露天矿山深-浅耦合台阶爆破方法研究及应用

爆破大块率高一直是困扰国内外众多露天矿山的技术难题,银山矿露天采矿场由于采区地质条件复杂,爆破大块率高的现象尤为明显。为此,针对露天采矿场岩性复杂易产生大块的区域,基于岩石的物理力学性质,计算出千枚岩和斑岩爆破区域需增设的短孔孔位。为减少爆破大块的产生率,提出了中深孔爆破方法—深-浅耦合台阶爆破方法。在银山矿露天采矿场实施深-浅耦合台阶爆破方法后,爆破大块率得到有效控制并取得了显著的社会及经济效益。     

多元高铬铸铁在反击式破碎机板锤上的应用

在高铬铸铁中加入多种少量和微量合金元素用以生产反击式破碎机板锤，可使产品耐磨性和综合力学性能得到很大程度的改善。使用寿命比原用高锰钢提高4倍以上。     

数据融合在电梯群控系统中的应用

将数据融合技术引入电梯群控系统中,建立了基于数据融合技术的模糊联结聚合神经网络模型,对影响电梯调度的各因素进行充分有效的数据处理后,得到的电梯控制参数作为电梯调度单元的输入.应用实例表明了该方法是方便且有效的.     

Accu—Roll轧管机组主减速机输出轴联轴器大过盈量装配

介绍了采用油温加热装配工艺,实现Accu-Roll轧管机组主减速机输出轴联轴器大过盈量装配。     

中小批量铸铁车间就地技术改造

采用相互兼顾的原则，进行中小批量的铸铁车间就地技术改造，较好地解决了工人劳动强度、作业环境、铸件质量、产量与技改投入的矛盾。     

粉煤灰填充尼龙6浇铸制品的研究

将粉煤灰用硅烷偶联剂处理后填充到尼龙6浇铸制品(MC尼龙)中,可以改善制品的吸水性、收缩率及热稳定性等,还可以降低成本。该项研究结果有很大的实用价值。     

氧泵型催化膜反应器中甲烷氧化偶联反应(Ⅰ)——氧泵型催化膜的制备及其反应性能

本文采用1％Sr/La_2O_3-Ag-YSZ氧泵型催化膜反应器进行了甲烷氧化偶联反应研究。比较了不同制备方法的催化膜的反应性能,结果发现浸涂法(Ag-YSZ管随旋转轴转动涂制)制备的膜性能最佳。研究了操作条件对甲烷氧化偶联反应的影响。研究证明,传递氧与气相氧同时进料是一种较好的反应方式。结果表明,利用该反应器不仅可以简化分离过程,而且还可得到更高的C_2烃选择性。     

Non-isothermal reaction-diffusion systems with thermodynamically coupled heat and mass transfer

Non-isothermal reaction-diffusion (RD) systems control the behavior of many transport and rate processes in physical, chemical, and biological systems. A considerable work has been published on mathematically coupled nonlinear differential equations of RD systems by neglecting the possible thermodynamic couplings among heat and mass fluxes, and reaction velocities. Here, the thermodynamic coupling refers that a flux occurs without its primary thermodynamic driving force, which may be gradient of temperature, or chemical potential, or reaction affinity. This study presents the modeling equations of non-isothermal RD systems with coupled heat and mass fluxes excluding the coupling of chemical reactions using the linear non-equilibrium thermodynamic approach. For a slab catalyst pellet, it shows the dynamic behavior of composition and temperature profiles obtained from the numerical solutions of non-linear partial differential equations by Mathematica for two industrial reaction systems of synthesis of vinyl chloride and dissociation of N₂O.     

Oxidative coupling of methane over CaO-MgO mixed oxide

Mixed oxide catalyst prepared by co-precipitating magnesium oxide and calcium oxide showed an excellent activity for the oxidative coupling of methane. The high performances were presumed to arise from the high basicity of the mixed oxide.     

On the preparation and properties of CuZSM-5 catalysts for NO decomposition

Equilibrium exchange isotherms were determined for the exchange of Cu²⁺ with NaZSM-5 at varying Cu(Ac)₂ concentrations in solutions of constant volume and zeolite weight. At low Cu²⁺ levels the solid scavenged all the copper ions. When copper could be detected in the equilibrated solutions, overexchange was observed. The extent of overexchange was higher at pH 6 than at pH 4. These results were analyzed in relation to catalytic activity.On leave from the Central Institute for Chemistry, Hungarian Academy of Sciences, H1525 Budapest, Hungary.