CN103787671A - Preparation process of carbon-free steel packing refractory bricks - Google Patents
Preparation process of carbon-free steel packing refractory bricks Download PDFInfo
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- CN103787671A CN103787671A CN201210433730.1A CN201210433730A CN103787671A CN 103787671 A CN103787671 A CN 103787671A CN 201210433730 A CN201210433730 A CN 201210433730A CN 103787671 A CN103787671 A CN 103787671A
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Abstract
The invention discloses a preparation process of carbon-free steel packing refractory bricks, which comprises the following steps: 1) mixing 16-18 parts of 7-10mm white corundum particles, 20-22 parts of 4-7mm white corundum particles and 6-8 parts of 1-4mm white corundum particles in a mixer for 5-8 minutes; 2) mixing 3-5 parts of alpha-Al2O3 of -200 meshes, 6-8 parts of fused aluminum-magnesium spinel powder of -200 meshes, 5-7 parts of magnesium oxide of -200 meshes and 2-4 parts of metal aluminum powder of -200 meshes in a mixer for 10-15 minutes; 3) adding the mixture prepared in the step 1) into the mixer in the step 2), mixing for 10-15 minutes, adding 1.5-2.5 parts of sodium hexametaphosphate, 3-5 parts of 25% magnesium chloride solution and 0.5-1.5 parts of sodium lignin sulfonate, and mixing for 10-15 minutes before discharge; 4) aging for 1-2 hours, performing compression moulding with a press, and drying for 24 hours in a drying kiln at 200 DEG C.
Description
Technical field
The present invention relates to technical field of ferrous metallurgy, relate in particular to a kind of preparation technology of carbon-free steel cylinder-packing refractory brick.
Background technology
Along with the development of external refining and continuous casting technology, ladle is changed into the outer liquid steel refining equipment of stove of function complexity gradually by the splendid attire steel in water container of original function singleness.The molten steel prolongation of the residence time and raising of tapping temperature in ladle make the Working environment of ladle become harsher.For adapting to the change of ladle working environment, domestic ladle has generally adopted Al2O3MgOC Bricks and aluminium riched spinel carbon brick.But it is high to adopt Al2O3MgOC Bricks and aluminium riched spinel carbon brick to make the ladle hot conductivity of liner, and liquid steel temperature declines fast, being unfavorable for that continuous casting is produced carries out smoothly, and on the other hand, carbonaceous article is obvious to molten steel recarburization effect, is not suitable with smelting low carbon steel and Clean Steel.Therefore, in recent years, lining material in the ladle is gradually to Non-carbonized future development.
Ladle liner carbon-free material has pressed machine brick, monolithic castable and pouring precast block etc.Monolithic castable is in the time of construction, and there is strict requirement temperature, amount of water, conservation system, baking regime aspect to external world, also needs corresponding construction machinery as auxiliary facility simultaneously.In order to improve turnover rate and the utilization ratio of ladle, shorten construction, maintenance and shared time of baking, meet the wearing quality to the demand of Clean Steel Smelting and raising lining material in the ladle, increasing user has adopted prefabricated section to build ladle by laying bricks or stones, result of use has met or exceeded on-the-spot integrated poured working lining gradually, has become a new trend of amorphous refractory construction and utilisation technology aspect.
The ultra low-carbon steels such as smelting silicon steel, Bridge Steel, automobile slab must pass through the refining under vacuum condition of VD stove, ladle bottom Argon is stirred simultaneously, by LF stove electric-arc heating, furnace reduction atmosphere, make white slag refining, gas stirring etc., strengthening thermodynamics and kinetics condition, desulfurization, alloying, intensification etc.Therefore slag basicity scope is large, and the temperature of molten steel and slag is higher, and the residence time of molten steel in ladle extends, and thermal shock resistance is strong, and whipping force is large, the damage of internal lining aggravation to ladle.Existing ladle prefabricated section thermal conductivity is relatively still higher, and its heat-shock resistance, scour resistance are still weak, and work-ing life is low, can not meet the requirement that ladle refining is produced completely.
Summary of the invention
The preparation technology who the object of the invention is to propose a kind of carbon-free steel cylinder-packing refractory brick, this refractory brick has good anti-thermal shock, slag corrosion resistance, scour resistance and heat-insulating property, and long service life.
