CN103360096A - Tap hole stemming for large-scale blast furnace and preparation method - Google Patents
Tap hole stemming for large-scale blast furnace and preparation method Download PDFInfo
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- CN103360096A CN103360096A CN2013103282664A CN201310328266A CN103360096A CN 103360096 A CN103360096 A CN 103360096A CN 2013103282664 A CN2013103282664 A CN 2013103282664A CN 201310328266 A CN201310328266 A CN 201310328266A CN 103360096 A CN103360096 A CN 103360096A
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Abstract
The invention discloses a tap hole stemming for a large-scale blast furnace and a preparation method. The stemming is composed of a binder and the following ingredients: by weight, 40-50 parts of brown aluminum oxide, 8-15 parts of silicon carbide, 6-12 parts of ferro-silicon nitride, 10-15 parts of clay, 6-9 parts of silicon powder, 2-5 parts of alpha-Al2O3, 6-10 parts of coke powder, 1-3 parts of graphite, and 4-6 parts of high-temperature pitch. The binder is tar. The preparation method comprises steps: according to the above ingredients and weight parts, raw materials are prepared, and mixed uniformly, then tar is added into the raw materials, the mixture is subjected to roller compaction and mixing to form a stemming material. The addition amount of the tar is controlled to make the Marshall value of the stemming material be 1100-1400 KPa, the stemming material is then subjected to pressing and molding to obtain final products. The prepared stemming is advantaged by good integrated performances, high intensity, small average hole size, good heat conductivity coefficient and good performances of resistance to slag and iron, corrosion and washing.
Description
Technical field
The present invention relates to a kind of large blast furnace with iron notch stemming and preparation method thereof, belong to the ferrous metallurgy technical field of refractory materials.
Background technology
In recent years, along with developing rapidly of Iron And Steel Industry, the development process that blast furnace maximizes is also accelerated thereupon, the aspects such as that the technical superiority that blast furnace maximizes is mainly reflected in is efficiently intensive, energy-saving and emission-reduction, low consumption environment protection and information control.Meanwhile, blast furnace maximizes and is also promoting effectively the development of refractory technology.Large blast furnace is high because of its output, and the single iron influx is large, and is high to the requirement of stemming quality.It requires stemming must have excellent anti-slag iron erosion performance, good bonding strength, and the characteristics of beating easily mud and opening, thus ensure the process stabilization direct motion of tapping a blast furnace.Blast furnace mud of the prior art also can't satisfy the service requirements of large blast furnace fully.Chinese patent CN1673395A " anhydrous stemming of iron notch for blast furnace " provides a kind of blast furnace mud.This invention component is the percentage meter by weight: fused alumina 15～45%, burnt grain 10～40%, Guangxi mud 10～25%, silicon carbide 6～12%, sericite 5～9%, talcum powder 1～3%, micro crystal graphite 1～2%, compound additive 13～23%.Technical performance index after 1300 ℃ * 3h of this invention thermal treatment is: compressive strength 16.8MPa, apparent porosity 33%, volume density 1.96g/cm
3, according to introducing this stemming in the embodiment at 1204m
3Preferably effect is arranged on the blast furnace.Technical indicator and using experience according to this stemming can't be used on the large blast furnace.The stemming that Chinese patent CN523120A " anhydrous stemming for blast furnace " provides forms (by weight percentage %): thick brown corundum 1～4%, thin brown corundum 2～5%, thick mullite 7～15%, thin mullite 9～20%, coke powder 15～20%, clay 10～19%, silicon carbide 7～11%, sericite 5～8%, pitch 2～4%, carbolineum 15～25%.It is wedding agent that this patent adopts carbolineum, but the volatile quantity of carbolineum is more than tar, and fixed carbon content is well below tar, and does not have anti-slag iron erosion performance index, therefore can't better meet the service requirements of large blast furnace.Learn that in sum the stemming thermal conductivity that uses at present is less, intensity at low temperatures is lower, the anti-molten iron of stemming wash away with erosion performance a little less than.
Summary of the invention
The object of the present invention is to provide a kind of large blast furnace iron notch stemming and preparation method thereof.This stemming has good over-all properties, and its intensity is high, and mean pore size is little, and thermal conductivity is better, the iron of anti-slag water eroding and flooding excellent property.
