CN1712873A - Internal lining casting material of industrial reaction furnace and lining-up method - Google Patents
Internal lining casting material of industrial reaction furnace and lining-up method Download PDFInfo
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- CN1712873A CN1712873A CN 200510042939 CN200510042939A CN1712873A CN 1712873 A CN1712873 A CN 1712873A CN 200510042939 CN200510042939 CN 200510042939 CN 200510042939 A CN200510042939 A CN 200510042939A CN 1712873 A CN1712873 A CN 1712873A
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Abstract
A casting material for the internal working liner of industrial reduction furnace is prepared from aluminium oxide for insulating layer, high-Al material for intermediate layer and the compact corundum, zirconium mullite, chromium oxide, superfine zircon powder, Al2O3 powder and calcium aluminate cement through weighing raw materials except calcium aluminate cement, stirring, loading in bag for future use, casting external insulating layer, casting mediate layer and casting working liner, which includes proportionally mixing said mixture with calcium aluminate cement, adding water, stirring, moulding, vibrating, demoulding, natural curing and baking.
Description
Technical field
The present invention relates to a kind of industrial reaction fire proof material of furnace lining, be specially adapted to the internal layer working lining mould material of oil oven method carbon black furnace and the method for furnace lining lining cutting.
Background technology
Carbon black is one of indispensable important industrial chemicals in the modern people economy.Wherein 90% is used for rubber industry, and all the other are used for other fields such as printing ink, coating, plastics, synthetic leather.Carbon black realizes the mechanization of farm work to the development of national communication transportation, and raising people material and ideological progress has very important meaning.
Oil oven method carbon black is the topmost production method of contemporary carbon black industry, and China's black reactor furnace lining generally adopts three-decker: the innermost layer that high-temperature behavior is good, the intermediate layer that heat-insulating property is good and the skin of lightweight heat-proof.
The innermost layer working lining of black reactor furnace lining directly contacts high temperature gas flow, prior art mainly adopts chrome corundum brick to make the innermost layer working lining, its brick type complexity, puzzle joint is many, anti-airflow scouring ability, and the life-span generally only is 4 months, and when removing, also the outer heat-insulation layer of intermediate layer that will heat-insulating property is good and lightweight heat-proof is also removed simultaneously, makes to remove workload increasing, cost up.
Summary of the invention
It is simple to the purpose of this invention is to provide a kind of construction method, and material property is stable, long service life, and anti-airflow scouring ability is strong and high-temperature behavior is good, can reduce production costs a kind of industrial reaction internal layer working lining mould material of easy construction.
Another object of the present invention provides the furnace lining lining cutting method of product.
The technical scheme that realizes the object of the invention is to solve like this: the outer heat-insulation layer material that comprises the lightweight heat-proof of alumina hollow ball, the intermediate layer material that the heat-insulating property of high-strength high-alumina matter is good, outstanding feature of the present invention is at internal layer working lining mould material by mass ratio, also include 75%～85% electric smelting compact alumina, ≤ 5% fused zirconia-mullite, 4%～8% chromium oxide, ≤ 4% zircon superfine powder, 5%～10% aluminium oxide powder, 4%～8% aluminous cement; The grain size distribution mass ratio of said working lining material is: wherein the compact alumina of 5～8mm granularity should account for 10～15% of total mass ratio, 3～5mm granularity compact alumina should account for 10～15% of total mass ratio, 1～3mm granularity compact alumina should account for 15～20% of total mass ratio, 0～1mm granularity compact alumina should account for 25～30% of total mass ratio,＜0.074mm granularity compact alumina should account for 4～7% of total mass ratio, and＜0.088mm granularity fused zirconia-mullite should account for below 5% of total mass ratio;＜0.088mm granularity chromium oxide should account for 3～5% of total mass ratio, D
50≤ μ m granularity zircon superfine powder should account for below 4% of total mass ratio, D
50≤ 5 μ m granularity aluminium oxide powders should account for 5～10% of total mass ratio, and granularity is Bo Shi method specific area 4012 (cm
2/ g) aluminous cement should account for 4～8% of total mass ratio.
