CN201327293Y

CN201327293Y - Melting furnace

Info

Publication number: CN201327293Y
Application number: CNU200820106138XU
Authority: CN
Inventors: 武志坚
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-09-29
Filing date: 2008-09-29
Publication date: 2009-10-14
Anticipated expiration: 2018-09-29

Abstract

The utility model relates to a melting furnace, which comprises a furnace body, a nozzle combustion heater and a regenerative heat exchanger, wherein, a hearth is arranged in the furnace body; and a molten pool is arranged below the hearth. The melting furnace is characterized in that the bottom part of the molten pool sinks downwards; a discharging passage is formed at the bottom part of the molten pool; a discharging groove is formed on a front wall of the furnace body; the discharging passage is communicated with the discharging groove; the nozzle combustion heater is obliquely mounted on a back wall of the furnace body and opposite to the molten pool; the nozzle combustion heater is formed by sleeving an inner high-pressure air tube, a gas tube and a ventilation tube; the regenerative heat exchanger has a steel housing; the steel housing is divided into a left box body, a middle box body and a right box body; firebrick piles which are formed by firebricks and used for energy storage are arranged in the three box bodies; and a ventilation device is arranged on the regenerative heat exchanger; and a scavenging valve and a steering device are arranged on the ventilation device. The melting furnace which uses a gold flame industrial gas to heat and melt metals or metallic ores has the advantages of low heating cost and short heat melting period.

Description

A kind of melting furnace

Technical field

The utility model relates to the particularly melting furnace of iron and steel of a kind of melting furnace.

Background technology

Existing melting furnace particularly iron and steel melting furnace mostly is the coking furnace fusing greatly, the coking furnace molten metallic material, and the thermal efficiency is low, and contaminated environment, generally melt one ton of cast iron, need 0.35 ton coke, about 1000 yuan of existing market valencys, the melting cost height, the fusing cycle is long.What have uses furnace melting, and furnace melting power consumption is big, melts one ton of cast iron, and power consumption reaches about 1000 degree, about 500 yuan of existing market valencys.

Summary of the invention

In order to overcome the above-mentioned deficiency of existing melting furnace, the utility model provides a kind of combustion gas melting furnace, and with this melting furnace deposite metal raw material or metallic ore, the heat fused cost is low.

The utility model arrives particularly cast iron of metal to the expanded range of fusing after the technology of the patent No. 200410012326.2 " a kind of glass melts heating means and glass thawing furnace thereof " is improved.The technical scheme of taking is the raw material that is melted that flame directly is sprayed onto the melting tank in the melting furnace with golden flame industrial combustion gas and nozzle combustion heater.

" a kind of glass melts heating means and glass thawing furnace thereof " of the patent No. 200410012326.2 can't be used for particularly melting iron of deposite metal with the golden flame industrial combustion gas of cutting metal with existing metal molten stove, for golden flame industrial combustion gas and nozzle combustion heater are applied to melting iron, must seek new melting furnace.

The design of this melting furnace is that golden flame industrial combustion gas and 5 to 8 atmospheric pressure-air input nozzle combustion heaters are jetted out flames, and the input air of ventilator longitudinally by the setting of nozzle combustion heater, the interior Gas Pipe of cooling jet combustion heater, with nozzle combustion heater flame directly be sprayed onto in the smelting furnace in the molten bath the molten metal ingot of wanting or metallic ore or nonmetal raw material.Ingot in the molten bath or metallic ore or nonmetal raw material are all melted.The fusing back is emitted molten metal liquid or nonmetal liquid by blow tank, flows in the ladle with fire-resistant heat insulating material liner.In order to improve the thermal efficiency, in fusion process, the high-temp waste gas (1300 ℃-1500 ℃) of burner hearth after a casing of regenerative heat exchanger carries out heat exchange to reduce the temperature of waste gas (being reduced to 150 ℃-180 ℃) is discharged, the usefulness air blast after another casing of regenerative heat exchanger heats up, is imported burner hearth to air simultaneously.First casing exhaust in the casing of two ventilations of regenerative heat exchanger, second casing are to the burner hearth air feed, and every certain hour, the first casing is to the burner hearth air feed, and the exhaust of second casing is taken turns to burner hearth air feed and waste discharge gas.

