CN105218111A - Anhydrous stemming - Google Patents
Anhydrous stemming Download PDFInfo
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- CN105218111A CN105218111A CN201510600489.0A CN201510600489A CN105218111A CN 105218111 A CN105218111 A CN 105218111A CN 201510600489 A CN201510600489 A CN 201510600489A CN 105218111 A CN105218111 A CN 105218111A
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Abstract
The present invention relates to a kind of anhydrous stemming, be made up of refractory mixture and combined binder, and based on the gross weight of described refractory mixture, described refractory mixture composed as follows: the alumina of 10 ~ 45%; The silicon carbide of 8 ~ 20%; The coke of 0 ~ 30%; The clay of 0 ~ 20%; The modified pitch of 0 ~ 8%; The kyanite of 4 ~ 6%; 2 ~ 6% sericites; The metallic silicon power of 1 ~ 3%.Described combined binder is (9 ~ 9.5) by weight ratio: tar and the grease of (0.5 ~ 1) form.The mass ratio of described refractory mixture and described combined binder is 100: (13 ~ 20).Anhydrous stemming of the present invention has good plasticity-, easy opening, and materials consumption is low.
Description
Technical field
The present invention relates to a kind of blast furnace stifled iron notch anhydrous stemming
, belong to fire resisting material field.
Background technology
Due to maximization, the long service life of modern blast furnace, the increase of tapping duration growth and slag flowing molten iron amount, has higher requirement to the stable of blast furnace iron notch working order and maintenance.Maintain smooth operation of furnace high yield, guarantee that the key of stable operation is the degree of depth of iron notch, and the performance of stemming is the key ensureing iron notch steady operation.
Stemming quality is very large to the intensity effect of mud drum, particularly in recent years blast furnace after strengthening smelting, less than 1000 cubic metres blast furnace day the number of casts reach more than 18 times.Therefore, iron port gun mud is required there are enough refractoriness, suitable void content, and stronger iron-resistant water washes away, erosional competency, will have good ventilation property simultaneously, be easy to dry and do not ftracture, sintering character is good, and intensity is high, and opening performance is good, environmental pollution is little, also will have suitable plasticity-etc.
In prior art, blast furnace mud mainly contains two classes: a class is hydrous taphole loam, and another kind of is anhydrous stemming.Hydrous taphole loam is that intensity is lower with coke powder, clay, grog, pitch etc. for principal ingredients, and the ability that anti-slag, iron liquid corrode and washes away is poor.Anhydrous stemming is for principal ingredients with corundum, silicon carbide, coke powder, clay, bonding agent etc., although intensity increases to some extent, the ability that anti-slag, iron liquid corrode and washes away strengthens to some extent, but also there is the deficiencies such as opening difficulty, the easily disconnected iron mouth of appearance in actual use.
Summary of the invention
For above-mentioned the deficiencies in the prior art part, the invention provides and a kind ofly have good plasticity-, what meet dissimilar blast furnace taphole beats the mud degree of depth, easy opening and do not occur the anhydrous stemming of disconnected iron mouth.
In order to solve the problems of the technologies described above, the invention provides a kind of anhydrous stemming, be made up of refractory mixture and combined binder.Wherein, described refractory mixture is composed as follows:
The alumina of 10 ~ 45%, such as alumina content is the alumine of more than 85%;
The silicon carbide of 8 ~ 20%, such as purity is the silicon carbide of more than 80%;
The coke of 0 ~ 30%;
The clay of 0 ~ 20%;
The modified pitch of 0 ~ 8%;
The kyanite of 4 ~ 6%;
The sericite of 2 ~ 6%;
The metallic silicon power of 1 ~ 3%;
Described combined binder is (9 ~ 9.5) by weight ratio: tar and the grease of (0.5 ~ 1) form; And
The mass ratio of described refractory mixture and described combined binder is 100: (13 ~ 20).
Described refractory mixture is made up of particulate fraction and powder part.Wherein, described particulate fraction comprises coke granule, alumina particle and silicon-carbide particle, and described powder part comprises alumina powder, sic powder, clay powder, kyanite powder, metallic silicon power, sericite in powder and modified pitch powder.
