酸浸钒渣制备高强陶粒工艺  

Preparation Process of High Strength Ceramsite from Acid Leaching Vanadium Tailing

作　　者：王勇海 梁效[1] 牛芳银 曹欢 郭月琴 Wang Yonghai;Liang Xiao;Niu Fangyin;Cao Huan;Guo Yueqin(Xi'an Northwest Geology Institute of Nonferrous Metals Co.,Ltd.,Xi’an,Shaanxi,China;School of Resources Processing and Bioengineering,Central South University,Changsha,Hunan,China)

机构地区：[1]西安西北有色地质研究院有限公司,陕西省矿产资源综合利用工程技术研究中心,陕西西安710054 [2]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《矿产综合利用》2022年第3期58-63,共6页Multipurpose Utilization of Mineral Resources

摘　　要：为了提高酸浸钒渣的利用效率,以商洛千家坪钒渣为主要原料,添加黏土和粉煤灰制备建筑用烧结陶粒。对陶粒制备过程中各物料的配比、制粒工艺参数、预热和焙烧制度进行了系统研究。结果表明,物料配比为钒渣∶粘土∶粉煤灰=6∶1∶3、制粒用水量为18%、制粒时间为15 min、预热温度为400℃、预热时间为30 min、焙烧温度为1160℃、焙烧时间为20 min的条件下,可制得筒压强度为11.58 MPa,堆积密度为1014.7 kg/m^(3),吸水率为5.61%的高强陶粒。SEM和XRD分析结果表明,钒渣在烧结成陶粒的过程中主要产生了石英、斜长石和钾长石相,形成了结构致密、孔骨架良好的矿物集合体,因此提高了陶粒的强度。In order to improve the utilization efficiency of acid leaching vanadium tailing,the sintered ceramsite for building was prepared by adding clay and fly ash with Shangluo Qianjiaping vanadium tailing as the main raw material.The proportion of materials,the parameters of granulation process,the preheating and roasting conditions in the preparation of ceramsite were systematically studied.The results show that when the ratio of vanadium tailing,clay and fly ash is 6:1:3,granulating water granulation water consumption is 18%,granulation time is 15 min,preheating temperature is 400℃,preheating time is 30 min,roasting temperature is 1160℃,roasting time is 20 min,the high strength ceramsite with compression strength of 11.58 Mpa,packing density of 1014.7 kg/m^(3) and water absorption of 5.61% can be obtained.SEM and XRD analysis indicate that in the process of ceramsite synthesis,quartz,anorthite and albite phases has been generated and formed mineral aggregates with compact structure and good pore skeleton,thus increasing the strength of ceramsite.

关 键 词：酸浸钒渣 烧结 陶粒 高强 

分 类 号：TD989[矿业工程—选矿] X753[环境科学与工程—环境工程]