从2012年5月开始，大岗山水电站大坝人工骨料加工系统生产的成品砂含水率一直偏高，现场采取了加密盲沟、完善截排水系统和防雨棚、适当降低石粉含量等措施之后，效果仍不明显。为此，大岗山公司组织对料源质量进行了分析研究，并开展了相应的试验。结果发现含水率偏高的主要原因是大量细颗粒表面裹有保水物质，而第三筛分车间为干法生产，无法去掉保水物质。根据含水率偏高的原因，对砂石系统进行了改造，解决了成品砂含水率偏高的问题。%The production of artificial aggregate processing system for dam construction of Dagangshan hydropower station star-ted in May, 2012. Due to strong water-retaining property of sand product, the water content is higher. The measures of increas-ing blind ditches, perfecting water intercepting and drainage system, properly reducing stone powder content etc. , were adopted but failed. For this reason, Dagangshan company analyzed the material sources and carried out some related tests. The analysis results showed that the main cause was hydrophilic substance on the sand product that was difficult to remove due to dry process production in No. 3 screening plant. In view of the cause, the aggregate processing system was improved and satisfied effect was obtained.
展开▼
