CN1100515A

CN1100515A - Multi-chamber continuous annealing furnace

Info

Publication number: CN1100515A
Application number: CN 94108781
Authority: CN
Inventors: 彭景尧; 彭玉
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-08-06
Filing date: 1994-08-06
Publication date: 1995-03-22
Anticipated expiration: 2014-08-06
Also published as: CN1067155C

Abstract

In the said improved annealing furnace, the preheating, heating and slow cooling in annealing process are performed in three separated chambers. Of the three chambers, heating chamber has its flue connected to preheating one and the slow cooling one is independent. Based on the annealing functions required, the said annealing furnace is reasonably designed so as to realize process control and to reduce energy consumption. It is esp. suitable for annealing drawn wire and cold-rolled steel belt.

Description

Multi-chamber continuous annealing furnace

The present invention relates to a kind of multi-chamber continuous annealing furnace, belong to the used stove technical field of heat treatment.

Annealing furnace is a kind of common used in industry stove, because the annealing process required time is longer, so this industrial furnace is the higher device of a kind of energy consumption.Advanced annealing furnace adopts senior insulation material to build stove, and controls with computer, though this annealing furnace specific energy consumption has obvious decline, the cost height, operate strict, the general higher production line of working continuously of some levels that only is used for.Domestic a large amount of used annealing furnace of middle-size and small-size section bar processing industry is taken over traditional tunnel type or real shape formula stove always, these annealing furnace energy consumption height, and technology controlling and process is difficulty, and also there are defectives such as heating is inhomogeneous in many stoves, influence product quality.

The objective of the invention is to disclose low and the annealing furnace that technology controlling and process is stable of a kind of energy consumption, stove is handled in the continuous annealing of metal-processing industries such as particularly suitable wire rod and band.

Task of the present invention is achieved in that described annealing furnace is a kind of multi-cavity chamber stove, comprise heated chamber, the preheating chamber cold chamber that eases up, each chamber is isolated mutually, the flue of its heated chamber is communicated with the preheating chamber, and the exhaust opening of preheating chamber is communicated with the chimney of stove.

On the tunnel type stove, the present invention realizes like this, preheating chamber is located at an end of heating clamber, the centre isolates with lock gate hatch, the slow cooling chamber is located at the other end of heating clamber, and a middle side wall of also isolating heating clamber with lock gate hatch is the florid ornamentation in Chinese opera singing body of wall, is communicated with quirk within the walls, another side wall is provided with flue, and this flue is communicated with preheating chamber.

On real dress formula stove, the following scheme of the concrete employing of the present invention: described annealing furnace is made up of the upper-opening pillar inner chamber stove of a plurality of band bells, its heated chamber and preheating chamber are built in the disjunctor stove, the heated chamber inwall is a florid ornamentation in Chinese opera singing, is communicated with quirk in the wall, and the endless belt on florid ornamentation in Chinese opera singing top is provided with outlet flue, be communicated with the preheating chamber bottom through flue, preheating chamber top is exhaust opening, is communicated with chimney, and described slow cooling chamber is built in 1-2 the discrete stove.

Adopt the three phases of technique scheme post anneal, i.e. preheating, heating and slow cooling are carried out in three different chambers, and each function chamber is independent substantially, so with regard to each function chamber, be in all the time among a kind of state of the art in the operation.Its result at first is that furnace binding design and selecting for use of furnace building material can be done more reasonably to arrange according to the function of use of each chamber when building stove, for example, on heating furnace, select higher insulation furnace building material for use, and on structural design, take to avoid heating uneven special measure, on leer, then can use common material earlier, this is for improving stove quality and service life, and it all is favourable cutting down the consumption of energy.Next is to be convenient to technology controlling and process, to guarantee product quality.Because the operating procedure of each function stove is in a kind of state all the time, makes whole system become a kind of lasting stable slave mode easily.Compare with the real shove charge of tradition, this continual and steady effect is fairly obvious; Even compare with conventional tunnel formula stove, the technology controlling and process environment of this enclosed of the present invention, more reliable than the open type environment of conventional tunnel always for the uniformity and the stability of control.The 3rd is that the Increasing Production and Energy Saving effect is fairly obvious, compares in present middle-size and small-size wire drawing and cold belt technological level, and ton steel coal consumption only be original 1/3rd, and production efficiency then can improve 3-4 times under the fire bars spare in equal building.At last, preheating chamber of the present invention since the flue dust flow velocity descend, a suitable effective depositing dust link, this is for using coal-fired stove system, also subsidiary have a positive environment protecting.

