CN105237012A - Stemming for taphole of ore hearth and preparation method thereof - Google Patents
Stemming for taphole of ore hearth and preparation method thereof Download PDFInfo
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- CN105237012A CN105237012A CN201510739627.3A CN201510739627A CN105237012A CN 105237012 A CN105237012 A CN 105237012A CN 201510739627 A CN201510739627 A CN 201510739627A CN 105237012 A CN105237012 A CN 105237012A
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Abstract
The invention relates to stemming for a taphole of an ore hearth and a preparation method thereof. The technical scheme adopted by the stemming disclosed by the invention lies in that the preparation method comprises the following steps of: firstly using 40-60wt% of bauxite, 5-15wt% of kyanite, 10-20wt% of brown fused alumina fine powder, 5-15wt% of chromium oxide fine powder, 5-15wt% of silicon carbide fine powder, 5-10wt% of silicon micro powder, 1-5wt% of titanium oxide fine powder, 1-3wt% of cerium oxide fine powder, 1-3wt% of bentonite fine powder and 1-5wt% of Al2O3/Si2N2O/SiC/C composite powder as raw materials, additionally adding an oxide additive accounting for 1-5wt% of the raw materials, and pre-mixing the raw materials and the oxide additive for 5-10 minutes in a mixing and grinding machine so as to obtain premix powder; and then adding a retarder accounting for 0.05-0.25wt% of the raw materials and an aluminum dihydrogen phosphate aqueous solution accounting for 7-15wt% of the raw materials to the premix powder, grinding the premix powder, the retarder and the aluminum dihydrogen phosphate aqueous solution for 20-30 minutes in a wet manner, and then performing stemming extrusion and shaping through a stemming extruder so as to obtain the stemming for the taphole of the ore hearth. The stemming for the taphole of the ore hearth prepared by the preparation method disclosed by the invention has the characteristics of being low in cost, high in intensity, excellent in washing resistance and excellent in corrosion resistance.
Description
Technical field
The invention belongs to iron notch stemming technical field.Be specifically related to a kind of mineral hot furnace iron notch stemming and preparation method thereof.
Background technology
Mineral hot furnace, also known as electric-arc furnace or resistance electric furnace, is utilize the energy of electric arc to carry out smelting metal, mainly produces the iron alloys such as ferrosilicon, ferromanganese, ferrochrome and Rhometal.In smelting process, feed in raw material successively, intermittent type goes out scum, after smelting, is released by molten pig alloy from iron notch.Stemming is a kind of refractory materials being applied to shutoff mineral hot furnace iron notch, and for meeting service requirements, mineral hot furnace iron notch stemming should possess following performance: (1) plasticity-and cohesiveness good, easily get into and fill up iron mouth passage; (2) void content is suitable for, and discharges moisture and gas when being convenient to drying; (3) high volume shrinks little, can avoid cracking; (4) sintering character is good, resistance to erosion and resistant to corrosion; (5) moderate strength, opening is functional, and opening machine drill mouth is easy; (6) environmental pollution is little.
The mineral hot furnace differentiation of stemming technology basic source in Anhydrous stemming for blast furnace is imitated, but Anhydrous stemming for blast furnace price is higher, and blast furnace differs comparatively large with the Working environment of mineral hot furnace, and therefore Anhydrous stemming for blast furnace is not suitable for directly using in mineral hot furnace.Although the domestic and international formula to mineral hot furnace stemming and performance have carried out a certain amount of research work, stemming has not arrived desirable result of use in mineral hot furnace up to now.Current mineral hot furnace stemming ubiquity intensity is low, resistance to erosion and corrosion-resistant property difference etc. problem.Iron notch due to mineral hot furnace is all wanted repeated multiple times and be opened and filling every day, if there are the problems referred to above in stemming quality, red-hot molten iron and slag liquid can produce iron notch stemming and wash away and erosion action, in use procedure, iron notch just there will be reaming, cause iron mouth to shoal, flowing molten iron is unstable, goes out unclean iron, have a strong impact on normal production, and finally affect the work-ing life of mineral hot furnace and smelt output.
Summary of the invention
The present invention is intended to overcome prior art defect, object be to provide a kind of with low cost, intensity is higher, resistance to erosion and the excellent mineral hot furnace iron notch stemming of corrosion-resistant property and preparation method thereof.
