西藏地区超基性岩型细粒级金刚石的选矿,在国内还没有先例,国外也不多见。含金刚石的矿石有原生矿和砂矿两种类型,而原生矿又分为铬铁矿和橄榄岩两种类型,其矿物组成主要是,铬铁矿和橄榄石;砂矿中主要矿物为石英和长石。从矿物组成来看,显然,不能用选金伯利岩中金刚石的工艺流程来选别该种金刚石,须采用新工艺流程。 In Tibet, ultrabasic rock type fine-grained diamond beneficiation has not yet been preceded in China and it is rare in foreign countries. The diamond-bearing ores have two types of primary ore and placer ore, and the primary ore is divided into two types of chromite and peridotite. Its mineral composition is mainly chromite and olivine. The main minerals in the ore are quartz And feldspar. From the point of view of mineral composition, it is obvious that the diamond can not be selected by the process of diamond selection in kimberlite, and a new process flow must be adopted.