Journal
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
Volume 29, Issue 1, Pages 70-77Publisher
SPRINGER
DOI: 10.1007/s12613-020-2196-8
Keywords
Peirce-Smith converter; copper smelting; flow fields; mixing time; cold model experiments
Categories
Funding
- National Natural Science Foundation of China [51974018]
- Guangxi Innovation-Driven Development Project [AA18242042-1]
- Fundamental Research Funds for the Central Universities [FRF-TP-19-016A3]
- China Scholarship Council for the Chinese Government
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The distribution of flow zones and mixing time in a Peirce-Smith copper converter was studied, and a dimensionless equation with less than 5% error correlation of stirring and mixing energy was established. It was recommended to improve slag-making reaction by injecting a quartz flux through tuyeres or into the backflow point of the splashing wave through a chute.
Peirce-Smith copper converting involves complex multiphase flow and mixing. In this work, the flow zone distribution and mixing time in a Peirce-Smith copper converter were investigated in a 1:5 scaled cold model. Flow field distribution, including dead, splashing, and strong-loop zones, were measured, and a dimensionless equation was established to determine the correlation of the effects of stirring and mixing energy with an error of <5%. Four positions in the bath, namely, injection, splashing, strong-loop, and dead zones, were selected to add a hollow salt powder tracer and measure the mixing time. Injecting a quartz flux through tuyeres or into the backflow point of the splashing wave through a chute was recommended instead of adding it through a crane hopper from the top of the furnace to improve the slag-making reaction.
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