CN101973774A - Hydration-resistant high-calcium magnesia-calcium brick and production process thereof - Google Patents
Hydration-resistant high-calcium magnesia-calcium brick and production process thereof Download PDFInfo
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- CN101973774A CN101973774A CN2010105309704A CN201010530970A CN101973774A CN 101973774 A CN101973774 A CN 101973774A CN 2010105309704 A CN2010105309704 A CN 2010105309704A CN 201010530970 A CN201010530970 A CN 201010530970A CN 101973774 A CN101973774 A CN 101973774A
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Abstract
The invention discloses a hydration-resistant high-calcium magnesia-calcium brick and a production process thereof. The hydration-resistant high-calcium magnesia-calcium brick comprises the following components in percentage by weight: 30 to 40 percent of 7-3 mm magnesia-calcium sand, 20 to 25 percent of 3-1 mm magnesia-calcium sand, 15 to 20 percent of <=1 mm magnesia-calcium sand, 15 to 20 percent of <=0.088 mm magnesia-calcium sand fine powder, 5 to 10 percent of <=0.088 mm fused magnesia fine powder, and 3 to 5 percent of additional bonding agent. The production process comprises the following steps of: preparing each raw material according to corresponding proportions; mulling, forming and baking the raw materials; soaking the raw materials in wax; and performing vacuum thermoplastic packaging to obtain a final product. The product has high slag resistance, thermal shock resistance and high-temperature resistance and high volume stability under high-temperature vacuum, simultaneously contains 50 percent of free CaO, has a function of purifying molten steel, and is particularly suitable for smelting clean steel.
Description
Technical field
The present invention relates to a kind of Clean Steel smelts with hydration-resistance high-calcium magnesia-calcium brick and production technique thereof.
Background technology
In recent years, steel-smelting technology develops to advanced and cleanization direction day by day, external refining and continuous casting steel machine and follow continuing to bring out of novel process such as high temperature tapping make steel-making worsen day by day with the Working environment of refractory materials in addition, wish that simultaneously refractory materials has the ability of certain purifying of steel.Under this background, the magnesium calcium material that contains free CaO causes generally attention both domestic and external gradually, is listed in one of four great development directions of China's 21 century refractory materials.
At present, the magnesia-calcium brick of domestic production, general CaO content is 20～40%, and the magnesia-calcium brick greater than 50% seldom has industrial production, because the high more easy more aquation of CaO content is produced difficult more.Yet theory and practice proves that the magnesia-calcium brick of CaO content height (〉=50%) is better to the decontamination effect improving of molten steel.Therefore develop the hydration-resistance high-calcium magnesia-calcium brick, have important and practical meanings and application prospect smelting Clean Steel.
Summary of the invention
The present invention aims to provide a kind of free CaO content 〉=50%, hydration-resistance high-calcium magnesia-calcium brick and production technique thereof.
For achieving the above object, the technical solution used in the present invention is:
A kind of hydration-resistance high-calcium magnesia-calcium brick, the mass percent of component that described high calcium magnesia brick adopts and each component is: 7-3mm calcium magnesia sand 30～40%, 3-1mm calcium magnesia sand 20～25%, ≤ 1mm calcium magnesia sand 15～20%, ≤ 0.088mm calcium magnesia sand fine powder 15～20%, ≤ 0.088mm electrosmelted magnesite clinker fine powder 5～10%, adding wedding agent is 3%～5% of feed composition weight.
A kind of hydration-resistance high-calcium magnesia-calcium brick, the mass percent of the chemical composition of described high calcium magnesia brick is: MgO 40%～50%, and CaO 50%～55%, SiO
2+ Al
2O
3+ Fe
2O
3＜2%.
Described calcium magnesia sand, free CaO are 56～59%, volume density 〉=3.35g/cm3, apparent porosity≤0.5%.
Described electrosmelted magnesite clinker MgO 〉=99%.
Above-mentioned wedding agent is the mixing solutions of anhydrous no hydroxy resin with the alcohol dilution.
