CN104725063A - Environment-friendly stemming for blast furnace and preparation method thereof - Google Patents
Environment-friendly stemming for blast furnace and preparation method thereof Download PDFInfo
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- CN104725063A CN104725063A CN201510131805.4A CN201510131805A CN104725063A CN 104725063 A CN104725063 A CN 104725063A CN 201510131805 A CN201510131805 A CN 201510131805A CN 104725063 A CN104725063 A CN 104725063A
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Abstract
The invention provides environment-friendly stemming for a blast furnace. The stemming is prepared from aggregate, silicon carbide, titanium dioxide, white mud, coke dust, micropowder and a binding agent. The method for preparing the stemming comprises the following steps: proportioning aggregate, silicon carbide, titanium dioxide, white mud, coke dust and micropowder according to the mass percentage; performing dry mixing and grinding, adding the binding agent, and performing wet mixing and grinding to obtain the environment-friendly stemming for a blast furnace. The stemming has the advantages of small shrinkage rate, excellent thermal shock resistance, excellent washing resistance and excellent erosion resistance, and once tapping time reaches 100-180 minutes; in-situ generated TiC has an effect of protecting the furnace, and the service life of the furnace can be prolonged; T60 carbon-containing resin and phenolic resin are used as the binding agent to reduce generation of cancerogenic smoke and improve the operation environment.
Description
Technical field
The present invention relates to fire resisting material field, particularly a kind of blast furnace stemming, especially a kind of blast furnace environmental protection stemming, and preparation method thereof.
Background technology
Along with the development of the Iron And Steel Industry of China, blast furnace maximizes and has become a kind of trend, goes out the typical feature that iron is large, tapping duration length is big-and-middle-sized blast furnace.Therefore, the stemming material of shutoff iron notch is had higher requirement.At present, widely used Al
2o
3-SiC-C stemming main raw material is the high quality raw material such as various high-quality corundum, alumine and SiC, although performance is improved, using first resource in a large number, is all a kind of burden seriously to resources and environment.
Traditional Al
2o
3-SiC-C stemming mid-early stage blast-furnace production campaign result of use better, but in middle and later periods blast-furnace production campaign, suffer erosion for a long time and wash away due to iron mouth, this kind of stemming result of use declines greatly.Chinese patent CN102234199A discloses a kind of high-titanium furnace protection stemming, and this invention have employed the raw material such as ilmenite concentrate, rutile, higher to ingredient requirement, and needs segmentation to install two kinds of stemmings, brings larger inconvenience to flushing and casting.Chinese patent CN1025157789A discloses a kind of blast furnace mud for iron mouth Repair and protection; this invention employs lower-cost vanadium titanium-iron powder; flushing and casting have also been obtained optimization; but in vanadium titanium-iron powder; the content of vanadium titanium is lower; action of protecting furnace is limited, and when iron level is wherein too high, can have a strong impact on the hot strength of stemming.
Summary of the invention
For the weak point existed in the problems referred to above, the invention provides a kind of blast furnace environmental protection stemming, and preparation method thereof, have that shrinking percentage is little, thermal shock resistance, scour resistance, erosion-resisting characteristics are excellent, a tapping duration is up to 100 ~ 180min; Generated in-situ TiC has furnace retaining effect, can improve furnace life; Use the generation that T60 contains carbon resin, resol decreases carcinogenic flue gas as bonding agent, improve operating environment.
For achieving the above object, the invention provides a kind of blast furnace environmental protection stemming, comprise aggregate, silicon carbide, titanium dioxide, white clay, coke powder and micro mist.
Above-mentioned a kind of blast furnace environmental protection stemming, wherein, the mass percent of above-mentioned raw materials is: aggregate 40 ~ 50%, silicon carbide 10 ~ 20%, titanium dioxide 6 ~ 10%, white clay 10 ~ 14%, coke powder 7 ~ 10%, micro mist 5 ~ 9%.
