A bio-coke for anode production and the manufacturing method thereof
|Advisor:||Darvishi Alamdari, Houshang; Larachi, Faïcal|
|Abstract:||In aluminum industry, calcined petroleum coke is considered as the major component in anode recipe. There is a trend of degrading quality of petroleum coke as the level of impurities is increasing. This is important for the aluminum industry because these impurities reduce the anode performance and contaminate the produced metal. In addition, petroleum coke is a fossil source of carbon and CO2, produced during its consumption in aluminum electrolysis is considered as a greenhouse gas (GHG) with a well-known role in the global warming and climate changes. Due to its availability and massive worldwide production, wood charcoal is an attractive alternative for petroleum coke in production of carbon anode for aluminum smelting process. However, using charcoal in anode production is a big challenge since it does not meet the specifications required for anode making. The very porous and disordered carbon structure and its relatively high minerals content are considered as serious disadvantages. In addition, its density and electrical conductivity were reported to be lower than those of petroleum coke. This work explores the effect of heat treatment on properties of charcoal with the aim to bring them closer to the specifications required for anode making. At high temperature, the structural evolution of charcoal was detected using several techniques. In addition, various acid leaching conditions were used to reduce the ash content. Different calcination/acid leaching combinations were performed to attain the optimum treatment condition. The materials were then characterized for air and CO2 reactivity in order to assess their potential application in anode manufacturing.|
|Document Type:||Mémoire de maîtrise|
|Open Access Date:||24 April 2018|
|Collection:||Thèses et mémoires|
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