For achieving the above object, the technical solution used in the present invention is: first with the Al of the wilkinite fine powder of the cerium oxide fine powder of the titanium oxide fine powder of the silicon powder of the carbide fine powder of the chromic oxide fine powder of the Brown Alundum fine powder of the kyanite of the alumina of 40 ~ 60wt%, 5 ~ 15wt%, 10 ~ 20wt%, 5 ~ 15wt%, 5 ~ 15wt%, 5 ~ 10wt%, 1 ~ 5wt%, 1 ~ 3wt%, 1 ~ 3wt% and 1 ~ 5wt%
2o
3/ Si
2n
2o/SiC/C composite granule is raw material, the oxide addition of additional described raw material 1 ~ 5wt%, and in mixing pan, pre-mixing 5 ~ 10 minutes, obtains premixing flour; In premixing flour, add the retardant of described raw material 0.05 ~ 0.25wt% and the aluminium dihydrogen phosphate aqueous solution of described raw material 7 ~ 15wt% again, wet stone roller 20 ~ 30 minutes, then squeezes mud through mud extruder shaping, obtains mineral hot furnace iron notch stemming.
The grain composition of described alumina is: particle diameter is that 3 ~ 1mm accounts for described alumina 50 ~ 60wt%; Particle diameter is less than 1mm and is more than or equal to 0.5mm and accounts for described alumina 15 ~ 30wt%; Particle diameter is less than 0.5mm and is more than or equal to 0.1mm and accounts for described alumina 15 ~ 30wt%.
The grain composition of described kyanite is: particle diameter is that 2 ~ 1mm accounts for described kyanite 15 ~ 30wt%, and particle diameter is less than 1mm and is more than or equal to 0.5mm and accounts for described kyanite 50 ~ 60wt%, and particle diameter is less than 0.5mm and is more than or equal to 0.1mm and accounts for described kyanite 15 ~ 30wt%.
Described Al
2o
3/ Si
2n
2the preparation method of O/SiC/C composite granule is: by alumina fine powder and coke fines in mass ratio 5:1 mix, obtain compound, in described compound, add the resol of 10wt%, obtain spheroidal particle with tablets press; Loaded in saggar by obtained spheroidal particle, then insert in electric furnace by described saggar, maintain nitrogen atmosphere in stove, atmosphere pressures is 0.01 ~ 0.03MPa, and temperature is 1400 ~ 1600 DEG C, and insulation 2 ~ 5h, naturally cools to room temperature; Fragmentation, is finely ground to granularity and is less than 0.075mm, obtain Al
2o
3/ Si
2n
2o/SiC/C composite granule.
Described oxide addition is one or both in NiO fine powder and ZnO fine powder.
Described retardant is more than one in tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and citric acid.
The density of described aluminium dihydrogen phosphate aqueous solution is 1.45 ~ 1.55g/cm
3.
Owing to adopting technique scheme, the present invention compared with prior art has following positively effect:
The main raw material of mineral hot furnace iron notch stemming (hereinafter referred to as stemming) prepared by the present invention is alumina, raw material comparatively horn of plenty and cheap, therefore low production cost.The retardant that the present invention adopts has good humidity-holding effect, and stemming use properties and processing property in long-term storage process are not declined.Adopt phosphate dihydrogen aluminum solution to make bonding agent, silicon powder and water effect, impart the early strength that stemming is higher in addition.Under hot conditions, can there is solid solution reaction in chromic oxide fine powder and Brown Alundum fine powder, kyanite can be converted into mullite and quartzy phase, and silicon powder and Brown Alundum fine powder also can react generation mullite, effective promotion solid state reaction and sintering process, make prepared stemming have higher intensity.
The generation of the mullite in the present invention is with certain volumetric expansion, and under avoiding high temperature, stemming produces large volumetric shrinkage and crackle.The Al added in stemming
2o
3/ Si
2n
2o/SiC/C composite granule and carbide fine powder have excellent wear resistance, oxide addition meeting and Al
2o
3the erosion resistant Spinel of reaction in-situ preparation, and at high temperature titanium oxide can form erosion resistant TiC or Ti (C, N) with the reducing atmosphere effect original position of material internal, therefore the stemming of preparation has excellent resistance to erosion and corrosion-resistant property.The physicochemical property of the mineral hot furnace iron notch stemming prepared by the present invention is: 200 DEG C × 24h volume density, 2.85 ~ 2.95g/cm
3, 1400 DEG C × 4h volume density, 2.80 ~ 2.90g/cm
3; 200 DEG C × 24h folding strength, 12 ~ 18Mpa, 1400 DEG C × 4h folding strength, 14 ~ 20Mpa; Be highly resistant to molten iron and stemming washed away and corrode 12 ~ 18 hours.
Also cerium oxide is added in stemming prepared by the present invention, at high temperature viscosity is higher for it, easily forms the high electrodeposition substance of fusing point at Tie Kouchu, in use can carry out self-regeneration to the large iron mouth of change, thus the maintenance achieved iron notch, effectively improve the life-span of mineral hot furnace.
