CN105645936A - High-aluminum hollow sphere light-weight castable and preparation method thereof - Google Patents

High-aluminum hollow sphere light-weight castable and preparation method thereof Download PDF

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CN105645936A
CN105645936A CN201610014442.0A CN201610014442A CN105645936A CN 105645936 A CN105645936 A CN 105645936A CN 201610014442 A CN201610014442 A CN 201610014442A CN 105645936 A CN105645936 A CN 105645936A
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high alumina
preparation
granularity
bubble lightweight
lightweight castable
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CN105645936B (en
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聂建华
徐超
蔡曼菲
梁永和
阮国智
邱文冬
李晨晨
张寒
尹玉成
张国锬
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Wuhan University of Science and Engineering WUSE
Wuhan University of Science and Technology WHUST
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Abstract

The invention relates to a high-aluminum hollow sphere light-weight castable and a preparation method thereof. The technical scheme is as follows: the preparation method comprises the following steps: by using 28-48 wt% of high-aluminum hollow sphere, 14-30 wt% of flint clay, 6-30 wt% of alumina fine powder, 6-10 wt% of aluminum oxide micropowder, 1-5 wt% of silicon dioxide micropowder, 2-10 wt% of calcium aluminate cement and 1-5 wt% of Gangxi clay as raw materials, adding sodium tripolyphosphate (accounting for 0.04-0.2 wt% of the raw materials) and sodium hexametaphosphate (accounting for 0.1-0.5 wt% of the raw materials), carrying out dry mixing for 1-3 minutes, adding water (accounting for 7-15 wt% of the raw materials), and mixing for 2-5 minutes to obtain the high-aluminum hollow sphere light-weight castable. The preparation method has the characteristics of simple technique, low production cost and no special requirements for equipment. The high-aluminum hollow sphere light-weight castable has the advantages of low volume density, low thermal conductivity, high compressive strength, low reheating linear change rate, favorable volume stability and favorable thermal-insulation effect, and is suitable for a ladle permanent layer.

Description

A kind of high alumina bubble lightweight castable and preparation method thereof
Technical field
The invention belongs to lightening casting material technical field. It is specifically related to a kind of high alumina bubble lightweight castable and preparation method thereof.
Background technology
Today of and new forms of energy slower development day by day exhausted at traditional energy, for human kind sustainable development, exploitation lightweight, high-strength, good thermal shock stability, use temperature high, lightweight construction superhigh temperature kiln can be met needed for inner lining material be current the most urgent task. Ladle is the Thermal Equipment that steel mill is important, development along with steel-smelting technology, smelting temperature improves and continuous casting ratio increases, molten steel is extended residence time in ladle, especially ladle liner is required increasingly harsher by external refining LF, RH technique, ladle liner material, safeguards that construction technology also needs to update, and makes great efforts to reduce refractory consumption rate and cost, improve ladle hot state, meet refine and continuous casting process requirement is the ladle Main Trends of The Development with resistance to material.
Large ladle furnace permanent layer, owing to considering from ladle security standpoint, is generally adopted high alumina castable, high-alumina brick or pyzophillite brick. Using agalmatolite brick and high-alumina brick, brickwork joint is more, and safety is difficult to ensure; High alumina castable heat-insulating property is poor, the heat insulation effect of permanent layer does not give full play to, and safety is poor, working lining materials dare not be continuing with when using certain residual thickness, and (the domestic magnalium preformed bricks residual thickness that rolls off the production line is typically in 60 ~ 80mm, and the residual thickness of Japan controls at about 40mm), it is cause ladle to consume the major reason that resistance to material is high that working layer can not fully use. Therefore to guarantee safety, it is necessary to exploitation have high intensity, low heat conduction Novel pouring material to substitute high alumina castable.
