To address the durability degradation of cemented backfill materials under coupled freeze–thaw and sulfate attack in cold-arid mining areas, this study prepared coal gangue paste backfill specimens.

Researchers depressurized a tank of liquid carbon dioxide (CO2), instantly freezing it and releasing solid flakes.

Paste technology has been around for some time and it offers a relatively environmentally friendly solution for disposing of some mine tailings accumulations. Finlkand headquartered Outotec is one of ...