A kind of production technique of hydration-resistance high-calcium magnesia-calcium brick, its step is as follows:
1) feed composition being put into mixer by mass percentage mixes;
2) material that step 1) is prepared takes by weighing the required weight of monolithic biscuit and inserts die for molding;
3) with step 2) biscuit of forming drying become directly into the high temperature klining, firing temperature is 1600～1650 ℃, is incubated 6～10 hours;
4) goods that step 3) is burnt till soak cured processing, then through vacuum thermoplastic packing, to prevent its aquation.
Characteristics of the present invention are: 1. adopt the calcium magnesia sand of high-compactness, apparent porosity≤0.5% weakens water vapour by the velocity of diffusion of particle surface to inside, improves calcium magnesia sand particulate hydration resistance; 2. add the high-purity electrosmelted magnesite clinker fine powder of part in the matrix, also improved slag resistance when improving hydration resistance; 3. the selection of wedding agent.Produce magnesia-calcium brick at present and all select solid paraffin or pitch as wedding agent, when making wedding agent with solid paraffin, must adopt the heated and stirred machine that solid paraffin is melted, then there are shortcomings such as the smell is awful, poisonous in complex operation, pitch.The wedding agent that the present invention adopts does not have the mixing solutions of hydroxy resin and alcohol, the bonding strength height, and nontoxic, no stink has greatly improved operating environment.
The hydration-resistance high-calcium magnesia-calcium brick that the present invention proposes, has volume stability good under good slag resistance, thermal shock resistance, resistance to elevated temperatures and the high-temperature vacuum, contain free CaO simultaneously, molten steel is had cleaning action, be specially adapted to the smelting of Clean Steel up to 50%.
The hydration-resistance high-calcium magnesia-calcium brick that adopts the inventive method to make, performance is as follows:
Embodiment
In conjunction with the embodiments the present invention is illustrated:
Embodiment 1: be 35% 7-3mm calcium magnesia sand by mass percent, 23% 3-1mm calcium magnesia sand, 17%≤the 1mm calcium magnesia sand, 20%≤the calcium magnesia sand fine powder of 0.088mm and 5%≤the electrosmelted magnesite clinker fine powder constitutive material of 0.088mm, add wedding agent 3%, wedding agent is the mixing solutions of anhydrous no hydroxy resin with the alcohol dilution; The anhydrous no hydroxy resin of producing as the molten prosperous anti-material in Xinxiang City, Henan limited liability company.Processing step is as follows:
1) feed composition being put into mixer by mass percentage mixes;
2) material that step 1) is prepared takes by weighing the required weight of monolithic biscuit and inserts die for molding;
3) with step 2) biscuit of forming drying become directly into the high temperature klining, firing temperature is 1650 ℃, is incubated 6 hours;
4) goods that step 3) is burnt till soak cured processing, then through vacuum thermoplastic packing, to prevent its aquation.
The chemical composition of embodiment 1 high calcium magnesia brick is: CaO:54%, MgO:45%.
Embodiment 2: be 30% 7-3mm calcium magnesia sand by mass percent, 25% 3-1mm calcium magnesia sand, 20%≤the 1mm calcium magnesia sand, 18%≤the calcium magnesia sand fine powder of 0.088mm and and 7%≤the electrosmelted magnesite clinker fine powder constitutive material of 0.088mm, add wedding agent 4%, wedding agent is the mixing solutions of anhydrous no hydroxy resin with the alcohol dilution; The anhydrous no hydroxy resin of producing as the molten prosperous anti-material in Xinxiang City, Henan limited liability company.Processing step is as follows:
1) feed composition being put into mixer by mass percentage mixes;
2) material that step 1 is prepared takes by weighing the required weight of monolithic biscuit and inserts die for molding;
3) with the biscuit of step 2 forming drying become directly into the high temperature klining, firing temperature is 1600 ℃, is incubated 10 hours;
4) goods that step 3 is burnt till soak cured processing, then through vacuum thermoplastic packing, to prevent its aquation.
The chemical composition of embodiment 2 high calcium magnesia bricks is: CaO:53%, MgO:46%.
