影响大布铀矿床原地爆破浸出效果的因素分析

Analysis of factors affecting the effect of stope leaching

大布铀矿床桃山矿田铀矿石原地爆破筑堆浸出工业试验与工业试生产的采场浸出率及浸出周期相差较大,经过分析比对,认为爆破方法及布液方式是影响浸出率及浸出周期的主要因素。提出采用分层深孔挤压爆破筑堆方式来减少筑堆矿石的大块率,采用有效的布液方式来增加溶浸剂与矿石接触的全面性,以及引进细菌浸出等手段来提高浸出率、缩短生产周期的建议。

The industrial test and industrial trial production of stope leaching were carried out at Taoshan orefield of Dabu deposit.The results of test and trial production showed obvious differences in leaching rate and leaching time.Compared with industrial trial production of stope leaching,the leaching rate of industrial test was higher,and leaching time was shorter.It was considered that the blasting method and liquid arrangement were the main factors affecting the leaching rate and leaching time according to analysis.So we put forward the following suggestions：the technique of deep hole slicing tight-face blasting was used to reduce the yield of lump ores,the effective liquid arrangement methods were adopted to make the lixiviant infiltrating throughout whole ore heap,and bacterial leaching was introduced.