This melting furnace comprises the fire-resistant brick body of heater of usefulness, nozzle combustion heater and a regenerative heat exchanger, at body of heater charge door and muck removal mouth and blow tank are being set, charge door is arranged on side wall of furnace, burner hearth is arranged in body of heater, and the reinforced road of charge door through tilting communicates with burner hearth, and the molten bath of using electric smelting brick is being set under the burner hearth, it is characterized in that: the bottom in molten bath is to recessed, one discharging road is arranged at the bottom of the molten bath, and blow tank is arranged on the preceding bulkhead of body of heater, and the other end in discharging road communicates with blow tank; The nozzle combustion heater tilts to be installed in the back bulkhead of body of heater and faces toward the molten bath; Said nozzle combustion heater is the nozzle combustion heater that three pipes are nested, and an end of nozzle combustion heater is jet end, and the other end is an inlet end, and the nozzle combustion heater mainly is made of interior Gas Pipe, inner high voltage tracheae and ventilator; In the Gas Pipe, interval is radially arranged between inner high voltage tracheae and the interior Gas Pipe in the inner high voltage tracheae is through, interior Gas Pipe is through in the ventilator, and interval is radially arranged between interior Gas Pipe and the ventilator; Interior Gas Pipe and inner high voltage tracheae are 200mm-400mm apart from ventilator in the distance of jet end, the other end bending of interior Gas Pipe reaches outside the ventilator as the through hole of gas kitchen pipe joint from the ventilator side, welding is air tight between interior Gas Pipe and this through hole, the other end bending of inner high voltage tracheae reaches outside the ventilator from the through hole of interior Gas Pipe side and the through hole of ventilator side as the high-pressure air pipe joint, and welding is air tight between two through holes of this of inner high voltage tracheae and interior Gas Pipe and ventilator; The inner high voltage tracheae provides oxygen for the golden flame industrial combustion gas of interior Gas Pipe, and the other end of the ventilator of nozzle combustion heater is an inlet end, and the function of ventilator is the interior Gas Pipe of cooling when providing oxygen to combustion gas from interior Gas Pipe outside; Said regenerative heat exchanger has a steel plate shell, cushions asbestos board in the inboard of steel plate shell, is separated into left box body, middle casing and right case in steel plate shell, is adorning the refractory brick of being made up of the refractory brick heap that is used for accumulation of energy in three casings respectively; Refractory brick layering in casing laminates placement, piles up up and down together at vertical direction refractory brick, overlap together before and after the horizontal direction, about to together; Refractory brick is cuboid, and the through hole that distributing on the refractory brick in left box body and right case has minimum two legs on the surface of refractory brick, and making between the adjacent refractory brick in front and back has at interval, is convenient to the circulation of gas; Refractory brick is to erect to be placed in the casing, makes through hole become horizontal direction; In steel plate shell four through holes are being set, at left box body two through holes are being set, at right case two through holes are being set, gas for the ease of the refractory brick heap mixes, between the two ends of the refractory brick of left box body heap and steel plate shell, have at interval, between the two ends of the refractory brick heap of right case and steel plate shell, have at interval; Left box body links near the through hole of body of heater one end and a body of heater scavenge trunk of body of heater setting, and right case links near the through hole of body of heater one end and another body of heater scavenge trunk of body of heater setting, and the other end of two body of heater scavenge trunks communicates with burner hearth; The through hole of the other end of left box body is connecting a scavenge trunk, and the through hole of the right case other end is connecting another root scavenge trunk; Regenerative heat exchanger is disposing air regenerating device, and air regenerating device has scavenging air valve, steering gear; Scavenging air valve has the valve casing of a circle, two scavenge trunks that connect with regenerative heat exchanger are connected in the corresponding both sides of scavenging air valve respectively, scavenging air valve is also connecting exhaust tube and air inlet pipe, and the air inlet of exhaust tube and the gas outlet of air inlet pipe are separately positioned on the corresponding both sides of scavenging air valve; The steering gear of control valve plate is installed on the valve casing of scavenging air valve, and steering gear has a rotating shaft, and the rotating shaft of steering gear reaches in the valve casing, is fixing valve plate in the rotating shaft in reaching valve casing, and steering gear can be by the time interval rotational valve plate of setting; During certain position, valve plate place, scavenging air valve connects a body of heater scavenge trunk logical with air inlet pipe, simultaneously exhaust tube is connected logical with another body of heater scavenge trunk, when position that valve plate turns an angle, scavenging air valve connects exhaust tube logical with a body of heater scavenge trunk, simultaneously another body of heater scavenge trunk is connected logical with air inlet pipe.

