CN101333580A - Laying method of non pocket block tap hole for steel making converter - Google Patents

Abstract

Disclosed is a baseless brick tap hole bricklaying method of a steel converter, in particular to a bricklaying method applied to tap holes of steel-making furnaces. The method adopts straight widened bricks and vertical and wide wedge bricks for bricklaying, and packs materials along the outside of a tubular brick and takes an outer ring of Phi 390mm to 410mmas as an inner circle control line of the original brick cup, and the specific method comprises: placing twelve 700mmx200mmx100mm No.1 straight widened bricks around the inner circle control line, laying 700mmx(165/135)mmx100mm No.2 vertical and wide wedge bricks at the outsides of the No.1 straight widened bricks, the No.1 straight widened bricks are engaged with the No.2 vertical and wide wedge bricks, brine magnesium quality slurries are filled between the bricks at the tap hole in the range of 1m in the center for wet bricklaying, redundant salient points in the inner circle control line are corrected by a drill bit of a furnace-bending machine after the bricklaying, then the whole tubular brick is layered, and magnesium materials are filled between the whole tubular brick and the No.1 straight widened bricks. The method reduces the cost of the tap hole by over 50 percent.

Description

Laying method of non pocket block tap hole for steel making converter

Technical field

The invention belongs to steel-making converter refractory brick and build the field by laying bricks or stones, specifically a kind of steel melting furnace tap hole building method that is applicable to.

Background technology

Before the present invention proposes, the structure of converter taphole nearly all is to be made of brick cup, filler, pipe brick both at home and abroad at present, particularly lay bricks in the converter taphole position, often suffer washing away of the molten steel of high temperature, life-span is very short generally at the 30-50 heat, therefore repeatedly repair even change during need using as a servant (reaching ten thousand heats) at stove, making it cost increases.

Behind the whole tap hole pipe brick (being generally ф 130/ ф 300mm) that adopts isostatic pressing to be shaped, it is convenient not only to change tap hole pipe brick, and prolongs at double work-ing life, and the pipe brick all reaches more than 120 heats work-ing life.Tap hole integral tube brick (inside and outside be donut) outer brick cup (being also referred to as the cover brick), be designed to " interior round foreign side " and shape, between tap hole pipe brick and brick cup, leave the gap that is convenient for changing the pipe brick, about general 50mm, tamp with magnesia material.When changing tap hole integral tube brick, the disassembling furnace machine that is equipped with drill bit is from the stove outer platform, to the residual brick of tap hole pipe brick hole (general about ф 400mm), after having bored the hole and having cleared up residual brick, the integral tube brick brick that is installed in band pallet steel pipe provoked stretch in the hole-drilled tap hole brick cup, again steel pipe trays and the spot welding of tap hole ring flange are connected and fixed.Converter is shaken to correct position, and is with spraying method that slit spray around the tap hole pipe brick is full, through 15-30 minute health drying, can drop into STEELMAKING PRODUCTION.

Though the life-span of integral tube brick has prolonged, owing to repeatedly when changing, need drilling operation, make life-span of the brick cup that tap hole integral tube brick is outer particularly important that seems.The particularly current segmentation brick cup that generally adopts is shaped with common brick pressing machine, and about every segment length 200mm, pressed density is not enough, and is second-rate.In addition, in furnace wall thickness (more than the 900mm), to build brick cup more than four sections, brick cup and not interlock of furnace wall around it, the integral body of formation, along with furnace lining is damaged, the repeatedly residual brick of brick cup comes off, cause the brick cup life-span not serve as a contrast synchronously, become the weak link that influences life of converter with converter.Current, the someone attempts to solve the scheme of these pressing issues, promptly adopts the whole tap hole brick cup of piecemeal scheme, and its cross section one of this structure is divided into four, but length direction is that 1200mm is long at least for integral body.This 1/4th brick cups, it is waste bad again through machining preferably adopting hydrostatic pressing.Because the piecemeal brick cup is a monocycle, has almost stopped residual brick and has come off, it is long more a lot of than segmentation brick cup to make that the life-span is certain to.If again four block bricks are bonded together, realize that it is to be easy to easily that hanging of whole tap hole transforms.But this whole tap hole brick cup also is in the conceptual level at present, and it has several problems to wait to solve: 1). must adopt isostatic pressing machine to be shaped, general refractory factory does not also possess this equipment.2). the isostatic pressing machine that can the suppress tap hole integral tube brick piecemeal brick cup (1/4th) that can be shaped, but the machining loss almost reaches 50%, the cost height, and price is increased thereupon.3). brick cup and brick wall brick layer separation around it, the integral body of formation, in the stove labour later stage, the tap hole brick cup might come off.

Summary of the invention

The objective of the invention is to cancel the current segmentation brick cup that generally adopts, a kind of building method of non pocket block tap hole is proposed, promptly directly build the brick cup position by straight shape brick and common perpendicular wide wedge brick, then by the disassembling furnace machine hole flushing, form with brick wall brick layer is the whole tap hole of no brick cup of one, to reduce cost, improve the synchronous life-span of tap hole and furnace lining.

