Study On The Mechanism Of Spontaneous Combustion Of Sulfide Oresand Risk Prediction Technique

Spontaneous combustion of sulfide ores is one of the major hazard in mining of sulfideore deposits. Because of different experimental conditions, the existing experimental datacould not to be shared and lack of quantitative research about the spontaneous combustiontendency of sulfide ores, the control techniques research about the sulfide ores of spontaneouscombustion had been restricted. In this paper, with the methods of combination of theory andthe experiment, reaction process of the sulfide ores of spontaneous combustion, spontaneouscombustion Mechanism, risk prediction technique and tendency determination technique hadbeen researched systemically.On the basis of analysis phase and composition of sulfide ores, to study its various stagesspontaneous combustion thermal reaction.It could summed up that the reaction process ofsulfide ores spontaneous combustion, in essence, was a continuous compoundly process ofsulfide ores with oxygen. That would be provided a reliable basis for the study thespontaneous combustion mechanism of sulfide ores.Through the sulfide ores self-heating experiment, the oxygen uptake speed experimentand the fire point experiment, to study the determination targets of sulfide ores of spontaneouscombustion tendency, the method and the standard. In order to provide the data supports forthe proposes and the confirmation of the compound mechanism of sulfide ores and oxygen.Based on the systematic analysis about spontaneous combustion of sulfide ores reactionprocess, Put forward the compound mechanism of sulfide ores and oxygen. And uses variousstages characteristic temperatures of reaction process of sulfide ores spontaneous combustionto confirm it, rich and perfect the mechanism of sulide ores spontaneous combustion systeminfo.Through calculation influence coefficient and relativity coefficient of various factors, Taking into account the risk grading standards for coal mines, the spontaneous combustiontendency of sulfide ores grading standards was put forward, In order to provide the reliablebasis for forecast model parameter and the boundary condition determination.Based on above mentioned theories and experiments, the spontaneous combustioncharacteristics of sulfide ores and the motion law of gas had been analyzed. The mathematicalmodels of spontaneous combustion of sulfide ores pile was set up, by analyzing the heatproduction and heat dissipation characteristics of the sulfide ores pile.The research of the spontaneous combustion reaction process and the mechanism ofspontaneous combustion of sulfide ores, the spontaneous combustion tendency of sulfide ores,this could provide a theoretical basis for take effective preventive measures when miningdesign was carried out of sulfurous ore deposits. It has great significance for prevention andtreatment for the spontaneous combustion of sulfide ores.