CN201583122U

CN201583122U - High-pressure adjustable dual-row rotary wind melting furnace

Info

Publication number: CN201583122U
Application number: CN2010200267274U
Authority: CN
Inventors: 李怀禹
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-01-14
Filing date: 2010-01-14
Publication date: 2010-09-15
Anticipated expiration: 2020-01-14

Abstract

The utility model relates to a high-pressure adjustable dual-row rotary wind melting furnace. A dust collector is arranged on a smoke cylinder, a wind belt is arranged on a supporting seat, a front furnace is arranged at the side face of the wind belt, an iron outlet is arranged on the front furnace, a charging mechanism is arranged at the side face of the charging opening, a rotary wind generator is arranged at the periphery of the wind belt, a secondary wind pipe is arranged at the upper part of the wind belt, a pipe heat exchanger is arranged under the smoke cylinder, the charging opening is arranged under the pipe heat exchanger, and the pipe heat exchanger is connected with the wind belt by a branch wind pipe. By adopting the above structure, the high-pressure adjustable dual-row rotary wind melting furnace has the characteristics of high quality of molten iron, high melting speed, low melting cost, long lining life and simple as well as convenient operation. Therefore, the melting furnace is suitable for melting various cast irons.

Description

Suppress adjustable double rotation wind melting furnace

Technical field

The utility model relates to the adjustable double rotation wind melting furnace of suppressing that a kind of machine casting melting uses.

Background technology

Present melting furnace mainly divides three types: cool wind stove, hot-blast stove and water cooling stove.

Cool wind stove is simple in structure, but molten iron temperature is low, melting loss of elements is big, the working of a furnace is unstable, and main cause is that cold wind is poor to the overheavy firing effect of bed coke, air-flow is subjected to stopping of coke and is difficult to go deep into the stove heart, cause the furnace wall effect serious, so the burner hearth scaling loss is serious with erosion, it is big that size of burner hearth becomes, cause air feed intensity and melting intensity to change, thereby cause following defective: (1) burnt consumption is unstable: the blow-on time is long more, and burner hearth is big more, and bed coke height descends, it is frequent more to add relay Jiao, and burnt consumption is big; (2) melting rate shakiness: the blow-on time is long more, and burner hearth is big more, and melting rate is big more; (3) alloying element scaling loss shakiness: the blow-on time is long more, and burner hearth is big more, and particularly the air feed intensity to the stove heart is more little, and temperature descends in the stove, makes the scaling loss of alloying element big more; (4) molten iron temperature shakiness: the blow-on time is long more, and burner hearth is big more, and it is poor more that air-flow is difficult to go deep into the anxious charcoal combustion efficiency of the stove heart, particularly stove more, and molten iron temperature is low more.

Hot-blast stove has been because combustion-supporting effect has been played in the burning of hot blast STRENGTH ON COKE, so molten iron temperature increases, and the alloying element scaling loss reduces to some extent, but has above-mentioned defective equally.Hot blast courage service life is short, and particularly every stove blow-on time surpasses 10 hours, then service life shorter, in effective operating period, As time goes on, hot blast courage cracking is frequent more, is out of shape serious more, maintenance is just difficult more, gets stuck in the fusion process, scaffold is serious more, and the melting index descends more.

The water cooling stove is adapted to the continuous mass-produced needs of production line, but need have the shortcoming that investment is big, power consumption is bigger up to the hot blast support more than 500 ℃.

Summary of the invention

The purpose of this utility model just provides a kind of molten steel quality height, and burn-off rate is fast, and melting expends few, and lining durability is long, melting furnace easy and simple to handle.

The utility model can be realized in the following manner: chimney is provided with dust arrester, the wind band is located on the supporting seat, forehearth is located at wind band side, forehearth is provided with tapping hole, and feed mechanism is located at the charge door side, is provided with the rotation air generator around the described wind band, wind band top is provided with secondary air channel, pipe heat exchanger is located at below the chimney, is provided with charge door below the pipe heat exchanger, and pipe heat exchanger is connected with the wind band by branch wind pipe.

Described rotation air generator is to be made of shell, negative pressure bar, negative pressure cover and fixed cover, the negative pressure bar is inserted in the negative pressure cover, the negative pressure bar is provided with handle, be provided with the gap between negative pressure cover and the rear casing, front casing, rear casing are provided with the air intake inclined hole, and rear casing one end is provided with outer fixed cover, and front casing one end is provided with exhaust vent, the front casing front end is provided with interior fixed cover, is provided with the shunting cover between front casing and the negative pressure cover.