At present, much novel heat-barrier material has been found out and has been applied in permanent layer or the working lining of various high temperature kiln, although utilizing the castable that these novel heat insulation materials are prepared to have the heat-proof quality of excellence, but its intensity does not often reach standard, limit the range of application of this material. Zhang Guodong et al. adopts alumina hollow ball and ��-Al2O3Micropowder is that raw material is prepared for low cement combined aluminum oxide bubble lightweight castable, refractoriness under load is up to 1600 DEG C, rupture strength also reaches 8.0MPa, but its thermal conductivity and intensity still have much room for improvement (research [J] of low cement combined aluminum oxide bubble lightweight castable. fire-resistant with Calx .2009,34 (5)).The patented technology of " a kind of preparation method preparing light-high-strength alumina hollow ball pottery " (CN1554616A), with ��-Al2O3Micropowder and alumina hollow ball are raw material, and with phosphoric acid solution for bonding agent, the Insulating Firebircks JM bulk density of preparation is relatively low, is 1.2 ~ 1.4g/cm3, rupture strength and compressive resistance are relatively big, respectively 5 ~ 12MPa and 10 ~ 30MPa, but this method is only with alumina hollow ball and ��-Al2O3Micropowder is raw material, is at high temperature difficult to sinter, it is necessary to higher temperature burns till, relatively costly, and its thermal conductivity is higher. The patented technology of " preparation method of a kind of hollow alumina ball thermal insulation refractory material " (CN102491761A), though prepared hollow alumina ball thermal insulation refractory material good in thermal shock, bulk density is low and thermal conductivity is low, but compressive resistance reduces, only have 7 ~ 14MPa.
Summary of the invention
It is contemplated that overcome prior art defect, it is therefore an objective to provide that a kind of technique is simple, production cost is low and to the equipment preparation method without the high alumina bubble lightweight castable of particular/special requirement; The high alumina bubble lightweight castable bulk density prepared by the method is low, thermal conductivity is low, compressive resistance is high, reheating linear change rate on reheating is low, volume stability is good and heat insulation and preservation effect is good, it is adaptable to permanent ladle layer.
For achieving the above object, the technical solution used in the present invention is: with the Guangxi clay of the high alumina hollow ball of 28 ~ 48wt%, the flint clay of 14 ~ 30wt%, the Alumina fine powder of 6 ~ 30wt%, the alumina powder of 6 ~ 10wt%, the fine silica powder of 1 ~ 5wt%, the aluminous cement of 2 ~ 10wt% and 1 ~ 5wt% for raw material, the sodium tripolyphosphate of additional described raw material 0.04 ~ 0.2wt% and the sodium hexameta phosphate of 0.1 ~ 0.5wt%, it is dry mixed 1 ~ 3min, the water of 7 ~ 15wt% of additional described raw material again, mixing 2 ~ 5min, obtains high alumina bubble lightweight castable.
The main chemical compositions of described high alumina hollow ball is: Al2O3It is 55 ~ 65wt%, SiO2It is 25 ~ 35wt%; The grain composition of high alumina hollow ball is: granularity is 10 ~ 20wt% less than 8mm and the granule more than or equal to 5mm, and granularity is 30 ~ 50wt% less than 5mm and the granule more than or equal to 3mm, and granularity is 30 ~ 60wt% less than 3mm and the granule more than or equal to 1mm.
The main chemical compositions of described flint clay is: Al2O3It is 40 ~ 50wt%, SiO2It is 40 ~ 60wt%, Fe2O3It is 1 ~ 3wt%; The grain composition of flint clay is: granularity is 50 ~ 60wt% less than 1mm and the granule more than or equal to 0.5mm, and granularity is 40 ~ 50wt% less than 0.5mm and the granule more than or equal to 0.074mm.
The Al of described Alumina fine powder2O3Content >=88wt%, granularity��0.088mm.
The Al of described alumina powder2O3Content >=98wt%, granularity��3 ��m.
The SiO of described fine silica powder2Content >=95wt%, granularity��3 ��m.
The Al of described aluminous cement2O3Content >=71wt%, CaO content��30wt%, granularity��3 ��m.
The SiO of described Guangxi clay2Content >=40wt%, Al2O3�� 40wt%, granularity is��3 ��m.
The Na of described sodium tripolyphosphate5P3O10Content >=98wt%, granularity��1mm.
The Na of described sodium hexameta phosphate6P6O18Content >=98wt%, granularity��1mm.
Owing to adopting technique scheme, the present invention compared with prior art has following good effect:
The high alumina hollow ball that the present invention adopts has hollow structure, and bulk density is low, intensity is little compared with high and after heat treatment change in volume; There is substantial amounts of mullite to generate in the high alumina hollow ball spherical shell of high-temperature process, further increase the intensity of material.High alumina hollow ball is used to have relatively low bulk density and higher apparent porosity as lightening casting material prepared by aggregate, it is ensured that high alumina bubble lightweight castable has the heat preservation and insulation of excellence; Due to the agglomeration under the proportioning of suitable aggregate and fine powder and high temperature, high alumina bubble lightweight castable also has higher strength at normal temperature and cold crushing strength, and permanent line rate of change is little.
