高产高效综放工作面设备改造研究

论述了成庄矿综放工作面设备改造,包括伸缩机尾改造、顺槽设备的更新与改造和顺槽皮带机的更新。     

灰色关联度分析在矿井水防治中的应用

本文应用灰色关联度分析方法,定量地评价矿井充水水源,并讨论了灰色关联度分析的基本原理,分析了子序列与参考序列的关系;并通过工程实例介绍了均值处理及关联系数的计算方法。     

露天矿外部排土场的模拟优化研究

以唐钢石人沟铁矿为背景，进行露天矿岩石排弃的模拟优化研究。采用动态模拟、线性规划、模糊数学等理论和方法，建立了外部排土场模拟模型、目标决策模型、流向流量优化模型。设计了相应的框图，编制了计算机软件，并结合矿山实际进行了模拟优化研究。     

Charakterisierung eines schweren Kohleverflüssigungsproduktes durch kombinierte Hochleistungsflüssigkeitschromatographie/Massenspektrometrie

Zusammenfassung Ein Recycleöl wurde semipräparativ auf einer Tetrachlorphthalimidopropylsilan-modifizierten Säule hochleistungsflüssigkeitschromatographisch in 23 Fraktionen getrennt. Zur Identifizierung der Hauptkomponenten wurden die Fraktionen mit einer einfachen Präparationstechnik in das Massenspektrometer eingebracht und die Molekülionenspektren unter Benutzung der Low Voltage-Technik gemessen. Vorteilhaft für die Charakterisierung hochsiedender technischer Gemische ist die Tatsache, daß die chromatographische Trennung streng nach der Anzahl der aromatischen Ringe im Molekül erfolgt, weitgehend unabhängig von der Alkylsubstitution.

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Characterization of a heavy coal liquefaction product by combined high-performance liquid chromatography/mass spectrometry

Summary A recycle-oil was separated on a semi-preparative scale into 23 fractions by means of HPLC with a tetrachlorophthalimidopropylsilane-modified column. Mass spectrometry enabled a more or less complete identification of the main components. For this, the fractions were introduced into the mass spectrometer by a simple preparation technique, followed by measurement of the molecule ion spectra by the low voltage technique. An advantage of HPLC for the characterization of high-boiling oil mixtures is that separation takes place almost exclusively accoding to the number of aromatic rings in the molecule and is largely independent of the degree of alkylation.

     

浅谈神东煤炭分公司安全生产管理与持续发展

通过对安全生产的分析,结合神东煤炭分公司安全生产管理模式,论证了安全生产管理与持续发展的关系。     

Use of elemental size distributions in identifying particle formation modes

The chemical composition of particles generated during pulverized coal combustion is the consequence of their formation processes. This work aims to use the size resolved elemental composition of coal-derived particles to identify their formation modes. A size-classified bituminous coal is burnt in a laboratory drop tube furnace at 1150, 1250, and 1350 °C, respectively. The elemental composition of the size-segregated particles from coal combustion is analyzed and the total mass fraction size distributions of Si and Al are obtained. Three particle formation modes are observed in these distribution profiles. The coarse mode has the highest value of the total mass fraction of Si and Al while the ultrafine mode has the lowest one. The total mass fraction of Si and Al in these two modes is nearly independent of particle size. It is believed that the coarse mode is formed by the mineral coalescence mechanism and the ultrafine mode by the vaporization–condensation mechanism. The difference in the total mass fraction of Si and Al between the central mode and the other two indicates that the central mode is formed by different mechanisms. Based on the observation that the total mass fraction of Si and Al in this mode increases with increasing particle size, heterogeneous condensation of vaporized species on existing fine residual ash particles is proposed to account for the formation of these particles. The study of the elemental composition of the three modes represented in five categories verifies the proposed formation mechanisms for them to some extent.     

煤化工企业含苯有机尾气的回收

化工生产过程中产生含有有机物的尾气,排放到空气中不仅造成环境污染,还是资源的一种浪费。本文根据粗苯加氢物料、工艺、装置及公辅供应等特点,选用冷凝法对真空尾气进行回收利用,不仅减少了污染物的排放,还取得了一定的经济效益。     

努力提高企业质量标准化管理水平

从多方面介绍了马兰矿在企业安全质量标准化管理方面的成果，并指出为使矿井质量标准化管理工作发挥长效作用应注重的几点工作。     

通过强化管理和依法治企全力创建和谐企业

以平朔生活服务公司为例,详细介绍了坚持依法治企、加强法律宣传教育、不断提高全体职工法律意识的重要性及具体做法。     

A structural model for the time-dependent recovery of mineral suspensions

A thixotropic recovery model has been developed that is based on consideration of the microstructural interactions that occur between particles within a suspension particle network. The model is based on Smoluchowski coagulation rate theory, utilizing second order kinetics to describe the thixotropic recovery behavior. The model is applied to Na-montmorillonite-based coal tailings suspensions and is also shown to be applicable to brown coal and bauxite residue suspensions. The model describes all the recovery data well, especially at intermediate to large recovery times. The recovery of the montmorillonite suspensions at short times was faster than predicted, indicating the existence of additional factors in early-time structure development. The discrepancy may have also been due to the highly anisotropic nature of the clay platelets. The recovery rate constant, K _r , increases with increasing solids concentration (for constant surface chemical conditions) as would be expected from the basis of the model. Received: 22 September 2000 Accepted: 16 March 2001