CN102491765A - Main ditch self-flowing anti-blowout pour material of main channel and construction method thereof - Google Patents
Main ditch self-flowing anti-blowout pour material of main channel and construction method thereof Download PDFInfo
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- CN102491765A CN102491765A CN2011103913770A CN201110391377A CN102491765A CN 102491765 A CN102491765 A CN 102491765A CN 2011103913770 A CN2011103913770 A CN 2011103913770A CN 201110391377 A CN201110391377 A CN 201110391377A CN 102491765 A CN102491765 A CN 102491765A
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- mould material
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- tap drain
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Abstract
The invention relates to a main ditch self-flowing anti-blowout pour material and a construction method thereof, which solve the problems that an existing main ditch pour material is long in maintaining and baking time and incapable of performing quick baking after pouring so as to cause blowout, reduce material strength and shorten service life. The technical scheme is that the main ditch self-flowing anti-blowout pour material comprises, by weight, 60-80 parts of electric smelting low-carbon brown fused alumina, 15-30 parts of silicon carbide, 1-3 parts of binding agent, 2-7 parts of ultramicro powder, 0.2-2.2 parts of antioxidant, 0.1-1.55 parts of anti-blowout agent and 0.1-0.25 part of water reducing agent. The main ditch self-flowing anti-blowout pour material is low in cost, simple in ingredients and construction method, short in baking time, high in material strength and long in service life.
Description
Technical field
The present invention relates to a kind of refractory materials and constructional method thereof, specifically flow automatically explosion-proof mould material and constructional method thereof of tap drain.
Background technology
Modern large blast furnace casting house generally all is to adopt low cement to combine Al
2O
3-SiC-C matter is hanged down cement deposit material, and this material is safe in utilization, and the life-span is long, consumes to lack, and it is easy to maintenance to construct, and is the important assurance of blast furnace stable yields, natural labor.But the greatest problem of this material is that cast back maintenance, storing time are long, can not carry out quick baking, otherwise can cause explosion, reduces the strength of materials and work-ing life.And for the medium and small blast furnace of Shuan Tiekou, single iron mouth; Its tap drain need be repaired fast; Engineering time is short; Therefore can not guarantee general mould material construct needed maintenance, storing time, so the medium and small blast furnace iron runner of present Shuan Tiekou, single iron notch generally still adopts pitch or resin-bonded Al
2O
3-SiC-C matter exempts to toast ramming mass ramming tap drain liner.Needn't toast after the ramming mass ramming construction or slightly the short period of time baking can directly immediately cross molten iron, in can satisfying, the use processing requirement of small furnace.But because the ditch lining refractories of ramming generally just ditch basal surface one deck is closely knit relatively, and below the top layer and ditch group position is all very loose, not anti-washing away, so there is too short problem in work-ing life in ramming mass, generally has only 1～7 day, the shortest in addition 1 class one repair.Therefore, cleek surfaceman labour intensity is too big before single iron mouth State of Blast Furnace of ramming mass ramming, and the environment of high heat causes a lot of unsafe factors again, also has the flue dust poisonous and harmful problem of pitch and resin.Therefore, develop a kind of can under hot, construct, be rapidly heated the baking and the unburstable mould material to labour intensity before alleviating medium and small State of Blast Furnace, improve construction environment and be significant.
Summary of the invention
The objective of the invention is in order to solve the problems of the technologies described above the tap drain of provide that a kind of cost is low, component is simple, constructional method is simple, storing time is short, scour resistance is good, the life-span the is long explosion-proof mould material of flowing automatically.
Another object of the present invention provides the constructional method of above-mentioned mould material.
Mould material of the present invention is made up of following weight percentages: electric smelting low-carbon (LC) palm fibre corundum 60～80, silit 15～30, wedding agent 1～3, super-fine powder 2～7, inhibitor 0.2～2.2, detonation suppressor 0.1～1.55, water reducer 0.1～0.25.
