CN103396141A - Lightweight high-strength heat-insulation refractory castable - Google Patents
Lightweight high-strength heat-insulation refractory castable Download PDFInfo
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Abstract
The invention discloses a lightweight high-strength heat-insulation refractory castable. The castable comprises the following raw materials by weight: 30 to 40% of lightweight mullite aggregate, 5 to 10% of an aluminum-rich spinel hollow sphere, 5 to 8% of andalusite, 6 to 9% of aluminum-rich spinel powder, 5 to 7% of kyanite powder, 5 to 8% of silicon powder, 5 to 10% of rho-Al2O3 micro powder, 12 to 18% of calcium aluminate cement, 3 to 6% of a refractory fiber, 0.05 to 0.15% of sodium hexametaphosphate, 0.05 to 0.15% of an organic water reducing agent, 0.04 to 0.07% of an organosilicon coupling agent and 0.01 to 0.02% of a defoaming agent. According to the invention, the heat insulation performance of the lightweight refractory castable is guaranteed, close bonding between aggregate and powder in the refractory castable is improved, mechanical strength, capacity of resisting mechanical and thermal shock damage, anti-permeability and comprehensive usage performance at high temperature of the refractory castable are enhanced, and cost for the refractory castable is reduced, thereby finally achieving the comprehensive targets of reduction of heat loss in cooling of furnace beams and columns, prolongation of the service life of a heat insulation lining, improvement of heating quality in a furnace, reduction of energy consumption and maintenance cost, etc.
Description
Technical field
The invention belongs to fire resisting material field, specifically the high-strength light insulating refractory casting material of a kind of walking beam furnace water-cooled beam and the heat insulation use of water-cooled column.
Technical background
Stove beam and column are one of important structure of walking beam furnace, and it is not only bearing all wts of blank in stove, and undertaker's material stepped start-stop system important task of advancing, and therefore, guarantee that the mechanical strength under stove beam and column applying working condition condition is most important.in order to prevent strength decreased and distortion under stove beam and column applied at elevated temperature condition, need to carry out cooling to stove beam and column, the early stage type of cooling is that the water flowing open circuit is cooling, therefore claim again water-cooled beam and water-cooled column, because the water-cooled loss is large, in order effectively to utilize stove beam and the loss of column water-cooled, develop into gradually vaporization cooling, steam by the cooling generation of vaporizing is incorporated into the power networks, generating etc. is recycled, reduce the Enterprise Integrated energy consumption, domestic two kinds of types of cooling all have application at present, but the cooling temperature that reduces steel billet support heat-resistant bearer of stove beam, cause billet surface water-cooled " black printing ", worsen the heating condition of blank, extended heat-up time, reduced heating quality.in order to improve the heating steel billet quality, reduce the process furnace energy consumption, all adopt refractory materials to carry out heat insulation bundling to heating-furnace beam and column both at home and abroad, main heat shield liner structure has: the integrated poured structure of individual layer refractory castable, refractory castable and refractory fiber blanket bilayer structure and multi-layer refractory fibre blanket structure, wherein, individual layer refractory castable structure is poor because of heat-proof quality, the easy crystallization efflorescence of multi-layer refractory fibre blanket structure and not applying, especially the process furnace of the high temperature oriented silicon steel (HiB steel) of Heating temperature 〉=1380 ℃, can't use due to the restriction of commercially available refractory fibre product maximum operation (service) temperature.
