RO相选取对钢渣粉改性试验探究
Research on RO phase selection for modification of steel slag powder
崔博 1王敏 1王连栋1
作者信息
- 1. 山东鲁碧建材有限公司,山东 莱芜 271104;济南市莱芜区综合检验检测中心,山东 莱芜 271104
- 折叠
摘要
我公司钢渣全年经破碎磁选后的尾渣在60万t左右,但钢渣因其性能不够稳定、RO相易磨性差且其中的氧化物没有水化活性,严重影响钢渣粉的最终活性指标.通过磁选可以有效降低钢渣中的RO相,改善其在水泥中使用性能 试验结果表明:钢渣在粉磨至合适的比表面积时进行RO相选取能够较大幅度的选取出钢渣中的非活性物质,实现RO相与活性矿物质的分解并降低MgO;当钢渣粉的比表面积控制在450～500 m2/kg时,可以很好的发挥其活性;当钢渣粉在复合粉中的比例为5％时,水泥的性能和各项指标较好,能够替代部分优质混合材,具有较好的经济效益.
Abstract
Our company's steel slag has a tailings of about 600 000 tons after crushing and magnetic separation throughout the year.However,due to its unstable performance,poor grindability of RO phase,and lack of hydration activity of oxides,the final activity index of steel slag powder is seriously affected.Magnetic separation can effectively reduce the RO phase in steel slag and improve its perfor-mance in cement.The experimental results show that when steel slag is ground to a suitable specific surface area,selecting the RO phase can significantly remove the non active substances in the slag,achieve the decomposition of RO phase and active minerals,and reduce MgO;When the specific surface area of steel slag powder is controlled between 450～500 m2/kg,its activity can be well exerted:When the proportion of steel slag powder in the composite powder is 5％,the performance and various indicators of cement are good,which can replace some high-quality mixtures and have good economic benefits.
关键词
RO相/钢渣/活性/比表面积Key words
RO phase/steel slag/activity/specific surface area引用本文复制引用
出版年
2024
NETL
NSTL
万方数据