材料期刊网

运用相关系研究了氧气转炉中高磷熔渣对白云石炉衬侵蚀甚烈的原因。 与低磷熔渣比较,高磷熔渣侵蚀白云石中MgO数量相似,对CaO则较强烈。其原因有三: 一、高磷熔渣于1600℃为均质熔液和对CaO反应力很大的非均质熔液,而低磷熔渣则为对CaO反应力很小的非均质熔液; 二、于1600℃下,高磷熔渣有时为二相熔液,低磷熔渣为单相熔液。二相熔液侵夺CaO甚烈; 三、在高磷渣中,SiO_2含量愈大,则CaO饱和量愈大,熔渣侵蚀CaO愈多。在低磷熔渣内无此现象。 对上列缺点,建议在熔渣内提高CaO含量,以资补救。

The very severe attack of the dolomite lining of oxygen-blown steel-making converters by high P_2O_5 containing slags has been considered on phase relations. In steel-making practice, no difference was observed between slags of high and of low P_2O_5 content in their attack upon MgO in dolomite linings, but upon CaO in the same linings was more severe and the higher the P_2O_5 content of the slag, the greater the attack. Reasons for these are as follows:1. At 1600℃ the slag of high P_2O_5 content is a homogeneous liquid or a heterogeneous liquid of high reactivity with CaO, whereas the slag of low P_2O_5 content is a heterogeneous liquid of low reactivity with CaO.2. At 1600℃ the slag of high P_2O_5 content sometimes appears to be a twophase liquid, which attacks CaO severey, whereas the slag of low P_2O_5 content is always an one-phase liquid.3. with slags of high P_2O_5 content, the greater the amount of SiO_2 present, the higher will be its saturation for CaO, thus rendering the attack on CaO more severe. This is not the case, however, with slags of low P_2O_5 content.The above problem may be remedied by introducing more CaO in slag.