我厂尾矿堆场地处高原,设计面积为12km~2。尾矿矿浆中-200目细粒占85％,浓度为15％。采用矿浆管道输送、分管放散的方法筑坝。在分管管路上设有阀门850个。过去使用的是普通平行板铸铁闸阀。这种闸阀到冬季生产期,有80％以上的被冻裂,严重影响生产,维修量剧增。还有部分阀门由于长时间没 I tailings dump site is located in the plateau, the design area of ​​12km ~ 2. Tailings pulp -200 mesh fine particles accounted for 85%, a concentration of 15%. The use of slurry pipelines, in charge of the method of releasing dam. There are 850 valves on the pipeline. In the past is the use of ordinary parallel plate cast iron gate. This valve to the winter production period, more than 80% of the cracks have been a serious impact on production, the surge in maintenance. There are some valves because a long time no