CN101830719B - Explosion-proof iron runner castable - Google Patents
Explosion-proof iron runner castable Download PDFInfo
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- CN101830719B CN101830719B CN2010101857377A CN201010185737A CN101830719B CN 101830719 B CN101830719 B CN 101830719B CN 2010101857377 A CN2010101857377 A CN 2010101857377A CN 201010185737 A CN201010185737 A CN 201010185737A CN 101830719 B CN101830719 B CN 101830719B
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Abstract
The invention relates to an explosion-proof iron runner castable which comprises the following raw materials in percentage by weight: 55-80 percent of fusion tabular corundum, 10-30 percent of silicon carbide, 1-5 percent of soft clay, 2-5 percent of pure calcium aluminate cement, 1-7 percent of submicron powder, 0.5-1.5 percent of explosion-proof agent and 0.05-0.15 percent of water reducing agent, wherein the explosion-proof agent is a mixture of aluminum powder, aluminum lactate, explosion-proof fiber and boron carbide powder with the weight ratio of 1-2:2.5-4:1-2.5:2-4. The castable of the invention has no cracks after demoulding and drying and no spalling during baking, has the safe explosion-proof temperature of 800 DEG C increased from 500 DEG C, can be subjected to construction under heat state and rapid temperature rise without spalling and can meet the operating requirements of rapid construction of middle and small size blast furnace iron runner. The castable has long service life, can improve the environment of a casting house, greatly reduces the labor intensity of the workers, improves the quality of molten iron and enhances the application safety factor of the iron runner.
Description
Technical field
The present invention relates to fire resisting material field, relate in particular to a kind of explosion-proof iron runner castable.
Background technology
In recent years; Some variations have taken place in blast furnace in production practice; Adopt fine fodder, heat size expansion, molten iron temperature raising, top pressure to improve the cycle of tapping a blast furnace is accelerated, the amount of tapping a blast furnace and the quantity of slag increase, the time lengthening of tapping a blast furnace; The molten iron flow velocity increases, and makes the working conditions of ditch lining material become harsh more.According to statistics, in molten iron refractory materials unit consumption, casting house (iron runner material and stemming) accounts for 71%.Casting house between blast furnace generation campaign is built and maintenance cost, and the summation of stemming price, repaiies also height of a blast furnace and auxiliary facility thereof cost than newly.For this reason, countries in the world to casting house with the structure design of refractory materials material and performance thereof, ditch, build lining process etc. and carried out extensive and deep research.
Domestic large blast furnace adopts Al more
2O
3-SiC-C matter is hanged down cement deposit material, and its good fluidity, refractoriness are high, and pour mass compactness is good, intensity is high, so iron runner anti-erosion, antiscour, long service life (iron influx is high).But the greatest problem of this material be need after the cast maintenance and can not excess speed baking, otherwise the low and explosion of intensity can appear.And the medium and small blast furnace of single iron notch, its iron runner needs to repair fast, and the engineering time can not be greater than the pitch time of tapping a blast furnace at every turn.Since the requirement of this intimate harshness, above-mentioned common Al
2O
3The low cement deposit material of-SiC-C matter is difficult to be applicable to the blast furnace of the type.So most single iron notch blast furnaces all exempt to toast the iron runner ramming mass in use.This material can satisfy the not requirement of needs bakings or quick baking of blast furnace casting; But its volume density is less than normal; Compressive strength is on the low side, and corrosion resistance is relatively poor, and erosion resistibility is poorer; And maintenance is frequent, labour intensity big (frequent repairing not only labour intensity is big, has also increased a lot of danger), not meet environmental requirement shortcomings such as (pitch, resin will emit tobacco) also be conspicuous.Large-scale iron runner castable can make the iron runner prolongs life, but can not satisfy construction requirement.Can satisfy construction requirement though exempt to toast the iron runner ramming mass, but can't make iron runner reach the long life-span.So; Develop and under hot, construct, to be rapidly heated and unburstable cement combination mould material and quick repair technology; Satisfy the rapid construction of medium and small blast furnace iron runner, the demand that increases the service life; And satisfy environmental protection requirement (not containing organically objectionable impurities such as tar, pitch, resin), just become the current key subjects of demanding urgently researching and solving.Therefore, effectively solve the large blast furnace iron runner castable fast demoulding and quick baking, prevent the explosion problem, be the key that can this material be used for single iron mouth blast furnace.
