CN102153356A - Low thermal conductance continuous casting tundish working layer lining brick and preparation method thereof - Google Patents
Low thermal conductance continuous casting tundish working layer lining brick and preparation method thereof Download PDFInfo
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- CN102153356A CN102153356A CN 201010589049 CN201010589049A CN102153356A CN 102153356 A CN102153356 A CN 102153356A CN 201010589049 CN201010589049 CN 201010589049 CN 201010589049 A CN201010589049 A CN 201010589049A CN 102153356 A CN102153356 A CN 102153356A
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- magnesia
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Abstract
The invention relates to a brick for a continuous casting tundish working layer and a preparation method. The brick comprises the following components in percentage by weight: 15 to 30 percent of magnesium calcium sand or magnesium sand with granularity of 1 to 2 millimeters, 51 to 70 percent of magnesium calcium sand or magnesium sand with granularity of 0.5 to 1 millimeter, 13 to 20 percent of magnesium calcium sand or magnesium sand with granularity of less than 0.088 millimeter, 1 to 3 percent of modified petroleum coke with granularity of less than 0.088 millimeter, and modified phenolic resin in an amount which is 2 to 4 percent of the total weight of the previous raw materials. The preparation method comprises the following steps of: pre-mixing the magnesium calcium sand or the magnesium sand with granularity of 1 to 2 millimeters and the magnesium calcium sand or magnesium sand with granularity of 0.5 to 1 millimeter; sequentially adding the modified phenolic resin and the modified petroleum coke, mixing and grinding; adding the magnesium calcium sand or magnesium sand with granularity of less than 0.088 millimeter, mixing and grinding; ageing the mixture, pressing and molding; performing natural drying; heating and drying in a kiln; performing natural cooling together with the kiln; and discharging the product out of the kiln, and naturally cooling the product to room temperature. The brick has the characteristics of low thermal conduction coefficient, strong scouring resistance and erosion resistance, simple construction, low baking energy consumption and the like.
Description
Technical field
The present invention relates to a kind of ferrous metallurgy refractory materials, specifically relate to a kind of low-heat guide bush brick that is applied to the continuous casting bakie working lining and preparation method thereof.
Background technology
The tundish working lining adopts at present mostly is that unshape refractory is smeared (divide artificial again or machinery is smeared) and the mode of dry type ramming is constructed, or adopts the mode of adiabatic precoated plate to assemble, and in practice of construction and use, has following problem:
1, stirring, batch mixing and smear that influenced by human factor bigger in the unshape refractory construction process, construction quality is difficult to guarantee the bad control of thickness;
2, unshape refractory structural strength, scour resistance and resistance to fouling are lower, easily cause working lining to peel off because of washing away, corroding in the use, and forming inclusion influences the molten steel quality.
3, unshape refractory is taked to smear or the ramming construction, and water content is higher in the material, and baking easy crackle occurs and influences use, and baking cycle is longer, and energy consumption height and equipment turnover utilization ratio are low; Moisture is difficult for draining, and easily causes hydrogen richness rising in the molten steel in the use.
4, adopt the mode of adiabatic precoated plate assembling easily to cause thermal stresses to be concentrated, the part occurs peeling off with molten steel oozes the biography accident, and especially this mode has seldom been adopted at the position, turning at present.
Summary of the invention
The objective of the invention is to overcome the shortcoming that above-mentioned tundish working lining exists, provide a kind of and have that thermal conductivity is low, scour resistance and resistance to fouling is strong, construction is simple, the baking energy consumption is low etc. low thermal conductance continuous casting bakie working lining lining brick prescription and preparation method thereof.
Realize the technical scheme of above-mentioned purpose:
Low thermal conductance continuous casting bakie working lining lining brick, its component and weight percent are: 1～2 millimeter calcium magnesia sand of granularity or magnesia are 15～30%, calcium magnesia sand that granularity is 0.5～1 millimeter or magnesia are 51～70%, granularity is 13～20% less than 0.088 millimeter calcium magnesia sand or magnesia, granularity is 1～3% adding less than 0.088 millimeter modification refinery coke, and modified phenolic resins is pressed 2～4% of above-mentioned raw materials gross weight and added; The performance index of its brick require: thermal conductivity≤2.5W/mK, volume density is 1.8g/cm
3～2.5g/cm
3, and MgO+CaO content is at least 86%.
