Table of Contents

Preface Introduction Introduction Extraction of aluminum metal (Hall-Heroult process) Other aluminum extraction processes ALCOA aluminum-chloride process Carbothermic reduction of aluminous ores The aluminum-carbide process Reduced temperature aluminum production process Wire-rod drawing plant Wastes generated by aluminum smelter plants Introduction Spent pot liners Anode butts Red mud Coal rejects/carbon dusts and coal ash Treatment of the wastes and qualityof byproducts Treatment of spent pot liner Treatment of red-mud Treatment of waste emulsion generated by wire-rod mills Utilization of wastes (byproducts) Byproducts from treatment of spent pot liner and anode-butts Colloidal graphite and dry lubricants Production of pyrogenic silica at relatively lower temperature Preparation of pencil lead Making dry cell electrodes Production of carbon refractories Preparation of silicon-carbide from spent pot liner Preparation of blast furnace tap hole and runner/trough mass Preparation of aluminum plant anodes Absorber for heavy metals, dyes and oils Preparation of mould coating for batch casting of iron and steel Recovery of fluorine as aluminum fluoride Utilization of red-mud Removal of ferric oxide Forming electroceramic bodies Making glazes Utilization of iron filtrate solution Extraction of titanium Utilization of coal rejects/carbon dust/coal ashes Utilization of coal rejects and coal dusts Utilization of coal ash Techno-economic feasibility of some selected processes References Index

About the Author

Dr B. Mazumder is an emeritus scientist, Council of Scientist & Industrial Research, at IMMT research laboratory Bhubaneswar, Orissa. He has more than 15 patents fi led in India, USA and European countries. He has more authored 7 books and got published 35 papers in India as well as International journals. His research interest lies in the area of high temperature science which includes carbon technology, molten salt chemistry, ferrous and nonferrous metallurgy, as well as energy technology.