Volume 37, Number 3, 2003Effect of microsilica on flowability and flow decay ofAl;O;-SiC-C castables for BF trough （125～127 ）.Chen Zhiqiang, He Xia, Bjorn Myhre, et al. -Al;O;-SiC-Ccastable, Flowability, Microsilic...Volume 37, Number 3, 2003Effect of microsilica on flowability and flow decay ofAl;O;-SiC-C castables for BF trough （125～127 ）.Chen Zhiqiang, He Xia, Bjorn Myhre, et al. -Al;O;-SiC-Ccastable, Flowability, Microsilica, Wo-rkingtime, Reactive alumina. -Effects of microsilica addi-tion and reactive alumina type on flowability, flowdecay and working time of Al;O;-SiC-C castables forBF trough were investigated. The results show that展开更多
Effects of B4 C and Si antioxidant on oxidation resistance of low-carbon MgO-C bricks.Effects of dispersion method and content of nanometer carbon black on mechanical properties of low carbon MgO-C materials.
Volume 43, Number 6, 2009Dissolution behaviors of refractory fiber powders in simulated lung fluid. Wang Xitang, Liu Hao, Zhang Baoguo, et al. （401 - 404）. --Bio-soluble refractoofiber, Sim.lated lung fluid, Dissolu...Volume 43, Number 6, 2009Dissolution behaviors of refractory fiber powders in simulated lung fluid. Wang Xitang, Liu Hao, Zhang Baoguo, et al. （401 - 404）. --Bio-soluble refractoofiber, Sim.lated lung fluid, Dissolution behavior--The dissolution behaviors in Gamble solution （simulated lung fluid） of bio-soluble refractory fiber and alumino- silicate refractory fiber were analyzed and compared using ICP - AES, FTIR,展开更多
Influences of fused alumina and β-SiAION additions on rheological properties of MgO-based castables,Coal ash slag wettability on Cr2O3-Al2O3-ZrO2 bricks and its penetration behavior,Slag resistance of MgO-SiC-C compo...Influences of fused alumina and β-SiAION additions on rheological properties of MgO-based castables,Coal ash slag wettability on Cr2O3-Al2O3-ZrO2 bricks and its penetration behavior,Slag resistance of MgO-SiC-C composite,Oxidation resistance of unfired Al/Si-containing low carbon Al2O3-β-SiAlON materials……展开更多
Volume 42, Number 3, 2008Effects of B4C and Si antioxidant on oxidation resistance of low-carbon MgO-C bricks.Wang Zhiqiang,Zhu Boquan,Fang Binxiang,et al.(161-164).-Boron carbide,Silicon powder,Low carbon magnesia ca...Volume 42, Number 3, 2008Effects of B4C and Si antioxidant on oxidation resistance of low-carbon MgO-C bricks.Wang Zhiqiang,Zhu Boquan,Fang Binxiang,et al.(161-164).-Boron carbide,Silicon powder,Low carbon magnesia carbon bricks,Oxidation resistance-The low-carbon MgO-C specimens with size of 36 mm×36 mm were prepared using fused magnesia,crystalline flake graphite and carbon black as main starting materials,thermoplastic phenol formaldehyde resin as binder,hexamethylene tetramine as fixing tanning agent,Si powder(w(Si)>80%,particle size <0.074 mm)and B4C (d90=36.5 μm) as antioxidant,pressing at 200 MPa and drying at 200 ℃ for 24 h.The oxidation resistance experiments were conducted at 600 ℃,1 000 ℃ and 1 400 ℃ for 2 h,respectively.Effects of B4C and Si antioxidant on oxidation resistance of low-carbon MgO-C bricks were studied by comparing the areas of the decarburized layers.The results show that:(1)When Si powder addition is 3%,at 600 ℃ and 1 000 ℃,the specimens with 0.5% B4C performs good oxidation resistance;At 1 400 ℃,the oxidation resistance of the specimens increase with the addition of B4C increasing,and that with 0.7% B4C is the best.(2)When B4C addition is 0.5%,at 600 ℃ and 1 000 ℃,the oxidation resistances of the specimens with 3% and 5% Si powder are silimar,which are better than that of the specimen with 1% Si powder;and at 1 400 ℃,the oxidation resistance of the specimens improves obviously with the addition of Si powder increasing,and that with 5% silicon powder is the best.(3)Based on the results,it is believed that the low-carbon MgO-C bricks with 0.5% B4C and 3% Si powder perform the best oxidation resistance.展开更多
