利用电石渣制备活性石灰的基础研究  

Basic study on preparation of active lime from calcium carbide slag

作　　者：尹振兴 徐嘉程 武肖剑 刘露露 吴玉琴[2] Yin Zhenxing;Xu Jiacheng;Wu Xiaojian;Liu Lulu;Wu Yuqin(School of Metallurgical Engineering,Anhui University of Technology,Ma’anshan 243002,China;International Department,Jiangsu Tianyi High School,Wuxi 214000,China)

机构地区：[1]安徽工业大学冶金工程学院,马鞍山243002 [2]江苏省天一中学国际部,无锡214000

出　　处：《耐火与石灰》2023年第2期37-40,43,共5页Refractories & Lime

基　　金：国家自科基金资助项目(52074003)。

摘　　要：电石渣是一种以氢氧化钙为主的工业废渣,强碱性,产量大,易造成环境危害。为了实现电石渣的资源化利用,将电石渣经过煅烧处理获得活性石灰,可代替天然的活性石灰应用于钢铁冶金或其他行业中。通过XRF和XRD检测电石渣煅烧前后的物相和成分,确定了电石渣转变活性石灰的可行性;通过差热分析,研究电石渣在加热过程中发生的物理化学变化;通过设定不同的煅烧温度和时间,确定了电石渣的最佳煅烧制度,以便获得活性度最好的石灰。研究发现,电石渣在900℃下煅烧1.5 h后获得的石灰的活性度最高。Calcium carbide slag is a kind of industrial waste slag mainly composed of calcium hydroxide,and it features strong alkalinity,a large output and is easy to cause environmental hazards.To be utilized as a resource,calcium carbide slag is calcined to obtain active lime as it is an important auxiliary raw material for steelmaking or other industries instead of natural active lime.The physical phase and composition of calcium carbide slag before and after calcination are examined with XRF and XRD to determine the feasibility of converting calcium carbide slag into active lime.The physical and chemical changes that occur during the heating process of calcium carbide slag are investigated via differential thermal analysis.By setting different calcination temperatures and duration,the optimum calcination regime to obtain the lime with the best activity is determined.The study unveils that the lime obtained by calcining carbide slag at 900℃for 1.5 h has the highest activity.

关 键 词：电石渣 煅烧 活性石灰 物理化学变化 活性度 

分 类 号：TQ175.9[化学工程—硅酸盐工业]