Zinc Evaporation from Brass Scraps in the Atmosphere of Inert Gas.
Materials (Basel, Switzerland)(2023)
Abstract
A description of the process of metal evaporation from liquid alloys at an atmospheric pressure has a practical value for both the smelting and remelting of their scraps. The quantities of volatile components that are eliminated in these processes depend on many factors of which the type of melting device, the method and conditions of the process performance, the alloy composition and the kind of applied atmosphere are of the greatest importance. In this paper, the results of the research on zinc evaporation from brass scraps containing 10.53 wt% Zn are presented. The experiments were conducted using the thermogravimetric method at 1080 ÷ 1240 °C in a helium atmosphere. In the research, the levels of zinc removal from copper ranged between 82% and 99%. The values of the overall mass transfer coefficient for zinc , determined based on the experimental data, ranged from 4.74 to 8.46 × 10 ms. The kinetic analysis showed that the rate of the analysed process was determined by mass transfer in the gas phase.
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Key words
brass,metal evaporation process,metal scraps,thermogravimetry
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