CN103819204B - Silicon carbide electrofused mullite matter wear-resistant castable - Google Patents
Silicon carbide electrofused mullite matter wear-resistant castable Download PDFInfo
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- CN103819204B CN103819204B CN201310559798.9A CN201310559798A CN103819204B CN 103819204 B CN103819204 B CN 103819204B CN 201310559798 A CN201310559798 A CN 201310559798A CN 103819204 B CN103819204 B CN 103819204B
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Abstract
The invention discloses silicon carbide mullite wear-resistant castable, comprise following component and the mass percent of each component is:
Description
Technical field
The present invention relates to silicon carbide electrofused mullite matter wear-resistant castable.
Background technology
Cement rotary kiln tertiary-air pipe straight tube, elbow, kiln head cover slope, stalk, the positions such as grate cooler sunk fence due to temperature higher, in medium, Dust Capacity is large, souring is strong, and dust neutral and alkali composition weight, easily chemical erosion is caused to cement kiln equipment refractory materials working lining, alkali components at high temperature with working lining material reacts, generate low temperature liquid phase, liquid phase generates infiltration to working lining coating material further and corrodes, affect working lining materials'use performance, shorten working lining work-ing life, cause working lining material damage frequent, rotary kiln has to often stop kiln repairing.
Summary of the invention
Problem to be solved by this invention is to provide silicon carbide electrofused mullite matter wear-resistant castable, high temperature resistant, wear-resisting antiscour, resistant to corrosion, anti-thermal shock.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: silicon carbide electrofused mullite matter wear-resistant castable, comprises following component and the mass percent of each component is:
Aggregate 50-65%;
Fine powder 10-20%;
Micro mist 5-20%;
Composite additive 3-10%;
Bonding agent 3-6%;
Heat-resistant steel fiber 1-2%.
Improve, mould material is made up of aggregate, fine powder, micro mist, composite additive, bonding agent and heat-resistant steel fiber.
Improve, a aggregate comprises following component and the mass percent of each component is:
Granularity is the electrofused mullite aggregate 50-70% of 0.1-8mm;
Granularity is the carborundum aggregate 10-20% of 0.1-3mm;
Siliceous mullite brick aggregate 10-20%;
Alumine aggregate 8-15%.
Improve, a fine powder comprises following component and the mass percent of each component is:
Granularity≤180 object electrofused mullite fine powder 30-55%;
Granularity≤320 object siliceous mullite brick fine powder 30-55%;
Carbide fine powder 15-25%.
Improve, a fine powder comprises following component and the mass percent of each component is:
Granularity≤180 object electrofused mullite fine powder 25-50%;
Granularity≤320 object siliceous mullite brick fine powder 25-50%;
Carbide fine powder 10-20%;
High alumina fine powder 5-15%.
Improve, described siliceous mullite brick aggregate and siliceous mullite brick fine powder obtain by cement rotary kiln changes the lower siliceous mullite brick fragmentation of discarding when maintain and replace.
Improve, described micro mist is the combination of fine silica powder and Reactive alumina, or described micro mist is the combination of fine silica powder, Reactive alumina and modification electrofused mullite micro mist.
Improve, the mass ratio of described Reactive alumina and fine silica powder is 2.3-2.5.
Improve, described composite additive is the combination of tripoly phosphate sodium STPP and explosion-proof fiber, or described composite additive is the combination of Sodium hexametaphosphate 99 and explosion-proof fiber, or described composite additive is the combination of tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and explosion-proof fiber.
Improve, described bonding agent is one or both the combination in high-alumina cement and pure calcium aluminate cement.
