摘要：为了提高石英矿的粉磨效率,采用天然石英矿为原料,系统地研究热力粉碎石英矿的粉磨特性。结果表明,热力粉碎能够改变石英矿的物理结构,大幅度降低矿块的硬度,显著提高石英的粉磨效率;影响石英热力粉碎效果的主要因素有煅烧温度、煅烧时间和煅烧粒度,煅烧温度大于600℃后可以实现石英的有效粉碎,以800~900℃为宜,煅烧粒度越小,其粉磨效率越高,煅烧时间与矿块的尺寸有关,其长短由石英矿块内外温度达到平衡的时间来确定;热力粉碎石英与未经热力粉碎的石英相比,不仅大大提高了磨矿效率,而且磨矿产品的粒度分布更窄、更细、更均匀。

关键词：热力粉碎；石英；磨矿速率；粒度

Abstract：In order to improve the grinding efficiency of quartz,the grinding characteridtics of natural quartz and calcined quartz by thermal treatment was systematically studied. The results show that the grinding efficiency of calcined quartz is improved dramatically in that the physical structure of the quartz can be changed by thermal treatment to reduce its hardness. The main effect factors of the quartz thermal treatment include calcination temperature, time and the size of quartz. Calcination temperature should be higher than 600 ℃ to achieve effective grinding of quartz, and it is usually set between 800 to 900 ℃. The smaller size of quartz is, the higher grinding efficiency is. And calcination time is related to the size of quartz, which is determined by the balance time at which the quartz internal temperature is equal to its externa temperature. Comparing with natural quartz, the grinding efficiency of calcined quartz is greatly improved and the size of its grinding product is finer and more uniform.

Keywords: thermal grinding；quartz；grinding rate；size