高浸渣资源化综合利用工艺选择分析

介绍了国内外湿法炼锌高温高酸浸出所产高浸渣综合回收现状。根据国内某冶炼厂的实际情况,探讨了高浸渣中银、锌等有价金属回收方法、可行性和项目实施估算效果。     

湿法炼锌净化镍钴渣综合利用生产实践

净化渣综合回收一直是湿法炼锌需要解决的问题之一。本文阐述了湿法炼锌净化镍钴渣浓硫酸全浸及钴分离技术,其有可效回收锌、钴、铅、镉及镍等有价金属,实现镍钴渣高价值综合利用。     

从高铟锌精矿中综合回收锌和铟

某锌精矿中铟含量很高,采用黄钾铁矾法处理该高铟锌精矿,在得到较高锌回收率的同时,大部分的铟进入矾渣,少部分进入高浸渣,从矾渣和高浸渣中可回收得到电铟。锌的浸出率高达98.45%;而95.08%的铟进入铁矾渣可有效回收。生产实践表明采用该工艺,铟的总回收率可达72%,锌的总回收率可达92%。可见,黄钾铁矾法工艺处理高铟锌精矿可以达到综合回收锌和铟的目的。     

酸浸渣强化冶炼工艺研究

针对酸浸渣处理的现状及存在的问题,分析酸浸渣加压浸出回收锌和锗的工艺原理和特点,重点研究加压浸出过程中锌、锗铁的溶出情况.     

从铜锌废渣生产电解铜和硫酸锌

本文用碱洗－氨浸－酸溶－电积法分离回收铜锌熔炼渣和铸造渣中的铜锌，产出电铜和硫酸锌。铜、锌的回收率分别达到９２．４％和９３．１％。工艺条件较易控制，产品纯度高。     

湿法炼锌浸出渣减量化浸出工艺研究

以常规湿法炼锌工艺锌浸渣为研究对象,对比研究常压酸浸和加压酸浸条件下锌浸渣的酸性浸出减量化效果,以及渣中锌、铜和铟等有价金属的浸出率。结果表明,在常压酸浸条件下,渣量可减少65%以上,渣中锌含量可降至3%左右,锌、铜和铟的浸出率均在91%以上;在加压酸浸条件下,渣量可减少40%以上,渣中锌含量可将至2%以下,锌和铜的浸出率达到95%左右,但铟浸出率仅为70%左右,相对较低。常压酸浸过程锌浸渣中的铁绝大部分浸出,有利于铟的浸出;加压酸浸过程锌浸渣中的铁大量以铅铁矾的形式留在渣中,阻碍了铟的浸出。常压浸出液中铁含量较高,达到25 g/L以上;加压浸出液中铁含量较低,小于2 g/L,有利于后续浸出液中铜、铟的回收。常压浸出渣量少,有利于渣中铅、银的富集,可单独销售;加压浸出由于铁沉淀入渣,致使渣中铅、银富集比低,适合于铅锌联合企业返回铅熔炼炉。     

从浸锌渣中高压浸出镓锗的研究

针对目前从浸锌渣中回收镓锗工艺中存在的问题,采用高压酸浸工艺处理该渣,研究了始酸浓度、温度、时间、SO2分压、液固比、搅拌线速度等对镓锗浸出率的影响。结果表明,该浸出渣经二段高温高酸浸出后,锌、铁、镓、锗的累计浸出率分别为92.79%、97.87%、94.09%、75.18%。     

从Cinkur浸出渣中湿法提取锌和铅

Cinkur浸出渣中含有12．43％Zn,15．51%Pb和6．279／6Fe。确定了浸出渣的组成后,分别进行酸浸和盐水浸出试验以回收锌和铅。回收锌的酸浸试验过程中控制酸浓度,反应时间,反应温度和矿浆密度（固液质量比）。     

新技术与成果

从含铁酸锌的浸出渣中回收锌的方法一种从含铁酸锌的浸出渣中回收锌的方法,属于锌湿法冶金渣处理领域;该方法利用振动式活化反应器对浸出渣进行研磨活化,采取先活化后浸出和边活化边浸出两种实施方案,控制适当的液固比、过程反     

湿法炼锌高浸渣浮选回收银的生产实践北大核心

以湿法炼锌高浸渣为原料,采用药剂浮选的方法回收其中的银。针对生产实践中银回收率低的问题,结合物料性质和工艺特点,分析影响银回收的因素,介绍了改进措施。     

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.     

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.     

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。