CN102040387A - Magnalium carbon refractory brick for improving quality of molten steel and prolonging service life of steel ladle and application method - Google Patents
Magnalium carbon refractory brick for improving quality of molten steel and prolonging service life of steel ladle and application method Download PDFInfo
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- CN102040387A CN102040387A CN2010105294234A CN201010529423A CN102040387A CN 102040387 A CN102040387 A CN 102040387A CN 2010105294234 A CN2010105294234 A CN 2010105294234A CN 201010529423 A CN201010529423 A CN 201010529423A CN 102040387 A CN102040387 A CN 102040387A
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Abstract
The invention provides a magnalium carbon refractory brick for improving quality of molten steel and prolonging service life of a steel ladle and an application method, belonging to the technical field of processing and application of shaped refractory materials. The magnalium carbon refractory brick comprises the following raw materials in percentage by weight: 10-13% of corundum, 65-75% of fused magnesite, 2-4% of spinel, 1-2% of alpha-alumina micro powder, 1-2% of metal silica powder, 2-3% of metal aluminum powder, 3-5% of resin, and the balance of crystalline flake graphite; and the magnalium carbon refractory brick comprises the following chemical components in percentage by weight: 65-75% of MgO, 12-17% of Al2O3, 1-3% of Al, 1-2% of Si and the balance of C. The invention has the advantages of reducing the pollution to the molten steel, reducing impurities in the steel, prolonging the service life of the steel ladle and reducing the production cost.
Description
Technical field
The invention belongs to processing of typing refractory materials and applied technical field, particularly relate to a kind of magnalium carbon refractory brick and application method that improves the molten steel quality, improves ladle life.
Background technology
Continuous development along with modern steel industry, requirement to steel quality is more and more higher, external refining is widely adopted as one of most important technology, and ladle is as a major equipment of external refining, and the refining condition that its inner lining refractory stood is also more and more harsher.How to accomplish the stable use of refractory materials, and be the problem that generally faces of iron and steel enterprise nowadays minimizing of polluting of molten steel.The damage factor of ladle liner refractory brick mainly contains slag corrosion, thermal shocking and mechanical erosion, and specifically damage mode is for infiltration and corrosionally structurally peel off and be parallel to the thermal spalling that the crack propagation of hot side causes.The magnalium material refractory brick of Shi Yonging is poor to removing steel inclusion effect of not having and resistance to fouling before this, easily molten steel is polluted.
Summary of the invention
The object of the present invention is to provide a kind of magnalium carbon refractory brick and application method that improves the molten steel quality, improves ladle life, realized that anti-slag corrosion performance is good, and can reduce ladle refractory brick molten steel pollution and long service life.
The material composition of magnalium carbon refractory brick of the present invention and weight percentage are corundum 10-13%, electrosmelted magnesite clinker 65-75%, spinel 2-4%, Alpha-alumina micro mist 1-2%, metallic silicon power 1-2%, metallic aluminium powder 2-3%, resin 3-5%, all the other are crystalline flake graphite, the chemical ingredients of magnalium carbon refractory brick and weight percentage are MgO:65-75%, Al
2O
3: 12-17%, Al:1-3%, Si:1-2%, all the other are C.
Using method of the present invention is:
(1) at first build pocket block and bottom blowing brick by laying bricks or stones, build bag wall working lining then by laying bricks or stones, bag wall working lining is built by laying bricks or stones and is adopted magnalium carbon refractory brick of the present invention, ladle wall laying 3-10 layer to begin to build by laying bricks or stones working lining at the bottom of the ladle bag;
(2) permanent layer tiling one deck dry type ramming material at the bottom of the bag of ladle;
(3) complete dry type ramming material after, begin to build by laying bricks or stones working lining at the bottom of the ladle bag;
(4) built by laying bricks or stones at the bottom of the ladle bag and begun to continue to build by laying bricks or stones ladle wall, ladle slag line and ladle bag edge behind the working lining;
(5) built by laying bricks or stones the ladle bag along after begin to spray ladle bag edge, in spray material, add the steel fiber of 1-3 weight %, be sprayed on the ladle bag along last, improved the globality on ladle bag edge;
(6) sprayed the ladle bag along after ladle is toasted, can drop into online use after the baking.