Particularly, the particle diameter of described alumina particle is 0 ~ 3mm, the particle diameter of described silicon-carbide particle is 0 ~ 3mm, the particle diameter of described coke grain is 0 ~ 4mm, the particle diameter of described alumina powder, sic powder is 180 orders, the particle diameter of described sericite in powder, clay powder is 200 orders, and the particle diameter of modified pitch powder, kyanite powder is 120 orders, and the particle diameter of metallic silicon power is 325 orders.
Decompose at the temperature of described grease more than 500 DEG C.
The softening temperature of described modified pitch is 105 ~ 115 DEG C.
Anhydrous stemming for blast furnace of the present invention can ensure the iron mouth degree of depth; Be easy to opening, molten iron seepage and reopening rate when can reduce opening, and without leakage slag and disconnected iron lip reflex during opening; Antiscour and corrosion resistance are well, moderate.
Embodiment
The invention provides a kind of anhydrous stemming, be made up of refractory mixture and combined binder.Wherein, described refractory mixture is composed as follows:
10 ~ 45%, preferably 15 ~ 40%, further more preferably 20 ~ 35% alumina, such as alumina content is the alumine of more than 85%;
8 ~ 20%, preferably 10 ~ 17%, the more preferably silicon carbide of 10 ~ 15%, the purity of such as 18% is the silicon carbide of more than 80%;
0 ~ 30%, preferably 5 ~ 25%, the more preferably coke of 10 ~ 20%;
0 ~ 20%, preferably 5 ~ 17%, the more preferably clay of 10 ~ 15%;
0 ~ 8%, the preferably modified pitch of 2 ~ 6%;
The kyanite of 4 ~ 6%;
The sericite of 2 ~ 6%;
The metallic silicon power of 1 ~ 3%;
Above-mentioned combined binder is (9 ~ 9.5) by weight ratio: (0.5 ~ 1), preferably 9: 1 tar and grease form; And the mass ratio of above-mentioned refractory mixture and combined binder is 100: (13 ~ 20).
The particle diameter of above-mentioned alumina particle is 0 ~ 3mm, the particle diameter of silicon-carbide particle is 0 ~ 3mm, the particle diameter of coke grain is 0 ~ 4mm, the particle diameter of alumina powder, sic powder is 180 orders, the particle diameter of sericite in powder, clay powder is 200 orders, the particle diameter of modified pitch powder, kyanite powder is 120 orders, and the particle diameter of metallic silicon power is 325 orders.
Can decompose at the temperature of described grease more than 500 DEG C.Be applicable to grease example of the present invention and can comprise vegetables oil, animal grease, wherein, vegetables oil can be soybean oil especially.Above-mentioned grease also can be sewer oil.
According to an embodiment, the refractory mixture of anhydrous stemming of the present invention is made up of the component of following weight percents:
Based on the refractory mixture of 100 weight parts, combined binder is 16.5 weight parts; And combined binder is made up of tar and sewer oil or soybean oil, the part by weight of tar and sewer oil or soybean oil is 9: 1.
In order to strengthen the intensity of stemming, above-mentioned refractory mixture is made up of particulate fraction and powder part usually.Wherein, particulate fraction comprises coke granule, alumina particle, silicon-carbide particle, and powder part comprises alumina powder, sic powder, clay powder, kyanite powder, metallic silicon power, sericite in powder, modified pitch powder.In refractory mixture, the relative proportion of particulate fraction and powder part can require to regulate according to the actual strength of anhydrous stemming, such as its weight ratio can be (3 ~ 7): (7 ~ 3), such as can be (4 ~ 6): (6 ~ 4), preferably 5: 5.
The softening temperature of above-mentioned modified pitch is 105 ~ 115 DEG C, preferably 110 DEG C.
In anhydrous stemming of the present invention, owing to adding metallic silicon power, silicon carbide (comprising silicon-carbide particle and carborundum powder) and combined binder, at high temperature decompose generation gas by combined binder, cause the aggregate structure of stemming to loosen, thus be conducive to opening and carry out smoothly.Meanwhile, metallic silicon power retains the carbon that combined binder carbonization produces, and forms silicon carbide, thus for combining with material carbon SiClx the erosion resistibility strengthening anhydrous stemming.If the content of metallic silicon power in refractory mixture is lower than 1%, fully can not retains the carbon that combined binder carbonization produces, thus enough intensity can not be provided.If the content of metallic silicon power in refractory mixture is higher than 3%, then high cost.Meanwhile, when only having the relative content of three kinds of components all in scope mentioned above, the balance between intensity, erosion resistibility and suitable opening performance that guarantee is enough.
