CN102297594B - Masonry method of RH refining furnace capable of reducing consumption of refractory materials - Google Patents

Masonry method of RH refining furnace capable of reducing consumption of refractory materials Download PDF

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Publication number
CN102297594B
CN102297594B CN 201110202180 CN201110202180A CN102297594B CN 102297594 B CN102297594 B CN 102297594B CN 201110202180 CN201110202180 CN 201110202180 CN 201110202180 A CN201110202180 A CN 201110202180A CN 102297594 B CN102297594 B CN 102297594B
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China
Prior art keywords
brick
bricks
working lining
masonry
magnesite
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CN 201110202180
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Chinese (zh)
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CN102297594A (en
Inventor
王峰
耿立唐
杨晓江
么洪勇
张彩东
张大勇
李军明
苗保利
周晓红
崔宝民
王广忠
马慧竹
刘广涛
席晓利
刘曙光
刘少芹
卢彬
韩志彦
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河北钢铁股份有限公司唐山分公司
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Priority to CN 201110202180 priority Critical patent/CN102297594B/en
Publication of CN102297594A publication Critical patent/CN102297594A/en
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Publication of CN102297594B publication Critical patent/CN102297594B/en

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Abstract

The invention relates to a masonry method of an RH refining furnace capable of reducing consumption of refractory materials, belonging to the technical field of metallurgy external refining refractory material masonry. The technical scheme comprises the following steps: carrying out fire-proof brick masonry by in a break joint mode in the masonry process of a vacuum groove; digging only a part of circulation tubular bricks and working lining magnesite chrome bricks right above without removing all the working lining magnesite chrome bricks right above the circulation tubular bricks in replacing a dip pipe, wherein the size of the dug part is just the size which ensures that the dip pipe can be taken out; and repairing and recovering the tubular bricks and the dug working lining magnesite chrome bricks right above after the dip pipe is replaced. The method provided by the invention has the beneficial effects that because a trigonum digging and repairing method is adopted, namely a break joint masonry mode is adopted by utilizing the upper layer bricks and the lower layer bricks, a digging and repairing mode similar to a pyramid type is adopted, thus the number of bricks dug in the upper layer working lining is reduced, the improper offline amount of magnesite chrome bricks is reduced effectively, the using amount of the magnesite chrome bricks is saved, the masonry cost is lowered, the labor intensity of workers is relieved, and the aims of rapid repairing and replacing the dip pipe are achieved.

Description

A kind of RH refining furnace building method that can reduce refractory consumption

Technical field

The present invention relates to a kind of RH refining furnace building method that can reduce refractory consumption, belong to the metallurgical external refining masonry technology of anti-material field.

Background technology

In STEELMAKING PRODUCTION, the RH(vacuum outgas) use refractory material to be the magnesium chrome refractory with vacuum tank, because chrome ore is comparatively rare, so the magnesium chrome refractory is expensive.In vacuum tank bottom, a pair of dip pipe is arranged, be respectively tedge and down-comer, its life-span is 70 stoves left and right approximately, thereby need frequent the replacing.And dip pipe and bottom land connection request precision are very high, adopt between the steel body to be welded to connect, and between inner brick and brick, the gap is less than 0.5mm, and rolling off the production line at each dip pipe need to cut down the dip pipe that rolls off the production line when repairing, and the superiors' two ring circulating pipe bricks are pulled down; Because this two rings circulating pipe brick is the working lining brick of bottom land, there is the working lining brick of bottom cell wall to be pressed in above the circulating pipe brick in thing both sides, so want to change the circulating pipe brick, just must all change (as shown in Figure 1) to all working layer magnesite-chrome brick directly over circulating pipe.So this just causes the working lining magnesite-chrome brick that originally should not change to roll off the production line in advance, lower channel working lining brick ordinary life is 2 ~ 3 times of dip pipe, has caused extra loss, and causes and repair the time build by laying bricks or stones and workman's labour intensity increases.

Summary of the invention

The object of the invention is to provide a kind of RH refining furnace building method that can reduce refractory consumption, reduce the improper quantity that rolls off the production line of magnesite-chrome brick, reduced the labour intensity of building cost by laying bricks or stones, having alleviated the workman, Rapid-Repair is changed dip pipe, solves the problems referred to above that exist in background technology.