With regard to drawings and Examples the present invention is specified below.

Fig. 1 is a tunnel type continuous annealing furnace overall structure schematic diagram.

Fig. 2 is the A-A view of Fig. 1.

Fig. 3 is the B-B view of Fig. 2.

Fig. 4 is the C-C view of Fig. 2.

Fig. 5 is the D-D view of Fig. 2.

Fig. 6 is a upper-opening continuous annealing furnace schematic diagram.

Fig. 7 is heating, preheating disjunctor furnace structure schematic diagram.

Tunnel annealing furnace main body master comprises big stove 1 among Fig. 1-Fig. 5, heating furnace 2, preheating furnace 3 and leer 4.One side of big stove 1 is provided with air-blast device 5.One side of preheating furnace 3 is a chimney 6.All establish lifting fire door 7 in the end of preheating furnace 3 and leer 4.Chassis 8 also is provided with stringer dolly 11 walking crosswise operation on the track 9 on the stringer track 10 of walking crosswise track 9 two ends, use for chassis 8 transitions.Stringer dolly 11 is by stringer Roll Sushi machine travel, and chassis 8 is by walking crosswise the hoist engine traction.And conventional tunnel kiln difference mainly is respectively to be provided with gate 12 between the chamber of described heating furnace 2 chambers and preheating furnace 3 and between the chamber of the chamber of heating furnace 2 and leer 4, and each function furnace chamber is divided into independent cavity.Gate 12 is a wedge shape section wide at the top and narrow at the bottom, adopts hoisting type to open, and portal frame 13 and winding plant are finished the keying of gate 12.The upper end of gate 12 and lower end are equipped with down groove 14, and these fell groove and are respectively in the sand seal groove 15 and the sand seal groove 16 on the chassis 8 of furnace roof when gate 12 fell, and formed excellent sealing.

Be provided with quirk 22 in the partition wall between heating furnace 2 and big stove 1, be communicated with through the chamber of florid ornamentation in Chinese opera singing 17 with heating furnace 2.Another side wall of this chamber is provided with flue 18, with being communicated with of the chamber of preheating furnace 3.Another side wall of preheating furnace chamber is provided with outlet flue 19, is communicated with chimney 6.Heating furnace 2 of the present invention is in an enclosed heating environment after gate 12 falls sealing, compare with the conventional tunnel stove, and the non-thermal radiation loss, so the thermal efficiency is higher, technology controlling and process such as intensification and insulation are more convenient.Preheating furnace 2 of the present invention also has tangible gravitational settling effect except utilizing the fume afterheat, can effectively reduce dust content in the flue gas.Leer 4 of the present invention only utilizes the waste heat of processed workpiece and the heat-insulating property of body of heater to reach slow cooling, does not need the heat radiation energy supplement of heating chamber, facts have proved can satisfy the conventional annealing technological requirement fully.

The hot-fluid dead band that two zones of the close gate in florid ornamentation in Chinese opera singing 17 belows of heating furnace 2 are furnace chamber.For eliminating this dead band, set up two auxiliary outlet flues 20 on the side wall with the position, dead band in the present embodiment, and through assisting flue 21 to be communicated with the chamber of preheating furnace 3, heating furnace 2 inner a part of thermal currents flowed out through assisting discharge flue, thereby reached the homogeneous heating purpose.

When processed workpiece was finished this section annealing operation in residing chamber after, end door 7 and gate 12 rose, and walk crosswise Roll Sushi mechanism with the traversing station of chassis, rapid then shutdown side door 7 and gate 12, the operation of a beginning new round.Pull out the outer workpiece of stove and treat to unload after the air cooling, pending workpiece is loaded onto empty chassis, waits for stove.Stringer dolly 11 is provided with traverse rod, can integrate with traverse rod in the stove or the outer traverse rod of stove.Chassis can be transferred on the traverse rod from the stringer dolly when integrating with, otherwise perhaps.