This melting furnace is to dispose air feed equipment and air exhauster use, and air feed equipment has air compressor and two air blasts, and the gas outlet of air compressor connects with the high-pressure air pipe joint of nozzle combustion heater through high-pressure air pipe; The gas outlet of an air blast connects logical with the inlet end of the ventilator of nozzle combustion heater, the gas outlet of another air blast connects with the air inlet of the air inlet pipe of commutator; The air inlet of air exhauster connects with the gas outlet of exhaust tube.Several fuel gas bottle are set during use, and the gas outlet of fuel gas bottle connects through the gas kitchen pipe joint of Gas Pipe with the nozzle combustion heater.

During use, air exhauster is extracted into a casing of regenerative heat exchanger to waste gas from burner hearth, and the heat of waste gas is passed to regenerative heat exchanger, has reduced the temperature of the waste gas of extracting out, is convenient to the air exhauster workpiece.Air blast is defeated by the burner hearth air to air through another casing of regenerative heat exchanger simultaneously, when air process regenerative heat exchanger, draws the waste heat of regenerative heat exchanger, has improved the temperature of the air that enters burner hearth, has utilized the waste heat of waste gas.Regularly change the wind direction that enters regenerative heat exchanger as required by scavenging air valve.Casing is after the waste gas heat absorption, and every certain hour, the conversion wind direction stops from burner hearth air-breathingly, and air enters burner hearth after this casing heat absorption when this casing, and another casing is from stopping air feed in burner hearth, the useless heat that absorbs in the burner hearth.

The utility model is the directly raw material heating to being melted of the environmental protection typed gold flame industrial combustion gas burned flame that is used for cutting metal, as cast iron, iron ore, copper ingot are directly heated, sufficient combustion, the pernicious gas that burning back produces is few, and the molten metal harmful substance that brings after the fusing is few.More outstanding is to adopt the combustion gas heating, and production process mainly is an air blast electric power, reduces the consumption of electric energy, and the heating expense is low.Low, the no black smoke of gold flame industrial combustion gas radiation, the pernicious gas of discharging is little; Be difficult for decomposition explosion, be convenient to transportation and store; Combustion flame temperature is up to more than 3300 ℃, and heat time heating time is short, and the fusing cycle is short, reduces the loss of heat.Melting cost is low, melts one ton of cast iron cost and is lower than 100 yuan.Obviously can be much lower with fusing than with coke.Compare with " a kind of glass melts heating means and glass thawing furnace thereof ", improved the nozzle combustion heater and set up regenerative heat exchanger.Change three jet pipes into by double venturi, the golden flame of industry fully mixes with pressure-air in the ventilator of nozzle combustion heater front end, improved combustion rate, temperature in the burner hearth is higher 100 ℃ than " a kind of glass melts heating means and glass thawing furnace thereof ", obviously the combustion gas of saving has reduced the pollution of waste gas.The internal combustion air pipe sleeve Gas Pipe in the ventilator cooling, makes the continual and steady work of nozzle combustion heater energy, satisfies the particularly requirement of melt iron ore of fusing refractory metal in the ventilator of nozzle combustion heater.Reduce the temperature of the waste gas of discharging by regenerative heat exchanger, improved the temperature of the air that enters burner hearth, improved the utilization rate of heat energy.The utility model golden flame industrial combustion gas by the cutting metal processed and applied in the deposite metal, for new purposes has been started in new high-quality combustion gas.

