3 and electric arc combined heat smelting furnace, it is characterised in that the fusion zone
(15) thickness ratio of the thickness of bottom acid refractory and upper strata neutral refractory is 5~10：1.
5. fuel gas buring according to claim 1 and electric arc combined heat smelting furnace, it is characterised in that for slag discharge
Outlet is positioned at the middle and upper part of decanting zone (16), and the outlet for thermal state metal discharge is located at the bottom of decanting zone (16), and two go out
Mouth is respectively positioned under fusion zone (15) furnace bottom least significant end.
6. fuel gas buring according to claim 1 and electric arc combined heat smelting furnace, it is characterised in that in fusion zone (15)
Interior relative both walls are provided with heat-storage type burner.
7. fuel gas buring according to claim 1 and electric arc combined heat smelting furnace, it is characterised in that decanting zone (16) exist
Running through on furnace roof has graphite electrode (14), and graphite electrode (14) bottom is located on decanting zone (16) furnace bottom.
8. fuel gas buring according to claim 1 and electric arc combined heat smelting furnace, it is characterised in that fusion zone (15) are adopted
Melting materialss are heated with the mode of combustible gas burning, decanting zone (16) use graphite electrode (14) heating and thermal insulation, so as to realize
The separation of metal and slag.
9. fuel gas buring according to claim 1 and electric arc combined heat smelting furnace, it is characterised in that the side of the body of heater
Wall (3), furnace roof (5) and furnace foundation (1) are built into using refractory material and refractory brick.
10. fuel gas buring according to claim 9 and electric arc combined heat smelting furnace, it is characterised in that in side wall (3) and
The built-in cooling Copper Water Jacket of the refractory material of furnace roof (5).
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| CN201621195874.8U CN206724695U (en) | 2016-10-28 | 2016-10-28 | A kind of fuel gas buring and electric arc combined heat smelting furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106643145A (en) * | 2016-10-28 | 2017-05-10 | 江苏省冶金设计院有限公司 | Fuel gas combustion and electric arc combined heating smelting furnace |
| CN109373758A (en) * | 2018-10-19 | 2019-02-22 | 张淑芳 | A kind of recuperative heater |
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2016
- 2016-10-28 CN CN201621195874.8U patent/CN206724695U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106643145A (en) * | 2016-10-28 | 2017-05-10 | 江苏省冶金设计院有限公司 | Fuel gas combustion and electric arc combined heating smelting furnace |
| CN109373758A (en) * | 2018-10-19 | 2019-02-22 | 张淑芳 | A kind of recuperative heater |
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