Above-mentioned a kind of blast furnace environmental protection stemming, wherein, the particle diameter of described aggregate is divided into 1 ~ 3mm and 0 ~ 1mm two kinds, the mass ratio of the two is 5:4, the particle diameter of described silicon carbide is less than 0.088mm, and the particle diameter of described titanium dioxide is less than 0.045mm, and the particle diameter of described white clay is less than 0.088mm, the particle diameter of described coke powder is 0.055 ~ 0.088mm, and the particle diameter of described micro mist is 0.055 ~ 0.088mm.
Above-mentioned a kind of blast furnace environmental protection stemming, wherein, described aggregate is alumine and with rear waste and old slide brick; Silicon carbide is 90SiC and one or both the mixing with rear waste and old iron runner material; Micro mist is waste and old iron runner material after the use of removal of impurities process.
Above-mentioned a kind of blast furnace environmental protection stemming, wherein, Al in described alumine
2o
3mass percentage be greater than 88%, described with rear waste and old slide brick after removal of impurities process, Fe
2o
3mass percentage be less than 0.5%;
In described 90SiC, the mass percentage of SiC is greater than 90%;
Described with rear waste and old iron runner material after removal of impurities process, Fe
2o
3mass percentage be less than 0.5%;
TiO in described titanium dioxide
2mass percentage be greater than 95%.
Above-mentioned a kind of blast furnace environmental protection stemming, wherein, described alumine and the described mass ratio with rear waste and old slide brick are 1:1 ~ 2:1.
Above-mentioned a kind of blast furnace environmental protection stemming, wherein, when silicon carbide be 90SiC and the compound with rear waste and old iron runner material time, the ratio of the two is 1:1 ~ 1:3.
Above-mentioned a kind of blast furnace environmental protection stemming, wherein, also comprises bonding agent, and described bonding agent content is 14 ~ 24% of stemming material total mass.
Above-mentioned a kind of blast furnace environmental protection stemming, wherein, described bonding agent is that T60 contains carbon resin and phenol-formaldehyde resin powder, and described T60 is 2:1 ~ 4:1 containing carbon resin and described phenol-formaldehyde resin powder mass ratio.
Above-mentioned a kind of blast furnace environmental protection stemming, wherein, the particle diameter of described phenol-formaldehyde resin powder is 0.088 ~ 0.1mm.
The present invention also provides a kind of preparation method of blast furnace environmental protection stemming, aggregate, silicon carbide, titanium dioxide, white clay, coke powder and micro mist are carried out proportioning according to respective mass percent, after being dry mixed, rolling, add bonding agent, after wet mixing, rolling, to obtain blast furnace environmental protection stemming.
Compared with prior art, the present invention has the following advantages
(1) more titanium dioxide is employed in raw material of the present invention.TiO more than 1300 DEG C
2meeting reacts in-situ formation of TiC with the C around it; TiC not only has high refractoriness (can reach 3000 DEG C), excellent heat conductivity; and have very strong adhesive ability between the refractory materials of TiC and blast furnace hearth, furnace bottom; concerning the blast furnace of middle and later periods in furnace life; iron mouth corrodes serious; the generated in-situ TiC of the present invention can make the protected effect of stemming give full play to, and plays the effect of furnace retaining.In addition, TiC and blast-furnace slag react, and slag viscosity can be made significantly to increase, and reduce the erosion of slag and molten iron and wash away.Therefore, when common stemming result of use is bad, uses the present invention can obtain good effect, can also the blast-furnace production campaign be improved.
(2) a large amount of rear waste sliding brick and iron runner material is employed in raw material of the present invention.Wherein, be high-quality corundum by the main component in rear waste sliding brick, by after its simple process be used as raw material aggregate, not only decrease the usage quantity of first resource, also reduce waste refractory materials bring the problems such as serious soil, contaminate environment; With in rear discarded iron runner material, not only containing a large amount of high-quality corundum, simultaneously also containing a large amount of SiC, can be used as supplementing of raw material SiC, what is more important, with defining many small mullites, Sialon and Si in rear iron runner material
3n
4phase, be used in stemming, significantly can promote the anti-thermal shock of stemming, antiscour, the performance such as anti-oxidant, and owing to just there is these high-quality thing phases before use, make stemming can obtain comparatively excellent low-temperature performance after clamp-oning, to generate compared with traditional stemming of these high-quality phases in pyroreaction with relying on raw material, shrinkage of the present invention is very little, and use properties is more reliable, stablize.In addition, be part material owing to employing with rear waste refractory materials, also reduce production cost of the present invention.
