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底特律S60震源发动机故障分析及应对措施 被引量:2
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作者 孙军和 胡勇 +2 位作者 吴京凯 田建辉 霍继刚 《物探装备》 2016年第3期170-173,共4页
燃油的品质、沙漠中严酷的施工环境,都会直接影响到震源发动机的使用寿命。通过解剖有故障的震源发动机,发现发动机的气门碳化严重,气道和燃烧室都发现有细微的沙尘;用简易的机油酸化测试方法对机油进行检测,发现更换下来的机油呈现酸... 燃油的品质、沙漠中严酷的施工环境,都会直接影响到震源发动机的使用寿命。通过解剖有故障的震源发动机,发现发动机的气门碳化严重,气道和燃烧室都发现有细微的沙尘;用简易的机油酸化测试方法对机油进行检测,发现更换下来的机油呈现酸性。因此,我们采取了一些措施来应对这些问题,以延长震源发动机的使用寿命,并取得了一定的成效。 展开更多
关键词 震源发动 高温天气 机油酸化 沙尘环境 底特律S60
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Synthesis of glycerine-xanthate and its depressing mechanism in separation of marmatite from arsenopyrite 被引量:6
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作者 熊道陵 胡岳华 +1 位作者 覃文庆 何名飞 《Journal of Central South University of Technology》 EI 2006年第6期678-682,共5页
A small molecular organic depressor glycerine-xanthate was synthesized. The effect of glycerine-xanthate on the flotation of sulfide minerals was investigated based on a function of pH value and concentration of glyce... A small molecular organic depressor glycerine-xanthate was synthesized. The effect of glycerine-xanthate on the flotation of sulfide minerals was investigated based on a function of pH value and concentration of glycerine-xanthate through flotation experiments in the presence and absence of Cu^2+. The results show that glycerinee-xanthate has a strong dressing effect on marmatite at pH〉6 and on arsenopyrite in weak acid and base conditions with butyl-xanthate as collector. In the presence of glycerine -xanthate, marmatite is activated by addition of Cu^2+, but arsenopyrite cannot be activated and remains unfloatable. So the selective separation can be achieved for two minerals. The depression of glycerine-xanthate on sulfide minerals was discussed based on the radical electronegative calculation and the theory of HSAB. Infrared spectrum shows that there are some -OH and-CSS-in glycedne-xanthate molecule, which competes with butyl-xanthate on the mineral surface. As a result of many hydrophilic groups in glycerine-xanthate, the surfaces of marmatite and arsenopyrite become hydrophilic, thus the flotation of marmatite and arsenopyrite is depressed. The collector is adsorbed preferentially on the surface of marmatite and it shows a better floatability in the presence of Cu^2+, whereas, the surface of arsenopyrite absorbs glycerine-xanthate and the flotation of arsenopyrite is depressed by glycerine-xanthate. 展开更多
关键词 organic depressant SYNTHESIS glycerine-xanthate MARMATITE ARSENOPYRITE FLOTATION
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