High alumina bubble lightweight castable prepared by the present invention, when 110 DEG C �� 24h and 1300 DEG C �� 3h through detection after heat treatment: bulk density is 1.82 ~ 2.00g/cm3With 1.81 ~ 1.98g/cm3; Apparent porosity is 33 ~ 37% and 35 ~ 39%; Strength at normal temperature is 2 ~ 6MPa and 9 ~ 12MPa; Cold crushing strength is 17 ~ 29MPa and 36 ~ 51MPa. Prepared high alumina bubble lightweight castable, when 1300 DEG C �� 3h, the permanent line rate of change after heat treatment is that after-0.13 ~-0.18,1300 DEG C �� 3h heat treatment, the heat conductivity under 500 DEG C of conditions is 0.51 ~ 0.60W (m K)-1��
Therefore, the present invention has that technique is simple, production cost is low and to the equipment feature without particular/special requirement; Prepared high alumina bubble lightweight castable bulk density is low, thermal conductivity is low, compressive resistance is high, reheating linear change rate on reheating is low, volume stability is good and heat insulation and preservation effect is good, it is adaptable to permanent ladle layer.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the invention will be further described, not the restriction to its protection domain.
For avoiding repeating, first by as follows for raw material Unify legislation involved in this detailed description of the invention, embodiment repeats no more:
The main chemical compositions of described high alumina hollow ball is: Al2O3It is 55 ~ 65wt%, SiO2It is 25 ~ 35wt%; The grain composition of high alumina hollow ball is: granularity is 10 ~ 20wt% less than 8mm and the granule more than or equal to 5mm, and granularity is 30 ~ 50wt% less than 5mm and the granule more than or equal to 3mm, and granularity is 30 ~ 60wt% less than 3mm and the granule more than or equal to 1mm.
The main chemical compositions of described flint clay is: Al2O3It is 40 ~ 50wt%, SiO2It is 40 ~ 60wt%, Fe2O3It is 1 ~ 3wt%; The grain composition of flint clay is: granularity is 50 ~ 60wt% less than 1mm and the granule more than or equal to 0.5mm, and granularity is 40 ~ 50wt% less than 0.5mm and the granule more than or equal to 0.074mm.
The Al of described Alumina fine powder2O3Content >=88wt%, granularity��0.088mm.
The Al of described alumina powder2O3Content >=98wt%, granularity��3 ��m.
The SiO of described fine silica powder2Content >=95wt%, granularity��3 ��m.
The Al of described aluminous cement2O3Content >=71wt%, CaO content��30wt%, granularity��3 ��m.
The SiO of described Guangxi clay2Content >=40wt%, Al2O3�� 40wt%, granularity is��3 ��m.
The Na of described sodium tripolyphosphate5P3O10Content >=98wt%, granularity��1mm.
The Na of described sodium hexameta phosphate6P6O18Content >=98wt%, granularity��1mm.
Embodiment 1
A kind of high alumina bubble lightweight castable and preparation method thereof. With the Guangxi clay of the high alumina hollow ball of 28 ~ 33wt%, the flint clay of 18 ~ 22wt%, the Alumina fine powder of 24 ~ 30wt%, the alumina powder of 8 ~ 9wt%, the fine silica powder of 4 ~ 5wt%, the aluminous cement of 2 ~ 4wt% and 2 ~ 3wt% for raw material, the sodium tripolyphosphate of additional described raw material 0.04 ~ 0.08wt% and the sodium hexameta phosphate of 0.1 ~ 0.2wt%, it is dry mixed 1 ~ 3min, the water of 7 ~ 9wt% of additional described raw material again, mixing 2 ~ 5min, obtains high alumina bubble lightweight castable.
High alumina bubble lightweight castable prepared by the present embodiment, when 110 DEG C �� 24h and 1300 DEG C �� 3h through detection after heat treatment: bulk density is 1.90 ~ 2.00g/cm3With 1.90 ~ 1.98g/cm3; Apparent porosity is 33 ~ 34% and 35 ~ 37%; Strength at normal temperature is 3 ~ 5MPa and 10 ~ 12MPa; Cold crushing strength is 17 ~ 19MPa and 48 ~ 51MPa; Prepared high alumina bubble lightweight castable, when 1300 DEG C �� 3h, the permanent line rate of change after heat treatment is-0.14 ~-0.16; After 1300 DEG C �� 3h heat treatment, the heat conductivity under 500 DEG C of conditions is 0.55 ~ 0.60W (m K)-1��
Embodiment 2
A kind of high alumina bubble lightweight castable and preparation method thereof. With the Guangxi clay of the high alumina hollow ball of 33 ~ 38wt%, the flint clay of 22 ~ 26wt%, the Alumina fine powder of 18 ~ 24wt%, the alumina powder of 9 ~ 10wt%, the fine silica powder of 1 ~ 2wt%, the aluminous cement of 8 ~ 10wt% and 3 ~ 4wt% for raw material, the sodium tripolyphosphate of additional described raw material 0.08 ~ 0.12wt% and the sodium hexameta phosphate of 0.2 ~ 0.3wt%, it is dry mixed 1 ~ 3min, the water of 9 ~ 11wt% of additional described raw material again, mixing 2 ~ 5min, obtains high alumina bubble lightweight castable.