(3) white clay used in raw material of the present invention, its main component is Al
2o
3and SiO
2.Tradition stemming usually also can use white clay and carry out acceleration of sintering, but the present invention is on the basis that this acts on, by the wherein low-melting impurities phase such as iron content, the liquid phase of trace is produced when high temperature, and with mullite small in rear discarded iron runner material for crystal seed, continue on its basis to generate the larger mullite of particle diameter, the thermal shock resistance of stemming is strengthened further, and improves compactness and the hot strength of stemming.
(4) present invention uses T60 containing carbon resin and phenol-formaldehyde resin powder is bonding agent, and use procedure does not produce harmful smoke, and traditional Al
2o
3the bonding agents such as the pitch that-SiC-C stemming uses, tar, can produce the materials such as carcinogenic benzopyrene, therefore, the present invention has obvious characteristic of environmental protection.The T60 that the present invention uses is containing carbon resin, and 200 DEG C below still can keep good mobility, and resol below 200 DEG C time just start to solidify, comparatively fast, the two uses to obtain and extrudes the degree of depth preferably solidification rate under suitable proportion.In addition, T60, can at formation " mushroom " mud drum containing after carbon resin hot setting, increases the bond area between new mud drum and furnace wall, old mud drum, improves bulk strength and the iron mouth pore passage scour resistance of mud drum.
Embodiment
The invention provides a kind of blast furnace environmental protection stemming, comprise aggregate, silicon carbide, titanium dioxide, white clay, coke powder and micro mist.Wherein, the mass percent of above-mentioned raw materials is: aggregate 40 ~ 50%, silicon carbide 10 ~ 20%, titanium dioxide 6 ~ 10%, white clay 10 ~ 14%, coke powder 7 ~ 10%, micro mist 5 ~ 9%.
Also comprise bonding agent, bonding agent content is 14 ~ 24% of stemming material total mass.Bonding agent is that T60 contains carbon resin and phenol-formaldehyde resin powder, and T60 is 2:1 ~ 4:1 containing carbon resin and phenol-formaldehyde resin powder mass ratio.The particle diameter of phenol-formaldehyde resin powder is 0.088 ~ 0.1mm.
The particle diameter of aggregate is divided into 1 ~ 3mm and 0 ~ 1mm two kinds, and the mass ratio of the two is 5:4, and the particle diameter of silicon carbide is less than 0.088mm, the particle diameter of titanium dioxide is less than 0.045mm, the particle diameter of white clay is less than 0.088mm, and the particle diameter of coke powder is 0.055 ~ 0.088mm, and the particle diameter of micro mist is 0.055 ~ 0.088mm.
Aggregate is alumine and with rear waste and old slide brick; Silicon carbide is 90SiC and with one or more of rear waste and old iron runner material; Micro mist is waste and old iron runner material after the use of removal of impurities process.
Al in alumine
2o
3mass percentage be greater than 88%, with rear waste and old slide brick after removal of impurities process, Fe
2o
3mass percentage be less than 0.5%; In 90SiC, the mass percentage of SiC is greater than 90%; With rear waste and old iron runner material after removal of impurities process, Fe
2o
3mass percentage be less than 0.5%; TiO in titanium dioxide
2mass percentage be greater than 95%.
Alumine be 1:1 ~ 2:1 with the mass ratio of rear waste and old slide brick.
When silicon carbide be 90SiC and the compound with rear waste and old iron runner material time, the ratio of the two is 1:1 ~ 1:3.
The present invention also provides a kind of preparation method of blast furnace environmental protection stemming, wherein, aggregate, silicon carbide, titanium dioxide, white clay, coke powder and micro mist are carried out proportioning according to respective mass percent, after being dry mixed, rolling, add bonding agent, after wet mixing, rolling, to obtain blast furnace environmental protection stemming.
Embodiment one
The invention provides a kind of blast furnace environmental protection stemming, comprise aggregate, silicon carbide, titanium dioxide, white clay, coke powder and micro mist.Wherein, the mass percent of above-mentioned raw materials is: aggregate 46%, silicon carbide 18%, titanium dioxide 8%, white clay 14%, coke powder 8%, micro mist 6%.
