Numerical Simulation and Application of an Oxygen-Enriched Side-Blown Smelting Furnace for the Treatment of Electroplating Sludge

Biwei Yang, Wei Liu (), Fen Jiao, Lin Zhang, Wenqing Qin and Shanqin Jiang
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Biwei Yang: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Wei Liu: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Fen Jiao: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Lin Zhang: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Wenqing Qin: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Shanqin Jiang: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China

Sustainability, 2023, vol. 15, issue 13, 1-25

Abstract: In the oxygen-enriched side-blown smelting furnace for the treatment of electroplating sludge, fluent was used to simulate the gas–liquid two-phase flow process. The relationship between the lance diameter, lance inclination, bath depth, and the bath evaluation indicators were studied, and the oxygen lance spacing was optimized. The results show that the high velocity and high gas rate areas were near the oxygen lance, while the stirring dead zones with low velocity appeared in the central and bottom areas of the molten pool. The key parameters were optimized using single-factor analysis and multifactor comprehensive optimization. The results showed that the bath evaluation indicators were all at good levels under the optimal parameter conditions. These were comprehensively obtained as the following: the lance diameter was 25 mm, the lance inclination was 15°, the lance spacing was 1050 mm, and the bath depth was 1500 mm. The industrial test carried out in an environmental protection enterprise in Guangdong achieved satisfactory results. The test shows that the electroplating sludge containing 7.24% Cu can be melted at 1300~1400 °C to obtain matte. Compared with industrial copper slag, the smelting slag has a higher CaO and a lower Fe content.

Keywords: electroplating sludge; oxygen-enriched side-blown furnace; gas–liquid two-phase flow; numerical simulation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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