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WhatsApp: +86 182217550731. Introduction. CG is a residue produced from the processing of coal mining and coal washing. It has been estimated that CG accounts for about 10–15% of raw coal production (Qureshi et al., 2020).A large amount of CG was piled in wastelands over the last decades due to the rapid growth of the mining industry in China.
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WhatsApp: +86 18221755073One of the four coal combustion products (CCPs) produced as a byproduct of burning coal are fly ash, which is divided into two main categories: Class C and Class F. Class C fly ash is created when lignite and subbituminous coal are burned. Burning anthracite, also known as bituminous coal, however, results in Class F fly ash [95].
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WhatsApp: +86 18221755073Mining saw increased cost for safety measures and social distancing measures related to the pandemic, while coal prices remained low. These factors, among others, mean that a large share of the world's coal mines were not able to operate profitably in 2020, with better economics for coking than for thermal coal.
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