Above-mentioned anhydrous stemming for blast furnace can be prepared by this area ordinary method, such as press coke grain, alumina particle, silicon-carbide particle, and alumine powder, carborundum powder, clay powder, kyanite powder, metallic silicon power, sericite in powder, modified pitch powder order add particulate fraction and powder part, and fully stir and obtain refractory mixture.Burnt oil and grease is mixed, such as, mixes at 60 DEG C, and mixed combined binder is joined in the refractory mixture be placed in pug mill, fully stir.The mixture obtained thus grinds even in pug mill, uses mud extruder extrusion moulding after discharging.
Above-mentioned anhydrous stemming for blast furnace can be used on dissimilar blast furnace taphole, such as big-and-middle-sized blast furnace, particularly 2500m
3blast furnace.As follows according to the using property data of anhydrous stemming of the present invention: when 60 DEG C, the horse summer value of stemming is 0.455 ~ 0.655MPa, the requirement that iron mouth is beaten the mud degree of depth, on time tapping outlet and gone out clean slag iron can be met, there is good anti-slag iron erosion performance, tapping duration (80 ~ 150min) normal table; Iron mouth degree of depth qualification rate is 98.0 ~ 98.5%, and reopening rate is 0.12 ~ 0.22%, and boring motionless rate is 0%, tapping duration qualification rate 98.8 ~ 99.8%; The materials consumption during tapping outlet of stokehold: drill bit 0.015 ~ 0.02/stove, jumper bar 1/stove, O
2pipe 0/stove.
Embodiment
In following examples, raw materials specification is as follows:
Alumina particle: alumina content is 85%, particle diameter 0 ~ 3mm;
Silicon-carbide particle: purity 80%, particle diameter 0 ~ 3mm;
Coke grain: particle diameter 0 ~ 4mm;
Alumina powder: alumina content is 85%, particle diameter 180 order;
Clay powder: particle diameter 200 order;
Sic powder: purity 80%, particle diameter 180 order;
Modified pitch powder: softening temperature 110 DEG C, particle diameter 120 order;
Kyanite powder: particle diameter 120 order;
Sericite powder: particle diameter 200 order;
Pure Silicon Metal powder: particle diameter 325 order;
Tar: standard coal tar;
Grease: soybean oil;
Sewer oil.
Embodiment 1
The preparation of anhydrous stemming
2), 20% coke, 15% silicon carbide (particle: powder=5: 5), 15% clay, 4% modified pitch, 5% kyanite, 2% metallic silicon power, 4% sericite the refractory mixture of anhydrous stemming is made up of each raw material of following weight percents: 35% alumina (particle: powder=8:.Based on the gross weight of refractory mixture, add the combined binder of 16%.This combined binder is made up of tar and sewer oil, and the weight ratio of tar and sewer oil is 9: 1.
When making this anhydrous stemming, add by coke grain, alumina particle, silicon-carbide particle, alumina powder, sic powder, clay powder, kyanite powder, metallic silicon power, sericite in powder, modified pitch powder order, fully stir and obtain refractory mixture.Tar and sewer oil are mixed to form combined binder at 60 DEG C.Combined binder is joined the refractory mixture be placed in pug mill, after rolling uniform discharge, use mud extruder extrusion moulding, thus obtained anhydrous stemming.
The application of anhydrous stemming and Performance Detection
This anhydrous stemming is applied in 2500m
3on blast furnace taphole, using 120 stoves, all detecting often refining a stove.
The using property data changing conditions of stemming is as follows: the horse summer value of stemming 60 DEG C is 0.455 ~ 0.555MPa, iron mouth can be met beat mud degree of depth 2.9m, on time tapping outlet and go out clean slag iron, there is good anti-slag iron erosion performance, tapping duration (80 ~ 100min) normal table; Iron mouth degree of depth qualification rate is 98.0 ~ 98.5%, open Lou with reopening rate be 0.12 ~ 0.22%, boring motionless rate is 0%, tapping duration qualification rate 98.2 ~ 99.0%; The materials consumption during tapping outlet of stokehold: drill bit 0.01 ~ 0.02/stove, jumper bar 1/stove, O
2pipe 0/stove.
