The repaired coal gangue matrix has greatly inhibited the acid production capacity, but the NAG and NAPP values are still high (> 120 kgH2SO4/t), and NAG-pH <2.5.
The acid production capacity of the repaired coltan substation has been significantly inhibited, but NAG and NAPP values are still high (> 120 kgH2SO4/t) and NAG-pH < 2.5.
The acid production capacity of the repaired coal gangue matrix has been greatly inhibited, but the nag and NAPP values are still very high (> 120 kgh2so4 / T), and nag-ph < 2.5.<br>