Embodiment 3: be 40% 7-3mm calcium magnesia sand by mass percent, 20% 3-1mm calcium magnesia sand, 15%≤the 1mm calcium magnesia sand, 15%≤the calcium magnesia sand fine powder of 0.088mm and 10%≤the electrosmelted magnesite clinker fine powder constitutive material of 0.088mm, add wedding agent 5%, wedding agent is the mixing solutions of anhydrous no hydroxy resin with the alcohol dilution; The anhydrous no hydroxy resin of producing as the molten prosperous anti-material in Xinxiang City, Henan limited liability company.Processing step is as follows:
1) feed composition being put into mixer by mass percentage mixes;
2) material that step 1 is prepared takes by weighing the required weight of monolithic biscuit and inserts die for molding;
3) with the biscuit of step 2 forming drying become directly into the high temperature klining, firing temperature is 1630 ℃, is incubated 8 hours;
4) goods that step 3 is burnt till soak cured processing, then through vacuum thermoplastic packing, to prevent its aquation.
The chemical composition of embodiment 3 high calcium magnesia bricks is: CaO:51%, MgO:48%.
Claims (6)
1. hydration-resistance high-calcium magnesia-calcium brick, it is characterized in that: the mass percent of the component that adopts and each component be: 7-3mm calcium magnesia sand 30～40%, 3-1mm calcium magnesia sand 20～25%, ≤ 1mm calcium magnesia sand 15～20%, ≤ 0.088mm calcium magnesia sand fine powder 15～20%, ≤ 0.088mm electrosmelted magnesite clinker fine powder 5～10% adds wedding agent 3～5%.
2. according to the described a kind of hydration-resistance high-calcium magnesia-calcium brick of claim 1, it is characterized in that the mass percent of described hydration-resistance high-calcium magnesia-calcium bricking component is: MgO 40%～50%, and CaO 50%～55%, SiO
2+ Al
2O
3+ Fe
2O
3＜2%.
3. according to the described a kind of hydration-resistance high-calcium magnesia-calcium brick of claim 1, it is characterized in that described calcium magnesia sand, free CaO is 56～59%, volume density 〉=3.35g/cm3, apparent porosity≤0.5%.
4. according to the described a kind of hydration-resistance high-calcium magnesia-calcium brick of claim 1, it is characterized in that MgO 〉=99% of described electrosmelted magnesite clinker.
5. according to the described a kind of hydration-resistance high-calcium magnesia-calcium brick of claim 1, it is characterized in that described wedding agent is for being the mixing solutions of anhydrous no hydroxy resin with the alcohol dilution.
6. the production technique of the described hydration-resistance high-calcium magnesia-calcium brick of claim 1, it is characterized in that: its processing step is as follows:
1) feed composition being put into mixer by mass percentage mixes;
2) material that step 1) is prepared takes by weighing the required weight of monolithic biscuit and inserts die for molding;
3) with step 2) biscuit of forming drying become directly into the high temperature klining, firing temperature is 1600～1650 ℃, is incubated 6～10 hours;
4) goods that step 3) is burnt till soak cured processing, then through vacuum thermoplastic packing, to prevent its aquation.
