Heavy metal removal from aqueous solutions by calcium silie powder ...
WEBMay 1, 2018 · The main product of IMDIRRD is alumina produced from coal flyash. A demoline has been constructed, with a production of alumina of 200,000 tonnes per annum, along with 150,000 tonnes of CSP. This route for the utilization of coal flyash has been one of the typical cases of cyclic economics in China.