摘要
通过室内细菌脱硫柱浸实验,将硫化矿石颗粒表面的硫降低到临界值以下,使脱硫后矿石自燃倾向性等级下降.结果表明,44d最大脱硫率可达61.82%,脱硫率随着时间延长而逐渐增大.对矿石自燃倾向性分析显示,硫化矿石的5d氧化增重率从2.044%降低到0.902%,自燃点从209.6℃升高到319.8℃,自燃倾向性等级由Ⅰ级降为Ⅲ级,降低了硫化矿石的自燃风险.
Bacterial desulfurization and column leaching were used to decrease the content of sulfur in sulfide ores＇ surface to a extreme low level even below the critical value so that the spontaneous combustion tendency of the desulfurized ores weakened.The experiment results show that the maximal desulfurization rate can reach 61.82% after 44 d treatment,and gradually increases with prolonging time.Based on the analysis of the spontaneous combustion tendency of sulfide ores,it is indicated that the oxidation weight gain rate of sulfide ores in 5 d decreases from 2.044% to 0.902% while the ores＇ spontaneous combustion point increases from 209.6 ℃ to 319.8 ℃.As a result,the spontaneous combustion tendency downgrades from level Ⅰ to level Ⅲ and the risk of spontaneous combustion is lowered.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2011年第4期395-399,共5页
Journal of University of Science and Technology Beijing
基金
国家自然科学基金资助项目(No.50774011)
新世纪优秀人才支持计划资助项目(NECT--07--0070)
国家自然科学重点基金资助项目(No.50934002)
长江学者和创新团队发展计划资助项目(No.IRT0950)
关键词
硫化矿
自燃
脱硫
细菌
sulfide minerals
spontaneous combustion
desulfurization
bacteria