The tunnel annealing furnace floor space is big, and the brickwork investment is higher, relatively is adapted at cold rolling workshop and uses.For the required annealing operation of operations such as wire drawing, the invention provides the real shove charge of upper-opening, as shown in Figure 6 and Figure 7.

Heating furnace 32 and preheating furnace 33 constitute a disjunctor stove among the figure, by big stove 31 heat supplies, and chimney 36 smoke evacuations.34 of leers are discrete holding furnace.Heating furnace 32, preheating furnace 33 and leer 34 are upper-opening column chamber stove, and the diameter of the chamber of each stove is with highly consistent, and the top is insulation bell 41.The furnace wall of heating furnace 32 is provided with florid ornamentation in Chinese opera singing 37 quirks 38 and flue 39 three-deckers.Footpath, the upper end floss hole 35 of flue 39 is communicated with heating furnace 32 chambers, and the lower end is communicated with preheating furnace 33 bottoms.The top of preheating furnace 33 is provided with exhaust opening 40, is communicated with chimney 36.Leer 34 does not have heating or smoke evacuation system, so be a kind of common column heat-preserving container in fact.Because leer 34 brickwork costs are very low,, uses by a cover annealing furnace so can being equipped with 1-2 leer.

Stove is gone in lifting after the workpiece tinning, moves stove then step by step, finishes whole annealing operation.

From above-mentioned two embodiment provided by the invention as can be known, more conventional stove obviously improves the efficient of whole annealing operation because heating furnace temperature rise amplitude is little.These characteristics of heating furnace make energy consumption descend simultaneously again, and make technology controlling and process more stable.

Basic furnace building material is a steel construction 25 in above-mentioned two legends, refractory brick 26, vermiculite or expanded perlite 27 and silicate fiber felt 28.Furnace building material can rationally be selected for use by the function of stove.

Claims

1, a kind of multi-chamber continuous annealing furnace comprises the gentle cold chamber of heated chamber, preheating chamber, it is characterized in that described each chamber isolates mutually, and the flue of described heated chamber is communicated with the preheating chamber, and the exhaust opening of described preheating chamber is communicated with the chimney of stove.

2, by the described multi-chamber continuous annealing furnace of claim 1, it is characterized in that described preheating chamber is located at an end of heated chamber, the slow cooling chamber is located at the other end of heated chamber, constitutes the tunnel type stove, isolates with lock gate hatch between each chamber.

3, by the described multi-chamber continuous annealing furnace of claim 2, it is characterized in that a side wall of described heated chamber is the florid ornamentation in Chinese opera singing body of wall, be communicated with that another side wall is provided with flue, is communicated with the preheating chamber with quirk.

4, by the described multi-chamber continuous annealing furnace of claim 3, it is characterized in that being provided with the auxiliary flue that is communicated with the preheating chamber in two angular positions of going to the bottom of described florid ornamentation in Chinese opera singing body of wall.

5, by claim 2,3 or 4 described multi-chamber continuous annealing furnaces, it is characterized in that described lock gate hatch is the upper-opening gate, the bottom and the top of gate are provided with the structure of falling the groove, and the described structure of falling the groove is buckled in respectively in the stove in the sand seal groove on the chassis and furnace roof when closing gate.

6, by the described multi-chamber continuous annealing furnace of claim 1, it is characterized in that the pillar inner chamber stove of described each function stove for the band bell, wherein heated chamber and preheating chamber constitute a disjunctor stove, and the slow cooling chamber is located in the discrete body of heater.

7, by the described multi-chamber continuous annealing furnace of claim 6, it is characterized in that described heated chamber inwall is a florid ornamentation in Chinese opera singing, be communicated with quirk that florid ornamentation in Chinese opera singing top is provided with outlet flue, is communicated with preheating chamber bottom through flue, preheating chamber top is provided with exhaust opening, is communicated with chimney.

8,, it is characterized in that described slow cooling chamber build in 1 or 2 the discrete bodies of heater by claim 6 or 7 described multi-chamber continuous annealing furnaces.