For reaching this object, the present invention by the following technical solutions:
A preparation technology for carbon-free steel cylinder-packing refractory brick, this refractory brick is made up of following component in weight part: 7-10mm white fused alumina particle 16-18 part, 4-7mm white fused alumina particle 20-22 part, 1-4mm white fused alumina particle 6-8 part ,-200 order α-Al
2o
33-5 part ,-200 order electric smelting aluminum-spinel powder 6-8 parts ,-200 order magnesium oxide 5-7 parts,-200 order metallic aluminium powder 2-4 parts, Sodium hexametaphosphate 99 1.5-2.5 part, magnesium chloride solution 3-5 part of concentration 25%, the 0.5-1.5 of wooden sodium sulfonate part, described preparation method comprises the steps:
1) three kinds of white fused alumina particles are put into mixer mixing 5-8 minute, take out for subsequent use;
2) by α-Al
2o
3, electric smelting aluminum-spinel powder, magnesium oxide and metallic aluminium powder put into mixer mixing 10-15 minute;
3) by the 1st) compound prepared of step adds the 2nd) in the mixer of step, remix 10-15 minute, then adds magnesium chloride solution and the wooden sodium sulfonate of Sodium hexametaphosphate 99, concentration 25%, and then mixes 10-15 minute, discharging;
4) ageing mixture 1-2 hour after discharging, then by pressing machine compression moulding, enters 200 ℃ of dry can making for 24 hours of dry kiln.
The present invention has following beneficial effect:
1) the present invention by unique technical recipe and feeding sequence, has successfully solved not antiscour of refractory brick, and the problem that aggregate powder departs from effectively raises the thermal shock resistance of material.Owing to having added spinel in raw material, make refractory brick there is good Tough structure, low-thermal-expansion rate, lower thermal conductivity and preferably anti-saline and alkaline erosional competency.
2) in refractory brick raw material of the present invention, add magnesium chloride solution and the wooden sodium sulfonate of Sodium hexametaphosphate 99, concentration 25%, make anti-thermal shock, slag corrosion resistance, scour resistance and the heat-insulating property excellence of ladle.
3) refractory brick of the present invention has solved molten steel recarburization affects the problem of the Clean Steel quality of production, and production process is easy to realize, and cost is lower, improves more than 50% work-ing life than prior art simultaneously.
Embodiment
Embodiment mono-
A preparation technology for carbon-free steel cylinder-packing refractory brick, this refractory brick is made up of following component in weight part: 16 parts of 7-10mm white fused alumina particles, 22 parts of 4-7mm white fused alumina particles, 6 parts of 1-4mm white fused alumina particles ,-200 order α-Al
2o
35 parts ,-200 6 parts, order electric smelting aluminum-spinel powder ,-200 7 parts, order magnesium oxide ,-200 2 parts of order metallic aluminium powders, 2.5 parts of Sodium hexametaphosphate 99s, 3 parts of the magnesium chloride solutions of concentration 25%, 1.5 parts of wooden sodium sulfonates, described preparation method comprises the steps:
1) three kinds of white fused alumina particles are put into mixer and mix 5 minutes, take out for subsequent use;
2) by α-Al
2o
3, electric smelting aluminum-spinel powder, magnesium oxide and metallic aluminium powder put into mixer and mix 10 minutes;
3) by the 1st) compound prepared of step adds the 2nd) in the mixer of step, remix 10 minutes, then adds magnesium chloride solution and the wooden sodium sulfonate of Sodium hexametaphosphate 99, concentration 25%, and then mixes discharging 10 minutes;
4) ageing mixture 1 hour after discharging, then by pressing machine compression moulding, enters 200 ℃ of dry can making for 24 hours of dry kiln.
Embodiment bis-
A preparation technology for carbon-free steel cylinder-packing refractory brick, this refractory brick is made up of following component in weight part: 18 parts of 7-10mm white fused alumina particles, 20 parts of 4-7mm white fused alumina particles, 8 parts of 1-4mm white fused alumina particles ,-200 order α-Al
2o
33 parts ,-200 8 parts, order electric smelting aluminum-spinel powder ,-200 5 parts, order magnesium oxide ,-200 4 parts of order metallic aluminium powders, 1.5 parts of Sodium hexametaphosphate 99s, 5 parts of the magnesium chloride solutions of concentration 25%, 0.5 part of wooden sodium sulfonate, described preparation method comprises the steps:
1) three kinds of white fused alumina particles are put into mixer and mix 8 minutes, take out for subsequent use;
2) by α-Al
2o
3, electric smelting aluminum-spinel powder, magnesium oxide and metallic aluminium powder put into mixer and mix 15 minutes;
3) by the 1st) compound prepared of step adds the 2nd) in the mixer of step, remix 15 minutes, then adds magnesium chloride solution and the wooden sodium sulfonate of Sodium hexametaphosphate 99, concentration 25%, and then mixes discharging 15 minutes;
4) ageing mixture 2 hours after discharging, then by pressing machine compression moulding, enters 200 ℃ of dry can making for 24 hours of dry kiln.