A kind of furnace lining lining cutting method that realizes claim 1 product, undertaken by following step:
A, pour in the forced mixer to do by the various raw materials of the accurate weighing of ratio requirement (except the aluminous cement) and mixed 4～8 minutes;
B, discharging are delivered to feed bin through belt, and feed bin is divided into packing machine, mould outer woven bag in packing into, and the 25Kg/ bag is premix, and is stand-by;
C, according to type of furnace requirement, at first pour into a mould the outer heat-insulation layer of the lightweight heat-proof of alumina hollow ball, the good intermediate layer of heat-insulating property of pouring into a mould high-strength high-alumina matter more to be formed, a good template is prepared the cast working lining outside the intermediate layer at last, its each layer cast thickness respectively is heat-insulation layer 100～150mm, intermediate layer 150～200mm, working lining 200～250mm;
When d, working lining cast, pour premix and aluminous cement into forced mixer in proportion, do and mixed 3～5 minutes, added the water wet mixing 4～7 minutes, discharging is poured in the template body then, with inserting vibrator vibration moulding;
E, the demoulding after 24 hours, natural curing 3 days is by coming into operation after the baking of baking system.
The present invention adopts Al
2O
3-Cr
2O
3-ZrO
2-SiO
2The low cement casting material of system is as the work liner, simultaneously in conjunction with the outer heat-insulation layer of the lightweight heat-proof of good intermediate layer of the heat-insulating property of high-strength high-alumina matter and alumina hollow ball, be moulding by casting, easy construction, more former the laying bricks of pour mass air-tightness and heat insulating ability improved greatly, the working lining life-span is prolonged, can reach more than 8 months.And after the stove labour, only need dismounting work liner, intermediate layer and heat-insulation layer can use two to three stove labour, have greatly reduced production cost.
The present invention is main material with the electric smelting compact alumina; The adding zirconium mullite both can improve the corrosion stability of material, can improve the toughness of material again; Add the zircon superfine powder, it is decomposed into ZrO in heating process
2With newborn SiO
2, the latter and alumina powder generate mullite, make the material densification, also improve thermal shock resistance and toughness; The infinitely solid solution of chromium oxide and corundum can limited solid solution with mullite, and formed solid solution is combined closely material.Simultaneously, chromium oxide can absorb the impurity CaO in the black reactor furnace gas, forms the solid solution of fusing point about up to 2300 ℃, makes that to produce amount of liquid phase material at high temperature under few, improves the material at high temperature ability of impurity erosion in the opposing carbon black furnace furnace gas down.
The present invention compared with prior art provides a kind of construction method simple, and material property is stable, long service life, anti-airflow scouring ability is strong and resistance to elevated temperatures is good, can reduce production costs, moulding by casting, a kind of industrial reaction internal layer working lining mould material of easy construction.Above-mentioned mould material can greatly improve anti-the invading property and the resistance to heat shocks of pour mass.Reach 8～10 months service life, intermediate layer and heat-insulation layer can use two to three stove labour, have greatly reduced integrated cost, mainly are applicable to oil oven method carbon black furnace inner lining material, also can be used for other sintering furnaces as internal layer working lining mould material in the stove, society and economic benefit are obvious.
The specific embodiment
Below in conjunction with embodiment content of the present invention is described further
The outer heat-insulation layer material that comprises the lightweight heat-proof of alumina hollow ball, the intermediate layer material that the heat-insulating property of high-strength high-alumina matter is good, internal layer working lining mould material is pressed mass ratio, also include 75%～85% electric smelting compact alumina, ≤ 5% fused zirconia-mullite, 4%～8% chromium oxide ,≤4% zircon superfine powder, 5%～10% aluminium oxide powder, 4%～8% aluminous cement; The grain size distribution mass ratio of said working lining material is: wherein the compact alumina of 5～8mm granularity should account for 10～15% of total mass ratio, 3～5mm granularity compact alumina should account for 10～15% of total mass ratio, 1～3mm granularity compact alumina should account for 15～20% of total mass ratio, 0～1mm granularity compact alumina should account for 25～30% of total mass ratio,＜0.074mm granularity compact alumina should account for 4～7% of total mass ratio, and＜0.088mm granularity fused zirconia-mullite should account for below 5% of total mass ratio;＜0.088mm granularity chromium oxide should account for 3～5% of total mass ratio, D
50≤ 3 μ m granularity zircon superfine powders should account for below 4% of total mass ratio, D
50≤ 5 μ m granularity aluminium oxide powders should account for 5～10% of total mass ratio, and granularity is Bo Shi method specific area 4012 (cm
2/ g) aluminous cement should account for 4～8% of total mass ratio.