Also comprise bonding agent, bonding agent content is 14% of stemming material total mass.
Wherein, aggregate is alumine and with rear waste and old slide brick; Silicon carbide is 90SiC and with one or more of rear waste and old iron runner material; Micro mist is waste and old iron runner material after the use of removal of impurities process; Bonding agent is that T60 contains carbon resin and phenol-formaldehyde resin powder.
Alumine be 1:1 with the mass ratio of rear waste and old slide brick; Silicon carbide is 90SiC and the compound with rear waste and old iron runner material, and the ratio of the two is 1:1; T60 is 2:1 containing carbon resin and phenol-formaldehyde resin powder mass ratio.
Al in alumine
2o
3mass percentage be greater than 88%, with rear waste and old slide brick after removal of impurities process, Fe
2o
3mass percentage be less than 0.5%; In 90SiC, the mass percentage of SiC is greater than 90%; With rear waste and old iron runner material after removal of impurities process, Fe
2o
3mass percentage be less than 0.5%; TiO in titanium dioxide
2mass percentage be greater than 95%.
The particle diameter of aggregate is divided into 1 ~ 3mm and 0 ~ 1mm two kinds, the mass ratio of the two is 5:4, the particle diameter of silicon carbide is less than 0.088mm, the particle diameter of titanium dioxide is less than 0.045mm, the particle diameter of white clay is less than 0.088mm, the particle diameter of coke powder is 0.055mm, and the particle diameter of micro mist is 0.055mm, the particle diameter of phenol-formaldehyde resin powder be 0.088mm.
The present invention also provides a kind of preparation method of blast furnace environmental protection stemming, comprises the following steps:
S1. after aggregate, silicon carbide, titanium dioxide, white clay, coke powder and micro mist being carried out proportioning according to respective mass percent, put into machine,massing, carry out being dry mixed and the rolling of 9min.
Wherein, alumine is 138kg, is 138kg with rear waste and old slide brick; 90SiC is 54kg, is 54kg with rear waste and old iron runner material; Titanium dioxide is 48kg; White clay is 84kg; Coke powder is 48kg; Be 36kg with rear waste and old iron runner material micro mist.
S2. in machine,massing, bonding agent is added, after rolling through wet mixing and 33min, to obtain blast furnace environmental protection stemming.
Wherein, bonding agent is the phenol-formaldehyde resin powder of T60 containing carbon resin and 28kg of 56kg.
The stemming be prepared from is used in 1780m
3blast furnace in, its performance index are: the volume density of 1000 × 3h, linear change rate, folding strength are respectively 2.12gcm
-3,-0.38%, 2.8MPa; The volume density of 1500 × 3h, linear change rate, folding strength are respectively 2.16gcm
-3,-0.52%, 3.2MPa; The iron mouth degree of depth is 2700 ~ 3000mm, and tapping duration is 100 ~ 120min.
Embodiment two
The invention provides a kind of blast furnace environmental protection stemming, be prepared from by aggregate, silicon carbide, titanium dioxide, white clay, coke powder, micro mist and bonding agent.Wherein, the mass percent of above-mentioned raw materials is: aggregate 50%, silicon carbide 14%, titanium dioxide 8%, white clay 14%, coke powder 9%, micro mist 5%.
Also comprise bonding agent, bonding agent content is 17% of stemming material total mass.
Wherein, aggregate is alumine and with rear waste and old slide brick; Silicon carbide is 90SiC and with one or more of rear waste and old iron runner material; Micro mist is waste and old iron runner material after the use of removal of impurities process; Bonding agent is that T60 contains carbon resin and phenol-formaldehyde resin powder.
Alumine be 2:1 with the mass ratio of rear waste and old slide brick; Silicon carbide is 90SiC and the compound with rear waste and old iron runner material, and the ratio of the two is 1:3; T60 is 2:1 containing carbon resin and phenol-formaldehyde resin powder mass ratio.
