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我国有大量的低品位难选氧化铜矿石资源,急需寻找经济合理的处理方案。稀硫酸浸出低品位(含铜品位小于1％的)难选氧化铜矿的湿法冶金工艺,国外发展很快,新建的大型硫酸浸出厂最近相继投产。原因主要有二:其1,国外为防止铜、铅、锌等硫化矿在火法冶炼过程中产生的二氧化硫的污染,有的(如美国等)特别规定了从入炉原料中必须回收95％以上的硫。目前普遍采用双接触法制硫酸,造成硫酸生产逐渐过剩,需要为硫酸寻找销路。其2.随着生产的发展,对铜的需要量逐年增加,解决难选氧化铜的处理问题日趋迫切,虽然曾进行过大量的试
China has a large number of low-grade refractory copper oxide ore resources, the urgent need to find an economic and rational treatment programs. Dilute sulfuric acid leaching low grade (copper grade less than 1%) refractory copper oxide hydrometallurgical process, the rapid development of foreign countries, the new large-scale sulfuric acid leaching plant has been put into operation recently. There are two main reasons: First, foreign countries in order to prevent sulfur dioxide copper, lead, zinc and other sulfur dioxide produced in the pyrometallurgical process of pollution, and some (such as the United States, etc.) Specified from the furnace raw materials must be recycled 95% The above sulfur. At present, the double-contact method for the production of sulfuric acid is commonly used, resulting in gradual excess of sulfuric acid production and the need to find a market for sulfuric acid. 2. With the development of production, the demand for copper increases year by year, and the problem of handling the refractory copper oxide is becoming more and more urgent. Although a large number of tests have been conducted