关于含氰贫液综合治理技术的应用分析

针对含氰贫液综合治理技术的应用,文章从实践角度出发,分析了含氰贫液综合治理技术的具体应用,并提出了具有针对性的控制措施,其目的是为相关建设者提供一些理论依据。结果表明,综合利用各处理系统,包括净化回收系统和酸法再生回收系统等进行处理,能够达到排放标准。     

高铜贫液两步沉淀除杂全循环工业试验的研究

为实现含氰污水“拎排放”,达到保护环境、充分利用资源、可持续发展的目标,针对蓬莱市黄金冶炼厂氰化贫液中含铜质量浓度高的特殊刊物了系统的试验研究。在小型试验的基础上,设计并实施了两步沉淀除杂金循环的工业试验,回收了大部分贵金属和有价的贵金属,最大限度地回收利用了贫液中的氰化钠。在不降低金的氰化浸出率的情况下,使含氰污水全循环,实现了“零排放”,降低了生产运行成本,有效地保护了水环境。     

树脂交换法处理氰化贫液的试验研究

采用717# 和704# 树脂交换法处理含氰污水,回收其中的氰化物和重金属,并使污水循环使用。通过一系列条件试验,论证了树脂交换法处理贫液是可行的。     

含氰贫液酸化产物中铜元素回收工艺研究

金精矿焙烧-氰化系统含氰贫液闭路循环需要定期开路部分贫液,贫液中的Cu元素具有一定的回收价值,本文在含氰贫液酸化法处理工艺基础上探索含氰贫液中Cu元素回收工艺的可行性。酸化处理后CN-挥发率为95.42%,铜沉淀率为97.82%。酸化后贫液固液分离所得酸化沉淀含铜22.77%～35.01%,采用焙烧-酸浸-萃取工艺回收铜,最佳实验条件如下：焙烧温度为640 ℃,液固比为5∶1,H2SO4质量浓度为5%,酸浸时间为3 h,此时可获得铜浸出率为92.27%～95.00%。以20%Lix984作为萃取剂,调节浸出液pH=2.3,有机相和水相相比为1∶1,萃取时间为3～5 min时,单级铜萃取率为98.96%;酸化后贫液固液分离所得液体平均铜浓度为72.89 mg/L,以硫化法深度沉淀铜,当Na2S用量为0.4～0.6 g/L,沉淀时间为1 h时,铜沉淀率为92.21%～99.09%。     

酸化法回收氰化物现状与前景

自一九八一年用酸化回收法处理含氰废水的工艺装置投入运行到现在,已有四年多时间了,在此期间,人们对酸化回收法在黄金矿山的应用,各抒己见,褒贬不一.下面根据酸化回收法处理含氰废水的实际情况,谈一谈我们的看法.采用浮选—氰化工艺提金的矿山、其贫液组成大致如下(单位mg/1),见表1.     

甘肃某金矿含氰贫液处理及再利用试验

针对甘肃某金矿含氰贫液特点,分别采用因科法和碱氯法处理,并对试验条件进行了优化。试验结果表明:因科法去除氰化物效果较好,在含氰贫液p H值11、焦亚硫酸钠用量1 800 mg/L、不充气搅拌1.5 h条件下,处理后贫液中总氰化合物质量浓度由79.59 mg/L降至0.47 mg/L,低于国家废水排放标准规定的0.5 mg/L,处理后尾渣毒性浸出指标均达到国家尾矿库处置污染控制要求。含氰贫液循环利用于浸出流程不影响金的浸出。     

某黄金冶炼公司含氰贫液综合治理技术研究

针对某黄金冶炼公司的含氰贫液特点,以达标排放为主要目的,采用长春黄金研究院自主研发的3R-O净化回收系统、Colt’s酸法再生回收系统、除砷系统以及深度治理系统进行了综合治理技术研究。研究结果表明:3R-O净化回收系统可回收贫液中98%以上的氰化物;Colt’s酸法再生回收系统可去除95%的硫氰酸盐,再生回收75%的氰化物;除砷系统中砷的去除率可达99%;深度处理系统可使处理后的尾液中各污染物质量浓度稳定达到GB 8978—1996《污水综合排放标准》中的一级标准。     

沉淀法净化电积提金贫液的新工艺

采用沉淀法新工艺，可充分地脱除氰化电积贫液中铜，铁，锌等杂质离子，还有效地回收金和部分游离氰根，经处理后的贫液可返回使用，实现闭路循环。本文对沉淀过程及电积贫液净化前后过提金过程影响的机理进行了系统分析。最后指出，该工艺可望用于净化其提金过程产生的氰化贫液。     

全泥氰化炭浆提金工艺含氰尾矿处理技术改造与实践

介绍了一种全泥氰化炭浆提金工艺含氰尾矿处理技术新工艺方法。该方法基于采用压滤机将含氰尾矿浆压滤进行固液分离，滤饼送至尾矿库堆放，滤液用锌粉置换回收金、银；置换后的尾液采用酸化中和法处理。回收重金属离子，含氰废水返回流程利用。生产实践表明。该工艺不但综合回收尾液中的金、银、铜等有价元素，实现了含氰废水闭路循环。而且节约了处理成本。解决了尾渣的堆放难题和环境污染，具有极大的经济效益和社会效益。     

某铜金氧化矿高氰高碱综合回收金铜试验

针对某含铜氧化金矿开展高氰高碱综合回收金铜试验。结果表明,在矿石细度-0.074mm占93.54%、氰化钠浓度1000mg/L、矿浆浓度40.00%、浸出时间48h、炭用量10g/L的条件下,金浸出率为89.67%,炭金品位313.20g/t,铜品位1304.48g/t。炭浸贫液通过酸化法脱铜回收氰根,氰根回收率超过99%,同时铜以品位超过60%铜精矿回收。     

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.     

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)     

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.