For achieving the above object, large blast furnace of the present invention comprises the component of binding agent and following parts by weight with the iron notch stemming:
Palm fibre corundum: 40～50 weight parts, wherein the weight percent of the brown corundum of 1mm＜particle diameter≤3mm in whole brown corundum is 40 ~ 50%, the weight percent of the brown corundum of 320 orders＜particle diameter≤1mm in whole brown corundum be 20 ~ 30%, the weight percent of particle diameter≤320 purposes palm fibre corundum in whole brown corundum is 25 ~ 35%;
Silicon carbide: 8～15 weight parts, the granularity of described silicon carbide are 0mm＜particle diameter≤1mm;
Ferro-silicon nitride: 6～12 weight parts, in the described ferro-silicon nitride, Si
3N
4Account for 75 ~ 80%, Fe and account for 12 ~ 16%, surplus is Fe
3Si and SiO
2The particle diameter of described ferro-silicon nitride≤180 orders;
Particle diameter≤200 purpose clays: 10～15 weight parts;
Silica flour: 6～9 weight parts, the particle diameter of described silica flour≤320 orders;
Alpha-alumina: 2～5 weight parts, the particle diameter of described Alpha-alumina≤5 μ m;
Coke powder: 6～10 weight parts, the granularity of described coke powder are 0mm＜particle diameter≤1mm;
Graphite: 1～3 weight part, the particle diameter of described graphite≤100 orders;
The hard pitch of 0mm＜particle diameter≤2mm (being that ring and ball softening point is 100 ~ 115 ℃ pitch): 4～6 weight parts;
Described binding agent is tar.
Further, described clay is one or both of Guangxi white clay and ring clay.
The large blast furnace of the present invention preparation method of iron notch stemming, carry out according to the following steps:
(1) prepares burden by said components and content;
(2) adding binding agent carbolineum, to make the horse summer value of pug be 1100～1400KPa, namely gets large blast furnace iron notch stemming after mixed grind, extruding, moulding.
The raw material of stemming of the present invention forms collocation rationally, and with brown corundum, silicon carbide is aggregate, by regulating ferro-silicon nitride content, adds the micro mists such as silica flour and Alpha-alumina, makes stemming have good over-all properties, and compared with prior art, it has following advantage:
(1) stemming of the present invention has been owing to introduced the simple substance silica flour, stemming in use, silica flour can with the substance reactions such as circumgranular carbon, oxygen, nitrogen, generate a large amount of β-SiC (S), SiO
2(S) and Si
2N
2The ceramic condensed phases such as O (S) come pack grain gap or pore, intercept or sealed porosity, reduce hole diameter, form little pore stemming; α-Al
2O
3Powder then is conducive to realize the tightly packed of feed particles on the one hand, reduces the void content of stemming, improves simultaneously＜1 μ m pore volume rate; Can promote on the other hand growing of β-SiC whisker, thereby intercept and sealed porosity, improve the microporous index.The anti-slag iron that the formation of little pore has improved stemming greatly corrodes and scouring capability.
(2) add graphite microparticles, increased the thermal conductivity of stemming, simultaneously owing to the good oilness of graphite, also improved the opening performance of stemming.
(3) reasonably combined use corundum, silicon carbide, the good refractory raw material of these anti-slag iron erosional competencyes of ferro-silicon nitride greatly improve the anti-molten iron of stemming, slag corrosion performance, thereby have guaranteed tapping a blast furnace the time of stemming.
Embodiment
The present invention is further detailed explanation below in conjunction with embodiment.