Described detonation suppressor is the mixture of metal A l powder and explosion-proof fiber.
Said metal A l powder with the mixing quality ratio of explosion-proof fiber is: 2～4: 1.
Particle diameter particle diameter A accounts for 20～35% in the said metal A l powder, and particle diameter B accounts for 65～80%, particle diameter 74 μ＜A≤300 μ wherein, particle diameter B≤74 μ, the weight ratio of preferred A: B be 1: 2～
Said super-fine powder is Al
2O
3Micro mist, SiO
2The mixture of micro mist and silicon carbide micro-powder, its weight ratio are 3～2: 2～1: 1.
Said electric smelting low-carbon (LC) palm fibre corundum by C, D, three kinds of size compositions of E is: 8mm>=C＞5mm account for 20～50% mass percents, 5mm>=D＞3mm account for 20～30% mass percents, E≤3mm account for 20～50% mass percents (preferred 30～50%).
Said silit by F, G, three kinds of size compositions of H is: 1mm>=F＞0.074mm account for 40～60%, 0.074mm>=G＞0.045mm account for 20～40%, H≤0.045mm account for 10～30%.
Said wedding agent is preferably pure calcium aluminate cement.
Described inhibitor is metal Si powder and B
4The mixture of C micro mist, the two mixed weight ratio is 9～11: 1.
Above-mentioned percentage ratio is weight percentage.
The flow automatically constructional method of explosion-proof mould material of above-mentioned tap drain comprises the steps:
1) each mould material of claim 1～9 is added in forced mixer stirs, and the water that adds mould material weight 5～5.5% stirs, then with its continuously poured in main iron hook bottom of trench and ditch lining, the gravity flow moulding need not vibration;
2) behind the tap drain casting, ambient cure demoulding after 0.5～1 hour.Mould material surfacing, flawless after the demoulding;
3) promptly toasted 0.5 hour after the mould material demoulding, carry out the big fire baking with 800 ℃ temperature again and can come into operation after 2～3 hours with 400 ℃ temperature.
In order to reduce the storing time after the cast; The just essential explosion-proof performance that improves mould material; The contriver discovers in detonation suppressor on the basis of using conventional explosion-proof fiber, adds metal A l powder, can utilize its hydration reaction; In mould material, produce gas passage during construction, help the diffusion of water vapor in the quick baking process.The process of metal A l powder and water reaction simultaneously also can produce great amount of heat, can effectively promote the snap cure of mould material.Metal A l powder, explosion-proof fiber are by weight 2～4 in the described detonation suppressor: 1 mixes; Be preferably 3: 1, this ratio can not be too high, and the gas that discharges when exceeding metal A l powder aquation when then toasting is many; Be prone to cause the generation of crackle; Cross that low then pore is few, the mould material explosion-proof performance is poor, and organic fibre increases the flowability that influences mould material in addition; Further, metal A l powder preferably exists with the mixed form of two kinds of granularities, and wherein granularity A (≤300 μ＞74 μ) accounts for 20～35% of metal A l powder gross weight, and the surplus granularity is≤74 μ, need carry out pre-mixing earlier during use, guarantees that both are uniformly dispersed.Its mechanism of action is the metal A l powder of a circle small particle size of distributing around the big particle diameter metal A l powder; So; To form gas cell distribution inhomogeneous for aquation in the time of can avoiding single big particle diameter in the bake process, or local vp is big during single small particle size, and water vapor can not in time be discharged and the explosion that causes.
Described wedding agent is a pure calcium aluminate cement, and its setting time scope is 0.5～2 hour.Adopt pure calcium aluminate cement bonded Al
2O
3-SiC-C matter mould material can significantly reduce obnoxious flavour that construction process medium pitch, resin produce, improve construction environment and stokehold labour intensity; Secondly, this hardening of cement time is very fast, and casting material strength is high, can carry out quick baking and not explosion.