The invention has the advantages that, reduce molten steel is polluted, reduces steel inclusion, improve ladle integral work-ing life, reduce production costs.
Embodiment
Adopt magnalium carbonaceous refractory brick of the present invention, cooperate corresponding improvement measures, use at the Shoudu Iron and Steel Co second steelworks 225t ladle, ladle periodical repair pattern according to 22+22+22+22=88 time, be that light maintenance (refer to change ladle in local anti-material) is for the first time when (22 times), change the bilateral gas permeable brick, during the light maintenance second time (44 times), change bag bottom all anti-materials of position and slag lining refractory brick, light maintenance is for the third time when (66 times), change the bilateral gas permeable brick, repair (referring to change the anti-material of all working layer in the ladle), 23 of use in the time of 88 times
#Ladle, this ladle with the magnesia-alumina-carbon brick proportioning raw materials is: corundum 12%, electrosmelted magnesite clinker 73%, spinel 4%, Alpha-alumina micro mist 2%, metallic silicon power 1.5%, metallic aluminium powder 2.6%, resin 4.1%, other are crystalline flake graphite, life-span reaches 88 stoves, LF stove number of processes 74 times, the ladle Sheng steel time reaches 13200min, and residual brick thickness is 60mm, erosion rate 1.25mm/ stove, the more former magnalium carbon of ladle life material improves 43.18%.
Be concrete constructing operation requirement below
The constructing operation requirement
1. preparation work:
1.1 instrument is prepared: welding machine, hand hammer, pneumatic pick, spade, vibrating head, inferior son (trowel), big shovel, survey instrument etc.
1.2 refractory materials is prepared: according to the requirement that ladle is built by laying bricks or stones, be ready to required refractory materials, and check on request whether the visual appearance of material reaches the use standard.
1.3 cleaning: the foreign material in inclusion, the bag are cleaned out, guaranteed that the involucrum breather hole is unobstructed.
2. building by laying bricks or stones of pocket block:
2.1 check the metal brick cup, guarantee not have situations such as ftractureing, be out of shape, snap, setting accuracy requires female mouthful of tip-to-face distance mechanism of metal brick cup fixed frame datum plate height below 125mm, and the size fluctuation that measure any position is in 1mm.
2.2 on the metal brick cup, smear plasticity magnesia mud, will descend pocket block to put in the iron brick cup, rotate brick cup, chamotte is well contacted with brick cup, and brick cup to be confirmed; Require slit≤2mm.
2.3 evenly smear a layer plasticity magnesia mud at last brick cup, then on the tangible brick cup down of seat; Last brick cup will with following brick cup centering, concentric, do not go out step.
2.4 the gap between the brick is filled, is irritated tight, beats in fact with alumina-magnesia castable around the brick cup and at the bottom of the permanent layer bag.
3. building by laying bricks or stones of gas permeable brick:
3.1 will clean out at the gas permeable brick position that the bag end is reserved.
3.2 with overhead traveling crane handling gas permeable brick, the gas permeable brick steel pipe is aimed at bag end pre-opened hole puts into, the real and levelling of seat.
3.3 can not seat real as gas permeable brick, can spread the thick magnalium green brick of alumina-magnesia castable or 30mm levelling, to be paved with between bag end steel plate.
3.4 fill with corundum castable in around the brick cup and the gap of bag at the end, irritates tight, beats in fact.
4. wrap building by laying bricks or stones of end working lining:
4.1 the flat working lining of building is built by laying bricks or stones at the bag end:
4.1.1 begin to build by laying bricks or stones bag end working lining after more than 3 layers building bag wall working lining by laying bricks or stones.