Embodiment 2
2), 25% coke, 20% silicon carbide (particle: powder=5: 5), 10% clay, 3% modified pitch, 5% kyanite, 2% metallic silicon power, 3% sericite adopt the method identical with embodiment 1 to prepare anhydrous stemming, distinguish and be that refractory mixture is made up of the component of following weight percents: 32% alumina (particle: powder=8:; Based on the gross weight of refractory mixture, add the combined binder of 17.5%; This combined binder is made up of tar and soybean oil, and the part by weight of tar and soybean oil is 9: 1.
Above-mentioned anhydrous stemming is applied in 3200m
3on blast furnace taphole, use 120 stoves, all detect often refining a stove, the using property data changing conditions of stemming is as follows: the horse summer value of stemming 60 DEG C is 0.50 ~ 0.60MPa, iron mouth can be met beat mud degree of depth 3.3m, on time tapping outlet and go out clean slag iron, there is good anti-slag iron erosion performance, tapping duration (100 ~ 120min) normal table; Iron mouth degree of depth qualification rate is 97.0 ~ 98.2%, open Lou with reopening rate be 0.12 ~ 0.22%, boring motionless rate is 0%, tapping duration qualification rate 98.2 ~ 99.0%; The materials consumption during tapping outlet of stokehold: drill bit 0.01 ~ 0.02/stove, jumper bar 1/stove, O
2pipe 0/stove.
Embodiment 3
3), 20% coke, 15% silicon carbide, 15% clay, 3% modified pitch, 2% metallic silicon power, 3% sericite adopt the method identical with embodiment 1 to prepare anhydrous stemming, distinguish and be that refractory mixture is made up of the component of following weight percents: 42% alumina (particle: powder=7:; Based on the gross weight of refractory mixture, add the combined binder of 16%; This combined binder is made up of tar and soybean oil, and the part by weight of tar and soybean oil oil is 9: 1.
This anhydrous stemming is applied in 2000m
3on the iron mouth of blast furnace, use 120 stoves, all detect often refining a stove, the using property data changing conditions of stemming is as follows: the horse summer value of stemming 60 DEG C is 0.45 ~ 0.50, iron mouth can be met beat mud degree of depth 2.7m, on time tapping outlet and go out clean slag iron, there is good anti-slag iron erosion performance, tapping duration (80 ~ 120min) normal table; Iron mouth degree of depth qualification rate is 99.0 ~ 99.5%, open Lou with reopening rate be 0.10 ~ 0.20%, boring motionless rate is 0%, tapping duration qualification rate 97.2 ~ 99.0%; The materials consumption during tapping outlet of stokehold: drill bit 0.01 ~ 0.02/stove, jumper bar 1/stove, O
2pipe 0/stove.
Anhydrous stemming for blast furnace tool of the present invention has the following advantages:
1, this Anhydrous stemming for blast furnace can meet the requirement of intensification of smelting process in BF well, the ability that the tapping outlet difficulty that stemming of solving over occurs in using, partially short, the anti-slag iron of tapping duration corrode and washes away is less than normal, easily ooze the problems such as stove equal materials consumption when iron leaks iron, stokehold tapping outlet is higher, the discharge of blast furnace taphole slag iron is evenly normal, ensure that the normal production of blast furnace.
2, this Anhydrous stemming for blast furnace improves iron mouth degree of depth qualification rate, reduce open Lous with reopening rate and bores motionless rate, more by force, the moisture that iron mouth opens probability leakage and iron mouth reduces greatly for prolongation tapping duration, antiscour and corrosion resistance.