The method of the low thermal conductance bakie working lining lining brick of preparation, its step:
1) above-mentioned raw materials is added in order: 1～2 millimeter calcium magnesia sand of granularity or magnesia are 15～30%, and calcium magnesia sand that granularity is 0.5～1 millimeter or magnesia are 51～70%;
2) above-mentioned raw materials is carried out premix, doing time in advance is 3～5 minutes;
3) add modified phenolic resins successively by 2～4% of above-mentioned raw materials gross weight, granularity is 1～3% less than 0.088 millimeter modification refinery coke, mixed grind 3～5 minutes;
4) adding granularity is 13～25% less than 0.088 millimeter calcium magnesia sand or magnesia, mixed grind 10～15 minutes;
5) carry out the Sleepy material, the time is 8～24 hours, compression moulding again;
6) carry out seasoning, be 8～24 hours time of drying;
7) in kiln, carry out heat drying: at first adobe is warmed up to 85 ℃～95 ℃, is incubated 3.5～4.5 hours; Reheat is warming up to 115 ℃～125 ℃, is incubated 3.5～4.5 hours; Be warming up to 195 ℃～205 ℃ at last, be incubated 11～13 hours;
8) cool off: at first naturally cool to 80 ℃～60 ℃ with kiln;
9) kiln discharge and naturally cool to room temperature;
10) kiln discharge, check, stand-by.
Beneficial effect of the present invention is:
1) low thermal conductance tundish working lining of the present invention changes the typing fire resistive material product into by the unshape refractory goods, form of construction work is built by laying bricks or stones by smearing to change into the dry type ramming, reduce the construction dust discharge, improved operating environment, reduced labour intensity;
Performances such as 2) bakie working lining lining brick of the present invention has the intensity height, volume density is little and thermal conductivity is low have characteristics such as scour resistance and resistance to fouling are strong, construction is simple, the baking energy consumption is low;
3) compare with bag working lining in the unshape refractory, improve work-ing life more than 1 times, storing time and energy consumption save 80%, have significantly saved material and energy consumption, have increased substantially production efficiency;
4) result of use is compared with bag working lining in the unshape refractory, and foreign matter content reduces by 50% in the molten steel, and the molten steel hydrogen richness raise and reduces 1ppm-3ppm during production was used, for favourable condition has been created in the production of fine quality steel.
Embodiment
Embodiment of the present invention is according to aforesaid component and span and preparation method, and carries out simultaneous test, and its embodiment, result are as follows:
Table 1 is the component and the value of the embodiment of the invention and Comparative Examples;
Table 2 is the concrete preparation technology of table 1 embodiment, and Comparative Examples adopts identical technology;
Table 3 is the physical and chemical index assay of the embodiment of the invention and Comparative Examples;
The component of table 1 embodiment and Comparative Examples and value
Be prepared according to preparation process: table 2 is the concrete preparation technology of embodiment
The physical and chemical index assay of table 3 working lining brick:
As can be seen from Table 3, the bakie working lining lining brick produced of above-mentioned prescription and preparation method has that thermal conductivity is low, volume density is little and characteristics such as intensity height.
The bakie working lining lining brick that adopts above-mentioned prescription and preparation method production is through test, its result compares with the unshape refractory cylinder-packing, improve work-ing life more than 1 times, storing time and energy consumption save 80%, foreign matter content reduces by 50% in the molten steel, easily causes hydrogen richness rising reduction 3ppm in the molten steel in the use.Not only saved material and energy consumption, improved production efficiency, also created favourable condition simultaneously for the production of fine quality steel.
Need to prove that except above-mentioned points, the raw material of bakie working lining lining brick also can be magnesia and calcium magnesia sand carries out the blended compound according to a certain percentage.
Claims (2)
1. low thermal conductance continuous casting bakie working lining lining brick, its component and weight percent are: 1～2 millimeter calcium magnesia sand of granularity or magnesia are 15～30%, calcium magnesia sand that granularity is 0.5～1 millimeter or magnesia are 51～70%, granularity is 13～20% less than 0.088 millimeter calcium magnesia sand or magnesia, granularity is 1～3% adding less than 0.088 millimeter modification refinery coke, and modified phenolic resins is pressed 2～4% of above-mentioned raw materials gross weight and added; The performance index of its brick require: thermal conductivity≤2.5W/mK, volume density is 1.8g/cm
3～2.5g/cm
3, and MgO+CaO content is at least 86%.
