钢渣中游离氧化镁含量的测定及其减量控制措施

发布时间：2018-02-27 01:30

  本文关键词： 钢渣 安定性 游离氧化镁 滴定 高温改性　出处：《矿产综合利用》2017年05期 　论文类型：期刊论文

【摘要】：钢渣中存在的游离氧化镁易发生水化膨胀导致其安定性不良,限制了钢渣部分替代水泥制备胶凝材料的回收利用。本文优化了氯化铵-乙二醇滴定检测f-MgO的方法,研究表明以RO相和镁铁尖晶石相存在的氧化镁以及钢渣中的其他组分对f-MgO含量的检测干扰较小,测试数据准确度高,为钢渣安定性的判断提供了依据。同时,采用以铁尾矿和石灰石组成的改性剂对转炉钢渣进行改性,经1350℃高温改性和水冷处理后,其中f-MgO含量可由2.02%降低至0.89%,降幅达55.94%。高温改性可以显著降低游离氧化镁的含量,有助于改善钢渣安定性。
[Abstract]:The hydration expansion of free magnesium oxide in steel slag is easy to lead to poor stability, which limits the recovery and utilization of cement instead of cement. In this paper, the detection method of f-MgO by ammonium chloride and ethylene glycol titration is optimized. The results show that the presence of RO phase and magnesia-ferrite spinel phase and other components in steel slag have less interference on the detection of f-MgO content, and the accuracy of the test data is high, which provides a basis for judging the stability of steel slag. The converter steel slag was modified by the modifier composed of iron tailings and limestone. After high temperature modification at 1350 鈩，

本文编号：1540565