Described pipe heat exchanger is to be made of steel pipe, inner core, urceolus, blast pipe and discharge pipe, and steel pipe is fixed on the inner core, and inner core is provided with urceolus outward, and urceolus top is provided with blast pipe, and the urceolus bottom is provided with discharge pipe.

The utlity model has following effect and advantage:

1, utilize rotating generator to improve the air quantity of melting furnace, owing to improved the flowing velocity of intake velocity and furnace gas, increased the air capacity that participates in combustion reaction, thereby remove the lime-ash that coke surface hinders burning, and strengthen the coke burning, improve the temperature of furnace gas, and because of high-speed air flow is easy to go deep into the stove heart, can improve furnace gas and Temperature Distribution, reduce lining wear, thereby help the heat exchange in the stove.

2, in order to make full use of the chemical heat of furnace gas, at the upper surface of wind band CO ₂Substantially stop in the reduction reaction of high temperature anaerobic district generation with red-hot coke, CO sends into secondary wind in the most concentrated zone, impels CO further to burn and generates CO ₂, emit heat, thereby abundant preheating furnace charge makes molten iron overheated in higher position fusing.Facts have proved: secondary wind helps improving molten iron temperature, reduces coke consumption, improves melting rate.

3, improve wind-warm syndrome, promptly improve the air themperature of sending in the stove, owing to increased the origin of heat in the wind band, and strengthened actual intake velocity because of volume of air expands, thereby have following effect: (1) strengthens the coke burning, improves burning velocity and furnace gas temperature; (2) shorten high-temperature area, the reduction reaction of aggravation CO reduces the furnace gas ratio of combustion.

4, the utlity model has the molten steel quality height, burn-off rate is fast, and melting expends few, and lining durability is long, and characteristics easy and simple to handle are fit to the various cast irons of melting.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the structural representation of rotation air generator.

Fig. 3 is the structural representation of pipe heat exchanger.

In the drawings: dust arrester 1, chimney 2, pipe heat exchanger 3, charge door 4, branch wind pipe 5, secondary air channel 6, wind band 7, rotation air generator 8, forehearth 9, tapping hole 10, supporting seat 11, feed mechanism 12, outer fixed cover 13, rear casing 14, air intake inclined hole 15, front casing 16, exhaust vent 17, shunting cover 18, interior fixed cover 19, negative pressure bar 20, negative pressure cover 21, handle 22, blast pipe 23, steel pipe 24, urceolus 25, discharge pipe 26, inner core 27.

The specific embodiment

Below in conjunction with embodiment, the utility model will be further described, but it is not represented as unique embodiment of the present utility model.

Please read Fig. 1, dust arrester 1 is installed on the chimney 2, wind band 7 is installed on the supporting seat 11, and forehearth 9 is installed in the side of wind band 7, and tapping hole 10 is installed on the forehearth 9, feed mechanism 12 is installed in the side of charge door 4, around the wind band 7 a plurality of rotation air generators 8 are installed, wind band 7 tops are equipped with secondary air channel 6, and pipe heat exchanger 3 is installed in below the chimney 2, charge door 4 is installed below the pipe heat exchanger 3, and pipe heat exchanger 3 is connected with wind band 7 by branch wind pipe 5.

Please read Fig. 2, rotation air generator 8 is to be made of front casing 16, rear casing 14, negative pressure bar 20, negative pressure cover 21, outer fixed cover 13 and interior fixed cover 19, negative pressure bar 20 is inserted in the negative pressure cover 21, handle 22 is installed on the negative pressure bar 20, be provided with the gap between negative pressure cover 21 and the rear casing 14, be equipped with air intake inclined hole 15 on front casing 16, the rear casing 14, rear casing 14 1 ends are provided with outer fixed cover 13, front casing 16 1 ends are provided with exhaust vent 17, front casing 16 front ends are provided with interior fixed cover 19, are provided with shunting cover 18 between front casing 16 and the negative pressure cover 21.

Please read Fig. 3, pipe heat exchanger 3 is to be made of steel pipe 24, inner core 27, urceolus 25, blast pipe 23 and discharge pipe 26, and steel pipe 24 is fixed on the inner core 27, the inner core 27 outer urceolus 25 that are provided with, urceolus 25 tops are equipped with blast pipe 23, and urceolus 25 bottoms are equipped with discharge pipe 26.