Al in alumine
2o
3mass percentage be greater than 88%, with rear waste and old slide brick after removal of impurities process, Fe
2o
3mass percentage be less than 0.5%; In 90SiC, the mass percentage of SiC is greater than 90%; With rear waste and old iron runner material after removal of impurities process, Fe
2o
3mass percentage be less than 0.5%; TiO in titanium dioxide
2mass percentage be greater than 95%.
The particle diameter of aggregate is divided into 1 ~ 3mm and 0 ~ 1mm two kinds, the mass ratio of the two is 5:4, the particle diameter of silicon carbide is less than 0.088mm, the particle diameter of titanium dioxide is less than 0.045mm, the particle diameter of white clay is less than 0.088mm, the particle diameter of coke powder is 0.055mm, and the particle diameter of micro mist is 0.055mm, the particle diameter of phenol-formaldehyde resin powder be 0.088mm.
The present invention also provides a kind of preparation method of blast furnace environmental protection stemming, comprises the following steps:
S1. after aggregate, silicon carbide, titanium dioxide, white clay, coke powder and micro mist being carried out proportioning according to respective mass percent, put into machine,massing, carry out being dry mixed and the rolling of 9min.
Wherein, alumine is 200kg, is 100kg with rear waste and old slide brick; 90SiC is 21kg, is 63kg with rear waste and old iron runner material; Titanium dioxide is 48kg; White clay is 84kg; Coke powder is 54kg; Be 30kg with rear waste and old iron runner material micro mist.
S2. in machine,massing, bonding agent is added, after rolling through wet mixing and 33min, to obtain blast furnace environmental protection stemming.
Wherein, bonding agent is the phenol-formaldehyde resin powder of T60 containing carbon resin and 34kg of 68kg.
The stemming be prepared from is used in 1780m
3blast furnace in, its performance index are: the volume density of 1000 × 3h, linear change rate, folding strength are respectively 2.12gcm
-3,-0.38%, 2.8MPa; The volume density of 1500 × 3h, linear change rate, folding strength are respectively 2.16gcm
-3,-0.52%, 3.2MPa; The iron mouth degree of depth is 2700 ~ 3000mm, and tapping duration is 100 ~ 120min.
Embodiment three
The invention provides a kind of blast furnace environmental protection stemming, be prepared from by aggregate, silicon carbide, titanium dioxide, white clay, coke powder, micro mist and bonding agent.Wherein, the mass percent of above-mentioned raw materials is: aggregate 40%, silicon carbide 20%, titanium dioxide 10%, white clay 14%, coke powder 10%, micro mist 6%.
Also comprise bonding agent, bonding agent content is 19% of stemming material total mass.
Wherein, aggregate is alumine and with rear waste and old slide brick; Silicon carbide is 90SiC; Micro mist is waste and old iron runner material after the use of removal of impurities process; Bonding agent is that T60 contains carbon resin and phenol-formaldehyde resin powder.
Alumine be 1:1 with the mass ratio of rear waste and old slide brick; T60 is 3:1 containing carbon resin and phenol-formaldehyde resin powder mass ratio.
Al in alumine
2o
3mass percentage be greater than 88%, with rear waste and old slide brick after removal of impurities process, Fe
2o
3mass percentage be less than 0.5%; In 90SiC, the mass percentage of SiC is greater than 90%; With rear waste and old iron runner material after removal of impurities process, Fe
2o
3mass percentage be less than 0.5%; TiO in titanium dioxide
2mass percentage be greater than 95%.
The particle diameter of aggregate is divided into 1 ~ 3mm and 0 ~ 1mm two kinds, the mass ratio of the two is 5:4, the particle diameter of silicon carbide is less than 0.088mm, the particle diameter of titanium dioxide is less than 0.045mm, the particle diameter of white clay is less than 0.088mm, the particle diameter of coke powder is 0.055mm, and the particle diameter of micro mist is 0.055mm, the particle diameter of phenol-formaldehyde resin powder be 0.088mm.
The present invention also provides a kind of preparation method of blast furnace environmental protection stemming, comprises the following steps:
S1. after aggregate, silicon carbide, titanium dioxide, white clay, coke powder and micro mist being carried out proportioning according to respective mass percent, put into machine,massing, carry out being dry mixed and the rolling of 10min.