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| CN2010105309704A CN101973774A (en) | 2010-10-28 | 2010-10-28 | Hydration-resistant high-calcium magnesia-calcium brick and production process thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276272A (en) * | 2011-07-11 | 2011-12-14 | 浙江金磊高温材料股份有限公司 | High-calcium magnesia-calcia bricks and preparation method thereof |
| CN102659434A (en) * | 2012-05-18 | 2012-09-12 | 贵阳明通炉料有限公司 | Hydration-resistance sintered magnesia calcium brick |
| CN103058678A (en) * | 2012-12-27 | 2013-04-24 | 浙江金磊高温材料股份有限公司 | High-density ultrahigh-purity magnesia-calcium brick and preparation method thereof |
| CN103396142A (en) * | 2013-08-14 | 2013-11-20 | 辽宁中镁高温材料有限公司 | Composite magnesium-calcium brick having low heat conductivity and high service performance and manufacturing method thereof |
| 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 |
| CN104876597A (en) * | 2015-05-08 | 2015-09-02 | 辽宁中镁高温材料有限公司 | Nano-matrix-combined high-performance fused magnesium calcium brick and manufacturing method thereof |
| CN106915952A (en) * | 2017-04-01 | 2017-07-04 | 海城市中兴镁质合成材料有限公司 | A kind of method for producing AOD furnace magnesium calcium ramming mass using useless magnesia-calcium brick |
| CN107814562A (en) * | 2017-10-11 | 2018-03-20 | 马鞍山豹龙新型建材有限公司 | A kind of production method of the composite modified aluminium-magnesia carbon brick of organosilicon and dolomite |
| CN111217613A (en) * | 2020-02-17 | 2020-06-02 | 武汉科技大学 | Magnesium-calcium material and preparation method thereof |
| CN111943692A (en) * | 2020-06-30 | 2020-11-17 | 辽宁东和新材料股份有限公司 | High-performance magnesia-calcium brick and preparation method thereof |
| CN112500135A (en) * | 2021-02-05 | 2021-03-16 | 北京利尔高温材料股份有限公司 | Magnesium-calcium tundish dry working lining material and preparation method thereof |
| CN116239389A (en) * | 2023-01-28 | 2023-06-09 | 马鞍山利尔开元新材料有限公司 | Low-carbon magnesium-calcium ladle sliding plate brick and preparation method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276272A (en) * | 2011-07-11 | 2011-12-14 | 浙江金磊高温材料股份有限公司 | High-calcium magnesia-calcia bricks and preparation method thereof |
| CN102659434A (en) * | 2012-05-18 | 2012-09-12 | 贵阳明通炉料有限公司 | Hydration-resistance sintered magnesia calcium brick |
| CN103058678A (en) * | 2012-12-27 | 2013-04-24 | 浙江金磊高温材料股份有限公司 | High-density ultrahigh-purity magnesia-calcium brick and preparation method thereof |
| CN103396142A (en) * | 2013-08-14 | 2013-11-20 | 辽宁中镁高温材料有限公司 | Composite magnesium-calcium brick having low heat conductivity and high service performance and manufacturing method thereof |
| CN103396142B (en) * | 2013-08-14 | 2014-10-22 | 辽宁中镁高温材料有限公司 | Composite magnesium-calcium brick having low heat conductivity and high service performance and manufacturing method thereof |
| 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 |
| CN104876597A (en) * | 2015-05-08 | 2015-09-02 | 辽宁中镁高温材料有限公司 | Nano-matrix-combined high-performance fused magnesium calcium brick and manufacturing method thereof |
| CN106915952A (en) * | 2017-04-01 | 2017-07-04 | 海城市中兴镁质合成材料有限公司 | A kind of method for producing AOD furnace magnesium calcium ramming mass using useless magnesia-calcium brick |
| CN107814562A (en) * | 2017-10-11 | 2018-03-20 | 马鞍山豹龙新型建材有限公司 | A kind of production method of the composite modified aluminium-magnesia carbon brick of organosilicon and dolomite |
| CN111217613A (en) * | 2020-02-17 | 2020-06-02 | 武汉科技大学 | Magnesium-calcium material and preparation method thereof |
| CN111943692A (en) * | 2020-06-30 | 2020-11-17 | 辽宁东和新材料股份有限公司 | High-performance magnesia-calcium brick and preparation method thereof |
| CN111943692B (en) * | 2020-06-30 | 2022-05-10 | 辽宁东和新材料股份有限公司 | High-performance magnesia-calcium brick and preparation method thereof |
| CN112500135A (en) * | 2021-02-05 | 2021-03-16 | 北京利尔高温材料股份有限公司 | Magnesium-calcium tundish dry working lining material and preparation method thereof |
| CN116239389A (en) * | 2023-01-28 | 2023-06-09 | 马鞍山利尔开元新材料有限公司 | Low-carbon magnesium-calcium ladle sliding plate brick and preparation method thereof |
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Application publication date: 20110216 |