Volume 42,Number 5,2008Synthesis of MgAl2O4 spinel from mechanically activated mixtures of magnesium hydroxide-boehmite or-aluminum tri-hydroxide.Ye Guotian,George Oprea,Tom Troczynski.(321-325).-Magnesium aluminate s...Volume 42,Number 5,2008Synthesis of MgAl2O4 spinel from mechanically activated mixtures of magnesium hydroxide-boehmite or-aluminum tri-hydroxide.Ye Guotian,George Oprea,Tom Troczynski.(321-325).-Magnesium aluminate spinel,Mechanical activation,Synthesis-Magnesium hydroxide,boehmite and amorphous aluminum tri-hydroxide were used as the starting materials.Two mixtures of magnesium hydroxide-boehmite and magnesium hydroxide-amorphous aluminum tri-hydroxide with MgO/Al2O3 molar ratio of 1:1 were mixed in a展开更多
Basic research and technical development of refrac- tories achieved during the Tenth Five Year Plan for iron and steel industry. Wang Jinxiang. （321- 326）. -Iron and steel industry, Refractories- The basic research ...Basic research and technical development of refrac- tories achieved during the Tenth Five Year Plan for iron and steel industry. Wang Jinxiang. （321- 326）. -Iron and steel industry, Refractories- The basic research and technical development of refractories achieved during the Tenth Five Year Plan（2001-2005 ） for iron and steel industry in China have been briefly introduced. The developing trend for refractories afterwards has been discussed in this paper.展开更多
Volume 43,Number 2,2009 Refractories for RH degassers and ways of improving RH lining life. Chen Zhaoyou. (81-95). -Refractories for RH,Refine slag resistance,Magnesite-chrome brick,Structural spalling,Silicon steel...Volume 43,Number 2,2009 Refractories for RH degassers and ways of improving RH lining life. Chen Zhaoyou. (81-95). -Refractories for RH,Refine slag resistance,Magnesite-chrome brick,Structural spalling,Silicon steel-This paper attempts to clarify the systematic works of the refractories for the RH degassers and the ways of improving RH lining life. It includes:(1)Types of RH degassers. (2)The operating conditions of refining and the severely damaged areas in RH degassers. (3)The reasions why side wall and bottom of lower vessel,throat and snorkels become the severe wear areas are analyzed,such as erosion and abrasion caused by the high circulation rate of treated molten steel,thermal and structural spalling by the violent temperature change,high corrosion by the Fe-oxides containing siliceous slag and CaF2-riched desulfurization powders attack,degradation of texture by the vaporisation of refractory components in vacuum and in oxygen blowing. Besides the above mentioned factors,another reason making the snorkels become the most quick wear elements is also explained. (4)The studies of resistance to refining slags attack and slag penetration and its prevention. The evaluation of various refractory materials to withstand the attack of slags is based on the experimental results of rotating cylinder method,rotary drum test and induction furnace test,and the phase diagrams analyses. The measures to reduce the slag penetration are discussed,for example the depth of slag penetration can be decreased by reducing the size of brick pores. (5)Suitable refractory materials selection and recent developments for the different severe wear areas in RH,and lining maintenance. (6)Refractories for RH to refine silicon steel. (7)The ways of improving RH lining life.展开更多
Volume 41, Number 2, 2007 Influences of fused alumina and β-SiAlON additions on rheological properties of MgO-based castables. Ma Chengliang, Zhang Dianwei, Ye Fangbao, et al. (81-84). -Magnesia-based castables, Rheo...Volume 41, Number 2, 2007 Influences of fused alumina and β-SiAlON additions on rheological properties of MgO-based castables. Ma Chengliang, Zhang Dianwei, Ye Fangbao, et al. (81-84). -Magnesia-based castables, Rheological properties,SiAlON,Fused alumina- Magnesia-based castables were prepared by using fused magnesite as aggregate(8-5 mm,5-3 mm,3-1 mm,≤1 mm),27%展开更多
