碳质材料对中间包镁质干式料抗烧结性和抗渣渗透性的影响

Effects of carbonaceous materials on anti-sintering ability and slag penetration resistance of magnesia based dry vibrating materials for tundish

为解决中间包用镁质干式料在使用过程中的烧结严重和抗渣渗透性能差的问题,以烧结镁砂碎料为主料,5%(w)固体酚醛树脂为低温结合剂,1%(w)泡碱为中温结合剂,研究按w(C)≈3%分别加入冶金焦粉、废电极、碎石油焦或鳞片石墨四种碳质材料对镁质干式料性能的影响。结果表明:向镁质干式料中加入四种碳质材料的任一种,均能显著提高其抗烧结性能和抗渣渗透性,其中加入3%(w)废电极的最好。

To solve the problems of over-sintering and poor slag penetration resistance during application, four carbonaceous materials （3%,in mass,the same hereinafter） were added separately into the magnesia based dry vibrating materials which were prepared with sintered magnesia crushed aggregates as main starting material,adding 5% solid phenol resin as low temperature binder and 1% natron as medium temperature binder. The four carbonaceous materials were metallurgical coke powders, used electrodes, crushed petrol coke, and flake graphite, respectively. The results show that each of the four materials can improve the anti-sintering ability and slag penetration resistance of magnesia based dry vibrating materials for tundish,and the effect of 3% used electrodes is the best.