Claims (9)
1. an anhydrous stemming, is made up of refractory mixture and combined binder, it is characterized in that,
Based on the gross weight of described refractory mixture, described refractory mixture composed as follows:
The alumina of 10 ~ 45%;
The silicon carbide of 8 ~ 20%;
The coke of 0 ~ 30%;
The clay of 0 ~ 20%;
The modified pitch of 0 ~ 8%;
The kyanite of 4 ~ 6%;
2 ~ 6% sericites;
The metallic silicon power of 1 ~ 3%; And
Described combined binder is (9 ~ 9.5) by weight ratio: tar and the grease of (0.5 ~ 1) form;
The mass ratio of described refractory mixture and described combined binder is 100: (13 ~ 20).
2. anhydrous stemming according to claim 1, described alumina to be alumina content be more than 85% alumine.
3. anhydrous stemming according to claim 1, the purity of described silicon carbide is more than 80%.
4. anhydrous stemming according to claim 1, described refractory mixture is made up of particulate fraction and powder part.
5. anhydrous stemming according to claim 4, described particulate fraction comprises coke granule, alumina particle and silicon-carbide particle, and described powder part comprises alumina powder, sic powder, clay powder, kyanite powder, metallic silicon power, sericite in powder and modified pitch powder.
6. anhydrous stemming according to claim 5, the particle diameter of described alumina particle is 0 ~ 3mm, the particle diameter of described silicon-carbide particle is 0 ~ 3mm, the particle diameter of described coke grain is 0 ~ 4mm, the particle diameter of described alumina powder, sic powder is 180 orders, the particle diameter of described sericite in powder, clay powder is 200 orders, and the particle diameter of described modified pitch powder, kyanite powder is 120 orders, and the particle diameter of described metallic silicon power is 325 orders.
7. anhydrous stemming according to claim 1, decomposes at the temperature of described grease more than 500 DEG C.
8. anhydrous stemming according to claim 1, the softening temperature of described modified pitch is 105 ~ 115 DEG C.
9. anhydrous stemming according to claim 4, the weight ratio of described particulate fraction and described powder part is (3 ~ 7): (7 ~ 3).
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106946554A (en) * | 2017-03-31 | 2017-07-14 | 巩义市顺祥耐材有限公司 | A kind of anhydrous stemming |
| CN107673756A (en) * | 2017-09-11 | 2018-02-09 | 濮阳濮耐高温材料（集团）股份有限公司 | Mineral hot furnace magnesia anhydrous stemming and preparation method thereof |
| CN107867867A (en) * | 2016-09-26 | 2018-04-03 | 湖南永盛高新耐火材料有限公司 | A kind of high-performance anhydrous stemming of graphene-containing and preparation method thereof |
| CN108101557A (en) * | 2017-12-12 | 2018-06-01 | 常州明华运输有限公司 | A kind of special anhydrous stemming of blast furnace |
| CN115321965A (en) * | 2022-08-31 | 2022-11-11 | 湖南湘钢瑞泰科技有限公司 | Anhydrous stemming and preparation method thereof |
| CN116354705A (en) * | 2023-04-17 | 2023-06-30 | 天津巴莫科技有限责任公司 | Heat-conducting refractory mortar and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107867867A (en) * | 2016-09-26 | 2018-04-03 | 湖南永盛高新耐火材料有限公司 | A kind of high-performance anhydrous stemming of graphene-containing and preparation method thereof |
| CN106946554A (en) * | 2017-03-31 | 2017-07-14 | 巩义市顺祥耐材有限公司 | A kind of anhydrous stemming |
| CN107673756A (en) * | 2017-09-11 | 2018-02-09 | 濮阳濮耐高温材料（集团）股份有限公司 | Mineral hot furnace magnesia anhydrous stemming and preparation method thereof |
| CN107673756B (en) * | 2017-09-11 | 2019-10-29 | 濮阳濮耐高温材料（集团）股份有限公司 | Mineral hot furnace magnesia anhydrous stemming and preparation method thereof |
| CN108101557A (en) * | 2017-12-12 | 2018-06-01 | 常州明华运输有限公司 | A kind of special anhydrous stemming of blast furnace |
| CN115321965A (en) * | 2022-08-31 | 2022-11-11 | 湖南湘钢瑞泰科技有限公司 | Anhydrous stemming and preparation method thereof |
| CN116354705A (en) * | 2023-04-17 | 2023-06-30 | 天津巴莫科技有限责任公司 | Heat-conducting refractory mortar and preparation method thereof |
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Application publication date: 20160106 |