通过部分用 B2O3 取代 SiO2 来调整镍铁渣的熔融和结晶行为，以用于矿棉生产。

Adjusting the melting and crystallization behaviors of ferronickel slag via partially replacing of SiO by BO for mineral wool production.

机构信息

School of Metallurgy and Environment, Central South University, Changsha 410083, China; National Center for International Research of Clean Metallurgy, Central South University, Changsha 410083, China.

出版信息

Waste Manag. 2020 Jun 15;111:34-40. doi: 10.1016/j.wasman.2020.05.015. Epub 2020 May 25.

DOI:10.1016/j.wasman.2020.05.015

PMID:32464523

Abstract

Utilization of ferronickel slag as a raw material for mineral wool production not only conserves natural resources, but also achieves the sustainable development for the ferronickel industry. In order to utilize the ferronickel slag more efficiently, the melting and crystallization behaviors of the slag with the partial replacement of SiO by BO were investigated in this paper. The results show that the initial and complete melting temperatures decreased with BO substitution for SiO, which indicates that the addition of BO can reduce the energy consumption during the melting process. The incubation time of the slag in the Time Temperature Transformation (TTT) diagram increased, whereas the initial crystallization temperature in the Continuous Cooling Transformation (CCT) diagram decreased when SiO was substituted by BO. In addition, the main crystalline phases precipitated in the slags were columnar MgSiO and MgSiO. The weakening of crystallization ability caused by the substitution of BO for SiO will be beneficial for the improvement of fiber quality when the ferronickel slag is used as a raw material for mineral wool production.

摘要

利用镍铁渣作为生产矿棉的原料，不仅可以节约自然资源，还可以实现镍铁工业的可持续发展。为了更有效地利用镍铁渣，本文研究了用部分 B2O3 替代 SiO2 时镍铁渣的熔融和结晶行为。结果表明，随着 B2O3 替代 SiO2，起始和完全熔融温度降低，表明添加 B2O3 可以降低熔融过程的能耗。在时间-温度转变（TTT）图中，渣的孕育时间增加，而在连续冷却转变（CCT）图中，当 SiO2 被 B2O3 替代时，初始结晶温度降低。此外，在渣中析出的主要晶相是柱状 MgSiO 和 MgSiO。B2O3 替代 SiO2 导致结晶能力减弱，这将有利于提高纤维质量，当镍铁渣用作矿棉生产的原料时。