Embodiment tri-
A preparation technology for carbon-free steel cylinder-packing refractory brick, this refractory brick is made up of following component in weight part: 17 parts of 7-10mm white fused alumina particles, 21 parts of 4-7mm white fused alumina particles, 7 parts of 1-4mm white fused alumina particles ,-200 order α-Al
2o
34 parts ,-200 7 parts, order electric smelting aluminum-spinel powder ,-200 6 parts, order magnesium oxide ,-200 3 parts of order metallic aluminium powders, 2 parts of Sodium hexametaphosphate 99s, 4 parts of the magnesium chloride solutions of concentration 25%, 1 part of wooden sodium sulfonate, described preparation method comprises the steps:
1) three kinds of white fused alumina particles are put into mixer and mix 6.5 minutes, take out for subsequent use;
2) by α-Al
2o
3, electric smelting aluminum-spinel powder, magnesium oxide and metallic aluminium powder put into mixer and mix 13 minutes;
3) by the 1st) compound prepared of step adds the 2nd) in the mixer of step, remix 13 minutes, then adds magnesium chloride solution and the wooden sodium sulfonate of Sodium hexametaphosphate 99, concentration 25%, and then mixes discharging 13 minutes;
4) ageing mixture 1.5 hours after discharging, then by pressing machine compression moulding, enters 200 ℃ of dry can making for 24 hours of dry kiln.
Claims (1)
1. a preparation technology for carbon-free steel cylinder-packing refractory brick, is characterized in that, this refractory brick is made up of following component in weight part: 7-10mm white fused alumina particle 16-18 part, 4-7mm white fused alumina particle 20-22 part, 1-4mm white fused alumina particle 6-8 part ,-200 order α-Al
2o
33-5 part ,-200 order electric smelting aluminum-spinel powder 6-8 parts ,-200 order magnesium oxide 5-7 parts,-200 order metallic aluminium powder 2-4 parts, Sodium hexametaphosphate 99 1.5-2.5 part, magnesium chloride solution 3-5 part of concentration 25%, the 0.5-1.5 of wooden sodium sulfonate part, described preparation method comprises the steps:
1) three kinds of white fused alumina particles are put into mixer mixing 5-8 minute, take out for subsequent use;
2) by α-Al
2o
3, electric smelting aluminum-spinel powder, magnesium oxide and metallic aluminium powder put into mixer mixing 10-15 minute;
3) by the 1st) compound prepared of step adds the 2nd) in the mixer of step, remix 10-15 minute, then adds magnesium chloride solution and the wooden sodium sulfonate of Sodium hexametaphosphate 99, concentration 25%, and then mixes 10-15 minute, discharging;
4) ageing mixture 1-2 hour after discharging, then by pressing machine compression moulding, enters 200 ℃ of dry can making for 24 hours of dry kiln.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210433730.1A CN103787671A (en) | 2012-11-03 | 2012-11-03 | Preparation process of carbon-free steel packing refractory bricks |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210433730.1A CN103787671A (en) | 2012-11-03 | 2012-11-03 | Preparation process of carbon-free steel packing refractory bricks |
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| CN103787671A true CN103787671A (en) | 2014-05-14 |
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| CN201210433730.1A Pending CN103787671A (en) | 2012-11-03 | 2012-11-03 | Preparation process of carbon-free steel packing refractory bricks |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495712A (en) * | 2016-10-17 | 2017-03-15 | 安徽马钢耐火材料有限公司 | Unburned ladle brick and preparation method thereof pressed by magnesium gel combined corundum spinelle machine |
| CN106810218A (en) * | 2016-12-28 | 2017-06-09 | 江苏苏嘉集团新材料有限公司 | Carbon-free ladle brick of high intensity and preparation method thereof |
| CN106866126A (en) * | 2017-03-28 | 2017-06-20 | 武汉科技大学 | A kind of corundum spinelle refractory brick and preparation method thereof |
| CN116063085A (en) * | 2022-12-19 | 2023-05-05 | 苏州大学 | In-situ spinel Dan Gangbao brick for high-cleanness steel smelting and preparation method thereof |
-
2012
- 2012-11-03 CN CN201210433730.1A patent/CN103787671A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495712A (en) * | 2016-10-17 | 2017-03-15 | 安徽马钢耐火材料有限公司 | Unburned ladle brick and preparation method thereof pressed by magnesium gel combined corundum spinelle machine |
| CN106810218A (en) * | 2016-12-28 | 2017-06-09 | 江苏苏嘉集团新材料有限公司 | Carbon-free ladle brick of high intensity and preparation method thereof |
| CN106866126A (en) * | 2017-03-28 | 2017-06-20 | 武汉科技大学 | A kind of corundum spinelle refractory brick and preparation method thereof |
| CN116063085A (en) * | 2022-12-19 | 2023-05-05 | 苏州大学 | In-situ spinel Dan Gangbao brick for high-cleanness steel smelting and preparation method thereof |
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Application publication date: 20140514 |