钼和铜矿山废石X荧光预选的可行性研究

Research on X-ray pre-sorting feasibility of gangue in molybdenum and copper mine

从废石的粒度组成、显明度特性以及所选定的分选标志和废石中有用元素含量的相关程度3个方面,对陕西洛南地区钼矿废石和丹凤地区铜矿废石的可选性进行了研究。结果表明:上述2种矿山废石的粒度组成符合荧光入选要求;品位变异系数分别为475.0%和313.2%,莫氏指数分别为1.245和1.41,均显示这两类矿山废石不同矿块之间品位分布差距较大,适合采用荧光预选工艺进行预先富集;矿石特散比值与其中有价元素的含量有较好的相关关系,可作为矿石品位高低的判别标志。

The paper researched the washability of the gangue in molybdenum mine of Shaanxi Luonan and copper mine of Shaanxi Danfeng from the particle size constitution of the gangue, uneven level of grade and the correlation between selected sorting mark and the content of valuable element in gangue. The results showed： the particle size constitution of the above two kinds of gangue met the X-ray pre-sorting requirements; their grade variation coefficient was 475.0% and 313.2% respectively, Moseley＇s index was 1.245 and 1.41 respectively, which indicated the great difference in grade distribution of various ore blocks for the two kinds of gangue, thus X-ray pre-sorting was suitable for pre-beneficiation; there was excellent correlation between characteristic-scatter ratio of the ore and the content of valuable element, which could be used as the index of judging the ore grade.