流态化石灰的生产及在太钢铁水预处理站中的应用

摘要

Using the physical passivation technology in active lime treatment, a kind of fluidized lime suitable for pretreatment of hot metal desulphurization is developed. With high fluidity, good moisture resistance and low cost, this product can maintain in cold water for 2 hours without dissolution and absorbing moisture. The storage period is up to one year, and the content of CaO is more than 90%, besides, the activity is 350 mL. The products solve the problem of blocking up the guns and realize smooth feeding in hot metal pretreatment of TISCO. In the condition of 90 t average iron weight, 0.028% initial sulfur content, 3 kg/t lime consumption and 1 kg/t magne-sium powder consumption, the average desulfurization rate can reach 94.61%, and the average finished sulfur con-tent can reach 0.001 5%. In all, it has the ideal using effect.%采用物理钝化技术对活性石灰进行处理，研制出一种适用于铁水预处理脱硫用的流态化石灰产品。该产品流动性好、防潮性好、生产成本低，其防潮性可达到冷水浸泡2h不吸潮溶解，储存期可达一年，产品w（CaO）>90%，活性度为350 mL。此产品被应用在太钢铁水预处理复合喷吹脱硫中，很好地解决了石灰粉剂堵枪、下料不畅的难题，在平均铁水量为90 t、初始w（S）=0.028%、石灰粉消耗量平均为3 kg/t、镁粉消耗量平均为1 kg/t的条件下，铁水脱硫率平均可达94.61%，处理后的铁水w（S）平均为0.0015%。