High alumina bubble lightweight castable prepared by the present embodiment, when 110 DEG C �� 24h and 1300 DEG C �� 3h through detection after heat treatment: bulk density is 1.90 ~ 1.96g/cm3With 1.89 ~ 1.93g/cm3; Apparent porosity is 33 ~ 34% and 36 ~ 38%; Strength at normal temperature is 2 ~ 4MPa and 10 ~ 11MPa; Cold crushing strength is 20 ~ 22MPa and 46 ~ 48MPa; Prepared high alumina bubble lightweight castable, when 1300 DEG C �� 3h, the permanent line rate of change after heat treatment is-0.16 ~-0.18; After 1300 DEG C �� 3h heat treatment, the heat conductivity under 500 DEG C of conditions is 0.54 ~ 0.58W (m K)-1��
Embodiment 3
A kind of high alumina bubble lightweight castable and preparation method thereof. With the Guangxi clay of the high alumina hollow ball of 38 ~ 43wt%, the flint clay of 26 ~ 30wt%, the Alumina fine powder of 6 ~ 12wt%, the alumina powder of 6 ~ 7wt%, the fine silica powder of 2 ~ 3wt%, the aluminous cement of 4 ~ 6wt% and 4 ~ 5wt% for raw material, the sodium tripolyphosphate of additional described raw material 0.12 ~ 0.16wt% and the sodium hexameta phosphate of 0.3 ~ 0.4wt%, it is dry mixed 1 ~ 3min, the water of 11 ~ 13wt% of additional described raw material again, mixing 2 ~ 5min, obtains high alumina bubble lightweight castable.
High alumina bubble lightweight castable prepared by the present embodiment, when 110 DEG C �� 24h and 1300 DEG C �� 3h through detection after heat treatment: bulk density is 1.89 ~ 1.94g/cm3With 1.84 ~ 1.90g/cm3; Apparent porosity is 34 ~ 35% and 37 ~ 38%; Strength at normal temperature is 5 ~ 6MPa and 9 ~ 10MPa; Cold crushing strength is 27 ~ 29MPa and 41 ~ 43MPa; Prepared high alumina bubble lightweight castable, when 1300 DEG C �� 3h, the permanent line rate of change after heat treatment is-0.14 ~-0.16; After 1300 DEG C �� 3h heat treatment, the heat conductivity under 500 DEG C of conditions is 0.52 ~ 0.55W (m K)-1��
Embodiment 4
A kind of high alumina bubble lightweight castable and preparation method thereof. With the Guangxi clay of the high alumina hollow ball of 43 ~ 48wt%, the Alumina fine powder of the flint clay 12 ~ 18wt% of 14 ~ 18wt%, the alumina powder of 7 ~ 8wt%, the fine silica powder of 3 ~ 4wt%, the aluminous cement of 6 ~ 8wt% and 1 ~ 2wt% for raw material, the sodium tripolyphosphate of additional described raw material 0.16 ~ 0.20wt% and the sodium hexameta phosphate of 0.4 ~ 0.5wt%, it is dry mixed 1 ~ 3min, the water of 13 ~ 15wt% of additional described raw material again, mixing 2 ~ 5min, obtains high alumina bubble lightweight castable.