To raw-material require as follows:
The title material index
Electric smelting compact alumina Al
2O
3〉=98～99%
Fused zirconia-mullite Al
2O
340～46%, ZrO
234～36%
Chromium oxide Cr
2O
3〉=98～99%
Zircon ZrO
266～68%, SiO
231～33%
Aluminium oxide powder Al
2O
398～99%
Aluminous cement Al
2O
369～71%, CaO 29～31%
Particle size range
Material particle size scope: 0～8mm, wherein the particle diameter of compact alumina is 0.044～8.00mm, the fused zirconia-mullite particle diameter is＜0.088mm that the chromium oxide particle diameter is＜0.088mm that the zircon superfine powder is D
50≤ 3 μ m, aluminium oxide powder are D
50≤ 5 μ m.
Material bulk density Andreassen distribution equation CEFT/100=(D/D
L)
qCalculate, the q value gets 0.23 or 0.25, to reach the maximum bulk density of vibration.
A kind of furnace lining lining cutting method that realizes claim 1 product, undertaken by following step:
A, pour in the forced mixer to do by the various raw materials of the accurate weighing of ratio requirement (except the aluminous cement) and mixed 4～8 minutes;
B, discharging are delivered to feed bin through belt, and feed bin is divided into packing machine, mould outer woven bag in packing into, and the 25Kg/ bag is premix, and is stand-by;
C, according to type of furnace requirement, at first pour into a mould the outer heat-insulation layer of the lightweight heat-proof of alumina hollow ball, the good intermediate layer of heat-insulating property of pouring into a mould high-strength high-alumina matter more to be formed, a good template is prepared the cast working lining outside the intermediate layer at last, its each layer cast thickness respectively is heat-insulation layer 100～150mm, intermediate layer 150～200mm, working lining 200～250mm;
When d, working lining cast, pour premix and aluminous cement into forced mixer in proportion, do and mixed 3～5 minutes, added the water wet mixing 4～7 minutes, discharging is poured in the template body then, with inserting vibrator vibration moulding;
E, the demoulding after 24 hours, natural curing 3 days is by coming into operation after the baking of baking system.
Embodiment 1
The outer heat-insulation layer material that comprises the lightweight heat-proof of alumina hollow ball, the intermediate layer material that the heat-insulating property of high-strength high-alumina matter is good, internal layer working lining mould material is pressed mass ratio, also include electric smelting compact alumina 75%, fused zirconia-mullite 4%, chromium oxide 4%, zircon superfine powder 4%, aluminium oxide powder 9%, aluminous cement 4%.The grain size distribution mass ratio of said working lining mould material is: wherein the compact alumina of compact alumina 5～8mm granularity should account for 12% of total mass ratio, 3～5mm granularity compact alumina should account for 12% of total mass ratio, 1～3mm granularity compact alumina should account for 19% of total mass ratio, 0～1mm granularity compact alumina should account for 25% of total mass ratio, and＜0.074mm granularity compact alumina should account for 7% of total mass ratio; Fused zirconia-mullite＜0.088mm granularity is 4%, and chromium oxide＜0.088mm granularity is 4%, zircon superfine powder D
50≤ 3 μ m granularities are 4%, aluminium oxide powder D
50≤ 5 μ m granularities are 9%, aluminous cement 4%.
Furnace lining lining cutting method, undertaken by following step:
A, pour in the forced mixer to do by the various raw materials of the accurate weighing of ratio requirement (except the aluminous cement) and mixed 5 minutes;
B, discharging are delivered to feed bin through belt, and feed bin is divided into packing machine, mould outer woven bag in packing into, and the 25Kg/ bag is premix, and is stand-by;
C, according to type of furnace requirement, at first pour into a mould the outer heat-insulation layer of the lightweight heat-proof of alumina hollow ball, the good intermediate layer of heat-insulating property of pouring into a mould high-strength high-alumina matter more to be formed, a good template is prepared the cast working lining outside the intermediate layer at last, its each layer cast thickness respectively is heat-insulation layer 100～150mm, intermediate layer 150～200mm, working lining 200～250mm;
When d, working lining cast, pour premix and aluminous cement into forced mixer in proportion, do and mixed 5 minutes, added the water wet mixing 7 minutes, discharging is poured in the template body then, with inserting vibrator vibration moulding;
E, the demoulding after 24 hours, natural curing 3 days is by coming into operation after the baking of baking system.
