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针对硫化矿石吸氧速度常数呈现出的不规则周期性变化特征,通过R/S分析法对其进行分析。结果表明,在试验条件下,6种矿样吸氧速度常数的时间序列均体现出明显的Hurst现象,且Hurst指数均大于0.5;同时通过比较发现,矿样的氧化性与矿石吸氧速度常数的Hurst指数值具有一致性。由此可以看出,通过测定矿石吸氧速度常数并进行R/S分析,比较Hurst指数或分形维D值大小,可以得到矿样的氧化性大小,实现利用分形维对矿石氧化性进行表征,从而代替其他各项繁琐的试验工作。该研究为判断硫化矿石常温下的氧化性提供了新的思路和方法,具有一定的理论意义和应用价值。
In view of the irregular cyclical variation of oxygen uptake rate constants of sulfide ores, it was analyzed by R / S analysis. The results show that under the experimental conditions, the time series of oxygen absorption rate constants of six kinds of ore samples all show obvious Hurst phenomenon, and the Hurst exponents are all greater than 0.5. Meanwhile, the comparison of the oxidizability of ore samples and the oxygen uptake rate constant Hurst index value is consistent. It can be seen from the determination of ore oxygen rate constant and R / S analysis, comparison of Hurst index or fractal dimension D value, the oxide size of the ore can be obtained, the use of fractal dimension to characterize the ore oxidation, Thus replacing other tedious tests. The study provides a new idea and method for determining the oxidizability of sulfide ores at room temperature, which has certain theoretical significance and application value.