Open AccessStudy on a new process and its kinetics of iron recovery and glass-ceramics preparation from desulfurization slag
Author(s) -
Zhibo Tong,
Jiaotong Sun,
S.-C. Liu,
W. Zhang,
MeiLing Kuang
Publication year - 2022
Publication title -
journal of mining and metallurgy. section b, metallurgy/journal of mining and metallurgy. section b, metallurgy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.42
H-Index - 20
eISSN - 2217-7175
pISSN - 1450-5339
DOI - 10.2298/jmmb211008001t
Subject(s) - materials science , slag (welding) , glass recycling , crystallization , flue gas desulfurization , metallurgy , ceramic , gehlenite , vitrification , waste management , chemical engineering , phase (matter) , chemistry , medicine , organic chemistry , engineering , andrology
This paper creatively proposes a new process with desulfurization slag leached by ammonium chloride as pretreatment, and the main point of this paper lies in the processing of desulfurization residue leached by ammonium chloride. Through component analysis, the formula is adjusted with high aluminum coal ash and glass cullet, making the melting point of the reduction slag is around 1200?C, which facilitates the separation of iron and slag, at the same time, the reduction slag is adjusted to the target crystallization phase, so that the high temperature reduction slag after carbon thermal reduction can be used to produce glass-ceramics directly. The results show that iron recovery rate is over 99%, and diopside and nepheline glass-ceramics are produced, which show that the new process is feasible. However, the crystal growth index is less than 3, which means that the crystallization capacity of the glass-ceramics is low, and nucleating agent is needed in the preparation of glass-ceramics.