4.1.2 check bag end permanent layer, meeting is uneven must repair.
4.1.3 in the thick dry type material levelling of bag permanent layer upper berth, end one deck 5mm.
4.1.4 the flat working lining of building adopts common magnalium green brick to build by laying bricks or stones at the bag end, is begun to build by laying bricks or stones by pocket block, building thickness by laying bricks or stones is 30mm.Require when building by laying bricks or stones the brick face smooth, step do not appear.
4.2 bag end laid on end working lining is built by laying bricks or stones:
4.2.1 build the laid on end working lining again after finishing building flat block bag end working lining.
Adopt 4 kinds of brick types to cooperate to build by laying bricks or stones, begin to build by laying bricks or stones 4.2.2 build working lining by laying bricks or stones by pocket block, between the pocket block and the brick between two bottom blowing bricks for vertically building by laying bricks or stones, the brick at other positions is for laterally building by laying bricks or stones; Require the brick face smooth when building by laying bricks or stones, step do not occur.
4.2.3 and reserve 40 ± 5mm slit between the bag wall working lining, irritate tight, play real, levelling with brickbat card jail and with alumina-magnesia castable.
The ladle wall working lining, go up building by laying bricks or stones of slag line, bag edge:
5.1 after having built the bag end flat block working lining by laying bricks or stones, begin to build by laying bricks or stones.
5.2 the starting of ladle wall working lining is adopted flat the block for four layers.
5.3 will clear up and check repairing to the bag wall permanent layer before building bag wall working lining by laying bricks or stones, use magnesia mud during repairing.
5.4 the ladle wall working lining adopts magnalium carbonaceous wedge type brick annular to build by laying bricks or stones, closes door layer by layer, the He Men position must be in ladle gudgeon one side, must stagger more than the 800mm in adjacent two laminated positions up and down.
5.5 use two or more brick type collocation to use in building by laying bricks or stones, obvious faulting of slab ends can not appear in every layer of bag inwall.
5.6 the ladle slag line working lining adopts wedge type brick annular to build by laying bricks or stones, closes door layer by layer, the He Men position must be in ladle gudgeon one side, must stagger more than the 800mm in adjacent two laminated positions up and down.
5.7 horizontal, vertical brickwork joint general requirement≤1mm; The perps of last slag line brick, ladle wall working lining all adopts laid dry, the magnalium chamotte mud cementation of fissures, brickwork joint requirement≤0.5mm.
Fix steel plate 5.8 will add weldering during the package mouth, and expect the ladle bag along spraying with the bag edge on request.
6. enclose building by laying bricks or stones of jar:
6.1 on bag end laid on end working lining, be close to the ladle wall working lining and build by laying bricks or stones:
Build by laying bricks or stones 6.2 adopt two kinds of brick types to cooperate, big or middle repair to wrap build by laying bricks or stones two-layerly, the light maintenance bag is built three layers by laying bricks or stones.
6.3 enclosing between jar brick and the ladle wall working lining for every layer, the light maintenance bag attacks severely reality with the alumina-magnesia castable filling.
7. ladle baking:
Ladle liner carries out large repairs, in repair or light maintenance after just can come into operation after will toasting, concrete baking requires as follows:
Ladle has been built back baking system by laying bricks or stones:
The light maintenance ladle baking time: big fire 8 hours
In repair the ladle baking time: big fire: 8 hours
The overhaul ladle baking time: big fire: 16 hours
8. ladle is built the periodical repair pattern by laying bricks or stones:
The periodical repair pattern of ladle depends on the work-ing life of bottom blowing brick and the multiple factors such as erosive velocity of cylinder-packing working lining, be divided into overhaul, in repair, light maintenance.
9. ladle is built classification by laying bricks or stones:
9.1 light maintenance ladle: the ladle that refers to the anti-material of cylinder-packing is carried out sectional repair.
