Hydrothermal Sulfidation of White Lead with Elemental Sulfur

Abstract

Hydrothermal sulfidation of pure white lead with elemental sulfur has been studied in the present paper. The variables considered in the study were temperature, time, particle size and elemental sulfur fraction in the reacting mixture. Temperature and time were the most two important factors, with an increase in temperature and holding time the sulfidation extent of lead improved greatly and the constituent of products changed a lot. At temperatures above 140°C, PbS and PbSO4 were the only stable reaction products in the sulfidation of white lead. The experimental data indicated that under the hydrothermal conditions with a particle size of -58+48 μm and sulfur fraction in reacting mixture of 8% at 140 °C for 90 min, and 86% of lead sulfidation extent was achieved.

Study on surface modification of cerussite by thermochemical processing with pyrite

“…Recently, multiple methods, including mechanochemical processing (Yuan et al, 2012;Li et al, 2017), hydrothermal treatment (Li et al, 2012;Liang et al, 2012) and sulfidation roasting (Li et al, 2010;Zheng et al, 2015;Chen et al, 2019), have been reported for improving the sulfidation performance. Li et al (2017) and Yuan et al (2012) adopted a method of co-grinding lead oxide with sulfur under mild conditions prior to flotation.…”

“…The results showed that the floatability of lead oxide cannot be satisfactory attributed to the disproportionation reactions of sulfur, resulting in the formation of PbSO4 and PbS. Liang et al (2012) and Li et al (2012) reported the hydrothermal sulfidation of lead-containing materials and their flotation performance. It was confirmed that the sulfurized lead oxide minerals floated well.…”