CN2270055Y - Ring heating furnace for continuous casting and rolling - Google Patents

Abstract

The utility model discloses a rotation type ring-shaped heating furnace used for continuous casting and continuous rolling. The operation of the existing heating furnace is not flexible and the heat utilization efficiency is low. The problems are effectively solved through the improvement of heating tube blank and shaft-shaped components. The improved heat furnace is characterized in that a material inlet and a material outlet form a 90 DEG angle on a plane, the bottom is provided with a material groove, a material level display is arranged in the furnace, and the bottom of the furnace is driven to rotate by a forward and reverse rotation speed regulating motor. Continuous casting billets of different types of steel can be heated by the heating furnace and then are continuously rolled.

Description

The continuous casting and direct rolling rotary heating furnace

The utility model relates to continuous casting steel billet and enters continuous mill heating unit before, especially a kind of rotary heating furnace.

Behind the continuous casting incessantly continuous rolling have a lot of significantly advantages, be the developing direction of continuous casting technology.But the heating link exists the problem that is connected bad in the middle of continuous casting and tandem rolling.General steel-pushing type or the stepped start-stop system continuous furnace of adopting of continuously cast bloom heating now.If adopt a continuous caster, a process furnace and a fast milling train coordinated scheme, then when continuous caster fault or maintenance, process furnace can only heat cold burden, advances continuous mill then.When the continuous casting material temperature is 500-700 ℃ temperature material, be sent to shove charge behind the stove, heating by cold bed, come out of the stove from the stokehold then, rolling.When the continuous casting material temperature more than 950 ℃ the time, after the simple re-heat of re-heat stove, it is rolling directly to be sent to continuous mill.The shortcoming of this stove is: 1. blank can only advance and can not move back in the stove, and cold burden, temperature are expected, hot material can not be at same stove internal heating.When material dress heat, heating is fast, and rolling mill speed is fast and casting speed is slow, and milling train often is in the material state for the treatment of, throughput can not be brought into play.Dress is during cold burden, and heating is slow, milling train also often treat at this moment to work on heat as casting machine, blank must be put cold.Thereby heating is alternate.A stove is difficult to adapt to the requirement of differing temps blank.2. during rolling mill fault, the blank of having come out of the stove can not heat again in order, rolling, have to fall behind.3. process furnace tapping speed is difficult for adjusting flexibly, and when the continuous casting steel grade changed, process furnace also was difficult for adapting to changing.4. during rolling mill fault, continuously cast bloom can't shove charge, have to put coldly, has wasted heat energy.

At above problem, the someone proposes to mate with two continuous furnaces and two continuous casters, a continuous mill.With traversing chassis dealing haul, two process furnace heat temperature material and cold burden respectively, with re-heat stove heat hot material.Adopt this mode that continuous caster and continuous mill throughput, cycle are mated easily, cold, warm, heat material is respectively walked a line, interferes with each other little.During rolling mill fault, process furnace has certain surge capability, but blank still can only advance in stove and can not move back, the difficult adjustment flexibly of the speed of coming out of the stove.Two process furnace blank of can not coming out of the stove simultaneously, the stove utilization ratio is low, and milling train is returned material and also can't be melted down, and have to fall behind the organization of production difficulty.

Adopt a kind of rotary type rotary heating furnace, this process furnace can realize rotating, segmentation control heating at seamless steel tubing mill, wheel-tyre factory heating pipe, shaft-type part etc.These characteristics can be offered help to the problem that solves continuous casting, the appearance of the middle heating of tandem rolling link, but must improve to satisfy the requirement of continuous casting, tandem rolling its structure.So far yet there are no the report that rotary heating furnace is used for continuous casting, tandem rolling.

The purpose of this utility model is to provide a kind of rotary heating furnace that is used for continuous casting and direct rolling, can heat cold burden, temperature material and heat material in same stove, and steel grade also can be flexible, thereby improve heating efficiency, guarantees continuous caster, continuous mill high-efficient operation.

The purpose of this utility model is achieved in that

Continuous casting and direct rolling makes steel billet heating continuously in rotational direction on furnace bottom with rotary heating furnace.Process furnace comprises: fixedly furnace shell, opening for feed, discharge port, burner, burning chew, furnace bottom and carriage, supporter roller, cooling water seal, flue, interchanger, transmission mechanism, motor that furnace bottom is rotated.It is characterized in that: opening for feed becomes 90 ° in the plane with discharge port, hopper is set at the bottom of the ring furnace, the material level indicating meter also is housed on the stove, the material level indicating meter is made of row's contact switch, contact switch divides positioning contact and shows contact, and positioning contact is fixed on the furnace bottom of rotation, shows that contact is fixed on the furnace wall, stove is provided with the signal lamp that shows material level outward, and furnace bottom connects the buncher of rotating.