Described super-fine powder is active A l
2O
3Micro mist, SiO
2The mixture of micro mist, silicon carbide micro-powder, preferably its weight ratio is 3～2: 2～1: 1, adopt the mixing super-fine powder to can further improve mould material density, flowability, alleviate construction intensity.
Described inhibitor is metal Si powder and B
4The mixture of C micro mist, the two ratio are 9～11: 1.Metal Si powder, B
4The C micro mist is in the high temperature use, and the two oxidation generates SiO
2, B
2O
3Eutectic can stop up pore, improves material density, secondly, generates SiO
2, B
2O
3Eutectic also can with Al
2O
3Reaction generates 2Al
2O
33SiO
2, 9Al
2O
32B
2O
3The column crystal palpus plays toughening effect, improves the strength of materials.
Described water reducer is at least two kinds a arbitrary combination in tripoly phosphate sodium STPP, naphthalenesulfonate formaldehyde condensation compound, the polycarboxylate.Adopt the different compound uses of high efficiency water reducing agent, can improve the mould material flowability.
Mould material good fluidity of the present invention, can under hot conditions, construct, setting time is short, can fast demoulding, not explosion of high bake, compare with common mould material and ramming mass; Constructional method is simple; Can greatly reduce labor strength, improve Working environment, can be applied to 2500m
3And the medium and small blast furnace of following two iron mouths or single iron mouth, at Wuhan Iron and Steel Plant 2500m
3Two iron mouth blast furnace use has obtained very satisfied effect, tap drain the condition of not repairing next time the property iron influx reach 200,000 tons, have vast market prospect.
Embodiment
Embodiment 1:
Raw material is formed (parts by weight): electric smelting low-carbon (LC) palm fibre corundum 60, silit 30, wedding agent 3, super-fine powder 7, inhibitor 0.2, detonation suppressor 1.55, water reducer 0.25.
Wherein, electric smelting low-carbon (LC) palm fibre corundum grain size groups become (mass percent): 8mm>=C＞5mm account for 40% matter, 5mm>=D＞3mm account for 20%, E≤3mm account for 40%; The silit grain size groups become (mass percent): 1mm>=F＞0.074mm account for 50%, 0.074mm>=G＞0.045mm account for 40%, H≤0.045mm account for 10%; Super-fine powder is Al
2O
3Micro mist, SiO
2The mixture of micro mist, silicon carbide micro-powder, its weight ratio are 3: 2: 1; Metal Si powder and B in the inhibitor
4The mass ratio of C micro mist is 10: 1; Metal A l powder, explosion-proof fibre weight ratio are 3: 1 in the detonation suppressor, and wherein the Al powder consists of (weight percentage), and particle diameter A accounts for 35%, and particle diameter B accounts for 65%, particle diameter 74 μ＜A≤300 μ wherein, and particle diameter B≤74 μ, the particle diameter ratio of A and B are 1: 2; Water reducer is tripoly phosphate sodium STPP and naphthalenesulfonate formaldehyde condensation compound, and the two mass ratio is 1: 2.Super-fine powder, inhibitor, detonation suppressor carry out pre-mixing earlier when mixing stirring, add other component then and mix, and every kind of raw material is uniformly dispersed, and prevent segregation.
Construction technology: send the above-mentioned mould material that mixes to forced stirrer, add the water of mould material weight 4.5%～5.5%, after stirring; Be cast in the tap drain, make its gravity flow moulding, need not vibration; In order to avoid mould material layering; Want continuously poured during cast, avoid interrupted pour, mould material produces the sclerosis layering greatly because of time difference before and after preventing; Behind the tap drain casting, ambient cure demoulding after 0.5～1 hour, mould material surfacing, flawless after the demoulding; After the tap drain demoulding, toast immediately, adopt the logical oxygen baking of blast furnace gas, flame temperature is 400 ℃, opens the big fire baking behind baking 0.5～1h, about 800 ℃ of temperature, and storing time 2～3h, tap drain need be added a cover insulation during baking, can come into operation after having toasted.