Beneficial effect:
After adopting technique scheme, this invention silicon carbide electrofused mullite matter wear-resistant castable,
1) have employed high performance material electrofused mullite aggregate and carborundum aggregate as aggregate, make mould material have better high temperature resistant, antiscour, resistant to corrosion, thermal shock resistance;
2) introduce fine silica powder and Reactive alumina and the mass ratio of both adjustment to 2.3-2.5,
A. can complete secondary mullite reaction between the two fully, between matrix and aggregate, form mullite network structure, improve material monolithic intensity and wear resistance;
B. Reactive alumina reacts with primary mullite Watch glass phase high-energy state silicon oxide mullite simultaneously, network-like Ceramic bond is formed between aggregate and matrix, improve casting material strength, corrosion resistance and wear resistance, and residual silicon oxide is with glassy phase filling substrate pore, decrease rotary kiln medium osmosis and corrode path, improve material corrosion resistance, the particle simultaneously under high temperature between catalyzed aggregates matrix exchanges, and improves mould material bulk strength further;
C. secondary mullite reaction is with certain volume effect, make the densification of mould material weave construction, decrease matrix microdefect, decrease rotary kiln medium and alkali components erosion passage, further increase mould material corrosion resistance and wear resistance, after secondary mullite, in mould material, high-energy state material is fully reacted into the mullite of stable state, and mould material corrosion resistance strengthens greatly;
3) introduce cement production enterprise on rotary kiln, change the lower siliceous mullite bricks discarded in a large number when maintain and replace, the composition of discarded brick with mullite silicon carbide for major ingredient, response national energy-saving reduces discharging calls, discarded siliceous mullite brick refuse reclamation, saved the consumption of mullite aggregate and carborundum aggregate in mould material simultaneously, economize on resources, titanium oxide in addition in siliceous mullite brick, ferric oxide and silicon oxide produce liquid phase and promote mould material sintering under rotary kiln working temperature, improve mould material applied at elevated temperature performance;
4) the high disadvantageous effect brought of siliceous mullite brick porous water-absorbing rate has been contained by the interpolation of the composite additive of organic and inorganic compound;
5) have selected rational component proportion simultaneously, make Al in mould material
2o
3with mass percentage>=65% of SiC, volume density>=2.55 g/cm3 making mould material, cold conditions folding strength (110 DEG C × 24h)>=9MPa, cold conditions folding strength (1100 DEG C × 3h)>=10MPa, cold conditions compressive strength (110 DEG C × 24h)>=80MPa, cold conditions compressive strength (1100 DEG C × 3h)>=90MPa, burn after Linear change rate (1100 DEG C × 3h) for-0.10 ~-0.50%, wear resistance (1100 DEG C)≤6cm3, high temperature resistant, wear-resisting antiscour, resistant to corrosion, anti-thermal shock.
Embodiment
Silicon carbide electrofused mullite matter wear-resistant castable of the present invention is further illustrated below in conjunction with embodiment:
Embodiment one:
Silicon carbide electrofused mullite matter wear-resistant castable comprises following component and the mass percent of each component is: aggregate 50%, fine powder 20%, micro mist 12%, composite additive 10%, bonding agent 6%, heat-resistant steel fiber 2%, as preferably, mould material is only by aggregate, fine powder, micro mist, composite additive, bonding agent and heat-resistant steel fiber composition, wherein, a aggregate comprises the electrofused mullite aggregate 50% that granularity is 0.1-8mm, granularity is the carborundum aggregate 20% of 0.1-3mm, siliceous mullite brick aggregate 20% and alumine aggregate 10%, a fine powder comprises granularity≤180 object electrofused mullite fine powder 30%, granularity≤320 object siliceous mullite brick fine powder 55% and carbide fine powder 15%, described micro mist is the combination of fine silica powder and Reactive alumina, or described micro mist is fine silica powder, the combination of Reactive alumina and modification electrofused mullite micro mist, the mass ratio of described Reactive alumina and fine silica powder is 2.3-2.5, described composite additive is the combination of tripoly phosphate sodium STPP and explosion-proof fiber, or described composite additive is the combination of Sodium hexametaphosphate 99 and explosion-proof fiber, or described composite additive is tripoly phosphate sodium STPP, the combination of Sodium hexametaphosphate 99 and explosion-proof fiber, described bonding agent is high-alumina cement, or described bonding agent is pure calcium aluminate cement, or described bonding agent is the combination of high-alumina cement and pure calcium aluminate cement.
Described siliceous mullite brick aggregate and siliceous mullite brick fine powder are obtained by the discarded siliceous mullite brick fragmentation under cement rotary kiln changes when maintain and replace, cement production enterprise a large amount of siliceous mullite brick used on rotary kiln changes lower a large amount of discarded siliceous mullite brick when maintain and replace, the composition of these discarded siliceous mullite bricks with electrofused mullite silicon carbide for major ingredient, also the increase of electrofused mullite and carborundum content in mould material can be made by the interpolation of siliceous mullite brick, maximum refuse reclamation, avoid the wasting of resources and environmental pollution, respond the call that national energy-saving reduces discharging.
