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目前,我国各选矿厂,在选别硫化铜时,均采用三种主要药剂:石灰、乙基黄药和二号油(起泡剂)。但是制造二号油的原料——松脂,是很不容易得到的,由于不能保证足够数量的二号油,则对铜矿的选矿的遍地开花会受到很大影响。最近南京铅锌锰矿为了解决这个问题,进行了二号油代用品的研究,同时在研究前,由于考虑到必须寻求价格低廉,并且容易得到的原料。经研究,决定用煤焦油的分馏产物之一——中油作为代用品,因为其中含有酚类和吡啶等,有作为浮选起泡剂的可能。
At present, all the concentrators in our country use three main agents when selecting copper sulfide: lime, ethyl xanthate and No. 2 oil (foaming agent). However, turpentine, the raw material for making No.2 oil, is not easy to obtain. Because it can not guarantee a sufficient amount of No.2 oil, the flowering of copper beneficiation will be greatly affected. In order to solve this problem, Nanjing Lead-Zinc-Manganese Mine recently carried out the research on No.2 oil substitutes, and also considered the need to find low-cost and readily available raw materials before the research. After the study, decided to use one of the coal tar fractionation products - CNOOC as a substitute, because it contains phenols and pyridine, etc., as a flotation foaming agent possible.