CN102584284B - Anhydrous stemming for blast furnace - Google Patents
Anhydrous stemming for blast furnace Download PDFInfo
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- CN102584284B CN102584284B CN 201210020925 CN201210020925A CN102584284B CN 102584284 B CN102584284 B CN 102584284B CN 201210020925 CN201210020925 CN 201210020925 CN 201210020925 A CN201210020925 A CN 201210020925A CN 102584284 B CN102584284 B CN 102584284B
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Abstract
The invention discloses anhydrous stemming for a blast furnace. The anhydrous stemming is made of the following raw materials in percentage by weight: 16-22 percent of alumina, 18-22 percent of coke, 14-16 percent of clay, 18-22 percent of composite powder, 6-7 percent of modified pitch, 4-6 percent of kyanite and 11-18 percent of composite binder. The composite binder consists of tar and anthracene oil, wherein the weight ratio of tar to anthracene oil is 3:7. The composite powder consists of the following raw materials in percentage by weight: 34-38 percent of brown aluminum oxide, 14-18 percent of sericite, 18-22 percent of silicon carbide and 26-30 percent of silicon nitride. The anhydrous stemming for the blast furnace has the advantages that the qualification rate of iron notch depth is improved, the opening leakage and reopening rate and the dill immobility rate are reduced, the molten iron drainage time is prolonged, the anti-scouring and anti-erosion capacity is stronger, the probability of iron notch opening leakage and the moisture of the iron notch are greatly reduced and the material consumption during iron notch opening at the front of the furnace is lower.
Description
Technical field
The present invention relates to a kind ofly for the stemming on the blast furnace taphole, relate in particular to a kind of Anhydrous stemming for blast furnace.
Background technology
Because maximization, the long service life of modern blast furnace, the increase of tap a blast furnace time growth and slag flowing molten iron amount is had higher requirement to the stable and maintenance of blast furnace iron notch working order.Keep the smooth operation of furnace high yield, the key of guaranteeing stable operation is the degree of depth of iron notch, and the performance of stemming is the key that guarantees the iron notch steady operation.
The stemming quality is very large to the intensity effect of mud drum, and particularly blast furnace day taps a blast furnace number of times at 18～22 times behind strengthening smelting in recent years, have in addition be increased to 28 times.Therefore, iron port gun mud is required that enough refractoriness will be arranged, suitable void content, and stronger anti-molten iron washes away, erosional competency, simultaneously preferably ventilation property will be arranged, be easy to oven dry and do not split, sintering character is good, and intensity is high, the opening performance is good, and environmental pollution is little, also suitable plasticity-etc. will be arranged.
In the 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 take coke powder, clay, grog, pitch etc. as main batching, and the ability that anti-slag, iron liquid corrode and washes away is relatively poor.Anhydrous stemming is take corundum, silicon carbide, coke powder, clay, wedding agent etc. as main batching, although intensity increases to some extent, the ability that anti-slag, iron liquid corrode and washes away strengthens to some extent, also comes with some shortcomings in actual use.
Above-mentioned anhydrous stemming is applied in 1350m
3On the blast furnace taphole, use 80 stoves, every refining one stove is all detected, the use properties average index situation of stemming is as follows: iron mouth degree of depth qualification rate 81.82%, open Lou and reopening rate 10.23%, and bore motionless rate 5.88%, the time qualification rate 90.87% of tapping a blast furnace; Materials consumption during the stokehold tapping outlet: 0.5/stove of drill bit, 0.17/stove of front drilling rod, rear drilling rod 0.63/stove, O
21.44/stove of pipe.The defectives such as therefore, it is partially short that the time of tapping a blast furnace in use appears in anhydrous stemming of the prior art, and the ability that anti-slag iron corrodes and washes away is less than normal, easily oozes iron and leak iron, and the material that average every stove consumes is higher.
Summary of the invention
For above-mentioned the deficiencies in the prior art part, the invention provides a kind of have higher intensity and plasticity-, prolong and put the iron time, reduction is opened Lou and the Anhydrous stemming for blast furnace of reopening rate, the motionless rate of brill and materials consumption.
