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Zhao Y.,Zhejiang Shangyu Dongrui Advanced Ceramics Co. | Huang A.,Wuhan University of Science and Technology | Xiao Z.-D.,The MCC Group | Wu B.,Zhejiang Shangyu Dongrui Advanced Ceramics Co.
Journal of Iron and Steel Research | Year: 2010

According to the practical physical dimension and processing parameters of torpedo in a factory, the desulphurizing process of melted iron in torpedo with bottom blowing were simulated based on the Eulerian multiphase model, porous media model for the gas flow through the porous refractory and desulphurizing process model, and effect of bottom blowing technique was discussed. The results show that the utilization coefficient of powers and desulphurization ratio are improved. As the gas flow rate increases, the desulphurizing results become better, even using 30 m3/h gas flow rate. The desulphurizing result of bottom blowing between inlet and the end at the bottom of torpedo is better, especially the position of 2 650mm. Blowing in 280s after the end of dust can avoid resulfurization and decrease sulfur content.

Zhao Y.,Zhejiang Shangyu Dongrui Advanced Ceramics Co. | Zhao S.,Zhejiang Shangyu Dongrui Advanced Ceramics Co. | Nie J.,Zhejiang Shangyu Dongrui Advanced Ceramics Co.
Naihuo Cailiao/Refractories | Year: 2010

AI2O3-SiC-C castables specimens were prepared using special grade bauxite and sub-white corundum as aggregates,ultra fine alumina,microsilica,SiC powder,calcium aluminate cement and silicon powder as matrix (the mass ratio of aggregates and matrix is 70 =30),additionally adding ball pitch of 0,1 wt% ,2 wt% and 3 wt% respectively,mixing with water and a little water reducing agent,shaping by vibration,curing, demoulding,drying,and heat treating at 1 500 °C for 3 h in air. Physical properties,HMOR and slag resistance of the specimens dried or heat treated were determined. The results show that HMOR of specimens decreases with the increase of ball pitch addition for the carbon oxidation leads to loose structure;slag resistance of specimens can be improved for the added proper amount of ball pitch softens and fills the pores during the heat treating;in the experimental condition,the castables with 1 wt% ball pitch performs the best.

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