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搅拌磨机被视为将物料微米级化最为有效的设备之一,目前已广泛用于微细粒物料的生产。近来,许多工业部门对超细颗粒的需要量都在不断增加。本实验利用搅拌磨机内给料颗粒的相互摩擦来获得亚微米级颗粒。磨机用不锈钢制成,容积约5.5L,有12个搅拌叶轮片。试样是石灰石。本实验对搅拌速度和物料粒度这两个操作参数进行了考察。45μm以上的产品采用筛分法检测其粒度,而45μm—0.17μm粒级产品的粒度分布利用激光衍射散射法检测。采用产品中增加的亚微米粒级量来评价磨矿的状态。本文确定了生产亚微米级颗粒时能耗最低情况下的搅拌叶轮转速。研究发现,搅拌自磨是一种生产亚微米级石灰石的有效方法。
Stirred mills are considered one of the most effective devices for micronizing materials and are now widely used in the production of fine-grained materials. Recently, the demand for ultrafine particles in many industrial sectors has been on the rise. In this experiment, the feed particles in the agitator were rubbed with each other to obtain submicron particles. Made of stainless steel mill with a capacity of about 5.5L, with 12 impeller blades. The sample is limestone. The experiment on the stirring speed and material size of the two operating parameters were investigated. Products with a size of 45 μm or more were examined for particle size by sieving, while particle size distributions for the 45 μm-0.17 μm size fraction were measured by laser diffraction scattering. The amount of sub-micron grain size added to the product was used to evaluate the state of grinding. This paper identifies impeller speeds at the lowest energy consumption for the production of sub-micron particles. The study found that mixing self-grinding is an effective method for producing sub-micron limestone.