甘肃陇南山区低品位氧化金矿的开发利用

甘肃陇南山区分布着较为广泛的低品位氧化金矿，其特点是带状分布、规模大、品位低。可采用就地产金方案(池浸、堆浸氰化提金工艺)，投资少、见效快，当年投资当年还本，投资利润率高，具备开发利用的可行条件。     

甘肃陇南山区低品位氧化金矿的开发利用

甘肃陇南山区分布着较为广泛的低品位氧化金矿 ,其特点是带状分布、规模大、品位低。可采用就地产金方案 (池浸、堆浸氰化提金工艺 ) ,投资少、见效快 ,当年投资当年还本 ,投资利润率高 ,具备开发利用的可行条件。     

甘肃陇南山区低品位氧化金矿的开发利用

甘肃陇南山区分布着较为广泛的低品位氧化金矿,其特点是带状分布、规模大、品位低。可采用就地产金方案(池浸、堆浸氰化提金工艺),投资少、见效快,当年投资当年还本,投资利润率高,具备开发利用的可行条件。     

量本利分析法与提高矿山经济效益

推导了矿山量本利分析公式。结合我国第二大铜矿——中条山有色金属公司铜矿峪矿的实例进行分析得出结论：原矿品位对矿山利润的影响是至关重要的，品位越低影响越大。对低品位矿山，加强损失贫化管理，提高原矿品位有特殊意义。利用量本利分析公式可以进行矿山当年、当月和当日利润预测，通过预测，矿山生产经营中的许多问题及时得到反馈，得到解决，确保利润计划的实现。     

利用产销时间差分阶段集中处理低品位矿石方案在宜春钽铌矿的应用

在充分掌握矿产资源分布特点、选矿流程和副产品产销能力的基础上，抓住低品位矿石集中分布和副产品产销能力差之大为关键点，充分论证了利用产销时间差分阶段集中处理低品位矿石方案实施的必要性和可行性，从而为矿山可持续发展开辟了一条新途径。     

某低品位锰矿的投资优化分析研究

我国锰资源具有分布广泛但储量不足、品位低、品质差、对外依存度过高等特点。近年来我国锰矿产业发展迅速,我国已经成为全球第一大锰矿资源消费国,而随着新能源市场的增长,未来我国锰矿资源的供需矛盾将进一步加大。基于当前锰矿仍为我国短缺矿产、需求量大等实际情况,如何快速、低成本、高效地开发我国境内锰矿山来增加矿石产量,开展这方面的研究十分有意义。对湘西某低品位锰矿山的设计优化来减少投资,矿山成功投产,为后续的低品位锰矿山的开发建设、投资控制、项目实施等方面提供了很好的参考。     

马来西亚建设低品位锡矿处理厂

马来西亚建设低品位锡矿处理厂马来西亚冶金公司（ＭａｌａｘｓｉａＳｍｐｌｔｉｎｇＣｏｒｐ）现正计划在今后两年内在马来西亚的巴特沃思（Ｂｕｔｔｅｒｗｏｒｔｈ）建设一家处理低品位和中等品位锡矿的工厂，新厂址距该公司现有冶炼厂约１０ｋｍ。新厂投资达２０００万...     

中国低品位铜矿的浸出——萃取——电积工艺经济评述

采用浸出－萃取－电积工艺处理难选低品位氧化铜矿，可产出高质量的１＃阴极铜。该工艺具有低投资、低成本、高效益、无污染等优点，自１９９２年就被国家科委列入国家级重大科技成果推广计划。本文对该工艺在中国的应用情况及投资和效益作了简单的阐述。     

铀矿石预先抛尾—两段放射性分选试验研究

研究了某铀矿石粒度及铀品位分布规律;根据其放射性显明度,绘制了放射性可选性曲线。结果表明,铀在矿石中的分布极不均匀,0～2.5 mm粒级矿石中铀品位最高,为0.475%。推荐采用预先抛尾—两段放射性分选工艺。通过该工艺可获得低、中、高3种品位铀矿石。理论选矿指标分别为:低品位矿石产率52.06%,铀品位0.006 3%;中品位矿石产率9.39%,铀品位0.066 7%;高品位矿石产率3.93%,铀品位3.370 5%。     

降低金矿石回采边界品位分析与应用

当前国际黄金价格一直维持一个较高价位,而黄金生产技术和生产成本基本稳定,黄金生产投资收益率大大提高,这就使低品位矿石的回收成为可能。就金亭岭矿业有限公司生产现状,对低品位矿石的可回收品位进行了探讨。     

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。     

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)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

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.     

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.