Research on the Diffusion of Ozygen in the Low-Temperature Ozidation of Sulfide Ore Stockpile in Confined Storage
Spontaneous combustion of sulfide ores is one of the major disasters of non-coal mines, especially in the course of ore exploitation, storage and transportation, the ores engender oxidative reaction and emit heat as a result of they were exposed to oxygen widely, with the heat accumulating the temperature of the ore pile continually rise and lead to spontaneous combustion. The previous works indicate that oxygen is one of the necessary factors to spontaneous combustion of sulfide ore, it is very significant to study the oxygen diffuse rule in the ore pile. Based on the low temperature oxidation theory of spontaneous combustion, gas diffusion theory in the loose medium and referred the previous research results of the coal on the spontaneous combustion, the paper analyzed the basic movement form of oxygen transmission and diffuseness, established the mathematical model of oxygen delivery process in sulfide ores pile, chose the refined ore storehouse of Anhui province Dongguashan Copper Mine as study object, used the computational fluid dynamic software to simulate the diffuse of oxygen and temperature change process, and discussed affect extent of some factors for spontaneous combustion of sulfide ore in the simulation process and the correlation between different factors. The research found that environment temperature, airflow rate, ore type and humidity play an important role in the ores oxidation reaction and spontaneous combustion, their influencing extent change with the size of the ore storehouse, storage time and the surrounding environment variations, it is useful to improve the spontaneous combustion theory of the sulfide ores and enhance the capacity of control and prevent the spontaneous combustion of sulfide ores.
sulfide ore spontaneous combustion ozygen diffusion digital simulation computational fluid software
Li Ming Wu Chao Li Zijun Pan Wei
School of Resources and Safety Engineering, Central South University, National Research Center of Safety Science and Technology for Metal Mines, Changsha 410083, China
国际会议
The 3rd International Symposium on Modern Mining & Safety Technology Proceedings(第三届现代采矿与安全技术国际学术会议)
辽宁阜新
英文
299-304
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）