印度的天然石墨矿床含大量的脉石矿物,需要选别以满足大多数工业部门的特殊需要,但是选别方法的费用必须低。尽管石墨的浮游性很好,但由于普通浮选机工作的固有缺点,需要一系列浮选槽进行多段作业。多段浮选的基建费用高,使生产成本往往较高。因此,浮选法一般只用于石墨矿的粗选,而进一步富集往往采用化学方法。印度生产石墨的实践表明,即使从50％ India’s natural graphite deposits contain large amounts of gangue minerals that need to be selected to meet the special needs of most industrial sectors, but the cost of sorting methods must be low. Despite the good floatability of graphite, due to the inherent disadvantages of conventional flotation machines, a series of flotation cells are required for multi-stage operation. Multi-stage flotation of high cost of infrastructure, the production costs are often higher. Therefore, the flotation method is generally only used for rough selection of graphite mines, and further enrichment often use chemical methods. India’s practice of producing graphite shows that even from 50%