Therefore, the mineral hot furnace iron notch stemming prepared by the present invention have with low cost, intensity is higher, resistance to erosion and the excellent feature of corrosion-resistant property.
Embodiment
Below in conjunction with embodiment, the invention will be further described, the restriction not to its protection domain:
For avoiding repetition, first by as follows for the raw material technical parameter Unify legislation involved by this embodiment, repeat no more in specific embodiment:
The grain composition of described alumina is: particle diameter is that 3 ~ 1mm accounts for described alumina 50 ~ 60wt%; Particle diameter is less than 1mm and is more than or equal to 0.5mm and accounts for described alumina 15 ~ 30wt%; Particle diameter is less than 0.5mm and is more than or equal to 0.1mm and accounts for described alumina 15 ~ 30wt%.
The grain composition of described kyanite is: particle diameter is that 2 ~ 1mm accounts for described kyanite 15 ~ 30wt%, and particle diameter is less than 1mm and is more than or equal to 0.5mm and accounts for described kyanite 50 ~ 60wt%, and particle diameter is less than 0.5mm and is more than or equal to 0.1mm and accounts for described kyanite 15 ~ 30wt%.
Described Al
2o
3/ Si
2n
2the preparation method of O/SiC/C composite granule is: by alumina fine powder and coke fines in mass ratio 5:1 mix, obtain compound, in described compound, add the resol of 10wt%, obtain spheroidal particle with tablets press; Loaded in saggar by obtained spheroidal particle, then insert in electric furnace by described saggar, maintain nitrogen atmosphere in stove, atmosphere pressures is 0.01 ~ 0.03MPa, and temperature is 1400 ~ 1600 DEG C, and insulation 2 ~ 5h, naturally cools to room temperature; Fragmentation, is finely ground to granularity and is less than 0.075mm, obtain Al
2o
3/ Si
2n
2o/SiC/C composite granule.
The density of described aluminium dihydrogen phosphate aqueous solution is 1.45 ~ 1.55g/cm
3.
embodiment 1
A kind of mineral hot furnace iron notch stemming and preparation method thereof.First with the Al of the wilkinite fine powder of the cerium oxide fine powder of the titanium oxide fine powder of the silicon powder of the carbide fine powder of the chromic oxide fine powder of the Brown Alundum fine powder of the kyanite of the alumina of 40 ~ 45wt%, 12 ~ 15wt%, 10 ~ 15wt%, 12 ~ 15wt%, 5 ~ 8wt%, 7 ~ 10wt%, 1 ~ 3wt%, 1 ~ 3wt%, 1 ~ 3wt% and 1 ~ 3wt%
2o
3/ Si
2n
2o/SiC/C composite granule is raw material, the oxide addition of additional described raw material 1 ~ 3wt%, and in mixing pan, pre-mixing 5 ~ 7 minutes, obtains premixing flour; In premixing flour, add the retardant of described raw material 0.05 ~ 0.10wt% and the aluminium dihydrogen phosphate aqueous solution of described raw material 7 ~ 9wt% again, wet stone roller 20 ~ 25 minutes, then squeezes mud through mud extruder shaping, obtains mineral hot furnace iron notch stemming.
In the present embodiment 1: described oxide addition is NiO fine powder; Described retardant is tripoly phosphate sodium STPP.
The physicochemical property of the mineral hot furnace iron notch stemming obtained by the present embodiment 1 is: 200 DEG C × 24h volume density, 2.85 ~ 2.87g/cm
3, 1400 DEG C × 4h volume density, 2.80 ~ 2.82g/cm
3; 200 DEG C × 24h folding strength, 12 ~ 14Mpa, 1400 DEG C × 4h folding strength, 14 ~ 16Mpa; Be highly resistant to molten iron and stemming washed away and corrode 12 ~ 14 hours.
embodiment 2
A kind of mineral hot furnace iron notch stemming and preparation method thereof.First with the Al of the wilkinite fine powder of the cerium oxide fine powder of the titanium oxide fine powder of the silicon powder of the carbide fine powder of the chromic oxide fine powder of the Brown Alundum fine powder of the kyanite of the alumina of 42 ~ 47wt%, 10 ~ 13wt%, 12 ~ 17wt%, 10 ~ 13wt%, 7 ~ 10wt%, 5 ~ 8wt%, 3 ~ 5wt%, 1 ~ 3wt%, 1 ~ 3wt% and 3 ~ 5wt%
2o
3/ Si
2n
2o/SiC/C composite granule is raw material, the oxide addition of additional described raw material 3 ~ 5wt%, and in mixing pan, pre-mixing 6 ~ 8 minutes, obtains premixing flour; In premixing flour, add the retardant of described raw material 0.09 ~ 0.14wt% and the aluminium dihydrogen phosphate aqueous solution of described raw material 8 ~ 10wt% again, wet stone roller 22 ~ 27 minutes, then squeezes mud through mud extruder shaping, obtains mineral hot furnace iron notch stemming.
