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China developing new flyash uses as building industry slows

China’s coal-fired power plants produce about 600 million tons fly ash annually, which has caused severe economic and environmental problems. This paper first describes briefly the production and utilization status of coal fly ash in China. Then it analyzes the main challenges to the fly ash utilization in China due to the conflict between the huge amount of production of fly ash and the depressed consumption of fly ash, as well as the increasing driving forces in environmental protection. Subsequently, the new developments of fly ash utilization in China, including valuable elements extraction, geopolymer production, fly ash-based ceramics synthesis and soil desertification control are introduced in detail. CFA can mix with cement, gypsum and clay, etc. to produce autoclaved aerated concrete blocks. Because no high temperature is required. This technique reduces air pollution and decreases energy consumption, so the above utilization ways are very popular in China.

Revision Date:  6/27/2019

Tags:  221112 - Fossil Fuel 化石燃料, Flyash, Production, Utilization, Environmental Protection, China

India has a flyash disposal problem

India produced about 170 million metric tons of fly ash in 2017. Hundreds of millions of tons are presently stored in ponds which are causing contamination of ground water.

Revision Date:  6/25/2019

Tags:  221112 - Fossil Fuel 化石燃料, Dept of Science & Technology (DST) India, Flyash, Disposal, Production, Utilization, India