Volume 40,Number 3,2006Study on graphite surface modification by heterogeneous nucleation process. Cao Ran,Li Hongxia（161-164）. -Graphite,Surface modification,Heterogeneous nucleation,Zirconia,Oxidation resistance -...Volume 40,Number 3,2006Study on graphite surface modification by heterogeneous nucleation process. Cao Ran,Li Hongxia（161-164）. -Graphite,Surface modification,Heterogeneous nucleation,Zirconia,Oxidation resistance - Flaky graphite particles were coated by ZrOCl2·8H2O as precursors by heterogeneous nucleation process.The effects of factors such as pH values（2.4-5.1）,concentration of the precursor solution（0.005-0.1 mol·L -1）,mixing method of graphite and precursor solution on the surface modification of graphite were studied. Result shows that:1)The preferable technical process for heterogeneous nucleation modified graphite is to mix the graphite suspension and precursor solution with concentration 0.025 mol·L -1 and then drip ammonia water to adjust the pH value to 3.6;2)By surface modification,the ZrO2 particles are evenly coated on graphite surface and therefore improves oxidation resistance and dispersion ability of graphite.展开更多
文摘Volume 37, Number 3, 2003Effect of microsilica on flowability and flow decay ofAl;O;-SiC-C castables for BF trough （125～127 ）.Chen Zhiqiang, He Xia, Bjorn Myhre, et al. -Al;O;-SiC-Ccastable, Flowability, Microsilica, Wo-rkingtime, Reactive alumina. -Effects of microsilica addi-tion and reactive alumina type on flowability, flowdecay and working time of Al;O;-SiC-C castables forBF trough were investigated. The results show that
文摘Effects of B4 C and Si antioxidant on oxidation resistance of low-carbon MgO-C bricks.Effects of dispersion method and content of nanometer carbon black on mechanical properties of low carbon MgO-C materials.
文摘Volume 43, Number 6, 2009Dissolution behaviors of refractory fiber powders in simulated lung fluid. Wang Xitang, Liu Hao, Zhang Baoguo, et al. （401 - 404）. --Bio-soluble refractoofiber, Sim.lated lung fluid, Dissolution behavior--The dissolution behaviors in Gamble solution （simulated lung fluid） of bio-soluble refractory fiber and alumino- silicate refractory fiber were analyzed and compared using ICP - AES, FTIR,
文摘Influences of fused alumina and β-SiAION additions on rheological properties of MgO-based castables,Coal ash slag wettability on Cr2O3-Al2O3-ZrO2 bricks and its penetration behavior,Slag resistance of MgO-SiC-C composite,Oxidation resistance of unfired Al/Si-containing low carbon Al2O3-β-SiAlON materials……
文摘Volume 42, Number 3, 2008Effects of B4C and Si antioxidant on oxidation resistance of low-carbon MgO-C bricks.Wang Zhiqiang,Zhu Boquan,Fang Binxiang,et al.(161-164).-Boron carbide,Silicon powder,Low carbon magnesia carbon bricks,Oxidation resistance-The low-carbon MgO-C specimens with size of 36 mm×36 mm were prepared using fused magnesia,crystalline flake graphite and carbon black as main starting materials,thermoplastic phenol formaldehyde resin as binder,hexamethylene tetramine as fixing tanning agent,Si powder(w(Si)>80%,particle size <0.074 mm)and B4C (d90=36.5 μm) as antioxidant,pressing at 200 MPa and drying at 200 ℃ for 24 h.The oxidation resistance experiments were conducted at 600 ℃,1 000 ℃ and 1 400 ℃ for 2 h,respectively.Effects of B4C and Si antioxidant on oxidation resistance of low-carbon MgO-C bricks were studied by comparing the areas of the decarburized layers.The results show that:(1)When Si powder addition is 3%,at 600 ℃ and 1 000 ℃,the specimens with 0.5% B4C performs good oxidation resistance;At 1 400 ℃,the oxidation resistance of the specimens increase with the addition of B4C increasing,and that with 0.7% B4C is the best.(2)When B4C addition is 0.5%,at 600 ℃ and 1 000 ℃,the oxidation resistances of the specimens with 3% and 5% Si powder are silimar,which are better than that of the specimen with 1% Si powder;and at 1 400 ℃,the oxidation resistance of the specimens improves obviously with the addition of Si powder increasing,and that with 5% silicon powder is the best.(3)Based on the results,it is believed that the low-carbon MgO-C bricks with 0.5% B4C and 3% Si powder perform the best oxidation resistance.