state's internally heated oven all generally adopts refractory castable and refractory fiber blanket bilayer structure at present, especially high temperature oriented silicon steel (HiB steel) process furnace, wherein, internal layer is refractory fiber blanket, skin is refractory castable, strengthen the heat-proof quality of heat shield liner by the internal layer refractory fiber blanket, by outer mould material good resistance to elevated temperatures and mechanical property, improve the resisting breakage ability of heat shield liner, as: in September, 2010, Hu Jianping and brilliant army were in " economic research guide " upper disclose " water beam of walking beam heating furnace utilisation technology ", it has reported refractory fiber blanket and the mullite pouring material double thermal insulation lining structure of 120 tons of/hour two accumulation of heat walking beam furnace horizontal shores of certain steel mill and column, wherein, internal layer refractory fiber blanket thickness is 20mm, outer mould material thickness is 60mm.Publication number is that the Chinese invention patent of CN100494852C discloses " a kind of step heating furnace beam and post and constructional method thereof ", it provides tapetum fibrosum and mould material double thermal insulation lining structure and the constructional method thereof of a kind of step heating furnace beam and post, wherein, outer mould material thickness is 60mm, internal layer refractory fiber blanket thickness is 18 ~ 22mm, realize the combination of heat shield liner and water pipe by being welded on Y shape anchoring piece on water pipe, have advantages of that intensity is high, high temperature resistant, antioxidant property is good, long service life.Yet, in the production application process,, because outer mould material is thick, thermal conductivity is high, affected the integral heat insulation performance of heat shield liner, cause the water-cooled loss large, thermal efficiency of heating furnace is low; In addition, due to the high-temperature shrinkage of refractory fiber blanket and the thermal expansion of refractory castable, cause mould material skin and refractory fiber blanket layer bonding surface to form gap, the globality of heat shield liner and the stability of structure have been destroyed, easily make Y shape anchoring piece high temperature oxidation and the thermal shock be full of cracks of the refractory casting bed of material and structure spalling, not only affected the heat insulation and preservation effect of heating-furnace beam and column heat shield liner, and the stove beam and the column cooling heat loss high, be restricted work-ing life.
deficiency for above-mentioned compound heat-insulation lining structure, by the analysis to walking beam furnace stove beam and the requirement of column heat shield liner use properties, think that heat shield liner not only will have good heat-proof quality, anti-slag to infiltrate erosion performance, the erosion operation technique requirement that the heat insulation and iron scale that meets stove beam and column drops and causes, simultaneously, also enough mechanicals behavior under high temperature and volume stability need be arranged, meet the requirements such as heat shield liner high temperature resistance, anti-vibrating and impact, anti-thermal shock and structural integrity, for existing fire-resistant heat insulating material technology, Lowweight Refractory Castable is hopeful to achieve the above object most, but present Lowweight Refractory Castable ubiquity mechanical strength is low, fragility is large, it is poor that anti-slag infiltrates erosion performance, the low deficiency that waits of use temperature, as: publication number is: the Chinese invention patent of CN102161593B discloses " a kind of CSP furnace roller thermal insulation lining Lowweight Refractory Castable ", it provides a kind of refractory fibre to strengthen the light-weight mullite refractory castable, although mechanical property and thermal shock resistance are good, but it is not enough that the anti-slag infiltration is corroded with resistance to elevated temperatures, be difficult to meet the heat of walking beam furnace and the technical requirements that iron scale falls to corrode, although have the expert once to propose to adopt Lowweight Refractory Castable to carry out the wrapping of single layer structure heat shield liner, finally because of the technical limitation of Lowweight Refractory Castable, fail to implement, for this reason, be necessary further to carry out the research of walking beam furnace stove beam and column heat shield liner use novel heat-insulation refractory materials, improve thermal and insulating performance and the resisting breakage ability of stove beam and column refractory heat-insulating lining, reach reduction process furnace energy consumption, prolongation stove beam and column refractory heat-insulating and serve as a contrast work-ing life, reduce the integration objectives such as process furnace maintenance cost.
Summary of the invention
The object of the invention is to overcome above-mentioned weak point, a kind of high-strength light insulating refractory casting material is provided, it has been reached reduce stove beam and column cooling heat loss, prolong insulation lining work-ing life, improve the integration objectives such as heating quality in stove, reduction energy consumption and maintenance cost.
For achieving the above object, a kind of high-strength light insulating refractory casting material that the present invention is designed is characterized in that: its raw materials by weight meter comprises:
30 ~ 40% light-weight mullite aggregate, 5 ~ 10% aluminium riched spinel hollow ball, 5 ~ 8% andaluzite, 6 ~ 9% aluminium riched spinel powder, 5 ~ 7% aquamaine stone flour, 5 ~ 8% silicon powder, ρ-Al of 5 ~ 10%
2O
3Micro mist, 12 ~ 18% aluminous cement, 3 ~ 6% refractory fibre, 0.05 ~ 0.15% Sodium hexametaphosphate 99, organic water reducer of 0.05 ~ 0.15%, 0.04 ~ 0.07% organo-silicon coupling agent and 0.01 ~ 0.02% defoamer.
Further, the Al of described light-weight mullite aggregate
2O
3Content 〉=60%, 1 ~ 5mm packing density of particle≤1.0g/cm
3, be to form greater than 3mm and less than or equal to two kinds of grain compositions of 5mm and 1 ~ 3mm by granularity, its two kinds of particle level weight percents are respectively 0 ~ 80% and 20 ~ 100%.
