氧化增重法测试硫化矿石低温氧化性参数优化

为更合理地选择硫化矿石低温氧化速率测定所用氧化增重法的测试条件,减小试验误差,采用室内试验、误差分析等方法探讨环境湿度、矿样初始含水率和预氧化时间等因素对氧化增重法测量结果的影响,完善氧化增重法的理论依据和测试条件。结果表明,初始含水率对5天增重率无显著性影响;把初始含水率设为6%,可使各亲水性不同的试验矿样处于相同水分环境下;设定试验时间为9天,其中矿样制备时间4天,测量时间5天,可提高试验数据精确度,节省时间并且符合实际;用体积增重率取代质量增重率,可使理论更正确,测试结果更合理。

Parameter Optimization of Oxidation Weight Increase Method for Oxidability Detection of Sulfide Ores at Low Temperature

The oxidation weight increase method is used to appraise the oxidability of sulfide ores at low temperature,which is reasonable,convenient and precision.In order to choose the conditions more appropriately and reduce the experiment error,the interior experiments,error analysis,etc,were selected to observe the effects of main factors such as humidity,moisture content and oxidation time on the final results.Moreover,the theoretical basis and experiment conditions of the oxidation weight increase method were improved.The results show that initial moisture contents have no significant influence on 5 days weight increase rates,that setting initial moisture content to 6% can guarantee that different hydrophilic ore samples are in the same water condition,that setting the test time to 9 days,including 4 days for preparation and 5 days for measuring,can improve the data accuracy,achieve efficiency and conform to reality.The adoption of volume weight increase rate instead of mass increase rate can make the theoretical basis more sounder,and the testing result more rational.