Embodiment 2
The outer heat-insulation layer material that comprises the lightweight heat-proof of alumina hollow ball, the intermediate layer material that the heat-insulating property of high-strength high-alumina matter is good, internal layer working lining mould material is pressed mass ratio, also include electric smelting compact alumina 77%, fused zirconia-mullite 3%, chromium oxide 4%, zircon superfine powder 3%, aluminium oxide powder 7%, aluminous cement 6%; The grain size distribution mass ratio of said working lining mould material is: wherein the compact alumina of compact alumina 5～8mm granularity should account for 12% of total mass ratio, 3～5mm granularity compact alumina should account for 12% of total mass ratio, 1～3mm granularity compact alumina should account for 20% of total mass ratio, 0～1mm granularity compact alumina should account for 26% of total mass ratio, and＜0.074mm granularity compact alumina should account for 7% of total mass ratio; Fused zirconia-mullite＜0.088mm granularity is 3%, and chromium oxide＜0.088mm granularity is 4%, zircon superfine powder D
50≤ 3 μ m granularities are 3%, aluminium oxide powder D
50≤ 5 μ m granularities are 7%, aluminous cement 6%.
A kind of furnace lining lining cutting method that realizes claim 1 product, undertaken by following step:
A, pour in the forced mixer to do by the various raw materials of the accurate weighing of ratio requirement (except the aluminous cement) and mixed 5 minutes;
B, discharging are delivered to feed bin through belt, and feed bin is divided into packing machine, mould outer woven bag in packing into, and the 25Kg/ bag is premix, and is stand-by;
C, according to type of furnace requirement, at first pour into a mould the outer heat-insulation layer of the lightweight heat-proof of alumina hollow ball, the good intermediate layer of heat-insulating property of pouring into a mould high-strength high-alumina matter more to be formed, outer good template prepared the cast working lining in the intermediate layer at last, its each layer cast thickness respectively is heat-insulation layer 100～150mm, intermediate layer 150～200mm, working lining 200～250mm;
When d, working lining cast, pour premix and aluminous cement into forced mixer in proportion, do and mixed 3 minutes, added the water wet mixing 4 minutes, discharging is poured in the template body then, with inserting vibrator vibration moulding;
E, the demoulding after 24 hours, natural curing 3 days is by coming into operation after the baking of baking system.
Embodiment 3
The outer heat-insulation layer material that comprises the lightweight heat-proof of alumina hollow ball, the intermediate layer material that the heat-insulating property of high-strength high-alumina matter is good, internal layer working lining mould material is pressed mass ratio, also include electric smelting compact alumina 77%, fused zirconia-mullite 5%, chromium oxide 3%, zircon superfine powder 4%, aluminium oxide powder 6%, aluminous cement 5%; The grain size distribution mass ratio of said working lining mould material is: wherein the compact alumina of compact alumina 5～8mm granularity should account for 14% of total mass ratio, 3～5mm granularity compact alumina should account for 14% of total mass ratio, 1～3mm granularity compact alumina should account for 17% of total mass ratio, 0～1mm granularity compact alumina should account for 25% of total mass ratio, and＜0.074mm granularity compact alumina should account for 7% of total mass ratio; Fused zirconia-mullite＜0.088mm granularity is 5%, and chromium oxide＜0.088mm granularity is 3%, zircon superfine powder D
50≤ 3 μ m granularities are 4%, aluminium oxide powder D
50≤ 5 μ m granularities are 6%, aluminous cement 5%.
A kind of furnace lining lining cutting method that realizes claim 1 product, undertaken by following step:
A, pour in the forced mixer to do by the various raw materials of the accurate weighing of ratio requirement (except the aluminous cement) and mixed 5 minutes;
B, discharging are delivered to feed bin through belt, and feed bin is divided into packing machine, mould outer woven bag in packing into, and the 25Kg/ bag is premix, and is stand-by;
C, according to type of furnace requirement, at first pour into a mould the outer heat-insulation layer of the lightweight heat-proof of alumina hollow ball, the good intermediate layer of heat-insulating property of pouring into a mould high-strength high-alumina matter more to be formed, outer good template prepared the cast working lining in the intermediate layer at last, its each layer cast thickness respectively is heat-insulation layer 100～150mm, intermediate layer 150～200mm, working lining 200～250mm;
When d, working lining cast, pour premix and aluminous cement into forced mixer in proportion, do and mixed 4 minutes, added the water wet mixing 5 minutes, discharging is poured in the template body then, with inserting vibrator vibration moulding;
E, the demoulding after 24 hours, natural curing 3 days is by coming into operation after the baking of baking system.
