Chemical Thermodynamic Mechanism of Sulfide Ores during Oxidization and Self-Heating Process
In this paper, a sum total of 29 chemical reaction equations for describing the oxidizing behavior of major sulfide ores were summarized systematically and their reaction heat was calculated in detail according to the chemical thermodynamic principle. Furthermore, the key equation of them, reaction velocity and other relevant features in various conditions were determined based on the experiment analysis. Meanwhile, a large scale field experiment was made in a mine by piling volumes of sulfide ore dumps in a stope and continuously measuring their temperature, SO2 concentrations and environmental conditions during spontaneous combustion. The most practical and complete chemical thermodynamic behavior and features were discovered in the experiment. These discoveries are identical with those achieved in laboratory. The research conclusions are of great significance for the control of mine spontaneous combustion of sulfide ore dumps.
sulfide ores oxidization self-heating chemical thermodynamic features underground mines
WU Chao LI Zijun LI Ming
School of Resources and Safety Engineering, National Research Center of Safety Science and Technology for Metal Mines, Central South University, Changsha 410083, China
国际会议
The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)
河南焦作
英文
2435-2440
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）