Embodiment 2:
Raw material is formed (parts by weight): electric smelting low-carbon (LC) palm fibre corundum 70, silit 20, wedding agent 2, super-fine powder 5, inhibitor 0.5, detonation suppressor 1, water reducer 0.2.
Wherein, electric smelting low-carbon (LC) palm fibre corundum grain size groups become (mass percent): 8mm>=C＞5mm account for 20% matter, 5mm>=D＞3mm account for 30%, E≤3mm account for 50%; The silit grain size groups become (mass percent): 1mm>=F＞0.074mm account for 60%, 0.074mm>=G＞0.045mm account for 20%, H≤0.045mm account for 20%; Super-fine powder is Al
2O
3Micro mist, SiO
2The mixture of micro mist, silicon carbide micro-powder, its weight ratio are 2: 1: 1; Metal Si powder and B in the inhibitor
4The mass ratio of C micro mist is 9: 1; Metal A l powder, explosion-proof fibre weight ratio are 2: 1 in the detonation suppressor, and wherein the Al powder consists of (weight percentage), and particle diameter A accounts for 20%, and particle diameter B accounts for 80%, particle diameter 74 μ＜A≤300 μ wherein, and particle diameter B≤74 μ, the particle diameter ratio of A and B are 1: 3; Water reducer is tripoly phosphate sodium STPP and naphthalenesulfonate formaldehyde condensation compound, and the two mass ratio is 1: 3.
Constructional method is with embodiment 1.
Embodiment 3:
Raw material is formed (parts by weight): electric smelting low-carbon (LC) palm fibre corundum 80, silit 15, wedding agent 1, super-fine powder 2, inhibitor 2.2, detonation suppressor 0.1, water reducer 0.1.
Wherein, electric smelting low-carbon (LC) palm fibre corundum grain size groups become (mass percent): 8mm>=C＞5mm account for 30% matter, 5mm>=D＞3mm account for 40%, E≤3mm account for 30%; The silit grain size groups become (mass percent): 1mm>=F＞0.074mm account for 40%, 0.074mm>=G＞0.045mm account for 30%, H≤0.045mm account for 30%; Super-fine powder is Al
2O
3Micro mist, SiO
2The mixture of micro mist, silicon carbide micro-powder, its weight ratio are 3: 2: 1; Metal Si powder and B in the inhibitor
4The ratio of C micro mist is 11: 1; Metal A l powder, explosion-proof fibre weight ratio are 4: 1 in the detonation suppressor, and wherein the Al powder consists of (weight percentage), and particle diameter A accounts for 30%, and particle diameter B accounts for 70%, particle diameter 74 μ＜A≤300 μ wherein, and particle diameter B≤74 μ, the particle diameter ratio of A and B are 1: 4; Water reducer is tripoly phosphate sodium STPP and naphthalenesulfonate formaldehyde condensation compound, and the two mixing quality ratio is 1: 4.
Constructional method is with embodiment 1.
The material property detection method:
Mould material is processed the band sample of 40 * 40 * 160mm, measure line velocity of variation, apparent porosity and volume density, cold crushing strength and the strength at normal temperature of sample respectively according to GB4758.3-84, GB2997-82, GB5072-85, GB3001-82.
Testing method is split in the sample antiknock: will pour into a mould good sample in maintenance demoulding after 2 hours under 40 ℃ the temperature, and put into temperature immediately and be in 400 ℃ the electric furnace, and observe whether explosion of sample; If the sample explosion, then this temperature is the sample antiknock and splits temperature limitation, like not explosion; Then promote starting temperature; And the like, till the sample explosion, i.e. temperature is split in the antiknock of detectable sample.