High alumina bubble lightweight castable prepared by the present embodiment, when 110 DEG C �� 24h and 1300 DEG C �� 3h through detection after heat treatment: bulk density is 1.82 ~ 1.87g/cm3With 1.81 ~ 1.85g/cm3; Apparent porosity is 35 ~ 37% and 38 ~ 39%; Strength at normal temperature is 4 ~ 5MPa and 9 ~ 10MPa; Cold crushing strength is 22 ~ 24MPa and 36 ~ 38MPa; Prepared high alumina bubble lightweight castable, when 1300 DEG C �� 3h, the permanent line rate of change after heat treatment is-0.13 ~-0.15; After 1300 DEG C �� 3h heat treatment, the heat conductivity under 500 DEG C of conditions is 0.51 ~ 0.53W (m K)-1��
The high alumina hollow ball that this detailed description of the invention adopts has hollow structure, and bulk density is low, intensity is little compared with high and after heat treatment change in volume; There is substantial amounts of mullite to generate in the high alumina hollow ball spherical shell of high-temperature process, further increase the intensity of material. High alumina hollow ball is used to have relatively low bulk density and higher apparent porosity as lightening casting material prepared by aggregate, it is ensured that high alumina bubble lightweight castable has the heat preservation and insulation of excellence; Due to the agglomeration under the proportioning of suitable aggregate and fine powder and high temperature, high alumina bubble lightweight castable also has higher strength at normal temperature and cold crushing strength, and permanent line rate of change is little.
High alumina bubble lightweight castable prepared by this detailed description of the invention, when 110 DEG C �� 24h and 1300 DEG C �� 3h through detection after heat treatment: bulk density is 1.82 ~ 2.00g/cm3With 1.81 ~ 1.98g/cm3; Apparent porosity is 33 ~ 37% and 35 ~ 39%; Strength at normal temperature is 2 ~ 6MPa and 9 ~ 12MPa; Cold crushing strength is 17 ~ 29MPa and 36 ~ 51MPa. Prepared high alumina bubble lightweight castable, when 1300 DEG C �� 3h, the permanent line rate of change after heat treatment is that after-0.13 ~-0.18,1300 DEG C �� 3h heat treatment, the heat conductivity under 500 DEG C of conditions is 0.51 ~ 0.60W (m K)-1��
Therefore, this detailed description of the invention has that technique is simple, production cost is low and to the equipment feature without particular/special requirement; Prepared high alumina bubble lightweight castable bulk density is low, thermal conductivity is low, compressive resistance is high, reheating linear change rate on reheating is low, volume stability is good and heat insulation and preservation effect is good, it is adaptable to permanent ladle layer.

Claims (9)

1. the preparation method of a high alumina bubble lightweight castable, it is characterized in that described preparation method is: with the high alumina hollow ball of 28 ~ 48wt%, the flint clay of 14 ~ 30wt%, the Alumina fine powder of 6 ~ 30wt%, the alumina powder of 6 ~ 10wt%, the fine silica powder of 1 ~ 5wt%, the aluminous cement of 2 ~ 10wt% and the Guangxi clay of 1 ~ 5wt% are raw material, the sodium tripolyphosphate of additional described raw material 0.04 ~ 0.2wt% and the sodium hexameta phosphate of 0.1 ~ 0.5wt%, it is dry mixed 1 ~ 3min, the water of 7 ~ 15wt% of additional described raw material again, mixing 2 ~ 5min, obtain high alumina bubble lightweight castable,
The main chemical compositions of described high alumina hollow ball is: Al2O3It is 55 ~ 65wt%, SiO2It is 25 ~ 35wt%; The grain composition of high alumina hollow ball is: granularity is 10 ~ 20wt% less than 8mm and the granule more than or equal to 5mm, and granularity is 30 ~ 50wt% less than 5mm and the granule more than or equal to 3mm, and granularity is 30 ~ 60wt% less than 3mm and the granule more than or equal to 1mm;
The main chemical compositions of described flint clay is: Al2O3It is 40 ~ 50wt%, SiO2It is 40 ~ 60wt%, Fe2O3It is 1 ~ 3wt%; The grain composition of flint clay is: granularity is 50 ~ 60wt% less than 1mm and the granule more than or equal to 0.5mm, and granularity is 40 ~ 50wt% less than 0.5mm and the granule more than or equal to 0.074mm.
2. the preparation method of high alumina bubble lightweight castable according to claim 1, it is characterised in that the Al of described Alumina fine powder2O3Content >=88wt%, granularity��0.088mm.
3. the preparation method of high alumina bubble lightweight castable according to claim 1, it is characterised in that the Al of described alumina powder2O3Content >=98wt%, granularity��3 ��m.
4. the preparation method of high alumina bubble lightweight castable according to claim 1, it is characterised in that the SiO of described fine silica powder2Content >=95wt%, granularity��3 ��m.
5. the preparation method of high alumina bubble lightweight castable according to claim 1, it is characterised in that the Al of described aluminous cement2O3Content >=71wt%, CaO content��30wt%, granularity��3 ��m.
