酸性重金属废水的联合处理试验研究

采用硫化沉淀法将酸性重金属废水中的铜进行沉淀回收,处理后废水用氧化钙中和后产生的中和渣和中和液进入选矿系统。试验结果表明:采用硫化沉淀法可以回收高品位的铜,回收率较高;与自来水进行选矿试验相比,中和处理产生的中和渣和中和液进入选矿流程同样可获得良好的选矿指标,二者基本相同。该工艺可利用现有的选矿设备实现酸性重金属废水的资源化治理。     

瑶岗仙裕新多金属白钨矿选矿厂设计实践

从原矿工艺矿物学研究、选矿试验、工艺流程设计、选矿回水利用及尾矿处理等方面,介绍了湖南瑶岗仙裕新多金属矿建设的各个环节.论述了采、选矿废水回用、尾矿处理设计方案的可行性与合理性,实现了采、选矿厂废水的零排放.     

铜铅锌选矿废水处理及回用技术研究

研究了铜铅锌选矿废水的处理方法,并对处理后的废水进行了选矿回用试验,为铜铅锌矿最终实现选矿废水零排放提供参考。研究结果表明:选矿废水经"碱式铝絮凝沉淀过滤-二氧化氯氧化-调节"处理后,可回用于选矿系统,对选矿指标基本无影响。     

井下含硫铁矿床预防自燃与自燃后治理

研究主要针对湖南宝山有色金属矿业有限责任公司井下采场,此矿山现今主要进行地下开采,矿山主要有铅锌矿、铜钼矿。在井下铅锌矿采场中,部分采场内岩石含有大量硫铁矿,特别是矿山北部区域,含硫铁矿较高采场在矿体回采后存放太久的情况下容易发生自燃,严重影响到井下安全生产,所以对含硫铁矿采场自燃的预防与自燃后的治理及其重要。该矿山针对井下含较高硫铁矿床预防采场自燃与自燃后治理进行了研究,做到降低采场自燃可能性,自燃后提高治理效率,尽量减少此类采场对安全与生产的影响。     

选铜矿山选矿废水COD降解试验

针对选铜矿山工业废水COD含量高的特点,试验在选矿废水中添加化学试剂,达到去除COD的目的,最终使废水能够达标排放。试验结果表明在酸性条件下,废水中添加次氯酸钠溶液,可以有效去除COD,该方法操作简单,费用低。     

某钨矿选矿废水处理及回用试验研究

某钨矿选矿过程中加入了大量硅酸钠和其他浮选药剂,造成了尾矿沉降缓慢,选矿废水黏度大,废水中TAs、COD_(Cr)等指标超标无法外排等问题,而且将此尾矿澄清水回用到选矿中,浮选指标严重恶化。针对此问题,本文对该钨矿选矿废水进行了脱稳除硅试验和除砷降COD_(Cr)试验,试验结果表明,"石灰沉淀-铁碳微电解-吸附材料吸附"工艺处理该钨矿选矿废水效果明显,处理后的废水后液中TAs与COD_(Cr)指标均可达到国家地表水Ⅱ类水质标准,将其返回选矿流程,选矿指标接近清水指标。     

江铜废水循环利用

江西铜业集团公司德兴铜矿为破解采矿选矿需要大量取水和铜矿被选出后产生的酸性废水又难以处理的难题，将矿山工业废水一分为三：1／3的废水用于废石场喷淋浸出铜，1／3的废水排入尾矿库与库中碱性水中和后返回选矿，1／3的废水进入处理站处理达标后排放。目前，整个江铜集团工业用水复水率达85％，每年节约水资源3亿t，节约取水资金2000万元。     

大型矿业节水治污技术项目

该技术项目以大型有色矿山德兴铜矿为示范企业，系统研究了大型矿业节水优化管理技术、复杂矿山酸性废水处理技术和废水回用技术，并结合德兴铜矿产生酸性废水的实际，建立起与节水减污优化集成技术相配套的8项工程。包括露天开采区截排水系统调控与管理工程；北山290酸性水输送工程；杨桃坞酸性水综合利用工程；水龙山废石场清污分流工程；杨桃坞、祝家酸性水库清污分流工程；采场南山110平台清污分流工程；     

对选矿废水综合利用的探讨

通过对金堆城钼业公司选矿废水再用于选矿作业的选矿试验，证明选矿废水循环利用是可行的，既提高了选矿浓度，又减少了对环境的污染，经济和社会效益显著。     

大型铜矿山二次资源的开发利用

本文叙述了大型铜矿山在生产中产生的废石、低品位矿石、酸性废水及地表难选氧化矿石、表外矿石中回收铜，在选矿排出的尾矿中，再次回收有用金属的试验研究与生产实践的效果。     

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。     

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。     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.     

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.     

参与式农业基地建设行动方案设计

为了编制实用性强的基地建设行动方案,首先,确定参与式发展的主体,搭建一个"决策框架";其次,针对行动目标,提出不同参与主体,如管理者、农民、消费者等团队与个人的目标及行动内容;最后,工作应向重塑伙伴式合作关系,挖掘农民自我发展潜力,完成三大角色的转换,打造农业基地文化等方向推进.