Large blast furnace of the present invention iron notch stemming, its component is by weight:
Palm fibre corundum: 40～50 weight parts, wherein granularity is that the weight percent of brown corundum in whole brown corundum of 1mm＜particle diameter≤3mm is 40 ~ 50%, the weight percent of the brown corundum of 320 orders＜particle diameter≤1mm in whole brown corundum be 20 ~ 30%, the weight percent of particle diameter≤320 purposes palm fibre corundum in whole brown corundum is 25 ~ 35%;
Silicon carbide: 8～15 weight parts, the granularity of described silicon carbide are 0mm＜particle diameter≤1mm;
Ferro-silicon nitride: 6～12 weight parts, the particle diameter of described ferro-silicon nitride≤180 orders;
Clay: 10～15 weight parts, the granularity of described clay≤200 orders;
Silica flour: 6～9 weight parts, the particle diameter of described silica flour≤320 orders;
Alpha-alumina: 2～5 weight parts, the particle diameter of described Alpha-alumina≤5 μ m;
Coke powder: 6～10 weight parts, the granularity of described coke powder are 0 mm＜particle diameter≤2mm;
Graphite: 1～3 weight part, the particle diameter of described graphite≤100 orders;
The hard pitch of 0mm＜particle diameter≤2mm: 4～6 weight parts;
Above-mentioned various raw materials are prepared burden, add again binding agent tar after mixing, roll after the adding, the formation pug mixes, the add-on of binding agent is controlled to be the horse summer value that makes pug and is 1100-1400KPa, after passing through again the mud extruder extrusion molding, can obtain large blast furnace of the present invention iron notch stemming.
Embodiment 1: prepare burden by following requirement, its component is counted by the quality percentage:
The brown corundum of 1mm＜particle diameter≤3mm: 20 weight parts;
The brown corundum of 320 orders＜particle diameter≤1mm: 10 weight parts;
Particle diameter≤320 purposes palm fibre corundum: 11 weight parts;
The silicon carbide of 0mm＜particle diameter≤1mm: 9 weight parts;
Particle diameter≤180 purpose ferro-silicon nitrides: 12 weight parts
Particle diameter≤200 purpose clays: 15 weight parts, described clay are the mixture of Guangxi white clay and ring clay, and wherein the Guangxi white clay is 8 weight parts, and the ring clay is 7 weight parts, and described ring clay is the product available from Wuhan mining company;
Particle diameter≤320 purpose silica flours: 7 weight parts;
The Alpha-alumina of particle diameter≤5 μ m: 3 weight parts;
The coke powder of 0mm＜particle diameter≤2mm: 6 weight parts;
Particle diameter≤100 purpose graphite: 2 weight parts;
The hard pitch of 0mm＜particle diameter≤2mm: 5 weight parts
With above-mentioned various raw materials in described ratio weighing and burden, add again tar after mixing, roll after the adding, the formation pug mixes, the add-on of tar is controlled to be the horse summer value that makes pug and is 1100-1400KPa,, after the extrusion molding of pug process mud extruder, can obtain large blast furnace of the present invention iron notch stemming.
The stemming that embodiment 1 is produced carries out the physicochemical property detection, and data see Table 1.
Table 1 large blast furnace iron notch stemming physical and chemical index (embodiment 1)
Embodiment 2: prepare burden by following requirement, its component is counted by the quality percentage:
The brown corundum of 1mm＜particle diameter≤3mm: 20 weight parts;
The brown corundum of 320 orders＜particle diameter≤1mm: 10 weight parts;
Particle diameter≤320 purposes palm fibre corundum: 10 weight parts;
The silicon carbide of 0mm＜particle diameter≤1mm: 15 weight parts;
Particle diameter≤180 purpose ferro-silicon nitrides: 7 weight parts
Particle diameter≤200 purpose clays: 11 weight parts, described clay are the Guangxi white clay;
Particle diameter≤320 purpose silica flours: 9 weight parts;
α--the aluminum oxide of particle diameter≤5 μ m: 2 weight parts;
The coke powder of 0mm＜particle diameter≤2mm: 7 weight parts;
Particle diameter≤100 purpose graphite: 3 weight parts;
The hard pitch of 0mm＜particle diameter≤2mm: 6 weight parts.
With above-mentioned various raw materials in described ratio weighing and burden, add again tar after mixing, roll after the adding, the formation pug mixes, the add-on of tar is controlled to be the horse summer value that makes pug and is 1100-1400KPa,, after the extrusion molding of pug process mud extruder, can obtain large blast furnace of the present invention iron notch stemming.
The stemming that embodiment 2 is produced carries out the physicochemical property detection, and data see Table 2.
