盐酸溶液中六次甲基四胺对黄铜的缓蚀作用及吸附热力学研究

采用失重法研究了不同温度下不同浓度的六次甲基四胺在10%盐酸介质中对黄铜的缓蚀作用.结果表明,六次甲基四胺在10%盐酸介质中对黄铜的腐蚀有良好的抑制作用,六次甲基四胺吸附于黄铜表面,其吸附规律服从Langmuir等温式,由此获得了相关热力学参数.     

改变传统的柔性风筒连续和悬挂技术的探讨

探讨了改变传统的柔性风筒连接和悬挂技术。给煤矿企业柔性风筒的改进和优质安设找出了一个途径。     

标准型圆锥破碎机动锥圆锥头可靠性分析

通过对标准型圆锥破碎机圆锥头的松动、摆动、振动等失效的外在表现形式及产生失效的原因进行分析计算,在对其结构做适当改进的基础上,寻求出间接提高圆锥头可靠性能的办法,如增加预紧力等,从而解决实际问题,达到可靠效果。     

基于AMESim和Simulink的液压伺服系统动态仿真

提出了基于AMESim和Simulink的液压伺服系统进行动态仿真的方法。以阀控液压缸为例,建立液压系统的动态数学模型,给出了仿真模型,详细介绍了如何利用AMESim和Simulink对液压系统动态特性进行仿真,同时分析了影响液压系统动态特性的主要因数。     

Heavy metals distribution in fly ash from gangue power plant

To make assessment on its environmental security, fly ash samples were collected from the gangue power plant. Total content of heavy metals in sieved fly ash were analytically determined. We also carried out Tessier extractive experiments to check the chemical species of heavy metals. Experiment results show that the content of Cu, Zn, Pb and Cd ascend when particle size is smaller. Cu, Zn, Pb and Cd obviously enrich in particulate fly ash. The chemical species of heavy metal distribution ranking sequence generally is residual〉organic combinative〉Fe-Mn oxide combinative〉carbonate combinative〉ion-exchangeable. Lead＇s amiable-move species were high in proportion, amounted to 35%. Total content of Cadmium is at low level, but its ion-exchangeable species is relatively high in proportion. Nickel and zinc is mainly distributed in residue. Cu is mainly distributed in residue and organic combinative form. The content of manganese is relatively high in fly ash, and the carbonate combinative iron-manganese oxide combinative species are main chemical form. Cr is mainly distributed in residue, and its other chemical species are at low level. Compared with the soil background value of study area and Shandong Province, the content of Cu, Ni, Zn, Mn and Cr in fly ash of gangue power plant is lower. While contents of Pb and Cd were higher than background value, and amiable-move species is relatively high in proportion. They are more apt to cause heavy metal pollution.     

异形矿物的超细效应研究

本文主要讨论了异形矿物的机械法超细效应，超细粉体性能表征指标以及矿物材料机械加工方式的适用性，对比分析了矿物粉体的主要表面变化特征，肯定了矿物颗粒的微观内外界面，官能团与缺陷的生成，是影响粉体系列特征的主要因素。     

球磨机状态监测系统设计与故障诊断

针对球磨机传动系统设计了球磨机振动监测系统，采用信号的时域、频域分析相结合的方法对球磨机进行了振动监测和故障诊断，测试分析结果较好地反映了球磨机的真实工况和故障，为选矿厂对球磨机的检修和维护提供了技术支持。     

炮采放顶煤开采工艺研究与实践

1工作面地质条件2505工作面位于九矿二水平五采区南部,西部和25031工作面(未开采)相邻,南到F7断层防水煤柱边界,东与2507工作面(未开采)相接,北为-400皮带下山保护煤柱。工作面平均走向长度750m,平均倾斜长度120m,地质储量89.2万t。2505工作面直接顶为砂质泥岩,厚约5.4m,老顶为     

大力推广气动潜孔锤及气举反循环组合钻进技术

针对我国目前水井和煤层气钻井技术特点,就如何大力推广应用气动潜孔锤与气举反循环组合钻进技术进行了探讨,结合生产实际阐述了推广此种组合钻进技术的优越性。