Summary of the invention
The technical problem that the present invention will solve provides a kind of the construction at hot time and also can be rapidly heated and not explosion, satisfies the explosion-proof iron runner castable of the rapid construction request for utilization of medium and small single iron mouth blast furnace iron runner.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is:
A kind of explosion-proof iron runner castable, said mould material contains following material composition:
Raw material granularity distributed weight per-cent
Electric smelting plate diamond spar 1～15mm 55～80%
Silit≤0.088mm 10～30%
Soft clay≤0.088mm 1～5%
Pure calcium aluminate cement≤0.044mm 2～5%
Super-fine powder≤0.044mm 1～7%
Detonation suppressor 0.5～1.5%
Water reducer 0.05～0.15%
Said detonation suppressor is aluminium powder, Aluctyl, explosion-proof fiber, boron carbide powder by weight being 1～2: 2.5～4: 1～2.5: 2～4 mixture.Norbide is used for carbon containing refractory and plays antioxygenation, can make the product densification, stops the oxidation of carbon in the carbon containing refractory, simultaneously in 1000 ℃～1250 ℃, and Al
2O
3With B
2O
3React, generate 9Al
2O
32B
2O
3Styloid, be distributed in the matrix and gap of refractory materials, thereby reduce void content, improve medium temperature intensity, and the 9Al that generates
2O
32B
2O
3The crystal volumetric expansion, the volumetric shrinkage that can heal reduces crackle, prolongs the work-ing life of refractory materials.
Said Aluctyl is an alkali formula Aluctyl.When cryodrying, the dehydration gel of alkali formula emulsion produces netted tiny crack and has increased air penetrability in matrix, adds in addition to suppress behind the alkali formula emulsion or delayed CAH
10O
5Generation, the hydrate of having controlled cement mutually with the form of having controlled the mould material microtexture, the result of these compound actions has reached the effect that improves anti-explosion temperature; Can the safety anti-explosive temperature of mould material be brought up to 800 ℃ from 500 ℃, make mould material that safer working conditions arranged.
Said explosion-proof fiber is vinylon, nylon, gather at least a in second resin, polyester, Vilaterm, the polypropylene fibre, and its diameter is 4～6 μ, and length is 3～6mm.
Said super-fine powder is active A l
2O
3Super-fine powder, SiO
2Super-fine powder is by weight 3～5: 2 mixture.
Said water reducer is at least a in tripoly phosphate sodium STPP, Sodium hexametaphosphate 99, paracyanogen amine condenses, the sulfonate and formaldehyde condenses.
Said explosion-proof iron runner castable adds casting and constructing behind the water by 5～5.5% of total raw material weight.
The present invention has actively useful effect:
1. flawless after the stripping drying; Do not have during baking that admixture has detonation suppressor (metallic aluminium powder, Aluctyl and organic fibre etc.) in the explosion phenomenon mould material of the present invention; In baking and heat-processed, can make the unimpeded eliminating of water vapour ability, prevent by the water vapour expansion and cause to serve as a contrast peeling off or bursting of body.
2. the safety anti-explosive temperature of mould material is brought up to 800 ℃ from 500 ℃, makes mould material that safer working conditions arranged; What effectively solved big blast furnace iron runner mould material fast does the demoulding and quick baking, prevents the explosion problem, makes it to be applied to medium and small blast furnace that Dan Tiekou taps a blast furnace and carries out integrated pouredly, can obtain the effect of being satisfied with very much.Can and can be rapidly heated and not explosion in hot construction down like this mould material, can satisfy the rapid construction request for utilization of medium and small single iron mouth blast furnace iron runner.
3. the long service life of the explosion-proof mould material of the present invention can be improved the environment of casting house, reduces labor strength significantly, improves molten steel quality, strengthens iron runner coefficient safe in utilization.
4. the main performance index of the explosion-proof mould material of the present invention is seen table 1.
Table 1 explosion-proof iron runner cookingization index
Embodiment
1 one kinds of explosion-proof iron runner castables of embodiment, by weight percentage, raw material is formed and to be seen table 2, and wherein detonation suppressor is aluminium powder, alkali formula Aluctyl, explosion-proof fiber, boron carbide powder by weight being 1.5: 3: 2: 3 mixture; Explosion-proof fiber is a polypropylene fibre, and its diameter is 4～6 μ, and length is 3～5mm; Super-fine powder is active A l
2O
3Super-fine powder, SiO
2Super-fine powder was by weight 4: 2 mixture; Water reducer is paracyanogen amine condenses, 1: 1 mixture of sulfonate and formaldehyde condenses.