9.2 in repair ladle: the ladle that refers to change the whole working linings of cylinder-packing.
9.3 overhaul ladle: the ladle that refers to change all anti-materials.
9.4 periodical repair ladle: refer to getting rid of the ladle that bag is changed bag end working lining, bottom-blown air brick, pocket block, enclosed jar according to plan.
10. ladle liner is repaired:
10.1 the repairing of working lining and permanent layer requires:
Determine to repair the position, remove the not damage brick that a damaged location and a circle are adjacent, remove neat stubble; Build new brick by laying bricks or stones, note repairing the processing in slit, border, position, accomplish that mud is full, and fill up and irritate real.
10.2 the repairing of bottom blowing brick, replacing:
When removing old bottom blowing brick, can not damage cylinder-packing on every side, change the bottom blowing brick, with building requirement by laying bricks or stones.
The relevant regulations during 11. ladle is built by laying:
11.1 want strict when building bag and implement that mud is full, the back of the body strikes the 16 word policies that brick face, brickwork joint stagger near real, hammer.
11.2 ladle turnover card is filled in and is wanted accurately, in time, transmitting will be according to the order of sequence, must not lose and damage, misremember.
11.3 ladle wall or bag can be built by laying work if any being stained with after the steel dry slag will be handled along last.Also to just can build by laying bricks or stones after thoroughly clearing up during the overhaul ladle indentured, bag ear.
Claims (2)
1. magnalium carbon refractory brick that improves the molten steel quality, improves ladle life, it is characterized in that, the material composition of magnalium carbon refractory brick and weight percentage are: corundum 10-13%, electrosmelted magnesite clinker 65-75%, spinel 2-4%, Alpha-alumina micro mist 1-2%, metallic silicon power 1-2%, metallic aluminium powder 2-3%, resin 3-5%, all the other are crystalline flake graphite, the chemical ingredients of magnalium carbon refractory brick and weight percentage are MgO:65-75%, Al
2O
3: 12-17%, Al:1-3%, Si:1-2%, surplus is C.
2. the application method of the described magnalium carbon refractory brick of claim 1 is characterized in that, uses step to be:
(1) at first build pocket block and bottom blowing brick by laying bricks or stones, build the ladle wall working lining then by laying bricks or stones, the ladle wall working lining is built by laying bricks or stones and is adopted magnalium carbon refractory brick, ladle wall laying 3-10 layer to begin to build by laying bricks or stones working lining at the bottom of the ladle bag;
(2) tiling one deck dry type ramming material at the bottom of the bag of ladle;
(3) complete dry type ramming material after, begin to build by laying bricks or stones working lining at the bottom of the ladle bag;
(4) built by laying bricks or stones at the bottom of the ladle bag and begun to continue to build by laying bricks or stones ladle wall, ladle slag line and ladle bag edge behind the working lining;
(5) built by laying bricks or stones the ladle bag along after begin to spray ladle bag edge, in spray material, add the steel fiber of 1-3 weight %, be sprayed on the ladle bag along last, improved the globality on ladle bag edge;
(6) sprayed the ladle bag along after ladle is toasted, online use is dropped in baking back.