Table 2 large blast furnace iron notch stemming physical and chemical index (embodiment 2)
Embodiment 3: prepare burden by following requirement, its component is counted by the quality percentage:
The brown corundum of 1mm＜particle diameter≤3mm: 20 weight parts;
The brown corundum of 320 orders＜particle diameter≤1mm: 12 weight parts;
Particle diameter≤320 purposes palm fibre corundum: 18 weight parts;
The silicon carbide of 0mm＜particle diameter≤1mm: 8 weight parts;
Particle diameter≤180 purpose ferro-silicon nitrides: 6 weight parts;
Particle diameter≤200 purpose clays: 10 weight parts, described clay is the ring clay, described ring clay is the product available from Wuhan mining company;
Particle diameter≤320 purpose silica flours: 6 weight parts;
α--the aluminum oxide of particle diameter≤5 μ m: 5 weight parts;
The coke powder of 0mm＜particle diameter≤2mm: 10 weight parts;
Particle diameter≤100 purpose graphite: 1 weight part;
The hard pitch of 0mm＜particle diameter≤2mm: 4 weight parts
With above-mentioned various raw materials in described ratio weighing and burden, add again tar after mixing, roll after the adding, the formation pug mixes, the add-on of tar is controlled to be the horse summer value that makes pug and is 1100-1400KPa, after the extrusion molding of pug process mud extruder, can obtain large blast furnace of the present invention iron notch stemming.
The stemming that embodiment 3 is produced carries out the physicochemical property detection, and data see Table 3.
Table 3 large blast furnace iron notch stemming physical and chemical index (embodiment 3)
More than the prepared stemming intensity of 3 embodiment high, especially little pore index is good, possesses good anti-slag iron erosional competency, higher thermal conductivity, in the blast furnace casting process, be conducive to smooth opening iron mouth, keep the iron mouth stable, can satisfy the service requirements that large blast furnace taps a blast furnace.
Claims (3)
1. a large blast furnace iron notch stemming comprises binding agent, and it is characterized in that: this stemming also comprises the component of following parts by weight:
Palm fibre corundum: 40～50 weight parts, wherein the weight percent of the brown corundum of 1mm＜particle diameter≤3mm in whole brown corundum is 40 ~ 50%, the weight percent of the brown corundum of 320 orders＜particle diameter≤1mm in whole brown corundum be 20 ~ 30%, the weight percent of particle diameter≤320 purposes palm fibre corundum in whole brown corundum is 25 ~ 35%;
Silicon carbide: 8～15 weight parts, the granularity of described silicon carbide are 0mm＜particle diameter≤1mm;
Ferro-silicon nitride: 6～12 weight parts, in the described ferro-silicon nitride, Si
3N
4Account for 75 ~ 80%, Fe and account for 12 ~ 16%, surplus is Fe
3Si and SiO
2The particle diameter of described ferro-silicon nitride≤180 orders;
Particle diameter≤200 purpose clays: 10～15 weight parts;
Silica flour: 6～9 weight parts, the particle diameter of described silica flour≤320 orders;
Alpha-alumina: 2～5 weight parts, the particle diameter of described Alpha-alumina≤5 μ m;
Coke powder: 6～10 weight parts, the granularity of described coke powder are 0mm＜particle diameter≤1mm;
Graphite: 1～3 weight part, the particle diameter of described graphite≤100 orders;
The hard pitch of 0mm＜particle diameter≤2mm: 4～6 weight parts;
Described binding agent is tar.
2. large blast furnace according to claim 1 iron notch stemming is characterized in that: described clay is one or both of Guangxi white clay and ring clay.
