酸法地浸浸出液铀浓度神经网络预测模型的研究

影响酸法地浸浸出液铀浓度的因素很多, 采用传统方法难以建立精确的数学模型, 或模型预测精度不高。在揭示浸出液铀浓度混沌特性的基础上, 利用混沌特性处理输入样本及确定神经网络结构, 将神经网络与改进型遗传算法结合, 构建了基于改进型遗传算法的浸出液铀浓度神经网络预测模型。     

红土矿还原焙砂常压酸浸液用SO2/O2氧化除铁的研究

在实验室条件下采用SO2和O2混合气体为氧化剂,开展了从预还原焙烧红土矿常压酸浸液中氧化、除铁的研究.模拟浸出液中Fe2+的质量浓度为10.2 g/L,实验温度分别为60、70、80和90℃.氧化后的Fe(Ⅲ)基本以针铁矿的形式沉淀除去,沉淀过程中加入碱式碳酸镁为中和剂以维持溶液pH值恒定.氧化、沉淀除铁的pH值控制范围为1.7至3.2.实验结果表明,SO2和O2混合气体可加速Fe2+的氧化,且SO2的优化配比取决于混合气体的流量.在优化配比情况下,混合气体中SO2的利用率在97%左右.SO2含量超过最优配比时,过量的SO2则会被溶液中的Fe3+氧化.除铁沉淀渣中的镍含量(质量分数)不超过0.05%,镍仅有少量损失于除铁渣中.     

Studies on the Extraction of Manganese from Sea Nodule Residue as Ferrosilicomanganese

Most of the extraction processes developed for the polymetallic sea nodules concentrated mainly on the recovery of strategically important metals viz. Cu, Ni and Co. The residue generated in such processes is quite high enough to upset the environmental balance for industrial scale operation. The economics of the process too cannot be favourable if manganese in the residue is not recovered. In this study an attempt has been made to utilize this residue, containing appreciable amount of manganese (about 20%) for producing ferrosilicomanganese, an important ferroalloy primarily used for deoxidation in the steel industry, through smelting process. In order to have an alloy of standard grade, the residue is enriched in its manganese content, by blending it with ferromanganese slag. Bench scale studies indicate that it is possible to produce ferrosilicomanganese, of the grade required by the steel industry, by reduction smelting of the sea nodule residue with ferromanganese slag. Metal recovery, however, was less because of metal entrapment.     

生物质还原浸锰液净化制备硫酸锰工艺研究

使用植物副产生物质对锰银多金属矿还原浸出, 得到浸出锰液。采用一类价廉、具有吸附功能的天然硅酸盐矿物处理生物质浸出锰液, 净化后制得硫酸锰。该方法具有工艺简单、吸附剂添加量少、除杂效率高、处理成本低的特点, 解决了生物质浸锰工艺长期存在的所制硫酸锰产品档次低的难题, 制备的硫酸锰可以同时达到HG/T2962-1999工业硫酸锰和HG/T2936-1999饲料硫酸锰标准; 研究技术具有较好的推广应用前景。     

从锌阳极泥中综合回收锌锰并富集铅银的研究

主要以锌电积过程中产生的锌阳极泥为原料,采用全湿法工艺流程,开展对锌阳极泥综合回收处理,先经酸洗,然后在硫酸介质中进行还原浸出,浸出液经净化、合成等工序,生产出更具应用与市场前景的锰产品。试验结果表明：锌阳极泥通过酸洗,锌的脱除率达90％以上,再经还原浸出,锰的浸出率超过92％,合成得到的锰产品符合国家标准要求,锰回收率在90％以上。浸出渣为铅银渣,渣中铅、银含量较锌阳极泥富集了3～4倍,利于后续铅银等贵金属的回收利用。     

ICP-OES测定西藏铜矿浸出液中铜铅锌等8种矿物组分

电感耦合等离子体光谱法测定西藏铜矿浸出液中8种矿物组分,讨论了元素分析谱线选择、背景校正等因素。结果表明,在高海拔地区仪器参数优化条件下,元素间也没有干扰且该方法快速,准确可靠,各元素检出限5.6~42μg·m L-1之间,加标回收率为92.5%~106%,相对标准偏差RSD均小于1.0%,适用于高海拔条件下对铜矿浸出液的日常检测。     

湿法炼锌超浸渣的浮选研究

某铅锌冶炼厂湿法炼锌超浸渣组成复杂、酸度高、粒度细,存在部分硅胶,是一种难选物料。采用一粗、一扫、一次空白精选流程,添加硫化钠—丁铵黑药组合剂混合浮选铅、银,可获良好指标。     

Application of diffusion dialysis for reduction of acidity of real pregnant leach solutions containing Ni and Co ions

ABSTRACT

Diffusion dialysis (DD) was proposed as a pretreatment step to reduce the acidity of real sulfate/chloride pregnant leach solutions containing cobalt(II) and nickel(II). Optimum DD conditions that enable reduction of acidity in the feed while maintaining a high rejection level of metal ions present in PLS were proposed, e.g. for 0.06 dm³/min flow of both aqueous phases H⁺ concentration in the dialysate reached 3.8 and 2.99 M for PLS1 and PLS2, respectively. Acid diffusion coefficients varied from 0.32 ?10 ^?6 to 3.15?10^?6 m/s and decreased with increasing phase flow rates. Moreover, dialysate neutralization was beneficial for the H⁺ reduction in the feed.     

基于人工湿地的组合处理系统净化校园人工湖设计

对成都某高校人工湖现状进行调研,并对目前国内外人工湖、景观水的水处理方法进行了比较,结合校园人工湖具体情况,采用"动力循环+砂滤+跌水充氧+人工湿地+湖体"生态组合处理系统进行校园人工湖的净化,并加装二氧化氯发生器用于藻类多发期的除藻,运行效果良好.     

硫脲法电镀污泥中提金研究

在电镀行业中金是常用的贵金属之一,提高含金污泥金的回收率一直是研究的热门。论文用酸性硫脲从电镀污泥处理后的树脂中回收金,并探讨了该方法的最佳工艺条件。结果显示,在40℃恒温搅拌条件下用FeCl3.6H2O(加入量2 g/L溶液)、硫脲(浓度1.0 g/L)的混合溶液(pH=1.5)浸取12 h,浸金率最高,可达85%。