Description of drawings

Fig. 1 is the front view of this melting furnace embodiment one.

Fig. 2 is and the corresponding vertical view of Fig. 1.

Fig. 3 is and the corresponding rearview of Fig. 1.

Fig. 4 is the cutaway view along A-A line among Fig. 2.

Fig. 5 is the office's cutaway view along D-D line among Fig. 4.

Fig. 6 is the cutaway view along B-B line among Fig. 1.

Fig. 7 is the partial sectional view along C-C line among Fig. 1.

Fig. 8 is the partial sectional view along E-E line among Fig. 1.

Fig. 9 is the compound mode front view of heat accumulating element, and Fig. 1 amplifies relatively.

Figure 10 is and the corresponding vertical view of Fig. 9 that Fig. 1 amplifies relatively.

Figure 11 is the longitudinal sectional view of twin-jet nozzle combustion heater, and Fig. 1 amplifies relatively.

Figure 12 is the structure chart of flow switch, and Fig. 1 amplifies relatively.

Figure 13 is the structure chart of flow switch, and Fig. 1 amplifies relatively, the relative Figure 12 half-twist of valve plate.

Figure 14 is the vertical view of this melting furnace embodiment two.

Figure 15 is the cutaway view along E-E line among Figure 14,90 ° of dextrorotation.

Among the above-mentioned figure:

1, fuel gas bottle 2, Gas Pipe 3, air exhauster 4, exhaust tube 5, pipe joint

6, scavenging air valve 7, steering gear 8, scavenge trunk 9, air inlet pipe

10, air blast 11, nozzle combustion heater 12, Gas Pipe 13, valve

14, regenerative heat exchanger 15, peep hole 16, body of heater 17, charge door

18, muck removal mouth 19, plug 20, discharging cell body 21, support

22, air blast 23, ground 24, scavenge trunk 25, high-pressure air pipe

26, blow tank 27, valve 28, air compressor 29, inclined hole

30, back bulkhead 31, furnace roof 32, burner hearth 33, preceding bulkhead

34, at the bottom of molten bath 35, the molten bath 36, furnace base 37, discharging road

38, box hat 39, sidewall 40, body of heater scavenge trunk 41, body of heater scavenge trunk

42, plug 43, reinforced road 44, interval 45, steel plate shell

46, asbestos board 47, refractory brick heap 48, left box body 49, at interval

50, interval 51, middle casing 52, refractory brick heap 53, right case

54, refractory brick heap 55, steel plate 56, interval 57, refractory brick

58, through hole 59, leg 60, refractory brick 61, refractory brick 62, leg

63, ventilator 64, high-pressure air pipe joint 65, inner high voltage tracheae

66, interior Gas Pipe 67, pole 68, pole 69, gas kitchen pipe joint

70, rotating shaft 71, valve plate 72, valve casing 73, body of heater 74, charge door

75, muck removal mouth 76, discharging cell body 77, blow tank 78, burner hearth 79, molten bath

The specific embodiment

Below in conjunction with embodiment and accompanying drawing thereof this melting furnace is described in detail, but the specific embodiment of this melting furnace is not limited to following embodiment.