Technical scheme of the present invention is:

A kind of RH refining furnace building method that can reduce refractory consumption, vacuum tank are in building process, and refractory brick adopts fissure of displacement mode to build by laying bricks or stones; When changing dip pipe, do not need all working layer magnesite-chrome brick complete removal directly over the circulating pipe brick, only with the circulating pipe brick and directly over the working lining magnesite-chrome brick cut out a part, the size of cutouts get final product dip pipe can be taken out; After changing dip pipe, with the circulating pipe brick and directly over the working lining magnesite-chrome brick that cuts out build by laying recovery.

Said with the circulating pipe brick and directly over the working lining magnesite-chrome brick cut out a part, what cut out a part is shaped as similar triangle, the circulating pipe brick is similar leg-of-mutton base.

When changing dip pipe, the circulating pipe brick and directly over the working lining magnesite-chrome brick adopt pyramid to dig the mode of repairing, the brick number that the upper strata working lining is dug repair reduces gradually, effectively reduced the improper quantity that rolls off the production line of magnesite-chrome brick, not only reduce the labour intensity of building cost by laying bricks or stones, having alleviated the workman, and reached the purpose of Rapid-Repair replacing dip pipe.

In building process, refractory brick adopts fissure of displacement mode to build by laying bricks or stones due to vacuum tank, makes to cut out a part of refractory brick and be achieved.

For preventing that caving in appears in refractory brick in digging the process of repairing, utilize the support mold to support.

Adopt the present invention, should rationally control the splash of slag in the vacuum tank use procedure, optimize roll off the production line front cell wall and the cold steel of bottom land of vacuum tank and remove technique; Prevent that by regulating the means such as vacuum slag from splashing to cell wall at vacuum tank between the normal operating period, need in addition vacuum tank roll off the production line front rational top gun gun bit and blowing oxygen quantity, guarantee that the cold steel of cell wall and bottom land cleans out, avoid the part to dig slag or the related unplanned groove brick of repairing that digs of dismantling of cold steel in the Xiu Shiyin groove.

Beneficial effect of the present invention: owing to adopting the trigonum to dig the method for repairing, the mode of namely utilizing the levels brick to adopt the fissure of displacement to build by laying bricks or stones, take the mode of repairing of digging of similar pyramid, the brick number that the upper strata working lining is dug repair reduces gradually, effectively reduced the improper quantity that rolls off the production line of magnesite-chrome brick, saved the usage quantity of magnesite-chrome brick, reduced and built cost by laying bricks or stones, alleviate workman's labour intensity, and reached the purpose of Rapid-Repair replacing dip pipe.

Description of drawings

Fig. 1 is the vacuum tank lower channel dip pipe schematic diagram of anti-the material;

Fig. 2 is that background technology need to be dug up the refractory brick schematic diagram;

Fig. 3 is that the embodiment of the present invention is dug up the refractory brick schematic diagram;

In figure: working lining 1, circulating pipe brick 2, dip pipe 3, the refractory brick 4 that need to dig up, similar delta-shaped region 5.

The specific embodiment

The invention will be further described by the following examples.

In an embodiment, the concrete technology step is as follows:

1. staggered joint type is built by laying bricks or stones: in the vacuum tank building process, refractory brick adopts fissure of displacement masonry way, not only can increase fastness and the corrosion resistance of vacuum tank refractory material for working layer, and can adopt when changing dip pipe and dig the mode of repairing and save refractory material and establish architecture basics;

2. pyramid digs and repaiies: after pipe to be impregnated reaches service life, with the vacuum tank replacing dip pipe that rolls off the production line; If not adopting pyramid to dig repaiies, need and all to dismantle from the groove brick of bottom land and the tangent and relevant portion of dip pipe to the groove brick on lower channel top, be replaced with new groove brick (as shown in Figure 3), as seen not only waste does not reach the groove brick in life-span in a large number, and increased workman's the amount of labour, extended the maintenance cycle of anti-the material; The present embodiment adopts pyramid to dig and repaiies, the mode of namely utilizing the levels brick to adopt the fissure of displacement to build by laying bricks or stones, take the mode of repairing (as shown in Figure 3) of digging of similar pyramid, utilize supporting tire to support, the brick number that the upper strata working lining is dug repair reduces, and has effectively reduced the improper quantity that rolls off the production line of magnesite-chrome brick, has reduced and has built cost by laying bricks or stones, and alleviated workman's labour intensity, arrived the purpose of Rapid-Repair replacing dip pipe.

The embodiment economic benefit:

(1) cost of anti-the material:

Magnesite-chrome brick price: 7350 yuan/tons.

