国内某含锑复杂金精矿中锑的提取研究

研究使用碱性硫化钠浸出法处理国内某含锑复杂金精矿,将锑与矿物分离并提取,回收锑的同时提高金的回收率。通过试验,在氢氧化钠含量40g/l、硫化钠含量100g/l、温度60℃条件下进行浸出,锑的浸出率可达到91%以上。浸出液通过电积得到锑含量为97%以上的毛锑产品,实现了该金精矿中锑元素的回收。     

低品位硫化锑矿湿法炼锑探索试验研究

低品硫化锑矿经湿法碱性处理,锑的浸出率可达到98.48%,渣含锑0.50%。碱浸液通过隔膜电积处理,溶液中的锑富集成阴极锑,含锑达到90%以上。电积废液中再生的硫化钠用于再次浸出,实现了原料的综合利用,工艺过程安全环保。     

某高砷高铜金精矿综合回收金银铜试验研究

某高砷高铜金精矿含砷高达9.42%,采用加压氧化—氰化工艺处理,铜、金、银浸出率分别为96%～97%、99%、78%,加压氧化过程80%以上的砷固化在氧化渣中。同时开展了铜萃取、萃余液处理、毒性浸出等工艺单元试验,打通整体流程。毒性浸出试验表明,氰化渣、中和渣毒性浸出液中的重金属、砷浓度达标。采用加压氧化工艺处理高砷高铜金精矿是可行的。     

含砷烟尘的综合利用

采用氢氧化钠碱性浸出分离回收含砷烟尘中的砷,在优化试验条件下,砷、锑、铅的浸出率分别为99.27%、1.83%和0.20%;砷浸出液经氧化—冷却结晶回收砷酸钠后返回浸出过程循环利用,整个脱砷工艺闭路循环。采用硫化钠浸出—空气氧化法分离回收含砷烟尘碱浸渣中的锑并制备焦锑酸钠,碱浸渣中锑的浸出率为93.03%,锑浸出液中锑沉淀率为98.51%。采用硫酸浸出—铝板置换分离回收硫化钠浸出渣中的铟并制备海绵铟,铟的浸出率为71.83%。硫酸浸出渣中铅的主要以PbS的形式存在,可以作为铅冶炼的原料返回铅厂回收铅。     

碱性硫化钠浸出含锑金精矿的试验与工业实践

采用碱性硫化钠浸出—无隔膜电积的方法回收含锑金精矿中的锑,在小型试验基础上根据生产场地的实际情况进行了工业实践。通过对电积过程工艺参数优化,锑综合浸出率为96.72%,回收阴极锑纯度96.36%,贫液含锑5.54g/L,综合电流效率63.84%,吨锑氢氧化钠消耗量617.2kg。     

含砷锑金精矿冶炼过程中水污染源及治理措施简析

对含砷、锑成分高的难处理金精矿,采用湿法碱性浸出锑,含锑富液电积生产阴极锑,分离锑后的浸渣焙烧+氰化浸出回收金银,最大限度的回收金、银和锑等有价金属.冶炼过程产生含酸碱及重金属废水和各种贫液,车间存在大量在线液体.采用预处理回收有价金属,污水站采用石灰-铁盐法处理生产废水,将生产废水处理后全部回用于工艺生产,解决了难处...     

金精矿提取金银工艺研究

某铅冶炼厂副产金精矿中含有金、银、砷、锑、铅等，用ＨＣｌ＋Ｈ２ＳＯ４浸出液浸出砷、锑，浸出渣熔炼得金银合金，电解金银合金得纯银粉，处理电解阳极泥产出金粉，金、银总回收率分别为＞９６７６％，＞９６％。     

含锑金精矿的硫化钠碱性浸出液中锑电积试验

采用电化学法从含砷、锑金精矿的碱性硫化钠浸出液中电沉积锑。优化电积过程工艺参数,并考察此过程溶液中金的走向。结果表明,在电积温度50℃、阴极电流密度250A/m2的条件下进行电积,金会随着锑一同在阴极板上沉积,得到阴极锑纯度为97.12%,阴极锑含金22g/t。电积过程中添加聚乙二醇以及降低电流密度可以有效改善阴极锑的质量。     

含砷难处理金精矿工艺技术研究与实践

通过实验室实验及生产性工业实践,研究探索出高效处理含砷金精矿新工艺:硫酸化焙烧+NLS高温浸出+洗涤渣氰化浸出,获得良好的技术指标,金浸出率达到96.5%以上。该工艺简单可行,成功实现了含砷难处理金精矿浸出率低的技术突破,对国内外含砷金精矿处理具有宝贵的借鉴和推广意义。     

含砷、锑、碳难处理金精矿焙烧氰化提金工艺研究

镇沅含砷、锑、碳难处理金精矿直接氰化金浸出率小于 10 % ,采用常规焙烧 -焙砂氰化提金工艺金浸出率仅达到 73 2 % ,而采用先行除锑 ,再焙烧脱除硫、碳、砷的提金工艺方案 ,金氰化浸出率达到90 4 % ,同时锑可作为锑精矿外售 ,经济效益明显。     

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。