Figure 1

The mineral characteristics of coal gangue and brick.
K- kaolinite, I- illite, Q- quartz, Ch- chlorite, An- ankerite, D- dolomite, C- calcite, P-pyrite, M- mullite, H- hematite, L- lime, Ma- magnetite.

The mineral characteristics of coal gangue and brick.
K- kaolinite, I- illite, Q- quartz, Ch- chlorite, An- ankerite, D- dolomite, C- calcite, P-pyrite, M- mullite, H- hematite, L- lime, Ma- magnetite.