钴白合金处理工艺进展及研究方向

随着全球钴需求量的不断增长以及钴资源的日益枯竭,对钴白合金进行高效且低成本的开发处理对于满足钴的增长需求以及钴工业的发展有着重要的意义。为此对当前钴白合金的处理工艺进行了总结,从白合金中回收钴的方法主要有火法-湿法结合工艺和湿法工艺,分析了各种方法的优缺点并指出了白合金处理方法的研究方向。认为湿法工艺中的电化学溶解法及水钴矿-白合金联合浸出法工艺都是颇具前景的提取技术。     

Operating optimality assessment based on optimality related variations and nonoptimal cause identification for industrial processes

In this study, a novel online operating optimality assessment based on optimality related variations and nonoptimal cause identification method is proposed for industrial processes. The optimality related variations are extracted from each steady performance grade by analyzing the common and unique variations among steady performance grades, which avoids the time-consuming data alignment. When the optimality related variations are used in assessment, both the robustness and sensitivity of the assessment method are improved compared with the PCA-based assessment for its abilities in highlighting the process variations related to operating performance and excluding those unrelated variations. Based on the similarities between the optimality related variations of the online data and that of each steady performance grade, the process operating performance can be evaluated as the steady performance grade or the conversion process between performance grades, and this provides more information for the in-depth understanding of the process operating. For nonoptimal operating performance, the nonoptimal cause identification strategy is developed for further production adjustment and performance improvement. Finally, the efficiency of the proposed method is illustrated with a case of gold hydrometallurgical process.     

铅阳极泥湿法处理工艺实践

铅阳极泥是提取金、银等贵金属的重要原料.控制电位在400~450 mV,使铜、锑和铋等贱金属优先于贵金属氧化浸出,贵金属得到富集.采用亚硫酸钠二次分银、甲醛还原银的工艺,得到品位98.86%的粗银,经银电解精炼,可得到99.99%的纯银.采用常温氯化分金、SO2还原得到粗金、粗金二次溶解以及草酸煮沸还原等工艺,得到纯金粉,金粉质量达到国标Au-1的标准.从铅阳极泥至金粉、粗银粉,金、银的直收率分别为95.65%和98.08%.整个工艺设计简短合理,技术指标较为理想.     

铅阳极泥湿法预处理综合回收新工艺

研究铅阳极泥湿法预处理综合回收新工艺：铅阳极泥经过自然堆放氧化后,在硫酸介质中控电位氧化氯化浸出,能有效地实现贵金属与非贵金属的分离。浸出液经过冷却结晶,析出部分砷,其他有价元素留在溶液中。后通过控电位的方法还原沉碲,碲的回收率为96.52%。将沉碲后液依次进行水解沉锑、铁粉还原沉铋铜,锑、铋、砷的回收率均大于91%。该工艺流程简单,无废气产生,中间产物渣不产生堆放污染,可直接进入株冶原有火法系统进一步精炼回收有价金属,终端还原后液可循环使用。     

湿法(化学浸出法)炼铜的近况及展望

随着技术经济的进步，人们环境保护意识的增强，传统的火法炼铜逐渐暴露出一些不合时宜的缺点：一次性投资大，生产成本高，SO2对环境的污染严重。随着铜矿的大量开采，富矿越来越少，能满足火法炼铜要求的精矿来源越来越少，这就阻碍了火法炼铜的发展，湿法炼铜克服了火法炼铜的若干缺点，近20年来获得长足发展。本文介绍了化学浸出法中的氯化铜、三价铁及其它氧化浸出方法。     

失效载体催化剂回收铂族金属工艺和技术

介绍国内外失效载体催化剂回收铂族金属的3种工艺技术：火法、湿法和火-湿法联合工艺，并作简要评论，     

Integrated Technology for Processing Rhenium-containing Molybdenite Concentrates to Recover Molybdenum and Rhenium into Commercial Products

Abstract

The paper reports on processing of molybdenite concentrate to recover molybdenum and rhenium products. The process involves roasting of molybdenite in a fluid bed. The fluid bed exhaust is passed through a cyclone, a electrostatic separator and finally subjected to wet gas scrubbing. The scrub is sent to solid ion exchange resin to produce ammonium perrhenate. The cinder from fluid bed roaster is processed to calcium molybdate and the dust from dust recovery is processed to ammonium paramolybdate.     

法国铀水冶厂工艺现状

介绍了目前法国境内唯一正在运动的铀矿冶厂－ＳＯＣＩＥＴＥ ＤＥＳ ＭＩＮＥＳ ＤＥ ＪＯＵＡＣ（ＳＭＪ）的矿床地质结构、采矿技术以及水冶工艺的一些情况。其矿床主要是花岗岩结构，采用了常规硫酸浸出、溶剂萃取、氧化镁沉淀工艺路线。     

某铜湿法厂工艺改进试验研究

为了降低铁对电积过程的影响, 对某铜湿法厂萃取各工序溶液性质及萃取剂ZJ988的萃取性能进行了研究, 结果表明, 降低萃取剂浓度可以减少铁的萃取量, 而由于萃取剂浓度降低造成的铜传递量的减小可以通过提高反萃酸度来弥补; 当洗涤参数为酸度10 g/L、铜浓度1.0 g/L以上、铁浓度小于2.0 g/L、相比0.8~1.0时, 铁洗涤效果较好。     

高铜钼精矿湿法浸铜工艺试验研究

对某铜矿钼品位43.49%、含铜3.37%的钼精矿进行了湿法浸铜工艺试验。结果表明:酸浸除铜和化学氧化-酸浸除铜工艺,铜浸出率较低,钼损失率较高,未能提高钼精矿钼品位;CJ-1溶液除铜工艺铜浸出率高,钼损失率低,可达到提高钼精矿钼品位并降低含铜的目的。