In the present embodiment 2: described oxide addition is NiO fine powder; Described retardant is Sodium hexametaphosphate 99.
The physicochemical property of the mineral hot furnace iron notch stemming obtained by the present embodiment 2 is: 200 DEG C × 24h volume density, 2.87 ~ 2.89g/cm
3, 1400 DEG C × 4h volume density, 2.82 ~ 2.84g/cm
3; 200 DEG C × 24h folding strength, 13 ~ 15Mpa, 1400 DEG C × 4h folding strength, 15 ~ 17Mpa; Be highly resistant to molten iron and stemming washed away and corrode 13 ~ 15 hours.
embodiment 3
A kind of mineral hot furnace iron notch stemming and preparation method thereof.First with the Al of the wilkinite fine powder of the cerium oxide fine powder of the titanium oxide fine powder of the silicon powder of the carbide fine powder of the chromic oxide fine powder of the Brown Alundum fine powder of the kyanite of the alumina of 44 ~ 49wt%, 8 ~ 11wt%, 14 ~ 19wt%, 8 ~ 11wt%, 9 ~ 12wt%, 6 ~ 9wt%, 1 ~ 3wt%, 1 ~ 3wt%, 1 ~ 3wt% and 1 ~ 3wt%
2o
3/ Si
2n
2o/SiC/C composite granule is raw material, the oxide addition of additional described raw material 1 ~ 3wt%, and in mixing pan, pre-mixing 7 ~ 9 minutes, obtains premixing flour; In premixing flour, add the retardant of described raw material 0.13 ~ 0.18wt% and the aluminium dihydrogen phosphate aqueous solution of described raw material 9 ~ 11wt% again, wet stone roller 24 ~ 29 minutes, then squeezes mud through mud extruder shaping, obtains mineral hot furnace iron notch stemming.
In the present embodiment 3: described oxide addition is ZnO fine powder; Described retardant is citric acid.
The physicochemical property of the mineral hot furnace iron notch stemming obtained by the present embodiment 3 is: 200 DEG C × 24h volume density, 2.89 ~ 2.91g/cm
3, 1400 DEG C × 4h volume density, 2.84 ~ 2.86g/cm
3; 200 DEG C × 24h folding strength, 14 ~ 16Mpa, 1400 DEG C × 4h folding strength, 16 ~ 18Mpa; Be highly resistant to molten iron and stemming washed away and corrode 14 ~ 16 hours.
embodiment 4
A kind of mineral hot furnace iron notch stemming and preparation method thereof.First with the Al of the wilkinite fine powder of the cerium oxide fine powder of the titanium oxide fine powder of the silicon powder of the carbide fine powder of the chromic oxide fine powder of the Brown Alundum fine powder of the kyanite of the alumina of 46 ~ 51wt%, 6 ~ 9wt%, 15 ~ 20wt%, 6 ~ 9wt%, 11 ~ 14wt%, 5 ~ 8wt%, 1 ~ 3wt%, 1 ~ 3wt%, 1 ~ 3wt% and 1 ~ 3wt%
2o
3/ Si
2n
2o/SiC/C composite granule is raw material, the oxide addition of additional described raw material 3 ~ 5wt%, and in mixing pan, pre-mixing 8 ~ 10 minutes, obtains premixing flour; In premixing flour, add the retardant of described raw material 0.17 ~ 0.22wt% and the aluminium dihydrogen phosphate aqueous solution of described raw material 10 ~ 12wt% again, wet stone roller 25 ~ 30 minutes, then squeezes mud through mud extruder shaping, obtains mineral hot furnace iron notch stemming.
In the present embodiment 4: described oxide addition is ZnO fine powder; Described retardant is the mixture of tripoly phosphate sodium STPP and Sodium hexametaphosphate 99.