Physical and chemical index
Claims (10)
1. a tap drain explosion-proof mould material of flowing automatically; It is characterized in that, form: electric smelting low-carbon (LC) palm fibre corundum 60～80, silit 15～30, wedding agent 1～3, super-fine powder 2～7, inhibitor 0.2～2.2, detonation suppressor 0.1～1.55, water reducer 0.1～0.25 by following materials based on weight.
2. the tap drain as claimed in claim 1 explosion-proof mould material of flowing automatically is characterized in that described detonation suppressor is the mixture of metal A l powder and explosion-proof fiber.
3. the tap drain as claimed in claim 2 explosion-proof mould material of flowing automatically is characterized in that said metal A l powder with the mixed weight ratio of explosion-proof fiber is: 2～4: 1.
4. like claim 2 or the 3 described tap drains explosion-proof mould material of flowing automatically, it is characterized in that particle diameter A accounts for 20～35% weight percentage in the said metal A l powder, particle diameter B accounts for 65～80% weight percentage, particle diameter 74 μ＜A≤300 μ wherein, particle diameter B≤74 μ.
5. the tap drain as claimed in claim 1 explosion-proof mould material of flowing automatically is characterized in that said super-fine powder is Al
2O
3Micro mist, SiO
2The mixture of micro mist and silicon carbide micro-powder, its weight ratio are 3～2: 2～1: 1.
6. the tap drain as claimed in claim 1 explosion-proof mould material of flowing automatically is characterized in that, said electric smelting low-carbon (LC) palm fibre corundum is by C, D, three kinds of size compositions of E, and wherein: 8mm>=C＞5mm accounts for 20～40%; 5mm>=D＞3mm accounts for 20～40% mass percents; E≤3mm accounts for 20～50% weight percentage.
7. the tap drain as claimed in claim 1 explosion-proof mould material of flowing automatically; It is characterized in that said silit is by 10～30% weight percentage that account for that account for 20～40% weight percentage, H≤0.045mm that account for 40～60% weight percentage, 0.074mm>=G＞0.045mm of F, G, three kinds of size composition: 1mm>=F＞0.074mm of H.
8. the tap drain as claimed in claim 1 explosion-proof mould material of flowing automatically is characterized in that said wedding agent is a pure calcium aluminate cement.
9. the tap drain as claimed in claim 1 explosion-proof mould material of flowing automatically is characterized in that described inhibitor is metal Si powder and B
4The mixture of C micro mist, the two weight ratio are 9～11: 1.
10. like the flow automatically constructional method of explosion-proof mould material of each tap drain of claim 1～9: comprise the steps:
1) each mould material of claim 1～9 is added in forced mixer stirs, and the water that adds mould material weight 5～5.5% stirs, then with its continuously poured in main iron hook bottom of trench and ditch lining, the gravity flow moulding need not vibration;
2) behind the tap drain casting, ambient cure demoulding after 0.5～1 hour.Mould material surfacing, flawless after the demoulding;
3) promptly toasted 0.5 hour after the mould material demoulding, carry out the big fire baking with 800 ℃ temperature again and can come into operation after 2～3 hours with 400 ℃ temperature.