Melting furnace embodiment one

The melting furnace that Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 6 describe comprises a fire-resistant brick body of heater 16 of usefulness, the body of heater 16 of present embodiment is being provided with two charge doors 17 and muck removal mouth 18 and blow tank 26, charge door 17 is arranged on two sidewalls 39 of body of heater, at sidewall 39 peep hole 15 is arranged, burner hearth 32 is arranged in the body of heater 16, the reinforced road 43 of charge door 17 through tilting communicates with burner hearth 39, burner hearth is being provided with for 39 times uses the brick molten bath of electric smelting 34, the length in molten bath 34 is 1.5m, wide 1.5m, dark 1m, during melting iron, capacity is 5 tons.For the ease of the molten metal after going out to melt, the bottom in molten bath is to recessed, 35 are taper at the bottom of the molten bath of present embodiment, 35 minimum point has a discharging road 37 at the bottom of the molten bath, blow tank 26 is arranged on the preceding bulkhead 33 of body of heater 16, the other end in discharging road 37 communicates with blow tank 26, and the grooved of blow tank 26 is a V-arrangement, referring to Fig. 5.The back bulkhead 30 of body of heater 16 is installed with a nozzle combustion heater 11, and nozzle combustion heater 11 tilts to be installed in the vertical line of symmetry of back bulkhead 30 facing to molten bath 34, and facing to fusing face.Can block charge door 17 and muck removal mouth 18 with plug 42 and plug 19 respectively as required, referring to Fig. 8.

Nozzle combustion heater 11 is critical components of the present utility model.In conjunction with Figure 11 the structure for example explanation nozzle combustion heater 11 of the present utility model is described.Nozzle combustion heater 11 is nozzle combustion heaters that three pipes are nested, and an end of nozzle combustion heater is jet end, and nozzle combustion heater 11 mainly is made of with ventilator 63 interior Gas Pipe 66, inner high voltage tracheae 65.In the Gas Pipe 66, interval is radially arranged between inner high voltage tracheae 65 and the interior Gas Pipe 66 in inner high voltage tracheae 65 is through, interior Gas Pipe 66 is through again in the ventilator 63, and interval is radially arranged between interior Gas Pipe 66 and the ventilator 63.Interior Gas Pipe 66 is 240mm apart from ventilator 63 in the distance of jet end with inner high voltage tracheae 65, the other end bending of interior Gas Pipe 66 reaches outside the ventilator 63 as the through hole of gas kitchen pipe joint 69 from ventilator 63 sides, welding is air tight between interior Gas Pipe 66 and this through hole, the other end bending of inner high voltage tracheae 65 reaches outside the ventilator 63 from the through hole of interior Gas Pipe 66 sides and the through hole of ventilator 63 sides as high-pressure air pipe joint 64, and welding is air tight between two through holes of this of inner high voltage tracheae 65 and interior Gas Pipe 66 and ventilator 63.It is logical that the other end of the ventilator 63 of nozzle combustion heater 11 is that inlet end connects with the gas outlet of air blast 10.

Present embodiment also is being provided with air compressor 28, and the gas outlet of air compressor 28 connects with high-pressure air pipe joint 64 through valve 27 and high-pressure air pipe 25.5 fuel gas bottle 1 are set during use, and the gas outlet of fuel gas bottle 1 connects with Gas Pipe 12 through valve 13.Adorning the golden flame industrial combustion gas of " Beijing gold flame industrial combustion gas Co., Ltd " in the fuel gas bottle 1.For safety, fuel gas bottle 1 is separated placement with body of heater 16, preferably is placed in the special-purpose room.

