硫化矿石堆自热过程复杂度变化趋势
发布时间：2018-11-11 07:41
【摘要】：为揭示硫化矿石堆自热过程的突变特性,提出一种基于实测温度数据研究矿石堆复杂度的新方法。以某硫铁矿矿石样品为实验材料,应用自主设计的实验装置,室内模拟矿石堆动态自热过程。在对近似熵方法检测动力学结构突变的有效性进行验证后,应用小波技术与近似熵方法对自热过程中矿石堆的复杂度进行定量分析。研究结果表明:矿石堆近似熵在0.61~0.90之间,随着深度的增大,矿石堆复杂度呈先增大后减小的趋势;局部区域的自热过程产生了明显突变,突变温度介于117.6~121.2℃之间;矿石堆复杂度变化趋势可分为3个阶段:相对平稳阶段、逐渐增大阶段和逐渐减小阶段。在复杂度逐渐增大阶段,矿石堆局部区域产生了明显自热。
[Abstract]:In order to reveal the abrupt characteristics of the self-heating process of sulphide ore stacks, a new method based on the measured temperature data is proposed to study the heap complexity of sulphide ores. A pyrite ore sample was used as the experimental material and a self-designed experimental device was used to simulate the dynamic self-heating process of the ore heap in laboratory. After validating the effectiveness of the approximate entropy method in detecting dynamic structural mutations, wavelet and approximate entropy methods are used to quantitatively analyze the complexity of the ore heap in the process of self-heating. The results show that the approximate entropy of ore heap is between 0.61 and 0.90. With the increase of depth, the complexity of ore heap increases first and then decreases. The spontaneous heating process in the local region has obvious mutation, and the abrupt temperature is between 117.6N and 121.2 鈩，
本文编号：2324204
[Abstract]:In order to reveal the abrupt characteristics of the self-heating process of sulphide ore stacks, a new method based on the measured temperature data is proposed to study the heap complexity of sulphide ores. A pyrite ore sample was used as the experimental material and a self-designed experimental device was used to simulate the dynamic self-heating process of the ore heap in laboratory. After validating the effectiveness of the approximate entropy method in detecting dynamic structural mutations, wavelet and approximate entropy methods are used to quantitatively analyze the complexity of the ore heap in the process of self-heating. The results show that the approximate entropy of ore heap is between 0.61 and 0.90. With the increase of depth, the complexity of ore heap increases first and then decreases. The spontaneous heating process in the local region has obvious mutation, and the abrupt temperature is between 117.6N and 121.2 鈩，
本文编号：2324204
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