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| CN 201110391377 CN102491765B (en) | 2011-11-30 | 2011-11-30 | Main ditch self-flowing anti-blowout pour material of main channel and construction method thereof |
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| CN102491765B CN102491765B (en) | 2013-06-05 |
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Cited By (9)
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|---|---|---|---|---|
| CN103073316A (en) * | 2013-02-25 | 2013-05-01 | 孙志红 | Gunning mix for main iron runner of blast furnace and preparation method thereof |
| CN103159490A (en) * | 2013-04-11 | 2013-06-19 | 孙志红 | Swinging chute working lining castable of composite material and preparation method of castable |
| CN105218132A (en) * | 2015-11-19 | 2016-01-06 | 长兴兴鹰新型耐火建材有限公司 | A kind of triple air hose of cement kiln Special wear-resistant mould material |
| CN105272318A (en) * | 2015-11-19 | 2016-01-27 | 长兴兴鹰新型耐火建材有限公司 | High-strength wear-resistant anti-erosion pouring material |
| CN105732057A (en) * | 2016-01-29 | 2016-07-06 | 巩义市宏宇耐火材料有限公司 | Silica sol combined corundum castable and preparation method thereof |
| CN107879733A (en) * | 2017-12-22 | 2018-04-06 | 河南欣昌耐材股份有限公司 | A kind of blast furnace iron outlet groove quick-drying gravity flow pouring material |
| CN108046814A (en) * | 2017-12-22 | 2018-05-18 | 河南欣昌耐材股份有限公司 | The blast furnace iron outlet groove quick-drying gravity flow pouring material prepared using discarded castable reworked material |
| CN111675545A (en) * | 2020-06-10 | 2020-09-18 | 天津炜润达新材料科技有限公司 | Blast furnace tapping channel castable |
| CN115536397A (en) * | 2022-10-30 | 2022-12-30 | 中钢集团洛阳耐火材料研究院有限公司 | Self-repairing silicon carbide refractory material for carbon-buried atmosphere |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103073316A (en) * | 2013-02-25 | 2013-05-01 | 孙志红 | Gunning mix for main iron runner of blast furnace and preparation method thereof |
| CN103073316B (en) * | 2013-02-25 | 2014-09-24 | 孙志红 | Gunning mix for main iron runner of blast furnace and preparation method thereof |
| CN103159490A (en) * | 2013-04-11 | 2013-06-19 | 孙志红 | Swinging chute working lining castable of composite material and preparation method of castable |
| CN103159490B (en) * | 2013-04-11 | 2014-08-13 | 孙志红 | Swinging chute working lining castable of composite material and preparation method of castable |
| CN105218132A (en) * | 2015-11-19 | 2016-01-06 | 长兴兴鹰新型耐火建材有限公司 | A kind of triple air hose of cement kiln Special wear-resistant mould material |
| CN105272318A (en) * | 2015-11-19 | 2016-01-27 | 长兴兴鹰新型耐火建材有限公司 | High-strength wear-resistant anti-erosion pouring material |
| CN105732057A (en) * | 2016-01-29 | 2016-07-06 | 巩义市宏宇耐火材料有限公司 | Silica sol combined corundum castable and preparation method thereof |
| CN107879733A (en) * | 2017-12-22 | 2018-04-06 | 河南欣昌耐材股份有限公司 | A kind of blast furnace iron outlet groove quick-drying gravity flow pouring material |
| CN108046814A (en) * | 2017-12-22 | 2018-05-18 | 河南欣昌耐材股份有限公司 | The blast furnace iron outlet groove quick-drying gravity flow pouring material prepared using discarded castable reworked material |
| CN111675545A (en) * | 2020-06-10 | 2020-09-18 | 天津炜润达新材料科技有限公司 | Blast furnace tapping channel castable |
| CN115536397A (en) * | 2022-10-30 | 2022-12-30 | 中钢集团洛阳耐火材料研究院有限公司 | Self-repairing silicon carbide refractory material for carbon-buried atmosphere |
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Application publication date: 20120613 Assignee: WUHAN IRON & STEEL (GROUP) CORP. Assignor: Wuhan Iron & Steel (Group) Corp. Contract record no.: 2014420000057 Denomination of invention: Main ditch self-flowing anti-blowout pour material of main channel and construction method thereof Granted publication date: 20130605 License type: Exclusive License Record date: 20140505 |
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Effective date of registration: 20180323 Address after: No. 1, Qingshan District, Hubei Province, Wuhan City, Hubei Patentee after: Wuhan Iron & Steel (Group) Corp. Address before: 430080 Wuchang, Hubei Friendship Road, No. A, block, floor 999, 15 Patentee before: Wuhan Iron & Steel (Group) Corp. |