Beijing Key Laboratory of Rare and Precious Metals Green Recycling and Extraction of Metal

Beijing, China

Beijing Key Laboratory of Rare and Precious Metals Green Recycling and Extraction of Metal

Beijing, China
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Zhao H.,University of Science and Technology Beijing | Zhao H.,Beijing Key Laboratory of Rare and Precious Metals Green Recycling and Extraction of Metal | Zhang L.,University of Science and Technology Beijing | Zhang L.,Beijing Key Laboratory of Rare and Precious Metals Green Recycling and Extraction of Metal | And 3 more authors.
International Journal of Chemical Reactor Engineering | Year: 2017

The multiphase fluid mixing and bubble motion in a scale-down Isa smelting furnace with a top submerged lance were investigated through cold water model experiments. The mixing time in the liquid bath was determined by a novel criterion, and the bubble formation frequency and gas-liquid contact area were also measured by high-speed photographing. The empirical equations of mixing time (Tm) relating to mixing energy were Tm,s=913-0.5= 913for solid tracer and Tm,l=624-0.48for liquid tracer, respectively. The mixing time trended down with the increasing of bubble formation frequency, affected slightly by the bubbles with small size and decreased obviously when increasing the gas-liquid contact area. The optimal conditions of gas flow rate, bath height, lance submerged height and lance diameter to guarantee high-efficiency mixing and low-level surface fluctuation/splashing were obtained. © 2017 Walter de Gruyter GmbH, Berlin/Boston 2017.

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