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.