大型低品位有色多金属矿山高效开发对策

以乌努格吐山铜钼矿开发为工程背景,对大型低品位铜钼多金属矿山的高效率和高效益开发对策进行了探讨。实践表明,坚持科学开发、环保节能和资源综合利用是大型低品位多金属矿山高效开发的有效手段,乌努格吐山铜钼矿开发的成功经验将对中国大型有色金属矿山开发具有借鉴意义。     

基于3DMine软件的多金属矿山不同露天开采境界优化方法的对比

境界优化是露天矿山开采设计的主要内容之一。对于多金属矿山露天开采境界圈定时,会有不同的境界圈定方法。以某锡锌多金属矿为工程背景,利用3DMine软件分别以不同的方法进行境界圈定,并综合考虑矿山资源状况、开采技术条件、矿产品销售价格、矿石开采及处理成本等多种因素,得出实现经济效益最大化的境界。结果显示,对于矿石品位已知的矿山,利用以品位计算价值比以矿石类型计算价值更合理;对于多金属主元素含量与伴生有益组含量差距比较大时,利用当量品位计算价值比以多金属品位单独赋值计算价值更合理。     

金属矿山能源管理及节能途径探究

为深入探讨金属矿山能源管理及节能途径,平衡资源开发与环境保护,实现可持续发展,文章从完善矿山开采技术、优化开采体系和提升能源管理水平等角度,分析了金属矿山节能途径,阐述了金属矿山开采技术的关键共性技术和工程装备,从而为实现节能目标提供有力支持。同时,文章也着重从全面优化金属矿山节能机制、强化政策管控以及落实节能管理等角度,提出了金属矿山能源管理及开采体系优化的有效路径,为金属矿山可持续发展提供具体策略和实践方向。     

黄金矿山入选品位与黄金成本关系分析

为了研究矿山入选品位与黄金成本之间的动态关系,以焦家金矿为对象,建立了矿山入选品位与黄金成本之间的关系模型,系统分析了入选品位对黄金成本的影响。并对矿山入选品位降低后,保证黄金产量和一定利润的途径进行了探讨。     

基于蒙特卡洛模拟的有色多金属矿山边界品位动态优化管理

为了充分利用矿产资源,提高多金属共伴生矿企业的经济和社会效益,提出了运用蒙特卡洛模拟数学方法,结合计算机技术进行边界品位测算的新方法,并简述了实现过程。通过系统地研究矿山生产投入参数,建立相关数学模型,最后利用SQL Server 2008数据库软件和.NET 4.0软件开发平台,研发了一套多金属矿边界品位动态优化管理系统。通过在某多金属矿的应用,该系统实现了矿山技术经济指标和生产成本的动态管理,并得出了最优边界品位。     

XRT智能预选技术在有色金属矿山中的应用进展

随着矿产资源贫、杂、细等特点日益突出,入选矿石品位低和堆存废石量过大等问题凸显。将智能分选技术应用于矿石入选前的预先富集工序是解决该问题的一个重要途径。其中,以X射线透射技术（XRT）为主导的分选成像方案已经成为有色金属矿山解决有关问题的主流方式之一,并且在钨、铅锌、钼等金属矿山的选矿过程中取得了较好的富集效果,大大提高了矿山的经济效益。本文旨在介绍XRT的发展历程及研究现状,包括分选设备的原理、特点,以及该技术在不同有色金属领域的应用情况。     

矿山测量在金属矿山安全生产中的应用研究

金属矿山生产中,矿山测量是其中非常重要的环节,本文从矿山测量在金属矿山安全生产中的重要作用入手,探讨金属矿山安全生产中矿山测量技术的实际应用。     

金属矿山供电系统安全性分析及事故预防对策探究

从矿山安全电源技术的角度,介绍矿山电源的基本要求,然后分析矿山安全电源技术,从而确保矿山电源系统稳定可靠,金属矿山供电系统管理对确保金属矿山企业的安全生产具有重要意义。因此,在金属矿山供电系统工作中,需要分析金属矿山供电系统的安全性,并且列举出可能发生的危险状况以制定应对措施。     

金属矿山通风系统安全问题探究

对于金属矿山而言,其通风系统关系到矿山整体的安全问题,是矿山作业流程中的重要环节,通风系统的质量为金属矿山的安全和工作进展提供了保障。本文通过对通风系统的概念、其存在的主要问题对金属矿山的通风系统的安全进行分析,并对如何有效的确保金属矿山通风系统的安全提出了一些建议。     

金属矿山通风系统安全问题探究

对于金属矿山而言,其通风系统关系到矿山整体的安全问题,是矿山作业流程中的重要环节,通风系统的质量为金属矿山的安全和工作进展提供了保障。本文通过对通风系统的概念、其存在的主要问题对金属矿山的通风系统的安全进行分析,并对如何有效的确保金属矿山通风系统的安全提出了一些建议。     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)