The physicochemical property of the mineral hot furnace iron notch stemming obtained by the present embodiment 4 is: 200 DEG C × 24h volume density, 2.91 ~ 2.93g/cm
3, 1400 DEG C × 4h volume density, 2.86 ~ 2.88g/cm
3; 200 DEG C × 24h folding strength, 15 ~ 17Mpa, 1400 DEG C × 4h folding strength, 17 ~ 19Mpa; Be highly resistant to molten iron and stemming washed away and corrode 15 ~ 17 hours.
embodiment 5
A kind of mineral hot furnace iron notch stemming and preparation method thereof.First with the Al of the wilkinite fine powder of the cerium oxide fine powder of the titanium oxide fine powder of the silicon powder of the carbide fine powder of the chromic oxide fine powder of the Brown Alundum fine powder of the kyanite of the alumina of 50 ~ 55wt%, 5 ~ 8wt%, 10 ~ 15wt%, 5 ~ 8wt%, 12 ~ 15wt%, 5 ~ 8wt%, 1 ~ 3wt%, 1 ~ 3wt%, 1 ~ 3wt% and 2 ~ 4wt%
2o
3/ Si
2n
2o/SiC/C composite granule is raw material, the oxide addition of additional described raw material 1 ~ 3wt%, and in mixing pan, pre-mixing 7 ~ 9 minutes, obtains premixing flour; In premixing flour, add the retardant of described raw material 0.19 ~ 0.24wt% and the aluminium dihydrogen phosphate aqueous solution of described raw material 11 ~ 13wt% again, wet stone roller 23 ~ 28 minutes, then squeezes mud through mud extruder shaping, obtains mineral hot furnace iron notch stemming.
In the present embodiment 5: described oxide addition is NiO fine powder; Described retardant is the mixture of Sodium hexametaphosphate 99 and citric acid.
The physicochemical property of the mineral hot furnace iron notch stemming obtained by the present embodiment 5 is: 200 DEG C × 24h volume density, 2.93 ~ 2.95g/cm
3, 1400 DEG C × 4h volume density, 2.88 ~ 2.90g/cm
3; 200 DEG C × 24h folding strength, 16 ~ 18Mpa, 1400 DEG C × 4h folding strength, 18 ~ 20Mpa; Be highly resistant to molten iron and stemming washed away and corrode 16 ~ 18 hours.
embodiment 6
A kind of mineral hot furnace iron notch stemming and preparation method thereof.First with the Al of the wilkinite fine powder of the cerium oxide fine powder of the titanium oxide fine powder of the silicon powder of the carbide fine powder of the chromic oxide fine powder of the Brown Alundum fine powder of the kyanite of the alumina of 52 ~ 57wt%, 5 ~ 8wt%, 10 ~ 15wt%, 5 ~ 8wt%, 5 ~ 8wt%, 7 ~ 10wt%, 3 ~ 5wt%, 1 ~ 3wt%, 1 ~ 3wt% and 1 ~ 3wt%
2o
3/ Si
2n
2o/SiC/C composite granule is raw material, the oxide addition of additional described raw material 2 ~ 4wt%, and in mixing pan, pre-mixing 8 ~ 10 minutes, obtains premixing flour; In premixing flour, add the retardant of described raw material 0.20 ~ 0.25wt% and the aluminium dihydrogen phosphate aqueous solution of described raw material 13 ~ 15wt% again, wet stone roller 25 ~ 30 minutes, then squeezes mud through mud extruder shaping, obtains mineral hot furnace iron notch stemming.
In the present embodiment 6: described oxide addition is NiO fine powder; Described retardant is the mixture of tripoly phosphate sodium STPP and citric acid.
The physicochemical property of the mineral hot furnace iron notch stemming obtained by the present embodiment 6 is: 200 DEG C × 24h volume density, 2.90 ~ 2.92g/cm
3, 1400 DEG C × 4h volume density, 2.85 ~ 2.87g/cm
3; 200 DEG C × 24h folding strength, 14 ~ 16Mpa, 1400 DEG C × 4h folding strength, 16 ~ 18Mpa; Be highly resistant to molten iron and stemming washed away and corrode 14 ~ 16 hours.
embodiment 7
A kind of mineral hot furnace iron notch stemming and preparation method thereof.First with the Al of the wilkinite fine powder of the cerium oxide fine powder of the titanium oxide fine powder of the silicon powder of the carbide fine powder of the chromic oxide fine powder of the Brown Alundum fine powder of the kyanite of the alumina of 55 ~ 60wt%, 6 ~ 9wt%, 12 ~ 17wt%, 6 ~ 9wt%, 5 ~ 8wt%, 5 ~ 8wt%, 1 ~ 3wt%, 1 ~ 3wt%, 1 ~ 3wt% and 1 ~ 3wt%
2o
3/ Si
2n
2o/SiC/C composite granule is raw material, the oxide addition of additional described raw material 1 ~ 3wt%, and in mixing pan, pre-mixing 5 ~ 7 minutes, obtains premixing flour; In premixing flour, add the retardant of described raw material 0.12 ~ 0.17wt% and the aluminium dihydrogen phosphate aqueous solution of described raw material 9 ~ 11wt% again, wet stone roller 21 ~ 26 minutes, then squeezes mud through mud extruder shaping, obtains mineral hot furnace iron notch stemming.