Embodiment two:
Silicon carbide electrofused mullite matter wear-resistant castable comprises following component and the mass percent of each component is: aggregate 65%, fine powder 10%, micro mist 18%, composite additive 3%, bonding agent 3%, heat-resistant steel fiber 1%, as preferably, mould material is only by aggregate, fine powder, micro mist, composite additive, bonding agent and heat-resistant steel fiber composition, wherein, a aggregate comprises the electrofused mullite aggregate 70% that granularity is 0.1-8mm, granularity is the carborundum aggregate 10% of 0.1-3mm, siliceous mullite brick aggregate 10%, alumine aggregate 10%, a fine powder comprises granularity≤180 object electrofused mullite fine powder 55%, granularity≤320 object siliceous mullite brick fine powder 30% and carbide fine powder 15%, described siliceous mullite brick aggregate and siliceous mullite brick fine powder are obtained by the discarded siliceous mullite brick fragmentation under cement rotary kiln changes when maintain and replace, described micro mist is the combination of fine silica powder and Reactive alumina, or, described micro mist is fine silica powder, the combination of Reactive alumina and modification electrofused mullite micro mist, the mass ratio of described Reactive alumina and fine silica powder is 2.3-2.5, described composite additive is the combination of tripoly phosphate sodium STPP and explosion-proof fiber, or, described composite additive is the combination of Sodium hexametaphosphate 99 and explosion-proof fiber, or, described composite additive is tripoly phosphate sodium STPP, the combination of Sodium hexametaphosphate 99 and explosion-proof fiber, described bonding agent is one or both the combination in high-alumina cement and pure calcium aluminate cement, described bonding agent is high-alumina cement, or, described bonding agent is pure calcium aluminate cement, or, described bonding agent is the combination of high-alumina cement and pure calcium aluminate cement.
Embodiment three:
Silicon carbide electrofused mullite matter wear-resistant castable comprises following component and the mass percent of each component is: aggregate 58%, fine powder 15%, micro mist 15%, composite additive 6%, bonding agent 4%, heat-resistant steel fiber 2%, as preferably, mould material is only by aggregate, fine powder, micro mist, composite additive, bonding agent and heat-resistant steel fiber composition, wherein, a aggregate comprises the electrofused mullite aggregate 60% that granularity is 0.1-8mm, granularity is the carborundum aggregate 15% of 0.1-3mm, siliceous mullite brick aggregate 15%, alumine aggregate 10%, a fine powder comprises granularity≤180 object electrofused mullite fine powder 40%, granularity≤320 object siliceous mullite brick fine powder 40% and carbide fine powder 20%, described siliceous mullite brick aggregate and siliceous mullite brick fine powder are obtained by the discarded siliceous mullite brick fragmentation under cement rotary kiln changes when maintain and replace, described micro mist is the combination of fine silica powder and Reactive alumina, or, described micro mist is fine silica powder, the combination of Reactive alumina and modification electrofused mullite micro mist, the mass ratio of described Reactive alumina and fine silica powder is 2.3-2.5, described composite additive is the combination of tripoly phosphate sodium STPP and explosion-proof fiber, or, described composite additive is the combination of Sodium hexametaphosphate 99 and explosion-proof fiber, or, described composite additive is tripoly phosphate sodium STPP, the combination of Sodium hexametaphosphate 99 and explosion-proof fiber, described bonding agent is one or both the combination in high-alumina cement and pure calcium aluminate cement, described bonding agent is high-alumina cement, or, described bonding agent is pure calcium aluminate cement, or, described bonding agent is the combination of high-alumina cement and pure calcium aluminate cement.
Embodiment four:
Above-mentioned fine powder can be replaced by the fine powder comprising granularity≤180 object electrofused mullite fine powder, granularity≤320 object siliceous mullite brick fine powder, carbide fine powder and high alumina fine powder.
In a fine powder, the mass percent of granularity≤180 object electrofused mullite fine powder, granularity≤320 object siliceous mullite brick fine powder, carbide fine powder and high alumina fine powder is respectively: 25%, 50%, 20%, 5%, or 50%, 25%, 10%, 15%, or 40%, 35%, 15%, 10%.
Except above preferred embodiment, the present invention also has other embodiment, and those skilled in the art can make various change and distortion according to the present invention, only otherwise depart from spirit of the present invention, all should belong to the scope that claims of the present invention define.