Again further, described aluminium riched spinel hollow ball granularity is 3 ~ 0.2mm, tap density≤1.0g/cm
3, aluminium riched spinel Powder Particle Size≤0.044mm.
Again further, described andaluzite granularity is 0.1 ~ 1mm.
Again further, described aluminous cement is pure calcium aluminate cement.
Again further, described organic water reducer is that FS20 refractory castable water reducer, described silane coupling agent are that the granularity of soluble silane coupling agent, described aquamaine stone flour is 60 ~ 120 orders.
Above-mentioned high-strength light insulating refractory casting material is mixed by above-mentioned raw materials.
Advantage of the present invention is as follows:
1, the present invention, by the use that light-weight mullite aggregate and aluminium riched spinel hollow ball make up, has made up the deficiency less than 1mm aglite performance degradation, has avoided in the mould material having improved the thermal shock resistance of mould material less than the disappearance of 1mm grading of aggregate.
2, the present invention, by the application of high purity aluminium riched spinel hollow ball, has improved high-temperature behavior, heat-proof quality and the erosion-resisting characteristics of lightening casting material, meets the use properties requirement of heating furnace high-temperature heating; Improve anti-slag infiltration erosion performance and the high-temperature behavior of mould material.
3, defoamer in refractory castable of the present invention, contained the formation of bubble in colloidal materials when mould material adds the water stirring, improved the mobility of mould material, simultaneously, also contained the formation of bubble on colloidal materials and aglite hole wall, improved colloidal materials in the intrapore depth of penetration of aglite, expanded the bonding interface between aggregate and colloidal materials in the mould material, realize the sealing of aglite open pores by the gel of colloidal materials, contained aglite crack and the open pore disadvantageous effect to the aggregate mechanical property, improved mullite lightweight aggregate, the interface bonding state of aluminium riched spinel hollow ball, improved the mechanical property of aglite and mould material.
4, the soluble silane coupling agent that adds of refractory castable of the present invention, for polyether-modified Ethoxysilane, can be soluble in water with arbitrary proportion, because of the activated oxyethyl group of this soluble silane coupling agent tool functional group, further improve the interface bonding state between aglite, aluminium riched spinel hollow ball and colloidal materials, thereby improved the whole bonding strength of mould material.
5, add the aluminum oxide refractory fibre in refractory castable of the present invention, the crystallization efflorescence of refractory fibre under hot conditions and the disadvantageous effect of shrinking the mould material performance have been contained, under the acting in conjunction of defoamer and the active oxyethyl group functional group of soluble silane coupling agent, interface combination and the dispersion state in mould material thereof of refractory fibre have been improved, enhancing and toughening effect and the aggregate of refractory fibre have been promoted, combining closely of powder, resisting breakage ability and the impermeabilisation ability of mould material have been strengthened, improved the anti-mechanical vibration ability of mould material, toughness, with thermal shock resistance, be the high-temperature expansion of 60 ~ 120 order aquamaine stone flours by the granularity that adds, made up the lightening casting material high temperature sintering and shunk, improved the high volume stability of mould material, improved the globality of heat shield liner,
6, contain Secar-71 Lafarge pure calcium aluminate cement, silicon powder and α-Al in refractory castable of the present invention
2O
3Micro mist, by aquation combination, silicon powder and the ρ-Al of Secar-71 Lafarge pure calcium aluminate cement
2O
3The gel combination of micro mist, improved the normal temperature of mould material, middle temperature and high temperature bond intensity effectively, reduces the formation of low melting point under foreign matter content and working conditions thereof, meets the use properties demand of working under stove beam and column heat shield liner bad working environments condition; The compound use of Sodium hexametaphosphate 99 and the organic water reducer of FS20, improved the construction mobility of mould material, reduced the amount of water of mould material, improved furnace roller pouring heat insulating lining construction quality and over-all properties.
By above-mentioned aggregate measures and the common commercially available starting material of employing, guaranteed the heat-proof quality of lightening casting material, strengthened combining closely of aggregate, powder in the mould material, the damaged ability of the mechanical strength of mould material, anti-machinery and thermal shock, anti-permeability performance and high temperature Integrated using performance have been increased substantially, reduced the mould material cost, finally reached and reduce stove beam and column cooling heat loss, prolong insulation lining work-ing life, improve the integration objectives such as heating quality in stove, reduction energy consumption and maintenance cost.