In the present embodiment 7: described oxide addition is ZnO fine powder; Described retardant is the mixture of tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and citric acid.
The physicochemical property of the mineral hot furnace iron notch stemming obtained by the present embodiment 7 is: 200 DEG C × 24h volume density, 2.92 ~ 2.94g/cm
3, 1400 DEG C × 4h volume density, 2.87 ~ 2.89g/cm
3; 200 DEG C × 24h folding strength, 15 ~ 17Mpa, 1400 DEG C × 4h folding strength, 17 ~ 19Mpa; Be highly resistant to molten iron and stemming washed away and corrode 15 ~ 17 hours.
embodiment 8
A kind of mineral hot furnace iron notch stemming and preparation method thereof.First with the Al of the wilkinite fine powder of the cerium oxide fine powder of the titanium oxide fine powder of the silicon powder of the carbide fine powder of the chromic oxide fine powder of the Brown Alundum fine powder of the kyanite of the alumina of 48 ~ 53wt%, 6 ~ 9wt%, 10 ~ 15wt%, 6 ~ 9wt%, 7 ~ 10wt%, 5 ~ 8wt%, 3 ~ 5wt%, 1 ~ 3wt%, 1 ~ 3wt% and 2 ~ 4wt%
2o
3/ Si
2n
2o/SiC/C composite granule is raw material, the oxide addition of additional described raw material 2 ~ 4wt%, and in mixing pan, pre-mixing 8 ~ 10 minutes, obtains premixing flour; In premixing flour, add the retardant of described raw material 0.19 ~ 0.24wt% and the aluminium dihydrogen phosphate aqueous solution of described raw material 8 ~ 10wt% again, wet stone roller 25 ~ 30 minutes, then squeezes mud through mud extruder shaping, obtains mineral hot furnace iron notch stemming.
In the present embodiment 8: described oxide addition is ZnO fine powder; Described retardant is the mixture of tripoly phosphate sodium STPP and Sodium hexametaphosphate 99.
The physicochemical property of the mineral hot furnace iron notch stemming obtained by the present embodiment 8 is: 200 DEG C × 24h volume density, 2.88 ~ 2.90g/cm
3, 1400 DEG C × 4h volume density, 2.83 ~ 2.85g/cm
3; 200 DEG C × 24h folding strength, 14 ~ 16Mpa, 1400 DEG C × 4h folding strength, 16 ~ 18Mpa; Be highly resistant to molten iron and stemming washed away and corrode 14 ~ 16 hours.
embodiment 9
A kind of mineral hot furnace iron notch stemming and preparation method thereof.First with the Al of the wilkinite fine powder of the cerium oxide fine powder of the titanium oxide fine powder of the silicon powder of the carbide fine powder of the chromic oxide fine powder of the Brown Alundum fine powder of the kyanite of the alumina of 53 ~ 58wt%, 5 ~ 8wt%, 10 ~ 15wt%, 5 ~ 8wt%, 6 ~ 9wt%, 6 ~ 9wt%, 1 ~ 3wt%, 1 ~ 3wt%, 1 ~ 3wt% and 1 ~ 3wt%
2o
3/ Si
2n
2o/SiC/C composite granule is raw material, the oxide addition of additional described raw material 3 ~ 5wt%, and in mixing pan, pre-mixing 6 ~ 8 minutes, obtains premixing flour; In premixing flour, add the retardant of described raw material 0.09 ~ 0.14wt% and the aluminium dihydrogen phosphate aqueous solution of described raw material 12 ~ 14wt% again, wet stone roller 22 ~ 27 minutes, then squeezes mud through mud extruder shaping, obtains mineral hot furnace iron notch stemming.
In the present embodiment 9: described oxide addition is the mixture of NiO fine powder and ZnO fine powder; Described retardant is the mixture of tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and citric acid.
The physicochemical property of the mineral hot furnace iron notch stemming obtained by the present embodiment 9 is: 200 DEG C × 24h volume density, 2.86 ~ 2.88g/cm
3, 1400 DEG C × 4h volume density, 2.81 ~ 2.83g/cm
3; 200 DEG C × 24h folding strength, 13 ~ 15Mpa, 1400 DEG C × 4h folding strength, 15 ~ 17Mpa; Be highly resistant to molten iron and stemming washed away and corrode 13 ~ 15 hours.