In order to solve the problems of the technologies described above, the present invention has adopted following technical scheme: a kind of Anhydrous stemming for blast furnace, made by following materials: 16～22% alumina, 18～22% cokes, 14～16% clays, 18～22% composite powders, 6～7% modified pitches, 4～6% kyanites and 11～18% combined binders;
Combined binder is comprised of tar and carbolineum, and the part by weight of tar and carbolineum is 3:7; Composite powder is comprised of following weight percent raw material: 34～38% brown corundum, 14～18% sericites, 18～22% silicon carbide and 26～30% silicon nitrides.
As a preferred embodiment of the present invention, Anhydrous stemming for blast furnace is made by following materials: 20% alumina, 20% coke, 15% clay, 20% composite powder, 6.5% modified pitch, 5% kyanite and 13.5% combined binder;
Combined binder is comprised of tar and carbolineum, and the part by weight of tar and carbolineum is 3:7; Composite powder is comprised of following weight percent raw material: 36% brown corundum, 16% sericite, 20% silicon carbide and 28% silicon nitride.
As another kind of preferred version of the present invention, the particle diameter of alumina is 0.02～2.2mm, and the particle diameter of coke is 0.15～2.5mm, and the particle diameter of clay is 0.012～0.044mm, and the particle diameter of kyanite is 10～80mm, and the particle diameter of composite powder is 0.02～0.4mm.
Compare with anhydrous stemming of the prior art, a kind of Anhydrous stemming for blast furnace of the present invention has following advantage:
1, this Anhydrous stemming for blast furnace can satisfy the requirement of intensification of smelting process in BF well, solved partially short, the problem such as anti-slag iron corrodes and the ability of washing away is less than normal, easily ooze iron when leaking iron, the stokehold tapping outlet equal materials consumption of stove is higher of the time of tapping a blast furnace that occurs during stemming uses in the past, the discharging of blast furnace taphole slag iron is evenly normal, has guaranteed the normal production of blast furnace.
2, this Anhydrous stemming for blast furnace has improved iron mouth degree of depth qualification rate, reduces to open with the reopening rate with Louing and bore motionless rate, and it is stronger that iron time, antiscour and corrosion resistance are put in prolongation, the iron mouth open leakage probability and the moisture of iron mouth greatly reduce.
Embodiment
A kind of Anhydrous stemming for blast furnace is made by following materials: 16～22% alumina, 18～22% cokes, 14～16% clays, 18～22% composite powders, 6～7% modified pitches, 4～6% kyanites and 11～18% combined binders.Combined binder is comprised of tar and carbolineum, and the part by weight of tar and carbolineum is 3:7; Composite powder is comprised of following weight percent raw material: 34～38% brown corundum, 14～18% sericites, 18～22% silicon carbide and 26～30% silicon nitrides.
The particle diameter of alumina is 0.02～2.2mm, and the particle diameter of coke is 0.15～2.5mm, and the particle diameter of clay is 0.012～0.044mm, and the particle diameter of kyanite is 10～80mm, and the particle diameter of composite powder is 0.02～0.4mm.
When making this Anhydrous stemming for blast furnace, first coke is added pug mill and be ground into the powdery that particle diameter is 0.15～2.5mm, by the step of alumina → clay → kyanite → composite powder → modified pitch → combined binder raw material is added then that the system of grinding forms in the pug mill.
This Anhydrous stemming for blast furnace is applied in 1350m
3On the blast furnace taphole, with five groups (every group is used 80 stoves) as example, every refining one stove is all detected, the using property data changing conditions of stemming is as follows: stemming has higher intensity and plasticity-, tapping outlet and go out clean slag iron on time, have preferably anti-slag iron erosion performance, put the iron time (45～100min) normal stablizing; Iron mouth degree of depth qualification rate is 97.66～98.2%, and opening is 0.28～0.33% with the reopening rate Lou, and boring motionless rate is 0.22～0.32%, the time qualification rate 98.4～98.8% of tapping a blast furnace; Materials consumption during the stokehold tapping outlet: 0.015～0.02/stove of drill bit, 0.025～0.03/stove of front drilling rod, 0.025～0.03/stove of rear drilling rod, O
20.2～0.3/stove of pipe.
