磁选粗精矿MD-30阴离子捕收剂的研制及应用

介绍了MD-30系列浮选药剂的合成工艺条件和产品质量标准.经实验室试验证明,该浮选药剂生产工艺较简单,可操作性强,产品质量稳定,浮选性能优异,且无毒,无污染,耐温性较好.在尾矿磁选粗精矿铁品位60.22%、磨矿细度-0.076 mm占90%的条件下,获得了最终铁精矿品位66.36%、产率85.84%、回收率94.59%的铁精矿.按细筛-磨矿-中磁-反浮选流程建设的选矿厂已生产3年,取得了显著的经济效益.     

我国石油战略储备体系的建立与完善刍议

石油战略储备是关系到我国国家安全的重大问题。一方面,要建立和完善实物储备或现货储备,即讨论和呼声较高的石油战略储备,进一步完善相关制度设计;另一方面,还应抓紧建设战略储备体系的短板——石油期货储备。通过建立石油期货市场,加快推进石油期货交易,把金融安全与石油安全合并考虑,把石油现货储备、期货储备与外汇储备密切结合起来,建立外汇储备与石油储备的转换机制,使我国规模庞大的外汇储备服从、服务于国家的经济安全,提高国家的石油保障能力,从根本上保障我国的石油安全。     

不同岩性条件下预应力锚索锚固力损失规律研究

There are many and complex factors that affect the anchoring effect of prestressed anchor cables, and each factor also affects each other. The loss of anchoring force is closely related to the properties of rock and soil. Through theoretical analysis, experimental research, numerical simulation, and other methods, the influence mechanism of creep deformation and compression deformation of rock and soil on anchoring force loss is studied. The law of prestressed anchor cable anchoring force loss caused by hard rock, weak rock, broken rock, and soil is studied. The research shows that the properties of rock and soil are different, The loss of anchoring force caused by prestressed anchor cables is also different: the better the quality of the rock and soil, the smaller the loss of anchoring force under the same initial anchoring force conditions. This research achievement can guide the design, construction, and operation management of anchoring engineering, which is beneficial for improving the economic and social benefits of anchoring engineering     

山东牟平某尾矿选铁工艺研究

为了综合开发利用尾矿资源，经实验室选铁工艺试验研究，将铁品位为15．30％的废弃固体尾矿进行再选回收，使铁精矿品位可达65．0％以上。