Dig before improvement and repair (tedge or down-comer one side) and need to change lower channel working lining refractory brick quantity: 14 * 20 layers=280, both sides are dug to repair to dig and are repaiied 280 * 2 sides=560 piece.

The monolithic brick is heavy: 8.3kg.

Dig after improvement to repair and to change lower channel working lining refractory brick quantity: about 60 * 2 side=120 piece.

RH is by 350 furnace gauges calculations per month, and every cover dip pipe life-spans 70 furnace gauge is calculated, the dip pipe that rolls off the production line per month=350/70=5 cover.

Annual cost-saved: (-120/cover of 560/the cover) * 8.3kg/ piece * 7.35 yuan/Kg * 5 cover/moon * December/year=1,610,000 yuan/year.

(2) work time cost reduces:

Adopt pyramid to dig and repair, can save cost of labor 5 man day/cover, work time cost be 100 yuan/man day/.

Can save work time cost the whole year: 5 the man day/cover * 100 yuan/man day/* 5 cover/moon * December/year=30,000 yuan/year.

(3) add up to benefit: 1,610,000 yuan/year+30,000 yuan/year=1,640,000 yuan/year.

Claims (4)

1. RH refining furnace building method that can reduce refractory consumption is characterized in that: vacuum tank is in building process, and refractory brick adopts fissure of displacement mode to build by laying bricks or stones; When changing dip pipe, do not need all working layer magnesite-chrome brick complete removal directly over the circulating pipe brick, only with the circulating pipe brick and directly over the working lining magnesite-chrome brick cut out a part, the size of cutouts get final product dip pipe can be taken out; After changing dip pipe, with the circulating pipe brick and directly over the working lining magnesite-chrome brick that cuts out build by laying recovery.
2. according to claim 1 the RH refining furnace building method that can reduce refractory consumption, it is characterized in that said with the circulating pipe brick and directly over the working lining magnesite-chrome brick cut out a part, cut out the similar triangle that is shaped as of a part, the circulating pipe brick is similar leg-of-mutton base.
3. according to claim 2 the RH refining furnace building method that can reduce refractory consumption, when it is characterized in that changing dip pipe, the circulating pipe brick and directly over the working lining magnesite-chrome brick adopt pyramid to dig the mode of repairing, the brick number that the upper strata working lining is dug repair reduces gradually, has effectively reduced the improper quantity that rolls off the production line of magnesite-chrome brick.
4. the described RH refining furnace building method that can reduce refractory consumption according to claim 1 and 2, is characterized in that for preventing that caving in appears in refractory brick in digging the process of repairing, and utilizes to support mold and support.
CN 201110202180 2011-07-19 2011-07-19 Masonry method of RH refining furnace capable of reducing consumption of refractory materials CN102297594B (en)

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CN102297594B true CN102297594B (en) 2013-06-19

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Publication number Priority date Publication date Assignee Title
CN102941341A (en) * 2012-10-12 2013-02-27 酒泉钢铁(集团)有限责任公司 Method for locally repairing bricked ladle working liner
CN107779556A (en) * 2016-08-31 2018-03-09 鞍钢股份有限公司 A kind of RH refining furnace vacuum chambers base channel restorative procedure
CN106312035B (en) * 2016-09-30 2018-08-21 北京利尔高温材料股份有限公司 A kind of repairing method of ladle slag line position circumferential weld
CN107177719B (en) * 2017-05-19 2018-11-16 中钢集团耐火材料有限公司 A kind of quick change method of vacuum refining furnace circulating pipe refractory material

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JPH059553A (en) * 1991-06-27 1993-01-19 Nippon Steel Corp Method for repairing immersion tube
JPH101714A (en) * 1996-06-10 1998-01-06 Kurosaki Refract Co Ltd Immersion tube for treating molten metal
CN201128745Y (en) * 2007-11-22 2008-10-08 宝山钢铁股份有限公司 Large circulation dip pipe for vacuum degassing device
CN101457279A (en) * 2007-12-12 2009-06-17 鞍钢股份有限公司 Method for improving RH vacuum furnace bottom groove life
CN101748246B (en) * 2008-12-15 2012-02-01 鞍钢股份有限公司 Method for improving service life of insert tube of vacuum degassing furnace

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Address after: 063016 Binhe Road, Hebei, Tangshan City, No. 9

Patentee after: River steel Limited by Share Ltd Tangshan branch

Address before: 063016 Binhe Road, Hebei, Tangshan City, No. 9

Patentee before: Hebei Steel Co., Ltd., Tangshan Branch