不同粉碎机理的钢渣中RO相解离性能  

Comparison of Different Breakage Mechanisms in Terms of RO Phase Liberation Properties in Steel Slag

作　　者：侯新凯[1] 张锦 武志江 黄瑞涛 王丹[1] 郭海涛 HOU Xinkai;ZHANG Jin;WU Zhijiang;HUANG Ruitao;WANG Dan;GUO Haitao(College of Materials and Mineral Resources,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学材料与矿资学院,陕西西安710055

出　　处：《矿产保护与利用》2018年第5期115-120,125,共7页Conservation and Utilization of Mineral Resources

基　　金：陕西省自然科学基础研究计划项目(2016JM5010);山西省科技创新项目(2013101038)

摘　　要：为寻求钢渣中RO相解离的最佳粉碎机制,选取高压辊磨机(辊压机)、立式辊磨机(立磨)和球磨机制备的4种粒度分布钢渣粉,每种钢渣粉机械筛分为7个粒级并制成光片。人工统计RO相在5种解离类中分布率、相表面参数,以单体解离度和解离> 75%的含量,2个指标表征解离性能;以相比界面面积和自由表面率,2个参数表征脱离解离量。4种钢渣粉中脱离解离量都高,RO相属于易解离矿物。粉碎设备脱离解离量高低次序为辊压机、立磨、球磨,同一设备粉磨细度越高,脱离解离量越大。RO相粒级解离度以嵌布粒度为界分为解离度平稳区和下降区,平稳区解离度稳定在高值且与设备无关;下降区挤压粉碎设备解离度高,粒级解离度随粒度增大降低幅度较大。In order to find the best breakage mechanism of RO phase liberation in steel slag,four kinds of steel slag powder with different particle size distribution have been comminuted respectively by high-pressure grinding rolls(roller press),vertical roller mill(vertical mill)and ball mill.Each of them was actually sieved into 7 size fractions then made into polished section.The proportion of RO phase grain in the five liberation classes and the phase surface parameters were manually counted.The liberation properties were characterized by the two index parameters of liberation degree and the amount of 75%~100%liberated,while the amount of liberation by detachment was described by phase specific interfacial area and free surface percentage.As the RO phase in steel slag is easy to be released from the rock matrix,the amount of liberation by detachment of four steel slag powders is large.The priority sequence of comminution equipment in terms of the amount of liberation by detachment is roller press,vertical mill,ball mill.The finer the steel slag powder made by the same equipment,the better the amount of liberation by detachment.Liberated minerals could be divided into two regions by the average dissemination size of RO phase.The first region is a stability zone for liberation properties,in which the degree of liberation is independent of particle size and device.The second region is a decline zone,in which the liberation degree significantly decreases with increasing the particle size.

关 键 词：钢渣 RO相 脱离解离 相比界面面积 挤压床粉碎 

分 类 号：TD921.4[矿业工程—选矿] X757[环境科学与工程—环境工程]