精炼渣论文：氧化钙粉体的防水化研究.docVIP

精炼渣论文：氧化钙粉体的防水化研究 【中文摘要】随着用户对钢材质量要求的提高,炼钢炉外精炼技术引起重视。炼钢炉外精炼工艺中精炼渣对钢水脱S和脱P影响大,而钢水S、P含量又直接影响钢材质量。炼钢炉外精炼工艺钢水脱S脱P要求精炼渣碱度高,虽然可采用加入石灰来提高精炼渣碱度,但石灰熔点高(2600℃)在炼钢炉外精炼温度范围(1600～1700℃)内熔化速度慢,在炼钢炉外精炼周期内,不能充分发挥作用。采用石灰粉剂可加快石灰在炼钢炉外精炼过程的熔化速度,但石灰粉易水化,同时粉剂在使用过程中易漂悬形成现场污染。于是本文针对当前炉外精炼渣熔化速度慢且其主要成分氧化钙在空气中易水化变质的缺点,对其进行了实验研究。对氧化钙粉剂表面进行碳酸化处理,在其表面形成一层碳酸钙保护膜。最后通过实验得出氧化钙粉剂在700度的温度,水浴温度40度,二氧化碳的通入量为经2.5L/min,通气30分钟的条件下,钝化效果最好.最后结合石灰钝化实验的研究成果,参考当前石灰的具体生产,提出利用石灰窑生产排出的二氧化碳对石灰表面进行钝化的生产工艺。最后将钝化过的石灰粉再与萤石等助熔剂粉混合成精炼渣,以湿法或干法成球达到炼钢炉外精炼工艺要求的粒度。 【英文摘要】As users improve the quality of steel, steel refining technology has been more attention. Steel refining process of molten steel refining slag off P de S and impact, and steel S, P content has a direct impact on the quality of steel. Molten steel refining process requires S and P slag refining of high alkalinity, although adding lime can be used to improve the refining slag basicity, but the lime high melting point (2600℃) in the steel refining temperature range (1600 to 1700℃) within the melt slowly, in the steel refining cycle, can not fully play its role. Lime using lime powder can speed up the process of refining in the steel melting rate, but the powder of lime easy to hydrate, and powder easy to drift in the course of the formation of on-site pollution hanging.So this paper, the current refining molten slag is slow and the main component of calcium oxide in the air of deterioration of the shortcomings to hydrate, its experimental study. Of calcium oxide powder surface carbonation process, the formation of a layer of calcium carbonate on the surface protective film. Finally, calcium oxide powder obtained by experiments at 700 degrees temperature, water bath temperature of 40 degrees, the amount of carbon dioxide leads by 2.5L/min, ventilation for 30 minutes under the conditions of passivation best. At last, lime passivation experimental research, the specific reference to the current production of lime, made use of lime kiln lime production emissions of c