某黄金冶炼厂黄金精炼工艺的优化改进

针对某黄金精炼厂原化学-溶剂萃取金精炼过程存在反应速度慢、金的浸出效果差、萃取剂价格高、生产周期长、大气污染、安全隐患等问题,提出控电除杂、合质金粉化、水溶液氯化、粗银粉电解精炼、增加真空过滤等措施对其进行优化。优化改进后,简化了工艺流程,降低了生产成本,提高了金的回收率,缩短了生产周期,预防了氮氧化物对空气的污染,消除了安全隐患,保证了产品质量。     

铜合金挤压材常见缺陷分析及预防

分析了铜合金挤压材常见缺陷(裂纹、气泡、过热、过烧、划伤、扭拧、缩尾、偏心、尺寸超差等)的产生原因,提出了相应的预防措施.生产实践表明,采取这些措施后,有效地改善了产品质量,取得了良好的经济效益.     

浅谈绿色照明在企业中的应用措施

本文介绍了绿色照明的基本内容及要求,从光源、灯具、附件的合理选择、照明灯具的控制方式等方面,分析提出了照明节能设计的应用措施,一套合理、高效、节能、环保的照明系统,不仅改善了工作环境,降低了能耗,提高了企业的经济效益,同时更好的实现了绿色节能照明。     

基于自动化技术的矿山设备现代化改造

针对河钢矿业中关铁矿建设周期长、设备供货厂家多、各类设备存在通讯障碍、检测仪表和信号缺失、先进设备无法发挥应有效能的实际情况,实施了一系列的自动化、信息化、数字化改造。建成了调度指挥中心、完善了选矿系统、压滤车间、水系统的自动控制,实现了产线设备远程操作控制,提高了工作效率,达到了“机械化换人,自动化减人”的目的。     

Access数据库在采购管理中的应用

介绍了Access数据库的特点和优点,在采购管理中应用的意义.使用Access编写了<供应仓储管理系统>,论述了该系统的设计思想、程序结构及应用效果.该系统的应用,减轻了工作人员劳动强度、提高了工作效率、确保了物资及时供应、减少了资金的占压.     

ICP-AES法测定稀土镁合金中钙镁锰钛

研究了用ICP-AES光谱仪测定稀土镁合金中钙、镁、锰、钛的方法,建立了最佳工作条件,测定了元素的检出限,测定下限,进行了干扰试验、准确度试验、回收率试验.试验证明,本方法简便、快速、准确,分析结果满意.     

自动控制系统在选矿过程中的应用

介绍了某黄金选矿厂破碎、磨矿分级、浓浸工艺流程及其存在的问题,通过对破碎、磨矿、浓浸控制系统进行自动化控制系统改造,稳定了工艺流程,提高了生产效率,降低了生产故障率,减少了工人的劳动强度,取得了显著的经济和社会效益。     

新区高炉、烧结自动化系统的设计及特点

介绍了马钢新区高炉、烧结自动化系统的设计方案,叙述了自动化系统的结构、组成、主要功能和系统的设计特点,分析、评估、探讨了自动化系统若干个设计要点,解决了自动化系统设计实施中的若干问题,为实现高性价比、稳定、可靠的系统提供了部分可参考技术。     

铁水合金化在HRB400E中的应用研究

研究开发了利用铁水直接对钢水进行合金化的炼钢新工艺,该工艺充分利用铁水中的碳、钒、钛等有益元素对钢水进行微合金化,实现了资源的节约和充分利用,减少了合金料消耗,降低了炼钢生产成本及工序能耗,提升了产品质量,形成了经济、高效、节能、环保的合金化应用技术,为钢铁企业探索出了一条极其有效的低成本炼钢合金化途径。     

天铁企业员工信息管理程序的设计

阐述了天铁企业员工信息管理程序的设计过程,通过对业务需求的分析,对管理程序进行全新开发,实现了员工信息的录入、管理、查询等功能,增强了软件实用性,提高了人力部门的工作效率,实现了人员管理规范化、系统化、科学化.     

Computer modeling of the neural network recognizing the contrasts on the image

Computer modeling of the neuron network offered in [1] is discussed. Organization and feature of modeling are described, as well as the changes, which are introduced in the network during researches. Results of modeling are present.     

The advances in the health care management in the Russian Federation on the basis of the analysis of the health personnel

Present the purpose, tasks, methods and programs of a comprehensive study of medical personnel organization and management. The activities of staff departments are proposed to be singled out as a specific service. Some findings of the study are presented, as are the results attained with the introduction into practice of a model of staff service in number of regions and the experience gained with training of specialists for personnel departments.     

Φ550 mm轧机断辊分析与轧辊改进实践

文章根据现场生产工艺环境,阐述了轧辊使用特征以及轧辊断裂的形成原因,通过与现代轧辊结构的比较和力学分析,进行轧辊结构强化改进,并取得明显的经济和社会效益.     