Waste heat when melting in order to utilize, present embodiment are being provided with regenerative heat exchanger 14 and corresponding air regenerating device, and air regenerating device has scavenging air valve 6, steering gear 7, air blast 22 and air exhauster 3.The structure of regenerative heat exchanger 14 is seen Fig. 1 and Fig. 7, regenerative heat exchanger 14 has a steel plate shell 45, cushion asbestos board 46 in the inboard of steel plate shell 45, in steel plate shell 45, be separated into left box body 48, middle casing 51 and right case 53, in three casings, adorning the refractory brick heap 47, the refractory brick heap 52 and refractory brick heap 54 that are used for accumulation of energy respectively.Refractory brick layering in casing laminates placement, and the placement of refractory brick in casing be referring to Fig. 9 and Figure 10, and with the shape of refractory brick 57 with example explanation refractory brick, refractory brick 57 through hole 58 that distributing has four legs 59 at refractory brick 57.Refractory brick 57 is to stand up in casing, and through hole 58 is a horizontal direction like this.Resemble among Fig. 9 at vertical direction refractory brick and to pile up up and down together, horizontal direction overlaps together before and after resembling Figure 10, about to together, the interval is arranged between refractory brick 57 and the refractory brick 61, be convenient to the circulation of gas.The nozzle combustion heater 11 therefrom refractory brick of casing 51 is piled the back bulkhead 30 that 52 oblique cuttings are gone into body of heater 16, puts in burner hearth 32.

In steel plate shell 45 four through holes are being set, at left box body 48 two through holes are being set, at right case 53 two through holes are being set, gas for the ease of refractory brick heap 47 mixes, between the two ends of refractory brick heap 47 and steel plate shell 45, have at interval 44 and at interval 49, between the two ends of refractory brick heap 54 and steel plate shell 45, have at interval 50 and interval 56 equally.The through hole of left box body 48 right-hand members and the body of heater scavenge trunk 41 of body of heater 16 link, and the through hole of right case 53 right-hand members and the body of heater scavenge trunk 40 of body of heater 16 link, and the other end of body of heater scavenge trunk 40 and body of heater scavenge trunk 41 communicates with burner hearth 32.The through hole of left box body 48 left ends is connecting scavenge trunk 24, and the through hole of right case 53 left ends is connecting scavenge trunk 8.

The profile of scavenging air valve 6 is seen Fig. 2, and the internal structure of scavenging air valve 6 is seen Figure 12.Scavenging air valve 6 has the valve casing 72 of a circle, scavenge trunk 8 is corresponding with scavenge trunk 24, be connected in the both sides of scavenging air valve 6 respectively, the air inlet of air exhauster 3 is connecting exhaust tube 4, the gas outlet of air blast 22 is connecting air inlet pipe 9, the pipe joint 5 that exhaust tube 4 connects is corresponding with the mouth of pipe of air inlet pipe 9, is connected in the other both sides of scavenging air valve 6 respectively.On valve casing 72 tops steering gear 7 is installed, steering gear 7 has a rotating shaft 70, and the rotating shaft 70 of steering gear 7 reaches in the valve casing 72, is fixing valve plate 71 in rotating shaft 70, and valve plate 71 can followed rotating shaft 70 and rotated, like this rotation of steering gear 7 control valve plates 71.When valve plate is in the position of Figure 12, scavenging air valve 6 connects scavenge trunk 8 logical with air inlet pipe 9, simultaneously the pipe joint 5 of exhaust tube 4 is connected logical with scavenge trunk 24, when valve plate 71 is in the position of Figure 13, scavenging air valve 6 connects scavenge trunk 24 logical with air inlet pipe 9, simultaneously the pipe joint 5 of exhaust tube 4 is connected logical with scavenge trunk 8.

