In order to reveal the volatilization characteristics of lead-containing slag, volatilization dynamics model of lead-containing slag with mass ratios of FeO/SiO2=1.8 and CaO/SiO2=0.6 at high temperature was developed using TG technique based on PbO?FeOx?CaO?SiO2?ZnO system. The effect of PbO content on volatility in lead slag was discussed. The volatile mechanism of lead slag was revealed combined with the chemical composition analysis and element analysis of the final slag. The results showed that it was exactly the severe volatilization of PbO at 700?1450℃ that lead to the change of lead composition and the deviation of its performance. Average mass loss rate is about 18.58% of slag containing 20wt% lead at 700?1450℃. The process of high temperature volatilization for lead-containing slag is controlled by 3D diffusion, the factors that affect the volatile are mainly the contents of PbO and silicon oxygen compound ion.
Yaru CUI Guohua WANG Junxue ZHAO Ziliang GUO Hongliang TANG Haoyue FAN
. Volatilization Kinetics of PbO-FeOx-CaO-SiO2-ZnO Lead-bearing Slag[J]. The Chinese Journal of Process Engineering, 2018
, 18(2)
: 393
-398
.
DOI: 10.12034/j.issn.1009-606X.217302
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