This embodiment compared with prior art has following positively effect:
The main raw material of mineral hot furnace iron notch stemming (hereinafter referred to as stemming) prepared by this embodiment is alumina, raw material comparatively horn of plenty and cheap, therefore low production cost.The retardant that this embodiment adopts has good humidity-holding effect, and stemming use properties and processing property in long-term storage process are not declined.Adopt phosphate dihydrogen aluminum solution to make bonding agent, silicon powder and water effect, impart the early strength that stemming is higher in addition.Under hot conditions, can there is solid solution reaction in chromic oxide fine powder and Brown Alundum fine powder, kyanite can be converted into mullite and quartzy phase, and silicon powder and Brown Alundum fine powder also can react generation mullite, effective promotion solid state reaction and sintering process, make prepared stemming have higher intensity.
The generation of the mullite in this embodiment is with certain volumetric expansion, and under avoiding high temperature, this stemming produces large volumetric shrinkage and crackle.The Al added in stemming
2o
3/ Si
2n
2o/SiC/C composite granule and carbide fine powder have excellent wear resistance, oxide addition meeting and Al
2o
3the erosion resistant Spinel of reaction in-situ preparation, and at high temperature titanium oxide can form erosion resistant TiC or Ti (C, N) with the reducing atmosphere effect original position of material internal, therefore the stemming of preparation has excellent resistance to erosion and corrosion-resistant property.The physicochemical property of the mineral hot furnace iron notch stemming prepared by this embodiment is: 200 DEG C × 24h volume density, 2.85 ~ 2.95g/cm
3, 1400 DEG C × 4h volume density, 2.80 ~ 2.90g/cm
3; 200 DEG C × 24h folding strength, 12 ~ 18Mpa, 1400 DEG C × 4h folding strength, 14 ~ 20Mpa; Be highly resistant to molten iron and stemming washed away and corrode 12 ~ 18 hours.
Also cerium oxide is added in stemming prepared by this embodiment, at high temperature viscosity is higher for it, the high electrodeposition substance of easy formation fusing point is at Tie Kouchu, in use self-regeneration can be carried out to the large iron mouth of change, thus the maintenance achieved iron notch, effectively improve the life-span of mineral hot furnace.
Therefore, the mineral hot furnace iron notch stemming prepared by this embodiment have with low cost, intensity is higher, resistance to erosion and the excellent feature of corrosion-resistant property.
Claims (8)
1. a preparation method for mineral hot furnace iron notch stemming, is characterized in that: first with the Al of the wilkinite fine powder of the cerium oxide fine powder of the titanium oxide fine powder of the silicon powder of the carbide fine powder of the chromic oxide fine powder of the Brown Alundum fine powder of the kyanite of the alumina of 40 ~ 60wt%, 5 ~ 15wt%, 10 ~ 20wt%, 5 ~ 15wt%, 5 ~ 15wt%, 5 ~ 10wt%, 1 ~ 5wt%, 1 ~ 3wt%, 1 ~ 3wt% and 1 ~ 5wt%
2o
3/ Si
2n
2o/SiC/C composite granule is raw material, the oxide addition of additional described raw material 1 ~ 5wt%, and in mixing pan, pre-mixing 5 ~ 10 minutes, obtains premixing flour; In premixing flour, add the retardant of described raw material 0.05 ~ 0.25wt% and the aluminium dihydrogen phosphate aqueous solution of described raw material 7 ~ 15wt% again, wet stone roller 20 ~ 30 minutes, then squeezes mud through mud extruder shaping, obtains mineral hot furnace iron notch stemming.
2. the preparation method of mineral hot furnace iron notch stemming according to claim 1, is characterized in that the grain composition of described alumina is: particle diameter is that 3 ~ 1mm accounts for described alumina 50 ~ 60wt%; Particle diameter is less than 1mm and is more than or equal to 0.5mm and accounts for described alumina 15 ~ 30wt%; Particle diameter is less than 0.5mm and is more than or equal to 0.1mm and accounts for described alumina 15 ~ 30wt%.
3. the preparation method of mineral hot furnace iron notch stemming according to claim 1, it is characterized in that the grain composition of described kyanite is: particle diameter is that 2 ~ 1mm accounts for described kyanite 15 ~ 30wt%, particle diameter is less than 1mm and is more than or equal to 0.5mm and accounts for described kyanite 50 ~ 60wt%, and particle diameter is less than 0.5mm and is more than or equal to 0.1mm and accounts for described kyanite 15 ~ 30wt%.
