GUO Zongqi (3) 3
Abstract
Although slagging coal gasifiers have served the commercial systems of electricity and chemical fertilizer productions for more than ten years, refractory service life still is a critical factor for gasifier availability. Some investigations were attracted, focusing on coal slag attack on high chromia refractories. A general introduction is made in order to have further understanding about slag corrosion in coal gasification environment. Microstructural deterioration and wear process of high chromia refractory in slagging gasifiers are discussed.
 

LIU Jiehua and ZHOU Ningsheng (3) 10
Abstract
Based on the authors’ information sources and personal viewpoints, this paper provides updated information on China’s refractories situation in terms of output, consumption in main refractory using sectors, exportation and importation of refractory products and raw materials, structural change, future prosperity and new demands. From authors’ understanding, some analyses have also been given.

TAI Li and SHEN Keyin(3)15
Abstract
The paper reviews the present situation of refractories for Baosteel, including refractories for iron-making system, converters, ladles and tundishes. Descriptions have been also conducted on the environment protection and reutilization of refractories in Baosteel, together with some suggestions for refractories suppliers to meet the advancement in iron and steel making technology of Baosteel.
 

LI Lin,HONG Yanruo,SUN Jialin,OUYANG Junhua,HE Zhiyong and YU Li (3) 20
Abstract
The effects of graphite granularity on the properties of low carbon MgO-C based materials have been investigated in the work. Large crystal fused magnesia, natural flake graphite with different particle sizes and anti-oxidant were adopted as raw material for preparation of specimens. However, the results show that the physical properties, oxidation resistance and thermal shock resistance of low carbon MgO-C materials with content of 4.0 wt% graphite are improved obviously through the use of special and suitable size graphite. The excellent performance achieved was considered as a result of microstructure modification of MgO-C materials. Therefore, it is suggested that both fine and micro grade natural flake graphite used for production of low carbon MgO-C bricks.
 

ZHOU Xianxin,Michel RIGAUD and ZHOU Ningsheng(3)25
Abstract
Water addition has direct impact on castable placement; however it is more or less strictly controlled by installers. In this work, again, two basic rheological properties: flow resistance and torque viscosity have been measured against time, with different water addition in the same standard mix. The flow resistance indicates the mobility whereas the torque viscosity dictates the stability of a castable during installation. It has been observed that with 6.0 wt% water addition, such a mix possesses good vibration castable characteristics; with 6.5 wt%, it shows good self-flow castable characteristics; and with 7.0 wt%, it can be a good pumpable castable, in every case with comparable mechanical properties. While with 7.5 wt% water addition, the properties of such castable are definitively impaired.