The discussion and analysis on acid in-suit leaching process current situation at a uranium deposit in Kazakhstan

two acid in-suit leaching mines of CGNPC have been put into operation since 2009 in Kazakhstan. One mine located in Northern Kazakhstan province and the other located in Syrdarya province. Furthermore, two mines belong to different types uranium deposit and have different geology and hydrogeology characteristic. Some advanced processes used in acid in-suit leaching mines have been applied during production phase. First of all, well sealing with betonies rings is a new kind of well completion process, which can obviously improve well completion efficiency and quality. The results indicated that precision and reliability of well completion have been promoted.Secondly, a chemical well-flushing process used by ammonium hydrogen fluoride is a highly effective method, which can extend well-flushing cycle and reduce the labor. In the same time, in this paper, some kinds of processes have been introduced. A large proportion of its have not been described at home. The main purpose is to share academic achievement with staffs and push forward progress in ISL. (authors)