Wherein, alumine is 160kg, is 160kg with rear waste and old slide brick; 90SiC is 160; Titanium dioxide is 80kg; White clay is 112kg; Coke powder is 80kg; Be 48kg with rear waste and old iron runner material micro mist.
S2. in machine,massing, bonding agent is added, after rolling through wet mixing and 38min, to obtain blast furnace environmental protection stemming.
Wherein, bonding agent is the phenol-formaldehyde resin powder of T60 containing carbon resin and 38kg of 114kg.
The stemming be prepared from is used in 2560m
3blast furnace in, its performance index are: the volume density of 1000 × 3h, linear change rate, folding strength are respectively 2.16gcm
-3,-0.30%, 3.2MPa; The volume density of 1500 × 3h, linear change rate, folding strength are respectively 2.19gcm
-3,-0.40%, 3.6MPa; The iron mouth degree of depth is 3200 ~ 3500mm, and tapping duration is 120 ~ 150min.
Embodiment four
The invention provides a kind of blast furnace environmental protection stemming, be prepared from by aggregate, silicon carbide, titanium dioxide, white clay, coke powder, micro mist and bonding agent.Wherein, wherein, the mass percent of above-mentioned raw materials is: aggregate 45%, silicon carbide 20%, titanium dioxide 6%, white clay 14%, coke powder 10%, micro mist 5%.
Also comprise bonding agent, bonding agent content is 24% of stemming material total mass.
Wherein, aggregate is alumine and with rear waste and old slide brick; Silicon carbide is with rear waste and old iron runner material; Micro mist is waste and old iron runner material after the use of removal of impurities process; Bonding agent is that T60 contains carbon resin and phenol-formaldehyde resin powder.
Alumine be 2:1 with the mass ratio of rear waste and old slide brick; T60 is 4:1 containing carbon resin and phenol-formaldehyde resin powder mass ratio.
Al in alumine
2o
3mass percentage be greater than 88%, with rear waste and old slide brick after removal of impurities process, Fe
2o
3mass percentage be less than 0.5%; In 90SiC, the mass percentage of SiC is greater than 90%; With rear waste and old iron runner material after removal of impurities process, Fe
2o
3mass percentage be less than 0.5%; TiO in titanium dioxide
2mass percentage be greater than 95%.
The particle diameter of aggregate is divided into 1 ~ 3mm and 0 ~ 1mm two kinds, the mass ratio of the two is 5:4, the particle diameter of silicon carbide is less than 0.088mm, the particle diameter of titanium dioxide is less than 0.045mm, the particle diameter of white clay is less than 0.088mm, the particle diameter of coke powder is 0.088mm, and the particle diameter of micro mist is 0.088mm, the particle diameter of phenol-formaldehyde resin powder be 0.1mm.
The present invention also provides a kind of preparation method of blast furnace environmental protection stemming, comprises the following steps:
S1. after aggregate, silicon carbide, titanium dioxide, white clay, coke powder and micro mist being carried out proportioning according to respective mass percent, put into machine,massing, carry out being dry mixed and the rolling of 12min.
Wherein, alumine is 210kg, is 105kg with rear waste and old slide brick; Be 140kg with rear waste and old iron runner material; Titanium dioxide is 42kg; White clay is 98kg; Coke powder is 70kg; Be 35kg with rear waste and old iron runner material micro mist.
S2. in machine,massing, bonding agent is added, after rolling through wet mixing and 40min, to obtain blast furnace environmental protection stemming.
Wherein, bonding agent is the phenol-formaldehyde resin powder of T60 containing carbon resin and 33.6kg of 134.4kg.
The stemming be prepared from is used in 1780m
3blast furnace in, its performance index are: the volume density of 1000 × 3h, linear change rate, folding strength are respectively 2.18gcm
-3,-0.24%, 3.4MPa; The volume density of 1500 × 3h, linear change rate, folding strength are respectively 2.22gcm
-3,-0.30%, 3.8MPa; The iron mouth degree of depth is 3000 ~ 3300mm, and tapping duration is 140 ~ 180min.
The foregoing is only preferred embodiment of the present invention, is only illustrative for invention, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes in the spirit and scope that invention claim limits to it, amendment, even equivalence, but all will fall within the scope of protection of the present invention.