In sum, prior art furnace life weak point when repairing furnace lining, be removed three layers of furnace lining simultaneously, has constantly wasted material, also increases the time of repairing, and causes economic loss.The reacting furnace furnace lining that adopts material of the present invention to make is the globality cast, improved insulation, sealing, for this reason, prolonged reacting furnace furnace life, simultaneously when repairing furnace lining for the first time, only remove the internal layer working lining, only for the second time or when repairing furnace lining for the third time, just middle heat insulation layer and external thermal insulation are also removed, therefore, the marked improvement of this invention just is more than doubled in the furnace life of furnace life than prior art, repair time and material reduce greatly, prior art has increased output relatively, and the performance of enterprises becomes several multiplications long, is the very economical effective furnace lining material of contemporary black reactor.
Claims (2)
1, a kind of industrial reaction internal layer working lining mould material, the outer heat-insulation layer material that comprises the lightweight heat-proof of alumina hollow ball, the intermediate layer material that the heat-insulating property of high-strength high-alumina matter is good, it is characterized in that internal layer working lining mould material by mass ratio, also includes 75%～85% electric smelting compact alumina ,≤5% fused zirconia-mullite, 4%～8% chromium oxide, ≤ 4% zircon superfine powder, 5%～10% aluminium oxide powder, 4%～8% aluminous cement; The grain size distribution mass ratio of said working lining material is: wherein the compact alumina of 5～8mm granularity should account for 10～15% of total mass ratio, 3～5mm granularity compact alumina should account for 10～15% of total mass ratio, 1～3mm granularity compact alumina should account for 15～20% of total mass ratio, 0～1mm granularity compact alumina should account for 25～30% of total mass ratio,＜0.074mm granularity compact alumina should account for 4～7% of total mass ratio, and＜0.088mm granularity fused zirconia-mullite should account for below 5% of total mass ratio;＜0.088mm granularity chromium oxide should account for 3～5% of total mass ratio, D
50≤ 3 μ m granularity zircon superfine powders should account for below 4% of total mass ratio, D
50≤ 5 μ m granularity aluminium oxide powders should account for 5～10% of total mass ratio, and granularity is Bo Shi method specific area 4012 (cm
2/ g) aluminous cement should account for 4～8% of total mass ratio.
2, a kind of furnace lining lining cutting method that realizes claim 1 product, undertaken by following step:
A, pour in the forced mixer to do by the various raw materials of the accurate weighing of ratio requirement (except the aluminous cement) and mixed 4～8 minutes;
B, discharging are delivered to feed bin through belt, and feed bin is divided into packing machine, mould outer woven bag in packing into, and the 25Kg/ bag is premix, and is stand-by;
C, according to type of furnace requirement, at first pour into a mould the outer heat-insulation layer of the lightweight heat-proof of alumina hollow ball, the good intermediate layer of heat-insulating property of pouring into a mould high-strength high-alumina matter more to be formed, a good template is prepared the cast working lining outside the intermediate layer at last, its each layer cast thickness respectively is heat-insulation layer 100～150mm, intermediate layer 150～200mm, working lining 200～250mm;
When d, working lining cast, pour premix and aluminous cement into forced mixer in proportion, do and mixed 3～5 minutes, added the water wet mixing 4～7 minutes, its amount of water is 5～6%, and discharging is poured in the template body then, with inserting vibrator vibration moulding;
E, the demoulding after 24 hours, natural curing 3 days is by coming into operation after the baking of baking system.
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|---|---|---|---|
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|---|---|---|---|
| CNB2005100429395A CN100357692C (en) | 2005-07-14 | 2005-07-14 | Internal lining casting material of industrial reaction furnace and lining-up method |
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| CN100357692C CN100357692C (en) | 2007-12-26 |
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| CN100564307C (en) * | 2007-08-27 | 2009-12-02 | 浙江工业大学 | Gradient composite heat-insulating layer and manufacture method thereof |
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| CN102586619A (en) * | 2012-02-10 | 2012-07-18 | 昆明金水铜冶炼有限公司 | Slag copper comprehensive settling and separating furnace |
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| CN111960831A (en) * | 2020-08-21 | 2020-11-20 | 浙江锦诚新材料股份有限公司 | Spray coating for cement kiln preheater |
| CN112745109A (en) * | 2020-12-30 | 2021-05-04 | 巩义市新科耐火材料有限公司 | Production method of high-temperature anti-stripping chromium corundum brick |
| CN115448709A (en) * | 2022-10-21 | 2022-12-09 | 湖南旗滨医药材料科技有限公司 | Anti-erosion rotating pipe for glass kiln pipe drawing machine and preparation method thereof |
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