Embodiment
Below in conjunction with specific embodiment, method of the present invention is described in further detail.
Embodiment 1
A kind of high-strength light insulating refractory casting material, its raw materials by weight meter comprises:
40% light-weight mullite aggregate, 5% aluminium riched spinel hollow ball, 8% andaluzite, 6% aluminium riched spinel powder, 7% aquamaine stone flour, 7.71% silicon powder, ρ-Al of 5%
2O
3Micro mist, 18% pure calcium aluminate cement, 3% refractory fibre, 0.15% Sodium hexametaphosphate 99,0.05% FS20 refractory castable water reducer, 0.07% water-soluble WD-10 silane coupling agent and 0.02% defoamer.
Wherein, the Al of described light-weight mullite aggregate
2O
3Content 〉=60%, 1 ~ 5mm packing density of particle≤1.0g/cm
3, be that 1 ~ 3mm grain composition forms by granularity, described aluminium riched spinel hollow ball granularity is 3 ~ 0.2mm, tap density≤1.0g/cm
3, aluminium riched spinel Powder Particle Size≤0.044mm; Described andaluzite granularity is 0.1 ~ 1mm; The granularity of described aquamaine stone flour is 60 ~ 120 orders.
Embodiment 2
A kind of high-strength light insulating refractory casting material, its raw materials by weight meter comprises:
35% light-weight mullite aggregate, 10% aluminium riched spinel hollow ball, 5% andaluzite, 8.75% aluminium riched spinel powder, 5% aquamaine stone flour, 8% silicon powder, ρ-Al of 10%
2O
3Micro mist, 12% pure calcium aluminate cement, 6% refractory fibre, 0.05% Sodium hexametaphosphate 99,0.15% FS20 refractory castable water reducer, 0.04% water-soluble WD-10 silane coupling agent and 0.01% defoamer.
Wherein, the Al of described light-weight mullite aggregate
2O
3Content 〉=60%, 1 ~ 5mm packing density of particle≤1.0g/cm
3, be to form greater than 3mm and less than or equal to two kinds of grain compositions of 5mm and 1 ~ 3mm by granularity, its two kinds of particle level weight percents are respectively 25% and 75%; Described aluminium riched spinel hollow ball granularity is 3 ~ 0.2mm, tap density≤1.0g/cm
3, aluminium riched spinel Powder Particle Size≤0.044mm; Described andaluzite granularity is 0.1 ~ 1mm; The granularity of described aquamaine stone flour is 60 ~ 120 orders.
Embodiment 3
A kind of high-strength light insulating refractory casting material, its raw materials by weight meter comprises:
35% light-weight mullite aggregate, 10% aluminium riched spinel hollow ball, 8% andaluzite, 5% aluminium riched spinel powder, 6% aquamaine stone flour, 7% silicon powder, ρ-Al of 8%
2O
3Micro mist, 16% pure calcium aluminate cement, 4.74% refractory fibre, 0.1% Sodium hexametaphosphate 99,0.1% FS20 refractory castable water reducer, 0.045% water-soluble WD-10 silane coupling agent and 0.015% defoamer.
Wherein, the Al of described light-weight mullite aggregate
2O
3Content 〉=60%, 1 ~ 5mm packing density of particle≤1.0g/cm
3, be to form greater than 3mm and less than or equal to two kinds of grain compositions of 5mm and 1 ~ 3mm by granularity, its two kinds of particle level weight percents are respectively 80% and 20%; Described aluminium riched spinel hollow ball granularity is 3 ~ 0.2mm, tap density≤1.0g/cm
3, aluminium riched spinel Powder Particle Size≤0.044mm; Described andaluzite granularity is 0.1 ~ 1mm; The granularity of described aquamaine stone flour is 60 ~ 120 orders.
Embodiment 4
A kind of high-strength light insulating refractory casting material, its raw materials by weight meter comprises:
30% light-weight mullite aggregate, 6.79% aluminium riched spinel hollow ball, 8% andaluzite, 9% aluminium riched spinel powder, 7% aquamaine stone flour, 5% silicon powder, ρ-Al of 10%
2O
3Micro mist, 18% pure calcium aluminate cement, 6% refractory fibre, 0.05% Sodium hexametaphosphate 99,0.1% FS20 refractory castable water reducer, 0.05% water-soluble WD-10 silane coupling agent and 0.01% defoamer.