4. the preparation method of mineral hot furnace iron notch stemming according to claim 1, is characterized in that described Al
2o
3/ Si
2n
2the preparation method of O/SiC/C composite granule is: by alumina fine powder and coke fines in mass ratio 5:1 mix, obtain compound, in described compound, add the resol of 10wt%, obtain spheroidal particle with tablets press; Loaded in saggar by obtained spheroidal particle, then insert in electric furnace by described saggar, maintain nitrogen atmosphere in stove, atmosphere pressures is 0.01 ~ 0.03MPa, and temperature is 1400 ~ 1600 DEG C, and insulation 2 ~ 5h, naturally cools to room temperature; Fragmentation, is finely ground to granularity and is less than 0.075mm, obtain Al
2o
3/ Si
2n
2o/SiC/C composite granule.
5. the preparation method of mineral hot furnace iron notch stemming according to claim 1, is characterized in that described oxide addition is one or both in NiO fine powder and ZnO fine powder.
6. the preparation method of mineral hot furnace iron notch stemming according to claim 1, is characterized in that described retardant is more than one in tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and citric acid.
7. the preparation method of mineral hot furnace iron notch stemming according to claim 1, is characterized in that the density of described aluminium dihydrogen phosphate aqueous solution is 1.45 ~ 1.55g/cm
3.
8. a mineral hot furnace iron notch stemming, is characterized in that described mineral hot furnace iron notch stemming is the mineral hot furnace iron notch stemming prepared by preparation method of the mineral hot furnace iron notch stemming according to any one of claim 1 ~ 7.
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| CN106699206A (en) * | 2016-12-26 | 2017-05-24 | 中国京冶工程技术有限公司 | Anhydrous stemming for large and medium sized blast furnace and preparation method of anhydrous stemming |
| CN106927799A (en) * | 2017-04-06 | 2017-07-07 | 江苏江能新材料科技有限公司 | A kind of special chromium mud of mineral hot furnace and preparation method |
| CN107032768A (en) * | 2017-04-28 | 2017-08-11 | 巩义市鑫伟炉料厂 | A kind of mineral hot furnace iron mouthful environment-friendly type green mud and preparation method thereof |
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| CN107032768B (en) * | 2017-04-28 | 2020-09-29 | 巩义市鑫伟炉料厂 | Environment-friendly green mud for submerged arc furnace taphole and preparation method thereof |
| CN107032768A (en) * | 2017-04-28 | 2017-08-11 | 巩义市鑫伟炉料厂 | A kind of mineral hot furnace iron mouthful environment-friendly type green mud and preparation method thereof |
| JP7219605B2 (en) | 2018-03-22 | 2023-02-08 | 黒崎播磨株式会社 | mud material |
| JP2019167287A (en) * | 2018-03-22 | 2019-10-03 | 黒崎播磨株式会社 | Mud material |
| 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 |
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| JP7197610B2 (en) | 2019-01-30 | 2022-12-27 | 京セラ株式会社 | ceramic member |
| JPWO2020158806A1 (en) * | 2019-01-30 | 2021-11-25 | 京セラ株式会社 | Heat resistant material |
| CN109970459A (en) * | 2019-03-26 | 2019-07-05 | 宜兴市丁山耐火器材有限公司 | A kind of rod-like mullite high wear-resistant brick and preparation method thereof |
| CN110590345A (en) * | 2019-09-19 | 2019-12-20 | 湖南立达高新材料有限公司 | Repair material for intermediate frequency furnace and preparation method thereof |
| CN111704472A (en) * | 2020-06-22 | 2020-09-25 | 湖南立达高新材料有限公司 | Additive for anhydrous stemming and preparation method thereof |
| CN111807848A (en) * | 2020-07-15 | 2020-10-23 | 江苏江能新材料科技有限公司 | Improved smokeless environment-friendly stemming and manufacturing method thereof |
| CN112374870A (en) * | 2020-11-30 | 2021-02-19 | 商都中建金马冶金化工有限公司 | Environment-friendly anhydrous stemming |
| CN115093238A (en) * | 2022-08-22 | 2022-09-23 | 湖南立达高新材料有限公司 | Refractory castable for tapping channel of submerged arc furnace and preparation method thereof |
| CN116283249A (en) * | 2022-12-22 | 2023-06-23 | 鞍山钢铁冶金炉材科技有限公司 | Ladle nozzle pocket brick thermal state repairing material and preparation and use methods thereof |
| CN116283249B (en) * | 2022-12-22 | 2024-07-26 | 鞍山钢铁冶金炉材科技有限公司 | Ladle nozzle pocket brick thermal state repairing material and preparation and use methods thereof |
| CN117923884A (en) * | 2024-03-20 | 2024-04-26 | 北京利尔高温材料股份有限公司 | Vanadium-titanium stemming for blast furnace iron plugging port |
| CN117923884B (en) * | 2024-03-20 | 2024-06-07 | 北京利尔高温材料股份有限公司 | Vanadium-titanium stemming for blast furnace iron plugging port |
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