The utility model has utilized the advantage of existing rotary heating furnace, by the improvement to its structure, only just can mate with two continuous casters, a continuous mill with a rotary heating furnace.Cold, warm material can be placed on same stove internal heating.Ring furnace can just change, reverse, and is equivalent to steel-pushing type or the stepped start-stop system continuous furnace is free to go forward or back out.Rotary heating furnace furnace bottom adjustable-speed, the top zone heating burns and chews and can open more, also can open less, adapts to the different steel grades of heating, differing temps blank.During rolling mill fault, the steel billet of returning can melt down, and holds up.Steel billet can be piled up neatly in stove and puts, thereby during the continuous mill fault, continuous caster can not stop production, and steel billet is not put cold yet, heat energy utilization rate height.Simultaneously, the continuous furnace floor space that rotary heating furnace equates with two overall throughputs equates, and utilization ratio greatly improves.When the furnace bottom that computerizeds control rotates, when coming out of the stove, be easy to tissue production by the material level shove charge.The gross investment of two stepped start-stop system continuous furnaces of output investment ratio of a rotary heating furnace will be hanged down 15-20%.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further details.

Fig. 1 is the rotary heating furnace diagrammatic cross-section;

Fig. 2 is rotary heating furnace and continuous casting, continuous mill floor plan synoptic diagram;

Fig. 3 is the hopper synoptic diagram on the refractory materials furnace bottom.

Rotary heating furnace comprises with lower member: furnace shell 1, and build by laying bricks or stones by steel construction and refractory materials and to form.Opening for feed 2, discharge port 3, two mouthfuls become 90 ° in the plane as shown in Figure 2.Burner 4, segmentation is established 40 burnings and is chewed 5 on annular furnace wall.Refractory materials furnace bottom 6, furnace bottom carriage 7, supporter roller 8, roller track 9, lower margin 10.Cooling water seal 11, flue 12, interchanger 13.Worm reduction gear 14, rotating buncher 15, gear, annular tooth plate 16, shaft coupling 17, totally two covers.Make with refractory materials at the bottom of the ring furnace, hopper 18 is set above, convenient buttress is put steel billet.For grasp is heated the position of blank, be provided with material level indicating meter 19 in the stove.The material level indicating meter is made of row's contact switch, contact switch divides positioning contact 20 and shows contact 21, positioning contact is fixed near the hopper at the bottom of the rotary oven, rotate with furnace bottom, show that contact is fixed on the furnace wall, stove is provided with the signal lamp that shows material level outward, two contact contact energisings, light the signal lamp that shows a certain material level, with accurate control discharging order.

When wanting cold burden to advance stove,, steel billet 25 is packed in the stove to traversing chassis 23 through cold burden stand 22 with loading machine 24, in stove, change 630 ° clockwise along arrow A, use discharging machine 26 taking-ups, send into continuous mill 27.When continuous caster 28 comes out 500-700 ℃ temperature when expecting into stove, in the stove of packing into through traversing chassis, with loading machine, change 270 ° clockwise along arrow B, coming out of the stove with discharging machine enters continuous mill.When continuous caster comes out 900-1000 ℃ heat when expecting into stove, send in the stove through traversing chassis, loading machine, in stove, change 90 ° counterclockwise along arrow C, coming out of the stove with discharging machine enters continuous mill.When the continuous mill fault was returned material, it was temporary to put into stove through discharging machine, shifts out, goes into continuous mill with discharging machine again after machine maintenance to be rolled is good.The rotation of furnace bottom and come out of the stove by material level and to adopt the computer control best results.

Claims (2)

1. rotary type rotary heating furnace that is connected continuous casting-tandem rolling, this process furnace comprises that fixedly furnace shell, opening for feed, discharge port, burner, burning are chewed, furnace bottom and carriage, supporter roller, cooling water seal, flue, interchanger, transmission mechanism, motor that furnace bottom is rotated, it is characterized in that: opening for feed becomes 90 ° in the plane with discharge port, hopper is set at the bottom of the ring furnace, the material level indicating meter is housed on the stove, and furnace bottom connects the buncher of rotating.

2. rotary type rotary heating furnace according to claim 1, it is characterized in that: the material level indicating meter is made of row's contact switch, contact switch divides positioning contact and shows contact, positioning contact is fixed on the furnace bottom of rotation, show that contact is fixed on the furnace wall, stove is provided with the signal lamp that shows material level outward.