The diameter in the discharging road 37 of present embodiment is 50mm.The width of three casings is 300mm, and four intervals between refractory brick heap and the steel plate shell are 20mm.Air compressor can provide 8 atmospheric pressure, and air demand is per second 1.5-3m ³

Melting furnace embodiment two

The front view of present embodiment is referring to Fig. 1, and its structure is referring to Figure 14 and Figure 15, and the length in present embodiment molten bath is 3m, wide 3m, and dark 1m, during melting iron, capacity is 20 tons.Present embodiment is that a body of heater 73 is being provided with two regenerative heat exchangers 14 that structure is identical with the difference of embodiment one, each regenerative heat exchanger 14 is all disposing air exhauster 3, exhaust tube 4, pipe joint 5, scavenging air valve 6, steering gear 7, scavenge trunk 8, scavenge trunk 24, air inlet pipe 9, air blast 10, nozzle combustion heater 11, Gas Pipe 12, valve 13, valve 27, air blast 22 and high-pressure air pipe 25, by an air compressor 28 to two high-pressure air pipe 22 voltage supply air that contracts, by one group of fuel gas bottle to two Gas Pipe 12 for combustion gas.In burner hearth 78, have four body of heater scavenge trunks 40 and body of heater scavenge trunk 41.

Melting method embodiment

The melting unit that present embodiment adopts is the illustrated melting furnace of melting furnace embodiment one.Present embodiment fusing be casting pig ingot (T100), from charge door 17 toward the molten bath in the cast irons of 5 tons of addings in 34, block charge door 17 with plug 42.Start air compressor 28 and give nozzle combustion heater 11 air feed through inner high voltage tracheae 65 with 8 atmospheric pressure, start the spout of air blast 10 from outer cooling internal combustion tracheae 66, opening valve 13 gives nozzle combustion heater 11 for combustion gas, light combustion heater 11 and make it the flame burning, flame sprays to the cast iron that is added to molten bath 34, start air blast 22 and air exhauster 3 simultaneously, exhausting air feed in burner hearth 32, changed the direction of a valve plate 71 every one minute by steering gear 7 control scavenging air valves 6, waste gas in the burner hearth 32 is discharged from body of heater scavenge trunk 40, body of heater scavenge trunk 41 supplies air in burner hearth 32 simultaneously, after one minute, waste gas is from 41 discharges of body of heater scavenge trunk, and for air, such two body of heater scavenge trunks replaced waste discharge gas every one minute and supply air body of heater scavenge trunk 40 in burner hearth 32 simultaneously.11 heating of nozzle combustion heater were heated to 1450 ℃ with cast iron after 60 minutes, and cast iron all is molten into molten iron, closes air blast 10 and air compressor 28 and valve 13.Ladle is placed on the notch of blow tank 26, opens the plug (the reticulate pattern piece among Fig. 4 in the discharging road 37) in discharging road 37, molten iron flows to ladle, after the molten iron in the molten bath has been put, adds and casts iron ingot, and melts next stove.

Steering gear of the foregoing description and scavenging air valve are the Pneumatic four-way ball valves of the Q646H-16PDN100 type of Yin state, Ningbo City, Zhejiang Province Foundry Works production, and this ball valve top is steering gear, and the bottom is a scavenging air valve, can scavenging air valve be reequiped according to the flow of gas.

