Low cement (LC) and ultra low cement (ULC) bauxite SiC castables are important and high performance monolithic refractories and they have been widely used in iron making and incinerator linings. In this work, rheol...Low cement (LC) and ultra low cement (ULC) bauxite SiC castables are important and high performance monolithic refractories and they have been widely used in iron making and incinerator linings. In this work, rheological behavior of LC and ULC bauxite based SiC containing castables has been studied, including the effects of SiC content and cement content on rheological properties of the castables. The results show that with an increase of SiC and cement content, rheological properties of the castables deteriorate. On the other hand, moderate amounts of SiC (4%～8%) and of calcium aluminate cement (2%～4%) have very slight influence on rheological properties, (i.e. when the castables are sheared their torque and yield torque only slightly increase with the shearing speed). The rheological characteristics of the castables follow Bingham fluid and always show shear thinning behavior.展开更多
Rheplpgy of castables is greatly affected and controlled by rheological behavior of their matrix. In this work ,the rheological properties of bauxite-based castable matrix have been studied. The effects of super-fine ...Rheplpgy of castables is greatly affected and controlled by rheological behavior of their matrix. In this work ,the rheological properties of bauxite-based castable matrix have been studied. The effects of super-fine silica and alumina addition , water/ cement ratio, dispersants and bauxite particle-size on viscosity, shear rate and shear stress of the slur-ries have been investigated . Based on these results, the range of optimum composition of the matrix with good rheological behavior has been obtained.展开更多
In this work, the rheological behavior of ultra-low cement alumina-based castables with addition of flake graphite and extruded graphite pellets has been investigated by using IBB rheometer. Emphasis has been laid on ...In this work, the rheological behavior of ultra-low cement alumina-based castables with addition of flake graphite and extruded graphite pellets has been investigated by using IBB rheometer. Emphasis has been laid on the influence of the type and amount of carbon addition on rheological properties of the alumina-based castables and the results are compared with corresponding alumina castable samples without any carbon addition. It is found that alumina-based castables with extruded graphite pellets have good rheological behavior and flowability with lower water demand (<6.3%) and no segregation during the shearing of castable.展开更多
文摘Low cement (LC) and ultra low cement (ULC) bauxite SiC castables are important and high performance monolithic refractories and they have been widely used in iron making and incinerator linings. In this work, rheological behavior of LC and ULC bauxite based SiC containing castables has been studied, including the effects of SiC content and cement content on rheological properties of the castables. The results show that with an increase of SiC and cement content, rheological properties of the castables deteriorate. On the other hand, moderate amounts of SiC (4%～8%) and of calcium aluminate cement (2%～4%) have very slight influence on rheological properties, (i.e. when the castables are sheared their torque and yield torque only slightly increase with the shearing speed). The rheological characteristics of the castables follow Bingham fluid and always show shear thinning behavior.
文摘Rheplpgy of castables is greatly affected and controlled by rheological behavior of their matrix. In this work ,the rheological properties of bauxite-based castable matrix have been studied. The effects of super-fine silica and alumina addition , water/ cement ratio, dispersants and bauxite particle-size on viscosity, shear rate and shear stress of the slur-ries have been investigated . Based on these results, the range of optimum composition of the matrix with good rheological behavior has been obtained.
文摘In this work, the rheological behavior of ultra-low cement alumina-based castables with addition of flake graphite and extruded graphite pellets has been investigated by using IBB rheometer. Emphasis has been laid on the influence of the type and amount of carbon addition on rheological properties of the alumina-based castables and the results are compared with corresponding alumina castable samples without any carbon addition. It is found that alumina-based castables with extruded graphite pellets have good rheological behavior and flowability with lower water demand (<6.3%) and no segregation during the shearing of castable.