Laying method of non pocket block tap hole for steel making converter, adopting straight shape to widen brick builds by laying bricks or stones with perpendicular wide wedge brick, and along managing the outer filler outer shroud Φ 390mm-410mm of brick as circle control line in the former brick cup, its concrete grammar is: the straight shape of 1# of building 12 700mm * 200mm * 100mm around interior round control line by laying bricks or stones is widened brick, widen the perpendicular wide wedge brick of the 2# that builds 700mm * (165/135) mm * 100mm outside the brick by laying bricks or stones the straight shape of 1#, the straight shape of 1# is widened brick with the perpendicular wide wedge brick interlock of 2#, in the 1m scope of tap hole center, adopt the wet block of the magnesia mud of bittern between brick, built unnecessary salient point lining damping pallet drill bit correction in the circle control line in the back by laying bricks or stones, build again and put the integral tube brick, and widen the magnesia material of filling between the brick at integral tube brick and the straight shape of 1#.

The straight shape of described 1# is widened brick and is adopted faulting of slab ends to build method, wherein 6 arrangements that the straight shape of 1# is widened brick, they have only an angle to contact with interior round control line point, 4 arrangements that the straight shape of 1# is widened brick, they have an angle in interior round control line, form salient point to revise in circle control line point contact, an angle forms salient point and will revise cutting in interior round control line in addition.

The present invention compares advantage and effect with traditional method: 1). and it is the same with brick with furnace wall to widen brick, adopts same brick pressing machine production, and performance index can reach product standard fully.2). compare processing loss with the piecemeal brick cup and reduce to below 10% by 50%.3). do not need to order specially brick cup.4). utilize the drill bit of the existing converter disassembling furnace machine of steel mill, do not increase any equipment.5). no brick cup is built the hole and furnace wall is interlocked, and has avoided the vertical masonry joint (not interlock) of former brick cup and furnace wall to produce the danger that comes off.6). owing to adopt monocycle, avoid the repeatedly residual brick of former segmentation brick cup to come off, the life-span can be synchronous with furnace lining.7). because above-mentioned 1), 2), with 3) advantage, make the tap hole cost reduce more than 50%.

Description of drawings

Back masonry construction synoptic diagram is revised in the boring of accompanying drawing 1 the utility model non pocket block tap hole

Masonry construction synoptic diagram before the boring of accompanying drawing 2 the utility model non pocket block tap holes is revised

Among the figure: pipe brick-1, filler-2, interior round control line-3, salient point-4,1# brick-5,2# brick-6.

Embodiment

The inventive method is in the former brick cup scope of converter taphole, with about the outer filler outer shroud ф 400mm of former pipe brick as circle control line in the former brick cup, the 1# that builds around the control line with 12 700mm (with the lining thickness coupling) * 200mm * 100mm widens brick, build the perpendicular wide wedge brick of 2# of 700mm * (165/135) mm * 100mm outside 1# widens brick, the 1# brick is with the interlock of 2# brick.1# widens brick and adopts faulting of slab ends to build method.6 1# bricks are pressed Fig. 2 and are arranged, and they do not need cutting; 4 1# bricks are pressed Fig. 2 and are arranged, and they need cutting; Cutting part is not more than 1/3rd of 1# full sized brick; 2 1# bricks are pressed Fig. 2 and are arranged, and they need cutting; Cutting part is not more than 1/4th of 1# full sized brick.In the one meter scope in tap hole center, adopt the wet block of the magnesia mud of bittern between brick, make masonry have certain intensity, create conditions for boring work.After the 1# brick is built by laying bricks or stones by Fig. 2, in former brick cup, justify in the control line, the hole of keeping somewhere approximate ф 400mm circle, the circle in redundance, treat that stove finishes building after, bore outside stove with disassembling furnace machine drill bit (about ф 400mm), so just, formed and the similar circular hole of former brick cup, promptly substituted former brick cup, subsequently with conventional tap hole build by laying bricks or stones the same, by block shown in Figure 1 with the integral tube brick and fill magnesia material.

Claims (2)

1. laying method of non pocket block tap hole for steel making converter, adopting straight shape to widen brick builds by laying bricks or stones with perpendicular wide wedge brick, and along managing the outer filler outer shroud Φ 390mm-410mm of brick as circle control line in the former brick cup, its concrete grammar is: the straight shape of 1# of building 12 700mm * 200mm * 100mm around interior round control line by laying bricks or stones is widened brick, widen the perpendicular wide wedge brick of the 2# that builds 700mm * (165/135) mm * 100mm outside the brick by laying bricks or stones the straight shape of 1#, the straight shape of 1# is widened brick with the perpendicular wide wedge brick interlock of 2#, in the 1m scope of tap hole center, adopt the wet block of the magnesia mud of bittern between brick, built unnecessary salient point lining damping pallet drill bit correction in the circle control line in the back by laying bricks or stones, build again and put the integral tube brick, and widen the magnesia material of filling between the brick at integral tube brick and the straight shape of 1#.

2. by the described laying method of non pocket block tap hole for steel making converter of claim 1, it is characterized in that: the straight shape of described 1# is widened brick and is adopted faulting of slab ends to build method, wherein 6 arrangements that the straight shape of 1# is widened brick, they have only an angle to contact with interior round control line point, 4 arrangements that the straight shape of 1# is widened brick, they have an angle in interior round control line, form salient point to revise in circle control line point contact, an angle forms salient point and will revise cutting in interior round control line in addition.

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