Nature protection technologies

3.5.6.2. Integrated recycling of ash and slag of Ekibastuz coals into aluminum oxide, aluminium salts, ferrosilicon and cement

Part 3. ASH AND SLAG HANDLING

3.5. Applications of ash and slag from power coals

3.5.6. Obtaining different substances from coal combustion by-products

3.5.6.2. Integrated recycling of ash and slag of Ekibastuz coals into aluminum oxide, aluminium salts, ferrosilicon and cement

S.S.Nurkeyev, D.T.Matayeva, Kazakh National Technical University named after K.I.Satpayev, Almaty, Kazakhstan

 The paper contains the results of the designed alkaline and acidic methods of integrated recycling of power and self-disintegrated calcium aluminate slags, anorthite cakes and ash of low-temperature combustion of Ekibastuz coals with the output of end products. It shows the advisability of reorientation of the raw materials base of the Pavlodar aluminium plant from bauxites to self-disintegrated slags produced from ash slag of Ekibastuz coals, and of using released capacities of sintering process stage for the production of construction materials.