无机/有机助磨剂对石英磨矿动力学模型参数的影响研究

Study on the Effect of Inorganic/organic Grinding Aids on the Kinetic Model Parameters of Quartz Grinding

以石英为磨机给料,通过添加6种助磨剂(无机类助磨剂焦磷酸钠、硫酸铝以及三聚磷酸钠;有机类助磨剂丙三醇、柠檬酸以及乙基黄原酸钾)进行湿式磨矿试验,建立了助磨剂添加前后石英粉磨的m阶磨矿动力学模型,系统分析了助磨剂对模型参数和磨矿速率的影响。研究表明经过磨矿时间10 min后,用量0.5%三聚磷酸钠使得磨矿产品中-0.074 mm含量增加7.44百分点,用量0.5%柠檬酸使得磨矿产品中-0.074 mm含量增加7.00百分点;助磨剂改变了模型参数k和m的值,整体磨矿效果取决于k和m的综合效应;三聚磷酸钠作用下,-1+0.45 mm粒级石英磨矿速率的增量最大,柠檬酸作用下,-0.45+0.18 mm粒级石英磨矿速率的增量最大。

Quartz was used as the feed material of the mill,and six grinding aids(inorganic grinding aids:sodium pyrophosphate,aluminum sulfate,and sodium tripolyphosphate;organic grinding aids:glycerol,citric acid,and potassium ethylxanthate)were added to conduct a wet grinding test.The m-order grinding kinetic model of quartz grinding before and after the addition of grinding aids was established,and the effects of grinding aids on the model parameters and grinding rate were systematically analyzed.It was shown that after 10 min grinding,the amount of 0.5%sodium tripolyphosphate increased the−0.074 mm content of the grinding products by 7.44 percentage points and the amount of 0.5%citric acid increased the−0.074 mm content of the grinding products by 7.00 percentage points.The grinding aids changed the values of model parameters k and m.The overall grinding effect depended on the combined effect of k and m.The increment of−1+0.45 mm quartz with sodium tripolyphosphate grinding rate is the largest,and the increment of−0.45+0.18 mm with citric acid grinding rate is the largest.