磨矿介质形状对橄辉岩型钒钛磁铁矿磨矿动力学影响研究

为了更深入地研究橄辉岩型钒钛磁铁矿磨矿行为,采用钢球、钢锻作为磨矿介质在不同磨矿时间下进行了分批次磨矿试验,研究了点、线不同接触方式对橄辉岩型钒钛磁铁矿磨矿动力学过程与产品分布,重点考察了磨矿动力学参数、比破碎速率、磨矿产品分布特性。研究结果表明：两种介质下的磨矿动力学均符合标准动力学方程,相关参数k与m值均与粒径呈指数函数关系；钢锻介质更适合选择性磨矿,钢球介质下的细粒级产品较钢锻介质多,磨矿时间越大,产品分布越均匀,短时间内,钢锻介质对粗颗粒的破碎效果要优于钢球介质；以上研究结果可为橄辉岩型钒钛磁铁矿磨矿工艺参数提供一定的理论基础与参考价值。

A Study of the Grinding Kinetics on Pyroxenite-Vanadium-titanium- Magnetite with Different Medium Shape

To study the grinding process of Pyroxenite-Vanadium-titanium-Magnetite in more depth. The steel balls and steel forgings were adopted as grinding mediums in batch grinding experiments at different grinding time. The grinding kinetics and grinding products distribution were analysed with the different contact ways such as point contact and linear contact. The grinding kinetics parameters, specific rate of breakage and grinding products distribution properties were mainly studied. The results shown that the grinding kinetics process with two different medium satisfied to the standard grinding kinetics equation and the relationship between the relevant parameters and product sizes are exponential functions. The steel forgings were beneficial to the selectivity grinding process and the size of grinding products in steel balls was smaller than the products in steel forgings. The products distributed evenly with the increasing grinding time. The steel forgings were beneficial to grind the large particles in short grinding time compared with the steel balls. The above results can provide theoretical foundation and valuable reference for the grinding process of Pyroxenite-Vanadium-titanium-Magnetite in future.