文摘Volume 42,Number 5,2008Synthesis of MgAl2O4 spinel from mechanically activated mixtures of magnesium hydroxide-boehmite or-aluminum tri-hydroxide.Ye Guotian,George Oprea,Tom Troczynski.(321-325).-Magnesium aluminate spinel,Mechanical activation,Synthesis-Magnesium hydroxide,boehmite and amorphous aluminum tri-hydroxide were used as the starting materials.Two mixtures of magnesium hydroxide-boehmite and magnesium hydroxide-amorphous aluminum tri-hydroxide with MgO/Al2O3 molar ratio of 1:1 were mixed in a
文摘Basic research and technical development of refrac- tories achieved during the Tenth Five Year Plan for iron and steel industry. Wang Jinxiang. （321- 326）. -Iron and steel industry, Refractories- The basic research and technical development of refractories achieved during the Tenth Five Year Plan（2001-2005 ） for iron and steel industry in China have been briefly introduced. The developing trend for refractories afterwards has been discussed in this paper.
文摘Volume 43,Number 2,2009 Refractories for RH degassers and ways of improving RH lining life. Chen Zhaoyou. (81-95). -Refractories for RH,Refine slag resistance,Magnesite-chrome brick,Structural spalling,Silicon steel-This paper attempts to clarify the systematic works of the refractories for the RH degassers and the ways of improving RH lining life. It includes:(1)Types of RH degassers. (2)The operating conditions of refining and the severely damaged areas in RH degassers. (3)The reasions why side wall and bottom of lower vessel,throat and snorkels become the severe wear areas are analyzed,such as erosion and abrasion caused by the high circulation rate of treated molten steel,thermal and structural spalling by the violent temperature change,high corrosion by the Fe-oxides containing siliceous slag and CaF2-riched desulfurization powders attack,degradation of texture by the vaporisation of refractory components in vacuum and in oxygen blowing. Besides the above mentioned factors,another reason making the snorkels become the most quick wear elements is also explained. (4)The studies of resistance to refining slags attack and slag penetration and its prevention. The evaluation of various refractory materials to withstand the attack of slags is based on the experimental results of rotating cylinder method,rotary drum test and induction furnace test,and the phase diagrams analyses. The measures to reduce the slag penetration are discussed,for example the depth of slag penetration can be decreased by reducing the size of brick pores. (5)Suitable refractory materials selection and recent developments for the different severe wear areas in RH,and lining maintenance. (6)Refractories for RH to refine silicon steel. (7)The ways of improving RH lining life.
文摘Volume 41, Number 2, 2007 Influences of fused alumina and β-SiAlON additions on rheological properties of MgO-based castables. Ma Chengliang, Zhang Dianwei, Ye Fangbao, et al. (81-84). -Magnesia-based castables, Rheological properties,SiAlON,Fused alumina- Magnesia-based castables were prepared by using fused magnesite as aggregate(8-5 mm,5-3 mm,3-1 mm,≤1 mm),27%
文摘Volume 40,Number 3,2006Study on graphite surface modification by heterogeneous nucleation process. Cao Ran,Li Hongxia（161-164）. -Graphite,Surface modification,Heterogeneous nucleation,Zirconia,Oxidation resistance - Flaky graphite particles were coated by ZrOCl2·8H2O as precursors by heterogeneous nucleation process.The effects of factors such as pH values（2.4-5.1）,concentration of the precursor solution（0.005-0.1 mol·L -1）,mixing method of graphite and precursor solution on the surface modification of graphite were studied. Result shows that:1)The preferable technical process for heterogeneous nucleation modified graphite is to mix the graphite suspension and precursor solution with concentration 0.025 mol·L -1 and then drip ammonia water to adjust the pH value to 3.6;2)By surface modification,the ZrO2 particles are evenly coated on graphite surface and therefore improves oxidation resistance and dispersion ability of graphite.