Claims (2)
1. silicon carbide electrofused mullite matter wear-resistant castable, is characterized in that: the composed of the following components and mass percent of each component is: aggregate 50-65%, fine powder 10-20%, micro mist 5-20%, composite additive 3-10%, bonding agent 3-6%, heat-resistant steel fiber 1-2%, a aggregate comprises following component and the mass percent that each component accounts for this part of bone is: granularity is the electrofused mullite aggregate 50-70% of 0.1-8mm, granularity is the carborundum aggregate 10-20% of 0.1-3mm, siliceous mullite brick aggregate 10-20%, alumine aggregate 8-15%, a fine powder comprises following component and the mass percent of each component is: granularity≤180 object electrofused mullite fine powder 30-55%, granularity≤320 object siliceous mullite brick fine powder 30-55%, carbide fine powder 15-25%, described siliceous mullite brick aggregate and siliceous mullite brick fine powder are obtained by the discarded siliceous mullite brick fragmentation under cement rotary kiln changes when maintain and replace, described micro mist is the combination of fine silica powder and Reactive alumina, or, described micro mist is fine silica powder, the combination of Reactive alumina and modification electrofused mullite micro mist, the mass ratio of described Reactive alumina and fine silica powder is 2.3-2.5, described composite additive is the combination of tripoly phosphate sodium STPP and explosion-proof fiber, or, described composite additive is the combination of Sodium hexametaphosphate 99 and explosion-proof fiber, or, described composite additive is tripoly phosphate sodium STPP, the combination of Sodium hexametaphosphate 99 and explosion-proof fiber.
2. silicon carbide electrofused mullite matter wear-resistant castable according to claim 1, is characterized in that: described bonding agent is one or both the combination in high-alumina cement and pure calcium aluminate cement.
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| CN104230361A (en) * | 2014-09-23 | 2014-12-24 | 郑州瑞泰耐火科技有限公司 | High-temperature reinforcing agent for refractory materials and preparation method of high-temperature reinforcing agent |
| CN104355642B (en) * | 2014-12-01 | 2016-05-04 | 陈志渊 | A kind of 12000T cement kiln coal injection pipe dedicated pouring material |
| CN104725060B (en) * | 2015-03-16 | 2016-08-31 | 通达耐火技术股份有限公司 | A kind of secondary siliceous mullite brick is the high-strength refractory castable of aggregate |
| CN106045536A (en) * | 2016-06-08 | 2016-10-26 | 郑州市豫茂工贸有限公司 | Novel refractory block for flue wall of roasting furnace and preparation method of novel refractory block |
| CN106083102A (en) * | 2016-06-30 | 2016-11-09 | 张婷 | A kind of cement rotary kiln flashboard castable |
| CN106316420A (en) * | 2016-08-01 | 2017-01-11 | 张婷 | Smelter castable |
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| CN109608211A (en) * | 2018-12-21 | 2019-04-12 | 武汉钢铁集团耐火材料有限责任公司 | Hot-metal bottle aluminium silicon carbide castable and preparation method thereof |
| CN117645484A (en) * | 2019-12-03 | 2024-03-05 | 武汉兆融新材科技有限公司 | Silicon carbide ceramic and metal-skeleton-free integrated silicon carbide ceramic tertiary air flashboard and preparation method thereof |
| CN112608160B (en) * | 2020-12-31 | 2022-11-11 | 长兴兴鹰新型耐火建材有限公司 | High-strength wear-resistant castable special for cement kiln flashboard |
| CN113045322B (en) * | 2021-03-17 | 2022-09-06 | 北京金隅通达耐火技术有限公司 | High-thermal-conductivity wear-resistant castable prepared from secondary silicon mullite bricks |
| CN113354402B (en) * | 2021-06-25 | 2023-02-28 | 西安建筑科技大学 | Surface modification method of used cement kiln silicon mullite brick and iron runner castable |
| CN114315392B (en) * | 2022-01-17 | 2023-01-31 | 濮阳濮耐高温材料（集团）股份有限公司 | Fluid stirring purification jointed board preparation material and fluid stirring purification jointed board preparation process |
| CN114409418B (en) * | 2022-01-19 | 2023-02-07 | 宜兴市锅炉密封工程有限公司 | High-strength wear-resistant castable and preparation method and application thereof |
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