Preparation technology's flow process of above-mentioned cast is: raw material pick up choosing-by the prescription weighing-mixing stirring-blowing pack-warehouse-in, add water by 5～5.5% of total cast raw material weight during use.When blowing stirs, join in the stirrer with equal material, and strictness adds entry by standard, the too small construction quality and the functional quality that all can influence mould material of hypervolia at every turn.
The cast of large blast furnace iron runner castable is the important step of construction, so must be undertaken by working specification.After mould material is poured in the ditch, adopt immersion vibrator with the triangle method for oscillating of fixing a point, every distance between two points is 0.2～0.3m; Each some time of vibration can not be oversize, to vibrate bleeding for (at casting process, the thin mud of one deck appears in mould material well; This moment, mould material reached maximum fine and close, and too short like the time, then pouring density is not enough; Time is oversize, and size segregation can take place).Cast must be carried out continuously, accomplishs without any letup, if the two-layer cast in front and back is oversize pitch time, because of the former existing certain sclerosis, can produce tangible layering when pouring into a mould once more; After pouring, the surface can not troweling, and intravital gas can't be discharged because surperficial troweling can make pouring layer.
The iron runner house of correction takes time: do not comprise that iron runner is disassembled and clearance time, whole iron runner house of correction takes time and is 48h, comprise lay bricks, the about 24h of construction, the demouldings such as formwork, cast toast about 24h.
Baking requires: after the iron runner demoulding, can toast immediately; Use firewood or coal gas to toast, can on iron runner, add a cover insulation during baking.The baking system: little fire-moderate heat-big fire, little fiery storing time 10～12 hours heats up then and carries out moderate heat baking 8～10 hours, big fire baking 6～8 hours; Toasting total time spent is no more than 48h.
2 one kinds of explosion-proof iron runner castables of embodiment, by weight percentage, raw material is formed and to be seen table 2, and wherein detonation suppressor is aluminium powder, Aluctyl, explosion-proof fiber, boron carbide powder by weight being 1: 2.5: 1: 2 mixture; Explosion-proof fiber is the mixture of Vilaterm, polypropylene fibre, and its diameter is 4～6 μ, and length is 3～6mm; Super-fine powder is active A l
2O
3Super-fine powder, SiO
2Super-fine powder was by weight 3: 2 mixture; Water reducer be among ADS, the ADW arbitrarily than mixture.Other is with embodiment 1.
3 one kinds of explosion-proof iron runner castables of embodiment, by weight percentage, raw material is formed and to be seen table 2, and wherein detonation suppressor is aluminium powder, Aluctyl, explosion-proof fiber, boron carbide powder by weight being 2: 4: 2.5: 4 mixture; Explosion-proof fiber is a polypropylene fibre, and its diameter is 4～6 μ, and length is 3～6mm; Super-fine powder is active A l
2O
3Super-fine powder, SiO
2Super-fine powder was by weight 5: 2 mixture; Water reducer is the mixture of paracyanogen amine condenses, sulfonate and formaldehyde condenses.Other is with embodiment 1.
4 one kinds of explosion-proof iron runner castables of embodiment, by weight percentage, raw material is formed and to be seen table 2, and wherein detonation suppressor is aluminium powder, Aluctyl, explosion-proof fiber, boron carbide powder by weight being 1: 4: 1: 4 mixture; Explosion-proof fiber is a polyester; Super-fine powder is active A l
2O
3Super-fine powder, SiO
2Super-fine powder was by weight 3.5: 2 mixture; Water reducer is paracyanogen amine condenses, sulfonate and formaldehyde condenses mixture.Other is with embodiment 1.
5 one kinds of explosion-proof iron runner castables of embodiment, by weight percentage, raw material is formed and to be seen table 2, and wherein detonation suppressor is aluminium powder, Aluctyl, explosion-proof fiber, boron carbide powder by weight being 2: 2.5: 2.5: 4 mixture; Explosion-proof fiber is a polypropylene fibre; Super-fine powder is active A l
2O
3Super-fine powder, SiO
2Super-fine powder was by weight 4.5: 2 mixture; Water reducer is a paracyanogen amine condenses.Other is with embodiment 1.