Embodiment 1
A kind of Anhydrous stemming for blast furnace is made by following materials: 16% alumina, 22% coke, 16% clay, 18% composite powder, 6% modified pitch, 4% kyanite and 18% combined binder.Combined binder is comprised of tar and carbolineum, and the part by weight of tar and carbolineum is 3:7; Composite powder is comprised of following weight percent raw material: 34% brown corundum, 14% sericite, 22% silicon carbide and 30% silicon nitride.
The particle diameter of alumina is 0.02～2.2mm, and the particle diameter of coke is 0.15～2.5mm, and the particle diameter of clay is 0.012～0.044mm, and the particle diameter of kyanite is 10～80mm, and the particle diameter of composite powder is 0.02～0.4mm.
When making this Anhydrous stemming for blast furnace, first coke is added pug mill and be ground into the powdery that particle diameter is 0.15～2.5mm, by the step of alumina → clay → kyanite → composite powder → modified pitch → combined binder raw material is added then that the system of grinding forms in the pug mill.
This Anhydrous stemming for blast furnace is applied in 1350m
3On the blast furnace taphole, use 80 stoves, every refining one stove is all detected, the use properties average index situation of stemming is as follows: stemming has higher intensity and plasticity-, tapping outlet and go out clean slag iron on time, have preferably anti-slag iron erosion performance, put the iron time (45～100min) normal stablizing; Iron mouth degree of depth qualification rate is 97.66%, and opening is 0.33% with the reopening rate Lou, and boring motionless rate is 0.32%, the time qualification rate 98.4% of tapping a blast furnace; Materials consumption during the stokehold tapping outlet: 0.02/stove of drill bit, 0.03/stove of front drilling rod, 0.03/stove of rear drilling rod, O
20.3/stove of pipe.
Embodiment 2
A kind of Anhydrous stemming for blast furnace is made by following materials: 20% alumina, 20% coke, 15% clay, 20% composite powder, 6.5% modified pitch, 5% kyanite and 13.5% combined binder.Combined binder is comprised of tar and carbolineum, and the part by weight of tar and carbolineum is 3:7; Composite powder is comprised of following weight percent raw material: 36% brown corundum, 16% sericite, 20% silicon carbide and 28% silicon nitride.
The particle diameter of alumina is 0.02～2.2mm, and the particle diameter of coke is 0.15～2.5mm, and the particle diameter of clay is 0.012～0.044mm, and the particle diameter of kyanite is 10～80mm, and the particle diameter of composite powder is 0.02～0.4mm.
When making this Anhydrous stemming for blast furnace, first coke is added pug mill and be ground into the powdery that particle diameter is 0.15～2.5mm, by the step of alumina → clay → kyanite → composite powder → modified pitch → combined binder raw material is added then that the system of grinding forms in the pug mill.
This Anhydrous stemming for blast furnace is applied in 1350m
3On the blast furnace taphole, use 80 stoves, every refining one stove is all detected, the use properties average index situation of stemming is as follows: stemming has higher intensity and plasticity-, tapping outlet and go out clean slag iron on time, have preferably anti-slag iron erosion performance, put the iron time (45～100min) normal stablizing; Iron mouth degree of depth qualification rate is 98.2%, and opening is 0.28% with the reopening rate Lou, and boring motionless rate is 0.22%, the time qualification rate 98.8% of tapping a blast furnace; Materials consumption during the stokehold tapping outlet: 0.015/stove of drill bit, 0.025/stove of front drilling rod, 0.025/stove of rear drilling rod, O
20.2/stove of pipe.
Embodiment 3
A kind of Anhydrous stemming for blast furnace is made by following materials: 22% alumina, 18% coke, 14% clay, 22% composite powder, 7% modified pitch, 6% kyanite and 11% combined binder.Wherein: combined binder is comprised of tar and carbolineum, and the part by weight of tar and carbolineum is 3:7; Composite powder is comprised of following weight percent raw material: 38% brown corundum, 18% sericite, 18% silicon carbide and 26% silicon nitride.
