浮选铜精矿加压酸浸工艺研究

系统研究了各种因素对浮选铜精矿铜浸出率的影响。结果表明:在中温条件下铜浸出率不高的根本原因是由于形成大量的硫包裹,于是采用了新型浸出剂ZK-05,使精矿中铜的浸出率达到98%以上,而硫则通过浮选回收,其回收率约为60%。     

镍精矿加压酸浸新工艺研究

研究了金川镍精矿加压一步全浸镍、钴、铜新工艺,浸出液中和除铜后萃取分离镍钴,镍、钴、铜的浸出率可分别达到99.5%、98%和98%以上。该工艺与硫酸选择性浸出相比具有金属浸出率高、分离彻底、易分别回收等优点。     

多金属硫化矿浮选精矿加压酸浸研究

研究了多金属硫化矿浮选精矿加压酸浸过程及各种因素对浸出的影响。研究结果表明:在不苛刻的条件下经加压酸浸,多金属硫化精矿中锌浸出率可达99%以上,铜浸出率可达90%以上,而铅、银则98%以上进入浸出渣,元素硫产出率约70%。     

微波活化铜精矿加压浸出动力学

铜精矿经微波活化后,在初始硫酸浓度1.23 mol/L,液固比（mL/g）30/1,氧分压0.6 MPa,搅拌转速度500 r/min条件下,在408～453 K范围内研究了加压浸出动力学,并与微波活化前浸出动力学进行比较.结果表明,微波活化前后,铜精矿铜、锌浸出行为规律基本一致.在408～438 K范围内,铜精矿微波活化前后,铜浸出速率未见明显变化,而当温度升高至453 K后,铜浸出速率较微波活化前略有增大.当温度低于423 K时,锌浸出速率较微波活化前略有增大;当温度高于438 K时,锌浸出过程反而略有放缓.微波活化铜精矿铜、锌浸出反应的表观活化能分别为56.33、49.77 kJ/mol,铜、锌浸出过程均遵循界面化学反应控制的收缩核模型.与活化前相比,铜精矿经微波活化后铜、锌浸出过程得以促进.     

从硫化铟精矿中加压酸浸回收铟锌的技术研究

对硫化铟精矿进行加压酸性浸出铟、锌的试验研究,考察了时间、压力、酸度对锌、铟浸出率的影响,对综合条件试验后的终渣的形貌进行扫描电镜（SEM）检测分析。试验得出,经过加压酸浸后锌的浸出率达到98％以上,铟的浸出率达到89％以上。     

高砷铜冶炼烟尘酸浸—硫化试验研究

高砷冶炼烟尘是火法炼铜过程中底吹熔炼炉产生的副产品,该烟尘中含铜、砷、锌、铅、金和银等有价元素,是潜在的冶金副产资源,酸性浸出砷和铜具有环境友好、适用范围广、能耗低和回收率高等优点,具有较好的工业化应用前景。针对国内某铜冶炼厂高砷铜冶炼烟尘,采用硫酸浸出—分步硫化沉铜、砷工艺进行试验研究。结果表明：在硫酸酸度50 g/L、液固比2.5∶1、搅拌速度350 r/min、反应温度40℃条件下反应120 min,砷、铜、锌的浸出率分别为76.78%、98.07%、97.45%;对浸出液进行铜、砷分步硫化,铜、砷沉淀率高达98%以上。该工艺为后期侧吹炉熔炼工艺中有价金属和贵金属的回收创造了有利条件,实现了铜冶炼烟尘中有价元素的综合回收与利用。     

某含铜金精矿焙砂硫脲浸出试验研究

某含铜金精矿焙砂中铜含量高,直接进行酸性硫脲浸出,铜会对硫脲浸出产生不利影响。针对该含铜金精矿焙砂性质特点,进行了酸浸脱铜、硫脲浸出试验研究。结果表明:经过酸浸脱铜预处理后,采用硫脲浸出工艺处理该含铜金精矿焙砂,金浸出速率较快,且金浸出率相对较高;在优化条件下,经过1 h的硫脲浸出,金浸出率可达92. 2%,银浸出率可达48. 6%;硫脲浸出工艺可实现快速高效回收金精矿焙砂中金的目的。     

锌加压酸浸渣中硫磺的回收方法研究

对比分析了浮选法、热过滤法和硫化铵法回收锌加压酸浸渣中硫磺的优缺点。考察了硫化铵溶液浸出浮选硫精矿、硫化物滤饼和多硫化铵母液热分解过程的影响因素。结果表明,液固比和硫化铵浓度对硫磺浸出效果影响较为明显,在最佳试验条件下硫化物滤饼中硫的浸出率约为95%,浮选硫精矿中硫的浸出率和回收率均达到98%,多硫化铵母液热分解后获得的硫磺产品纯度高达99.57%。硫化铵浸出渣中有价金属富集倍数较高,有利于锌加压酸浸渣的综合利用。     

赞比亚某硫化镍精矿氧压酸浸研究

以赞比亚某铜镍矿浮选得到的硫化镍精矿为研究对象,采用加压湿法冶金工艺处理,研究镍、铜、铁的浸出行为,考察了浸出温度、硫酸用量、氧分压、液固比、反应时间等因素的影响。在200℃、硫酸用量每吨精矿100kg、氧分压0.5MPa、液固比4∶1、反应时间3h的优化条件下进行浸出,镍和铜的浸出率均大于99.5%。高温和高氧分压条件利于镍的浸出,镍浸出速度更快。维持上述条件不变,将氧分压增大到0.8MPa时,仅需浸出1.5h,镍的浸出率就可达到99%左右。     

氯离子对难处理金精矿生物预氧化-炭浸氰化的影响

高盐矿区往往缺乏淡水资源供生产使用。针对矿区盐水现状,进行高砷难处理金精矿生物氧化-氰化提金试验,考查不同氯离子浓度对硫化物氧化率、金浸出率等技术指标的影响。结果表明,氯离子浓度对金精矿生物氧化的不利影响随着浓度的升高而增强,氯离子浓度1.5 g/L以上时,硫化物的氧化率显著降低,10 g/L氯离子盐水生物氧化延长至18 d,砷浸出率88.4%,硫氧化率仅为35.3%。相同生物氧化渣在相同氰化条件下采用清水和10 g/L氯离子盐水进行氰化浸出时,盐水将降低金的浸出率。1.5 g/L、5 g/L氯离子盐水生物氧化10 d后的氧化渣采用10 g/L氯离子盐水氰化,金的浸出率分别比清水氰化时的分别低2.8、3.4个百分点。难处理金精矿生物氧化砷浸出率均高于硫氧化率,表明毒砂氧化率高于黄铁矿,金浸出率与毒砂氧化率的相关性较黄铁矿氧化率更加密切。     

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)