In this study the comminution methods of graphite bearing ore were compared by using five different crushing methods, namely a jaw crusher, a roll crusher, uniaxial compression tests, and a new type of continuously compressing crushers. These new continuously compressing crushers were available in laboratory and pilot scales. The particles in the + 1700 µm size class produced by continuously compressing crushing were coarser and rougher in texture compared to the rounded particles produced traditionally by a jaw crusher. In the size class −100 µm, most of the graphite flakes were observed independently in the products of each of these crushing methods. The liberation of ultra-coarse-grained graphite flakes in size class + 300 µm was most observed after pilot-scale continuously compressing crusher. The shape and enrichment of the graphite flakes were very similar after both laboratory and pilot scale continuously compressing crushers. In contrast, the graphite flakes produced by jaw crusher appeared as broken particles in the form of accumulation of several layered and non-independent graphite flake structures. The results of this study demonstrate that the new innovative continuously compressing crushing method enables the enrichment of coarser and cleaner graphite, which has a much higher value and wider industrial applications compared to amorphous and fine-grained graphite.

中文翻译：

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连续压缩破碎走向干法加工，石墨矿石的测试


本研究采用颚式破碎机、辊式破碎机、单轴压缩试验和新型连续压缩式破碎机五种不同的破碎方法对含石墨矿石的破碎方法进行了比较。这些新型连续压缩破碎机可用于实验室和中试规模。与传统颚式破碎机生产的圆形颗粒相比，通过连续压缩破碎生产的 + 1700 µm 尺寸级别的颗粒在质地上更加粗糙。在-100 µm 尺寸级别中，在每种破碎方法的产品中独立观察到大多数石墨片。在中试规模的连续压缩破碎机后，最容易观察到尺寸等级 + 300 µm 的超粗粒石墨片的释放。经过实验室和中试规模的连续压缩破碎机后，石墨片的形状和富集度非常相似。相比之下，颚式破碎机生产的鳞片石墨表现为破碎颗粒，呈若干层状、非独立的鳞片石墨结构堆积的形式。这项研究结果表明，新的创新连续压缩破碎方法能够富集更粗、更清洁的石墨，与非晶和细粒石墨相比，其具有更高的价值和更广泛的工业应用。