东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (9): 1279-1283.DOI: 10.12068/j.issn.1005-3026.2019.09.012

• 材料与冶金 • 上一篇    下一篇

Mk对调质高炉渣制备矿渣棉过程中熔渣性能影响

杜培培1， 张玉柱1,2， 龙跃2   

  1. (1. 东北大学 冶金学院， 辽宁 沈阳110819; 2. 华北理工大学 冶金与能源学院， 河北 唐山063210)
  • 收稿日期:2018-09-10 修回日期:2018-09-10 出版日期:2019-09-15 发布日期:2019-09-17
  • 通讯作者: 杜培培
  • 作者简介:杜培培(1989-)，女，山东菏泽人，东北大学博士研究生; 张玉柱(1956-)，男，河北南皮人，华北理工大学教授，东北大学博士生导师; 龙跃(1976-)，男，重庆忠县人，华北理工大学教授.
  • 基金资助:
    国家自然科学基金资助项目(51874138).

Effect of Mk on Slag Properties in the Process of Preparing Slag Wool from Modified-Blast-Furnace-Slag

DU Pei-pei1， ZHANG Yu-zhu1,2， LONG Yue2   

  1. 1. School of Metallurgy， Northeastern University， Shenyang 110819， China; 2. School of Metallurgy and Energy， North China University of Science and Technology， Tangshan 063210， China.
  • Received:2018-09-10 Revised:2018-09-10 Online:2019-09-15 Published:2019-09-17
  • Contact: LONG Yue
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摘要： 利用铁尾矿进行高炉渣调质实验，研究了酸度系数(Mk)对调质高炉熔渣析晶性能、黏度及表面张力的影响.结果表明:随Mk的增加，调质熔渣的析晶温度明显降低，当Mk高于1.4时熔渣温度降至1100℃，体系仍为无序玻璃相;随Mk的增大，调质熔渣黏度对温度变化的敏感性逐渐减弱，适宜成纤黏度范围对应的温度区间逐渐增大，适宜成纤黏度范围内最低成纤温度与析晶温度之差Δt=(○t○w-○t○l)逐渐增大，当Mk为1.2时Δt为101.7℃;在调质熔渣适宜成纤温度范围内，Mk对熔渣表面张力的影响不大，熔渣表面张力与黏度的比值σ/η(表征熔渣成形难易程度)随Mk的增大逐渐减小.

关键词: 高炉渣, 矿渣棉, 析晶性能, 黏度, 表面张力

Abstract: Blast furnace slag modifying experiments using iron tailings were conducted to investigate the effect of acidity coefficient(Mk)on crystallization property， viscosity and surface tension of modified-blast-furnace-slag. The results indicated that crystallization temperature of modified slag significantly decreases with the increase of Mk and the slag system is still unordered glass phase with slag temperature decreasing to 1100℃ when Mk is above 1.4. The sensitivity of slag viscosity to temperature change gradually decreases， the temperature range corresponding to theoretically suitable fiber-formation-viscosity range of slag wool gradually increases， and the difference between minimum fiber-formation-temperature and crystallization temperature in suitable fiber-formation-viscosity range(Δt=(t○w-t○l))， which is only 101.7℃ when Mk is 1.2， gradually increase with the increase of Mk. The effect of Mk on surface tension of slag is small and the ratio of surface tension to viscosity， σ/η， symbolizing difficult degree of slag-forming， gradually decreases with the increase of Mk in suitable fiber-formation-temperature range.

Key words: blast furnace slag, slag wool, crystallization property, viscosity, surface tension

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