6. the preparation method of high alumina bubble lightweight castable according to claim 1, it is characterised in that the SiO of described Guangxi clay2Content >=40wt%, Al2O3�� 40wt%, granularity is��3 ��m.
7. the preparation method of high alumina bubble lightweight castable according to claim 1, it is characterised in that the Na of described sodium tripolyphosphate5P3O10Content >=98wt%, granularity��1mm.
8. the preparation method of high alumina bubble lightweight castable according to claim 1, it is characterised in that the Na of described sodium hexameta phosphate6P6O18Content >=98wt%, granularity��1mm.
9. a high alumina bubble lightweight castable, it is characterised in that described high alumina bubble lightweight castable is the high alumina bubble lightweight castable prepared by preparation method of the high alumina bubble lightweight castable according to any one of claim 1 ~ 8.
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CN106810283A (en) * 2017-03-08 2017-06-09 焦作金鑫恒拓新材料股份有限公司 A kind of mullite chromium lightening casting material
CN107352981A (en) * 2017-07-12 2017-11-17 宜兴瑞泰耐火材料工程有限公司 A kind of low heat conduction high-strength wear-resistant pouring material of CFB boiler material returning device corundum-mullite
CN107442768A (en) * 2017-08-10 2017-12-08 张家港浦项不锈钢有限公司 The pouring technology of steel-making continuous casting tundish permanent layer
CN109534831A (en) * 2018-12-05 2019-03-29 钢城集团凉山瑞海实业有限公司 Half cylinder of steel permanent layer castable
CN111423221A (en) * 2020-03-16 2020-07-17 宝武装备智能科技有限公司 Castable for rotary hearth furnace working layer and preparation method thereof
CN114213108A (en) * 2021-12-31 2022-03-22 偃师中岳耐火材料有限公司 Microporous lightweight castable for permanent lining of steel ladle and preparation method thereof
CN115466104A (en) * 2022-08-31 2022-12-13 湖南湘钢瑞泰科技有限公司 Light anhydrous stemming for iron-making blast furnace and preparation method thereof
CN116178031A (en) * 2022-12-27 2023-05-30 上海利尔耐火材料有限公司 Insulating layer castable for aluminum ash rotary kiln and preparation method thereof

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CN102887715A (en) * 2011-07-22 2013-01-23 宝山钢铁股份有限公司 Ladle permanent lining pouring material capable of rapid roasting
CN103613394A (en) * 2013-11-26 2014-03-05 武汉钢铁(集团)公司 Casting material with thermal insulation function

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CN101293777A (en) * 2008-06-25 2008-10-29 河南省耕生耐火材料有限公司 High-strength light weight castable refractory
CN102887715A (en) * 2011-07-22 2013-01-23 宝山钢铁股份有限公司 Ladle permanent lining pouring material capable of rapid roasting
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Publication number Priority date Publication date Assignee Title
CN106810283A (en) * 2017-03-08 2017-06-09 焦作金鑫恒拓新材料股份有限公司 A kind of mullite chromium lightening casting material
CN107352981A (en) * 2017-07-12 2017-11-17 宜兴瑞泰耐火材料工程有限公司 A kind of low heat conduction high-strength wear-resistant pouring material of CFB boiler material returning device corundum-mullite
CN107352981B (en) * 2017-07-12 2020-07-07 宜兴瑞泰耐火材料工程有限公司 Corundum-mullite low-heat-conductivity high-strength wear-resistant castable for CFB boiler feed back device
CN107442768A (en) * 2017-08-10 2017-12-08 张家港浦项不锈钢有限公司 The pouring technology of steel-making continuous casting tundish permanent layer
CN109534831A (en) * 2018-12-05 2019-03-29 钢城集团凉山瑞海实业有限公司 Half cylinder of steel permanent layer castable
CN111423221A (en) * 2020-03-16 2020-07-17 宝武装备智能科技有限公司 Castable for rotary hearth furnace working layer and preparation method thereof
CN114213108A (en) * 2021-12-31 2022-03-22 偃师中岳耐火材料有限公司 Microporous lightweight castable for permanent lining of steel ladle and preparation method thereof
CN115466104A (en) * 2022-08-31 2022-12-13 湖南湘钢瑞泰科技有限公司 Light anhydrous stemming for iron-making blast furnace and preparation method thereof
CN116178031A (en) * 2022-12-27 2023-05-30 上海利尔耐火材料有限公司 Insulating layer castable for aluminum ash rotary kiln and preparation method thereof

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