Wherein, the Al of described light-weight mullite aggregate
2O
3Content 〉=60%, 1 ~ 5mm packing density of particle≤1.0g/cm
3, be to form greater than 3mm and less than or equal to two kinds of grain compositions of 5mm and 1 ~ 3mm by granularity, its two kinds of particle level weight percents are respectively 50% and 50%; Described aluminium riched spinel hollow ball granularity is 3 ~ 0.2mm, tap density≤1.0g/cm
3, aluminium riched spinel Powder Particle Size≤0.044mm; Described andaluzite granularity is 0.1 ~ 1mm; The granularity of described aquamaine stone flour is 60 ~ 120 orders.
The effluent of light-weight mullite aggregate described in above-described embodiment 1 ~ 4 south Yanshi Guangming High-Tech Refractory Products Co., ltd. produces; Described aluminium riched spinel hollow ball is produced by source, Zhengzhou triumphant novel material company limited; Described andaluzite is produced by English lattice porcelain benefit grand andaluzite (Xinjiang) company limited; Described ρ-Al
2O
3Micro mist is that Zibo Lei Pu stupalith company limited produces; Described pure calcium aluminate cement is by the anti-Secar-71 Lafarge pure calcium aluminate cement that grinds the supply of industry and trade company limited in Luoyang.Described refractory fibre is the supply of aluminum oxide refractory fibre Zhuzhou HanWang Science Co., Ltd, and is processed into the staple fibre that length is 5 ~ 10mm.The German BASF FS20 refractory castable water reducer that described organic water reducer provides for the Wuhan commission merchant.Described silane coupling agent is the water-soluble WD-10 silane coupling agent that Wuhan temmoku development in science and technology limited liability company produces.Described defoamer is the alkaline-resisting defoamer of WL-21 organosilicon or the commercially available tributyl phosphate that Wuhan City Caidian District Association for the Handicapped chemical plant produces.Described aquamaine stone flour is that Henan Province Tongbai Shan Mountain kyanite mining industry company limited produces.
Above-mentioned high-strength light insulating refractory casting material is mixed by above-mentioned raw materials.High-strength light insulating refractory casting material weight percent according to embodiment 1 ~ 4 forms, prepared respectively the high-strength light insulating refractory casting material, and carried out the preparation of 40 * 40 * 160 samples, detect the volume density≤1.55g/cm of each sample after maintenance and thermal treatment
3Ultimate compression strength 〉=25MPa after 1450 ℃ * 3h burns, thermal conductivity (800 ℃)≤0.35W/m ℃, the life-time service temperature can reach 1450 ℃, correlated performance obviously is better than the same density of related data report, with material lightening casting material performance index, can meet the use properties requirement of walking beam furnace stove beam and column individual layer heat shield liner structure, also can meet the use properties requirement of metallurgy, petroleum chemical heating furnace fire proof material of furnace lining.
Claims (6)
1. high-strength light insulating refractory casting material, it is characterized in that: its raw materials by weight meter comprises:
30 ~ 40% light-weight mullite aggregate, 5 ~ 10% aluminium riched spinel hollow ball, 5 ~ 8% andaluzite, 6 ~ 9% aluminium riched spinel powder, 5 ~ 7% aquamaine stone flour, 5 ~ 8% silicon powder, ρ-Al of 5 ~ 10%
2O
3Micro mist, 12 ~ 18% aluminous cement, 3 ~ 6% refractory fibre, 0.05 ~ 0.15% Sodium hexametaphosphate 99, organic water reducer of 0.05 ~ 0.15%, 0.04 ~ 0.07% organo-silicon coupling agent and 0.01 ~ 0.02% defoamer.
2. high-strength light insulating refractory casting material according to claim 1, is characterized in that: the Al of described light-weight mullite aggregate
2O
3Content 〉=60%, 1 ~ 5mm packing density of particle≤1.0g/cm
3, be to form greater than 3mm and less than or equal to two kinds of grain compositions of 5mm and 1 ~ 3mm by granularity, its two kinds of particle level weight percents are respectively 0 ~ 80% and 20 ~ 100%.