2. prepare the described low thermal conductance continuous casting bakie working lining lining brick method of claim 1, its step:
1) above-mentioned raw materials is added in order: 1～2 millimeter calcium magnesia sand of granularity or magnesia are 15～30%, and calcium magnesia sand that granularity is 0.5～1 millimeter or magnesia are 51～70%;
2) above-mentioned raw materials is carried out premix, doing time in advance is 3～5 minutes;
3) add modified phenolic resins successively by 2～4% of above-mentioned raw materials gross weight, granularity is 1～3% less than 0.088 millimeter modification refinery coke, mixed grind 3～5 minutes;
4) adding granularity is 13～25% less than 0.088 millimeter calcium magnesia sand or magnesia, mixed grind 10～15 minutes;
5) carry out the Sleepy material, the time is 8～24 hours, compression moulding again;
6) carry out seasoning, be 8～24 hours time of drying;
7) in kiln, carry out heat drying: at first adobe is warmed up to 85 ℃～95 ℃, is incubated 3.5～4.5 hours; Reheat is warming up to 115 ℃～125 ℃, is incubated 3.5～4.5 hours; Be warming up to 195 ℃～205 ℃ at last, be incubated 11～13 hours;
8) cool off: at first naturally cool to 80 ℃～60 ℃ with kiln;
9) kiln discharge and naturally cool to room temperature;
10) check, stand-by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010589049 CN102153356B (en) | 2010-12-15 | 2010-12-15 | Low thermal conductance continuous casting tundish working layer lining brick and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010589049 CN102153356B (en) | 2010-12-15 | 2010-12-15 | Low thermal conductance continuous casting tundish working layer lining brick and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102153356A true CN102153356A (en) | 2011-08-17 |
| CN102153356B CN102153356B (en) | 2013-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010589049 Expired - Fee Related CN102153356B (en) | 2010-12-15 | 2010-12-15 | Low thermal conductance continuous casting tundish working layer lining brick and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103936435A (en) * | 2014-03-26 | 2014-07-23 | 德清广能耐火材料有限公司 | Magnesium-calcium spinel refractory brick and preparation method thereof |
| CN110891918A (en) * | 2017-08-10 | 2020-03-17 | 里弗雷克特里知识产权两合公司 | Method for treating magnesite, sintered magnesia produced by the method and sintered refractory ceramic product produced by the method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5318933A (en) * | 1993-03-24 | 1994-06-07 | Indresco Inc. | Carbon-containing carbon bonded refractories with improved physical properties |
| CN1154955A (en) * | 1996-08-08 | 1997-07-23 | 樊龙生 | Liner for steel-making pouring-basket and making method thereof |
| US20040157724A1 (en) * | 2003-02-07 | 2004-08-12 | Doza Douglas K. | Crack-resistant insulating dry refractory |
| CN101121602A (en) * | 2007-07-25 | 2008-02-13 | 濮阳濮耐高温材料（集团）股份有限公司 | Dispersion type magnesium air brick for bakie |
| CN101508586A (en) * | 2009-03-27 | 2009-08-19 | 武汉钢铁(集团)公司 | Paint for continuous casting pouring box work liner and preparing technique thereof |
-
2010
- 2010-12-15 CN CN 201010589049 patent/CN102153356B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5318933A (en) * | 1993-03-24 | 1994-06-07 | Indresco Inc. | Carbon-containing carbon bonded refractories with improved physical properties |
| CN1154955A (en) * | 1996-08-08 | 1997-07-23 | 樊龙生 | Liner for steel-making pouring-basket and making method thereof |
| US20040157724A1 (en) * | 2003-02-07 | 2004-08-12 | Doza Douglas K. | Crack-resistant insulating dry refractory |
| CN101121602A (en) * | 2007-07-25 | 2008-02-13 | 濮阳濮耐高温材料（集团）股份有限公司 | Dispersion type magnesium air brick for bakie |
| CN101508586A (en) * | 2009-03-27 | 2009-08-19 | 武汉钢铁(集团)公司 | Paint for continuous casting pouring box work liner and preparing technique thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103936435A (en) * | 2014-03-26 | 2014-07-23 | 德清广能耐火材料有限公司 | Magnesium-calcium spinel refractory brick and preparation method thereof |
| CN110891918A (en) * | 2017-08-10 | 2020-03-17 | 里弗雷克特里知识产权两合公司 | Method for treating magnesite, sintered magnesia produced by the method and sintered refractory ceramic product produced by the method |
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| Publication number | Publication date |
|---|---|
| CN102153356B (en) | 2013-01-09 |
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Effective date of registration: 20181116 Address after: No. 1, Qingshan District, Hubei Province, Wuhan City, Hubei Patentee after: Wuhan Iron & Steel (Group) Corp. Address before: 430080 999 Friendship Avenue, Wuchang District, Wuhan, Hubei. Patentee before: Wuhan Iron & Steel (Group) Corp. |
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