Claims

1, a kind of melting furnace, it comprises with fire-resistant brick body of heater, nozzle combustion heater and regenerative heat exchanger, at body of heater charge door and muck removal mouth and blow tank are being set, charge door is arranged on side wall of furnace, and burner hearth is arranged in body of heater, the reinforced road of charge door through tilting communicates with burner hearth, the molten bath of using electric smelting brick is being set under the burner hearth, is it is characterized in that: there is a discharging road bottom in molten bath to recessed at the bottom of the molten bath, blow tank is arranged on the preceding bulkhead of body of heater, and the other end in discharging road communicates with blow tank; The nozzle combustion heater tilts to be installed in the back bulkhead of body of heater and faces toward the molten bath; Said nozzle combustion heater is the nozzle combustion heater that three pipes are nested, and an end of nozzle combustion heater is jet end, and the other end is an inlet end, and the nozzle combustion heater mainly is made of interior Gas Pipe, inner high voltage tracheae and ventilator; In the Gas Pipe, interval is radially arranged between inner high voltage tracheae and the interior Gas Pipe in the inner high voltage tracheae is through, interior Gas Pipe is through in the ventilator, and interval is radially arranged between interior Gas Pipe and the ventilator; Interior Gas Pipe and inner high voltage tracheae are 200mm-400mm apart from ventilator in the distance of jet end, the other end bending of interior Gas Pipe reaches outside the ventilator as the through hole of gas kitchen pipe joint from the ventilator side, welding is air tight between interior Gas Pipe and this through hole, the other end bending of inner high voltage tracheae reaches outside the ventilator from the through hole of interior Gas Pipe side and the through hole of ventilator side as the high-pressure air pipe joint, and welding is air tight between two through holes of this of inner high voltage tracheae and interior Gas Pipe and ventilator; The inner high voltage tracheae provides oxygen for the golden flame industrial combustion gas of interior Gas Pipe, and the other end of the ventilator of nozzle combustion heater is an inlet end; Said regenerative heat exchanger has a steel plate shell, cushions asbestos board in the inboard of steel plate shell, is separated into left box body, middle casing and right case in steel plate shell, is adorning the refractory brick of being made up of the refractory brick heap that is used for accumulation of energy in three casings respectively; Refractory brick layering in casing laminates placement, piles up up and down together at vertical direction refractory brick, overlap together before and after the horizontal direction, about to together; Refractory brick is cuboid, and the through hole that distributing on the refractory brick in left box body and right case has minimum two legs on the surface of refractory brick, and making between the adjacent refractory brick in front and back has at interval; Refractory brick is to erect to be placed in the casing, makes through hole become horizontal direction; In steel plate shell four through holes are being set, two through holes are being set, two through holes are being set, between the two ends of the refractory brick of left box body heap and steel plate shell, having at interval, between the two ends of the refractory brick heap of right case and steel plate shell, having at interval at right case at left box body; Left box body links near the through hole of body of heater one end and a body of heater scavenge trunk of body of heater setting, and right case links near the through hole of body of heater one end and another body of heater scavenge trunk of body of heater setting, and the other end of two body of heater scavenge trunks communicates with burner hearth; The through hole of the other end of left box body is connecting a scavenge trunk, and the through hole of the right case other end is connecting another root scavenge trunk; Regenerative heat exchanger is disposing air regenerating device, and air regenerating device has scavenging air valve, steering gear; Scavenging air valve has the valve casing of a circle, two scavenge trunks that connect with regenerative heat exchanger are connected in the corresponding both sides of scavenging air valve respectively, scavenging air valve is also connecting exhaust tube and air inlet pipe, and the air inlet of exhaust tube and the gas outlet of air inlet pipe are separately positioned on the corresponding both sides of scavenging air valve; The steering gear of control valve plate is installed on the valve casing of scavenging air valve, and steering gear has a rotating shaft, and the rotating shaft of steering gear reaches in the valve casing, is fixing valve plate in the rotating shaft in reaching valve casing, and steering gear can be by the time interval of setting, rotational valve plate; During certain position, valve plate place, scavenging air valve connects a body of heater scavenge trunk logical with air inlet pipe, simultaneously exhaust tube is connected logical with another body of heater scavenge trunk, when position that valve plate turns an angle, scavenging air valve connects exhaust tube logical with a body of heater scavenge trunk, simultaneously another body of heater scavenge trunk is connected logical with air inlet pipe.

2, melting furnace according to claim 1, it is characterized in that: air feed equipment and air exhauster also are being set, air feed equipment has air compressor and two air blasts, and the gas outlet of air compressor connects with the high-pressure air pipe joint of nozzle combustion heater through high-pressure air pipe; The gas outlet of an air blast connects logical with the inlet end of the ventilator of nozzle combustion heater, the gas outlet of another air blast connects with the air inlet of the air inlet pipe of commutator; The air inlet of air exhauster connects with the gas outlet of exhaust tube.