Influence of the blast on the gas phase in the blast-furnace hearth

Changes in the properties of the blast and the corresponding hearth gases in the blast furnace are considered—specifically, changes in the chemical composition, density, viscosity, specific heat, and thermal conductivity. The results are plotted. The conclusion is that, with increase in oxygen content in the blast, the properties of the hearth gas are improved. That offers interesting possibilities for the blast-furnace production of steel.     

Countertransference in the treatment of the borderline personality

The emotional pressure and transferences of patients to their physicians and other caregivers are natural, inevitable occurrences that are not restricted to therapeutic situations in which one is using a dynamic approach. Transferences are present in all relationships but are scrutinized in intensive dynamic psychotherapy. This article presents clinical examples that illustrate the intense pressures, often near-psychotic, exerted by certain borderline patients, which are unconsciously targeted to force a specific type of response from the therapist.     

Chronological Link Between the Abrupt Change of the Loess Grain Size Sequence and the Formation of River Terraces on the Eastern Margin of the Qinghai-Tibetan Plateau Since the Late Early-Pleistocene

Based on the study of magnetostratigraphy, magnetic susceptibility and grain size of Garz(e) A section on the southeastern margin of the Qinghai-Tibetan Plateau since the late early-Pleistocene, the basal age of Garz(e) loess is located at ～1.16 MaBP and a series of abrupt paleoclimatic changes is detected. The times of abrupt changes are of distinct series features, and the interval between each two adjacent abrupt changes is～50 kyr or ～100 kyr. The most significant abrupt changes occur at around 1.06, 0.85, 0.6, 0.46, 0.39 and 0.14 MaBP. There is a chronological link between the abrupt changes of paleoclimate and the formation of river terraces and it is almost simultaneous with a strengthening trend of neotectonic activities. Therefore, maybe the climatic transition contrail the timing of terrace formation, and the tectonic uplift originate potential energy and has a direct effect on channel incision,both the climatic transition and the tectonic uplift are important. Terraces are the products of the interaction of instable climatic variations and tectonic uplift. Like the loess-paleosol sequences, river terrace sequences are also controlled by the climate-tectonic coupling system and are ruled by climate-tectonic gyration with a ～100 kyr paracycle, which may be the short eccentricity period of the earth.     

Relations between the form of the vocal tract and the acoustic characteristics of the French vowels

The distribution inside the vocal tract of certain acoustic parameters (volume velocity, acoustic pressure, stored energy) is calculated for the French vowels. Calculations are made using a simulated lossy transmission line model of the vocal tract. The obtained results are used to study the relation between the acoustic characteristics of these vowels and the corresponding articulatory dimensions. Three aspects of this relation are developed: (1) the "affiliation degree" of each formant with different sections of the vocal tract; (2) the sensitivity of each formant frequency to small changes of the vocal tract area function, and (3) the contribution of each part of the vocal tract to formant damping for each of the distributed losses. The effects of radiation impedance and wall vibration on these relations are evaluated. Use of these results is possible in the fields of speech analysis and vocal tract modeling.     

On the nature of the martensitic transformation

A novel conceptual approach to martensitic transformation is presented. The current concepts are discussed briefly, and a more general qualitative approach to this type of phase change is proposed. It is suggested that the transformation originates in lattice vibration modes, and that once initiated it proceeds adiabatically with no discernible division into nucleation and growth. The transformation does not occur through a dislocation mechanism, and the high dislocation densities observed as associated with martensite formation consist of immobile dislocations. These form to accommodate the transformation strains which are highly localized, but are also self-accommodating and on completion of the transformation are macroscopically nondirectional. All of the anomalies in the mechanical properties reported in the past are ascribed to the effects of an applied stress on the transformation. It is suggested that investigations of such effects on transformation, particularly in single crystal material, should be most fruitful in providing new fundamental insight into the mechanism of the transformation.     

铝电解多功能机组新标准修订中关键问题研究

介绍了铝电解多功能机组的发展现状、现行标准的状况及标准修订的紧迫性及修订依据。在此基础上,对标准中铝电解多功能机组的结构型式、工作环境条件、生产安全等关键问题的修订进行了讨论:增加了铝电解多功能机组的结构型式,对铝电解车间磁场强度进行了分析和实测,对车间环境温度分布进行了计算流体动力学分析,约定了铝电解多功能机组的工作环境参数,同时结合桥式起重机、冶金起重机及绝缘起重机等现行标准,增加了铝电解多功能机组声光报警、控制联锁、标记指示及包装运输的安全要求。     

高线产品钢种转换的料型调整研究

通过研究轧钢厂高速线材车间轧制Φ20不同钢种ML08AL与65Mn,因钢种转换时其宽展变化引起料型变化,总结调整方法,并得出低碳钢向高碳钢钢种转换时料型调整应注意的关键点。