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| CN2010105294234A CN102040387A (en) | 2010-10-28 | 2010-10-28 | Magnalium carbon refractory brick for improving quality of molten steel and prolonging service life of steel ladle and application method |
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| CN2010105294234A CN102040387A (en) | 2010-10-28 | 2010-10-28 | Magnalium carbon refractory brick for improving quality of molten steel and prolonging service life of steel ladle and application method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102633514A (en) * | 2012-05-14 | 2012-08-15 | 攀枝花市银江金勇工贸有限责任公司 | Titaniferous-spinel-added gunning mix for steel converter |
| CN103420683A (en) * | 2012-05-18 | 2013-12-04 | 德清县钢友耐火材料有限公司 | Tundish low-carbon corundum spinel impact brick and preparation method thereof |
| CN103641498A (en) * | 2013-11-18 | 2014-03-19 | 安徽省萧县华龙耐火材料有限责任公司 | Integrated converter tapping hole ramming brick cup and production method thereof |
| CN103979992A (en) * | 2014-06-09 | 2014-08-13 | 武汉科技大学 | Ladle porous brick and preparation method thereof |
| CN104744053A (en) * | 2013-12-25 | 2015-07-01 | 营口东邦冶金设备耐材有限公司 | Anti-scouring tapping hole sleeve brick |
| CN106242601A (en) * | 2016-08-09 | 2016-12-21 | 宿州市威菱耐火材料有限责任公司 | A kind of resistant to elevated temperatures tapping hole brick cup and preparation method |
| CN107954748A (en) * | 2015-12-30 | 2018-04-24 | 苏州大学 | Anti-slag invades refractory material |
| CN112643018A (en) * | 2020-12-09 | 2021-04-13 | 攀枝花钢城集团有限公司 | Method for building long-life ladle bottom of ladle |
| CN113233874A (en) * | 2021-04-22 | 2021-08-10 | 本溪市众信冶金炉料有限公司 | Processing and using process of long-life steelmaking tundish dry material |
| CN113816726A (en) * | 2021-09-03 | 2021-12-21 | 山东柯信新材料有限公司 | Novel steel tapping hole and preparation method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102633514A (en) * | 2012-05-14 | 2012-08-15 | 攀枝花市银江金勇工贸有限责任公司 | Titaniferous-spinel-added gunning mix for steel converter |
| CN102633514B (en) * | 2012-05-14 | 2013-10-30 | 攀枝花市银江金勇工贸有限责任公司 | Titaniferous-spinel-added gunning mix for steel converter |
| CN103420683A (en) * | 2012-05-18 | 2013-12-04 | 德清县钢友耐火材料有限公司 | Tundish low-carbon corundum spinel impact brick and preparation method thereof |
| CN103641498A (en) * | 2013-11-18 | 2014-03-19 | 安徽省萧县华龙耐火材料有限责任公司 | Integrated converter tapping hole ramming brick cup and production method thereof |
| CN104744053A (en) * | 2013-12-25 | 2015-07-01 | 营口东邦冶金设备耐材有限公司 | Anti-scouring tapping hole sleeve brick |
| CN103979992B (en) * | 2014-06-09 | 2015-04-29 | 武汉科技大学 | Ladle porous brick and preparation method thereof |
| CN103979992A (en) * | 2014-06-09 | 2014-08-13 | 武汉科技大学 | Ladle porous brick and preparation method thereof |
| CN107954748A (en) * | 2015-12-30 | 2018-04-24 | 苏州大学 | Anti-slag invades refractory material |
| CN107954748B (en) * | 2015-12-30 | 2020-01-14 | 苏州大学 | Slag-corrosion-resistant refractory material |
| CN106242601A (en) * | 2016-08-09 | 2016-12-21 | 宿州市威菱耐火材料有限责任公司 | A kind of resistant to elevated temperatures tapping hole brick cup and preparation method |
| CN112643018A (en) * | 2020-12-09 | 2021-04-13 | 攀枝花钢城集团有限公司 | Method for building long-life ladle bottom of ladle |
| CN113233874A (en) * | 2021-04-22 | 2021-08-10 | 本溪市众信冶金炉料有限公司 | Processing and using process of long-life steelmaking tundish dry material |
| CN113816726A (en) * | 2021-09-03 | 2021-12-21 | 山东柯信新材料有限公司 | Novel steel tapping hole and preparation method |
| CN113816726B (en) * | 2021-09-03 | 2023-01-10 | 山东柯信新材料有限公司 | Steel tapping hole and preparation method |
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Application publication date: 20110504 |