Does fly ash from coal-fired power plants a promising raw material for alumina production?

Dmitry Valeev – PhD, Senior researcher of Laboratory of sorption methods, Vernadsky Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Sciences. Lecture in English. Using coal for electricity and heat generation formed millions of tons of solid waste. Ash dumps hold large areas within the city, and the transportation of ash required large water consumption. The adjacent to ash dumps territories are poisoning. Living near ash dumps can lead to chronic lung diseases. However, ash contains metal oxides, in particular aluminum, which makes it possible to consider this type of raw material as a source of alumina production. How much ash is generated per year and how much total was accumulated in ash dumps in Russia? What are the major methods of ash utilization for alumina production? Who is Karl Bayer and what did he patent at the end of the 19th century? Why use hydrochloric acid instead of alkali? What is poly aluminum chloride coagulant? Does ash content the precious