The particle diameter of alumina is 0.02～2.2mm, and the particle diameter of coke is 0.15～2.5mm, and the particle diameter of clay is 0.012～0.044mm, and the particle diameter of kyanite is 10～80mm, and the particle diameter of composite powder is 0.02～0.4mm.
When making this Anhydrous stemming for blast furnace, first coke is added pug mill and be ground into the powdery that particle diameter is 0.15～2.5mm, by the step of alumina → clay → kyanite → composite powder → modified pitch → combined binder raw material is added then that the system of grinding forms in the pug mill.
This Anhydrous stemming for blast furnace is applied in 1350m
3On the blast furnace taphole, use 80 stoves, every refining one stove is all detected, the use properties average index situation of stemming is as follows: stemming has higher intensity and plasticity-, tapping outlet and go out clean slag iron on time, have preferably anti-slag iron erosion performance, put the iron time (45～100min) normal stablizing; Iron mouth degree of depth qualification rate is 98%, and opening is 0.3% with the reopening rate Lou, and boring motionless rate is 0.28%, the time qualification rate 98.6% of tapping a blast furnace; Materials consumption during the stokehold tapping outlet: 0.018/stove of drill bit, 0.027/stove of front drilling rod, 0.027/stove of rear drilling rod, O
20.25/stove of pipe.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (2)
1. an Anhydrous stemming for blast furnace is characterized in that, is made by following materials: 20% alumina, 20% coke, 15% clay, 20% composite powder, 6.5% modified pitch, 5% kyanite and 13.5% combined binder;
Combined binder is comprised of tar and carbolineum, and the part by weight of tar and carbolineum is 3:7; Composite powder is comprised of following weight percent raw material: 36% brown corundum, 16% sericite, 20% silicon carbide and 28% silicon nitride.
2. a kind of Anhydrous stemming for blast furnace according to claim 1 is characterized in that, the particle diameter of alumina is 0.02～2.2mm, the particle diameter of coke is 0.15～2.5mm, the particle diameter of clay is 0.012～0.044mm, and the particle diameter of kyanite is 10～80mm, and the particle diameter of composite powder is 0.02～0.4mm.
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| CN 201210020925 CN102584284B (en) | 2012-01-30 | 2012-01-30 | Anhydrous stemming for blast furnace |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103011858B (en) * | 2012-12-15 | 2014-03-05 | 李跃普 | Stemming for blast furnace tap hole |
| CN103880444B (en) * | 2013-04-15 | 2016-05-18 | 渑池金华新材料有限公司 | A kind of environment-friendly type anhydrous stemming and preparation method thereof |
| CN105237012B (en) * | 2015-11-04 | 2017-05-24 | 湖南立达高新材料有限公司 | Stemming for taphole of ore hearth and preparation method thereof |
| CN107311681A (en) * | 2017-08-09 | 2017-11-03 | 江苏江能新材料科技有限公司 | A kind of smokeless environment-friendly stemming and manufacture method |
| CN111825469B (en) * | 2020-07-29 | 2023-03-17 | 郑州科信炉料有限公司 | Environment-friendly anhydrous stemming for single-taphole blast furnace and preparation method thereof |
| CN112551111A (en) * | 2020-11-24 | 2021-03-26 | 无锡市宝宜耐火材料有限公司 | Automatic change stemming shaping and cut packaging system |
| CN113149665B (en) * | 2021-04-08 | 2022-06-14 | 北京联合荣大工程材料股份有限公司 | Environment-friendly bonding agent and stemming for blast furnace |
| CN113816728A (en) * | 2021-06-23 | 2021-12-21 | 江苏新环美节能技术有限公司 | Stemming for high-strength smelting super-huge blast furnace taphole |
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| CN1107662C (en) * | 2000-11-02 | 2003-05-07 | 石家庄钢铁有限责任公司 | Blast furnace taphole stemming with low water content and its preparing method |
| CN101857445B (en) * | 2010-05-21 | 2012-07-25 | 河南华西耐火材料有限公司 | Anhydrous stemming for blast furnace |
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