3. a large blast furnace claimed in claim 1 is with the preparation method of iron notch stemming, and it is characterized in that: the method comprises the steps
1) prepares burden by above-mentioned parts by weight;
2) add the laggard row of binding agent tar and roll, the formation pug that mixes, it is 1100～1400KPa that the add-on of tar is controlled to be the horse summer value that makes pug, then namely gets large blast furnace iron notch stemming after extruding, moulding.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103864448A (en) * | 2014-04-01 | 2014-06-18 | 郑州市瑞沃耐火材料有限公司 | Water-free stemming for medium and large blast furnace |
| CN104446556A (en) * | 2014-12-03 | 2015-03-25 | 武汉钢铁(集团)公司 | Blast-furnace taphole stemming prepared from ferrotitanium slag and preparation method of blast-furnace taphole |
| CN104446540A (en) * | 2014-11-19 | 2015-03-25 | 湖南湘钢瑞泰科技有限公司 | Anhydrous stemming and preparation method thereof |
| CN104478450A (en) * | 2014-12-04 | 2015-04-01 | 武汉钢铁(集团)公司 | Blast furnace stemming prepared from regenerated refractories and preparation method thereof |
| CN104817329A (en) * | 2015-04-10 | 2015-08-05 | 浙江锦诚耐火材料有限公司 | Preparation method of high-strength tap-hole fireproof concrete |
| CN105753490A (en) * | 2016-03-11 | 2016-07-13 | 鹤壁市荣铭科技有限公司 | Tap hole medium-temperature-sintering environment-friendly stemming for large- and medium-sized blast furnaces and preparation method of tap hole medium-temperature-sintering environment-friendly stemming |
| CN108276011A (en) * | 2018-03-02 | 2018-07-13 | 徐州苏牌高温新材料有限公司 | A kind of blast furnace iron notch stemming and preparation method thereof |
| CN108727042A (en) * | 2018-06-08 | 2018-11-02 | 武汉钢实炼铁修造安装有限公司 | A kind of novel blast-furnace tapping hole siliceous stemming and preparation method thereof |
| CN109293347A (en) * | 2018-10-12 | 2019-02-01 | 湖南立达高新材料有限公司 | A kind of mineral hot furnace tapping hole environmentally protective stemming and preparation method thereof |
| CN109836137A (en) * | 2019-04-15 | 2019-06-04 | 郑州市瑞沃耐火材料有限公司 | Blast furnace environment-friendly type anhydrous stemming |
| CN109987949A (en) * | 2019-03-25 | 2019-07-09 | 宜兴市泰科耐火材料有限公司 | Silicon carbide crusting resistant pouring material and preparation method thereof |
| CN115321995A (en) * | 2022-06-27 | 2022-11-11 | 无锡市宝宜耐火材料有限公司 | Stemming with good opening performance |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103864448A (en) * | 2014-04-01 | 2014-06-18 | 郑州市瑞沃耐火材料有限公司 | Water-free stemming for medium and large blast furnace |
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| CN104478450A (en) * | 2014-12-04 | 2015-04-01 | 武汉钢铁(集团)公司 | Blast furnace stemming prepared from regenerated refractories and preparation method thereof |
| CN104817329A (en) * | 2015-04-10 | 2015-08-05 | 浙江锦诚耐火材料有限公司 | Preparation method of high-strength tap-hole fireproof concrete |
| CN105753490A (en) * | 2016-03-11 | 2016-07-13 | 鹤壁市荣铭科技有限公司 | Tap hole medium-temperature-sintering environment-friendly stemming for large- and medium-sized blast furnaces and preparation method of tap hole medium-temperature-sintering environment-friendly stemming |
| CN108276011A (en) * | 2018-03-02 | 2018-07-13 | 徐州苏牌高温新材料有限公司 | A kind of blast furnace iron notch stemming and preparation method thereof |
| CN108727042A (en) * | 2018-06-08 | 2018-11-02 | 武汉钢实炼铁修造安装有限公司 | A kind of novel blast-furnace tapping hole siliceous stemming and preparation method thereof |
| CN109293347A (en) * | 2018-10-12 | 2019-02-01 | 湖南立达高新材料有限公司 | A kind of mineral hot furnace tapping hole environmentally protective stemming and preparation method thereof |
| CN109293347B (en) * | 2018-10-12 | 2021-05-18 | 湖南立达高新材料有限公司 | Green and environment-friendly stemming for submerged arc furnace taphole and preparation method thereof |
| CN109987949A (en) * | 2019-03-25 | 2019-07-09 | 宜兴市泰科耐火材料有限公司 | Silicon carbide crusting resistant pouring material and preparation method thereof |
| CN109836137A (en) * | 2019-04-15 | 2019-06-04 | 郑州市瑞沃耐火材料有限公司 | Blast furnace environment-friendly type anhydrous stemming |
| CN115321995A (en) * | 2022-06-27 | 2022-11-11 | 无锡市宝宜耐火材料有限公司 | Stemming with good opening performance |
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Application publication date: 20131023 |