6 one kinds of explosion-proof iron runner castables of embodiment, by weight percentage, raw material is formed and to be seen table 3, and wherein detonation suppressor is aluminium powder, Aluctyl, explosion-proof fiber, boron carbide powder by weight being 1.5: 3.7: 1.8: 3 mixture; Explosion-proof fiber is Vilaterm, polypropylene fibre mixture; Super-fine powder is active A l
2O
3Super-fine powder, SiO
2Super-fine powder was by weight 3.5: 2 mixture; Water reducer is any one among ADS, the ADW.Other is with embodiment 1.
7 one kinds of explosion-proof iron runner castables of embodiment, by weight percentage, raw material is formed and to be seen table 3, and wherein detonation suppressor is aluminium powder, Aluctyl, explosion-proof fiber, boron carbide powder by weight being 1.8: 3.5: 2: 2.5 mixture; Explosion-proof fiber is a polypropylene fibre, and its diameter is 4～6 μ, and length is 3～6mm; Super-fine powder is active A l
2O
3Super-fine powder, SiO
2Super-fine powder was by weight 3.8: 2 mixture; Water reducer is the sulfonate and formaldehyde condenses.Other is with embodiment 1.
8 one kinds of explosion-proof iron runner castables of embodiment, by weight percentage, raw material is formed and to be seen table 3, and wherein detonation suppressor is aluminium powder, Aluctyl, explosion-proof fiber, boron carbide powder by weight being 1.2: 2.8: 2.2: 3.8 mixture; Explosion-proof fiber is for gathering second resin, polypropylene fibre mixture; Super-fine powder is active A l
2O
3Super-fine powder, SiO
2Super-fine powder was by weight 3.2: 2 mixture; Water reducer is sulfonated melamine compound resin (SM).Other is with embodiment 1.
9 one kinds of explosion-proof iron runner castables of embodiment, by weight percentage, raw material is formed and to be seen table 3, and wherein detonation suppressor is aluminium powder, Aluctyl, explosion-proof fiber, boron carbide powder by weight being 1.6: 3.6: 1.8: 2.2 mixture; Explosion-proof fiber is vinylon, gather second resin, polypropylene fibre equal proportion mixture; Water reducer is tripoly phosphate sodium STPP, Sodium hexametaphosphate 99, paracyanogen amine condenses equal proportion mixture.Other is with embodiment 1.
10 1 kinds of explosion-proof iron runner castables of embodiment, by weight percentage, raw material is formed and to be seen table 3, and wherein detonation suppressor is aluminium powder, Aluctyl, explosion-proof fiber, boron carbide powder by weight being 2: 3: 1.9: 3 mixture; Explosion-proof fiber is a polypropylene fibre; Super-fine powder is active A l
2O
3Super-fine powder, SiO
2Super-fine powder was by weight 4.3: 2 mixture; Water reducer is ADS, ADW mixture.Other is with embodiment 1.
Table 2 is implemented 1～5 raw material formation
Table 3 is implemented 5～10 raw material formation
Claims (3)
1. an explosion-proof iron runner castable is characterized in that, said mould material contains following material composition:
Said detonation suppressor is aluminium powder, alkali formula Aluctyl, explosion-proof fiber, boron carbide powder by weight being 1～2: 2.5～4: 1～2.5: 2～4 mixture; Said explosion-proof fiber is at least a in vinylon, nylon, polyester, Vilaterm, the polypropylene fibre; Its diameter is 4～6 μ m, and length is 3～6mm; Said super-fine powder is active A l
2O
3Super-fine powder, SiO
2Super-fine powder is by weight 3～5: 2 mixture.
2. explosion-proof iron runner castable according to claim 1 is characterized in that, said water reducer is at least a among tripoly phosphate sodium STPP, Sodium hexametaphosphate 99, paracyanogen amine condenses, sulfonate and formaldehyde condenses, ADS, the ADW.
3. explosion-proof iron runner castable according to claim 1 is characterized in that, said explosion-proof iron runner castable adds casting and constructing behind the water by 5～5.5% of total raw material weight.
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| CN2010101857377A CN101830719B (en) | 2010-05-28 | 2010-05-28 | Explosion-proof iron runner castable |
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|---|---|---|---|
| CN2010101857377A CN101830719B (en) | 2010-05-28 | 2010-05-28 | Explosion-proof iron runner castable |
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| CN101830719B true CN101830719B (en) | 2012-09-26 |
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