Claims (11)
1. a blast furnace environmental protection stemming, is characterized in that, comprises aggregate, silicon carbide, titanium dioxide, white clay, coke powder and micro mist.
2. a kind of blast furnace environmental protection stemming according to claim 1, it is characterized in that, the mass percent of above-mentioned raw materials is: aggregate 40 ~ 50%, silicon carbide 10 ~ 20%, titanium dioxide 6 ~ 10%, white clay 10 ~ 14%, coke powder 7 ~ 10%, micro mist 5 ~ 9%.
3. a kind of blast furnace environmental protection stemming according to claim 2, it is characterized in that, the particle diameter of described aggregate is divided into 1 ~ 3mm and 0 ~ 1mm two kinds, the mass ratio of the two is 5:4, the particle diameter of described silicon carbide is less than 0.088mm, and the particle diameter of described titanium dioxide is less than 0.045mm, and the particle diameter of described white clay is less than 0.088mm, the particle diameter of described coke powder is 0.055 ~ 0.088mm, and the particle diameter of described micro mist is 0.055 ~ 0.088mm.
4. a kind of blast furnace environmental protection stemming according to claim 3, is characterized in that, described aggregate is alumine and with rear waste and old slide brick; Silicon carbide is 90SiC and one or both the mixing with rear waste and old iron runner material; Micro mist is waste and old iron runner material after the use of removal of impurities process.
5. a kind of blast furnace environmental protection stemming according to claim 4, is characterized in that, Al in described alumine
2o
3mass percentage be greater than 88%, described with rear waste and old slide brick after removal of impurities process, Fe
2o
3mass percentage be less than 0.5%;
In described 90SiC, the mass percentage of SiC is greater than 90%;
Described with rear waste and old iron runner material after removal of impurities process, Fe
2o
3mass percentage be less than 0.5%;
TiO in described titanium dioxide
2mass percentage be greater than 95%.
6. a kind of blast furnace environmental protection stemming according to claim 5, is characterized in that, described alumine and the described mass ratio with rear waste and old slide brick are 1:1 ~ 2:1.
7. a kind of blast furnace environmental protection stemming according to claim 4, is characterized in that, described when silicon carbide be 90SiC and the compound with rear waste and old iron runner material time, the ratio of the two is 1:1 ~ 1:3.
8., according to described a kind of blast furnace environmental protection stemming arbitrary in claim 1 to 7, it is characterized in that, also comprise bonding agent, described bonding agent content is 14 ~ 24% of stemming material total mass.
9. a kind of blast furnace environmental protection stemming according to claim 8, is characterized in that, described bonding agent is that T60 contains carbon resin and phenol-formaldehyde resin powder, and described T60 is 2:1 ~ 4:1 containing carbon resin and described phenol-formaldehyde resin powder mass ratio.
10. a kind of blast furnace environmental protection stemming according to claim 9, is characterized in that, the particle diameter of described phenol-formaldehyde resin powder is 0.088 ~ 0.1mm.
The method of a kind of blast furnace environmental protection stemming described in 11. preparations according to Claim 8, it is characterized in that, aggregate, silicon carbide, titanium dioxide, white clay, coke powder and micro mist are carried out proportioning according to respective mass percent, after being dry mixed, rolling, add bonding agent, after wet mixing, rolling, to obtain blast furnace environmental protection stemming.
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| CN108794029A (en) * | 2018-07-17 | 2018-11-13 | 北京瑞普同创科技发展有限公司 | Titaniferous environmental-protection furnace stemming |
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| CN111848144A (en) * | 2020-07-29 | 2020-10-30 | 郑州科信炉料有限公司 | Titanium-containing taphole repairing stemming and preparation method thereof |
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| 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 |
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| CN110128153A (en) * | 2019-05-21 | 2019-08-16 | 山西禄纬堡太钢耐火材料有限公司 | A kind of blast furnace taphole clay containing Titanium and preparation method thereof |
| CN111560487A (en) * | 2020-06-03 | 2020-08-21 | 北京首钢股份有限公司 | Treatment device and method for molten iron splashing of blast furnace taphole channel |
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