When the utility model is used for melting cast iron, metal charge and fuel are sent in the charge door 4 continuously by feed mechanism 12, by pipe heat exchanger 3 air blast is sent into the cold wind heating, send into wind band 7 continuously through branch wind pipe 5 again, when the wind in the wind band 7 enters rotation air generator 8, air intake inclined hole 15 enters the slit between rear casing 14 and the negative pressure cover 21 from the rear casing 14, because the cause of inclined hole on rear casing and the front casing, therefore the wind that comes out from exhaust vent 17 rotates, the rotation wind that comes out from the rotation air generator moves forward just as the first sample of grenade is track, thereby coke surface is able to continuous activation, combustion reaction aggravation, furnace temperature raising; The intake of rotation air generator can be realized by the width of adjustable ring gap.Wind is sent into the combustion melting of strengthening furnace charge in the stove after being pressurizeed by 8 rotations of rotation air generator, iron liquid after the fusing flows to forehearth 9, when accumulating to some, be put into iron liquid bucket by tapping hole 10 and transport to the workshop pouring cast part, the flue gas that continuous melting produced is discharged in the dust arrester 1 by chimney 2, prepares next step smoke abatement and dust control.Because the effect of hot blast and rotation air generator 8, melting furnace gos deep into the stove heart because of high-speed air flow, furnace gas and Temperature Distribution have been improved, furnace wall effect and furnace wall corrode have been reduced, thereby help the reinforcement of heat exchange in the stove, owing to send into secondary air flow, impel CO further to burn and generate CO again from secondary air channel 6 ₂, emit heat, thus abundant preheating furnace charge.

The flue gas that rises in the melting furnace burns in the combustion chamber steel pipe 24 heating, the cold wind that enters from blast pipe 23 is during through the steel pipe 24 of heating, be heated to design temperature from normal temperature, send into the wind band from discharge pipe 26 and secondary air channel 6 through connecting pipe again, the rotation air generator on the wind band is sent in the stove combustion-supporting again.Hot blast is brought the heat of some in the stove into, has dwindled near the cooling range of the air in air port, makes the faster burning of air and coke.Because wind-warm syndrome improves, volume of air expands, the concentration of oxygen increases, and adds the rotation air generator and has improved air supply velocity and blast intensity, thereby quickened the violent burning of bed coke, oxygen is exhausted at tuyere area fast, temperature acutely raises at the trend tuyere area, dwindles oxidized zone and zone of reduction scope in the bed coke, thereby obtains high temperature and concentrated overheated zone, reduced the heat loss of stove, it is overheated to help iron liquid.Hot blast has also enlarged the charge preheating scope, and it is more abundant to make it preheating.In addition, because hot blast shortens oxidized zone, reduced burnt consumption, so corresponding carbon, the sulfur content that has reduced in the iron liquid, the scaling loss of silicon, manganese element also reduces.

Claims

1. suppress adjustable double rotation wind melting furnace for one kind, chimney (2) is provided with dust arrester (1), wind band (7) is located on the supporting seat (11), forehearth (9) is located at wind band (7) side, forehearth (9) is provided with tapping hole (10), feed mechanism (12) is located at charge door (4) side, it is characterized in that wind band (7) is provided with rotation air generator (8) on every side, wind band (7) top is provided with secondary air channel (6), pipe heat exchanger (3) is located at below the chimney (2), be provided with charge door (4) below the pipe heat exchanger (3), pipe heat exchanger (3) is connected with wind band (7) by branch wind pipe (5).

2. according to claim 1ly suppress adjustable double rotation wind melting furnace, it is characterized in that rotating air generator (8) is by shell, negative pressure bar (20), negative pressure cover (21) and fixed cover constitute, negative pressure bar (20) is inserted in the negative pressure cover (21), negative pressure bar (20) is provided with handle (22), be provided with the gap between negative pressure cover (21) and the rear casing (14), front casing (16), rear casing (14) is provided with air intake inclined hole (15), rear casing (14) one ends are provided with outer fixed cover (13), front casing (16) one ends are provided with exhaust vent (17), front casing (16) front end is provided with interior fixed cover (19), is provided with shunting cover (18) between front casing (16) and the negative pressure cover (21).

3. according to claim 1ly suppress adjustable double rotation wind melting furnace, it is characterized in that pipe heat exchanger (3) is to be made of steel pipe (24), inner core (27), urceolus (25), blast pipe (23) and discharge pipe (26), steel pipe (24) is fixed on the inner core (27), the outer urceolus (25) that is provided with of inner core (27), urceolus (25) top is provided with blast pipe (23), and urceolus (25) bottom is provided with discharge pipe (26).