3. high-strength light insulating refractory casting material according to claim 1, it is characterized in that: described aluminium riched spinel hollow ball granularity is 3 ~ 0.2mm, tap density≤1.0g/cm
3, aluminium riched spinel Powder Particle Size≤0.044mm.
4. high-strength light insulating refractory casting material according to claim 1, it is characterized in that: described andaluzite granularity is 0.1 ~ 1mm.
5. high-strength light insulating refractory casting material according to claim 1, it is characterized in that: described aluminous cement is pure calcium aluminate cement.
6. high-strength light insulating refractory casting material according to claim 1 is characterized in that: described organic water reducer is that FS20 refractory castable water reducer, described silane coupling agent are that the granularity of soluble silane coupling agent, described aquamaine stone flour is 60 ~ 120 orders.
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| CN105294124A (en) * | 2015-10-26 | 2016-02-03 | 丁芬 | High-strength self-flow castable and construction method thereof |
| CN107344859A (en) * | 2017-06-20 | 2017-11-14 | 长兴兴鹰新型耐火建材有限公司 | A kind of Midst density high alumina silicon carbide castable and preparation method thereof |
| CN108110706A (en) * | 2017-12-22 | 2018-06-01 | 江苏华强电力设备有限公司 | Fire resisting waterproof and anticorrosion solid bus slot |
| CN109987952A (en) * | 2019-04-25 | 2019-07-09 | 郑州振东科技有限公司 | Spinel ladle heat insulation lining brick |
| CN110256090A (en) * | 2019-06-24 | 2019-09-20 | 武汉钢铁有限公司 | A kind of tundish permanent layer lightweight insulated pouring material |
| CN111592366A (en) * | 2020-04-28 | 2020-08-28 | 河南九环实业发展有限公司 | Environment-friendly multi-element nano wear-resistant corrosion-resistant vitrified lining material |
| CN111704473A (en) * | 2020-06-27 | 2020-09-25 | 中国电建集团山东电力建设第一工程有限公司 | Heat-preservation refractory castable and preparation method, pouring method and application thereof |
| CN112280343A (en) * | 2020-11-10 | 2021-01-29 | 山东鲁阳节能材料股份有限公司 | High-temperature nano composite coating, preparation method thereof and small-bag flexible package coating |
| CN113135745A (en) * | 2021-03-24 | 2021-07-20 | 无锡尚臻新材料有限公司 | Casting molding process for light mullite-spinel hollow sphere sagger |
| CN113149620A (en) * | 2021-03-24 | 2021-07-23 | 无锡尚臻新材料有限公司 | Light mullite-spinel hollow sphere sagger pressurization forming process |
| CN113636831A (en) * | 2021-09-15 | 2021-11-12 | 武汉钢铁有限公司 | Quick-drying hollow sphere heat-insulation refractory castable |
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| CN116730732A (en) * | 2023-07-17 | 2023-09-12 | 中钢集团洛阳耐火材料研究院有限公司 | Low-pollution long nozzle body material |
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| CN105294124A (en) * | 2015-10-26 | 2016-02-03 | 丁芬 | High-strength self-flow castable and construction method thereof |
| CN107344859A (en) * | 2017-06-20 | 2017-11-14 | 长兴兴鹰新型耐火建材有限公司 | A kind of Midst density high alumina silicon carbide castable and preparation method thereof |
| CN107344859B (en) * | 2017-06-20 | 2019-09-06 | 长兴兴鹰新型耐火建材有限公司 | A kind of middle density high alumina silicon carbide castable and preparation method thereof |
| CN108110706A (en) * | 2017-12-22 | 2018-06-01 | 江苏华强电力设备有限公司 | Fire resisting waterproof and anticorrosion solid bus slot |
| CN109987952A (en) * | 2019-04-25 | 2019-07-09 | 郑州振东科技有限公司 | Spinel ladle heat insulation lining brick |
| CN110256090A (en) * | 2019-06-24 | 2019-09-20 | 武汉钢铁有限公司 | A kind of tundish permanent layer lightweight insulated pouring material |
| CN111592366A (en) * | 2020-04-28 | 2020-08-28 | 河南九环实业发展有限公司 | Environment-friendly multi-element nano wear-resistant corrosion-resistant vitrified lining material |
| CN111704473A (en) * | 2020-06-27 | 2020-09-25 | 中国电建集团山东电力建设第一工程有限公司 | Heat-preservation refractory castable and preparation method, pouring method and application thereof |
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