LaCl3-HCl-H2O体系部分相图的测定

在25, 35和45 ℃下, 测定了LaCl3在纯水及低于30%的盐酸中的溶解度, 盐酸的浓度范围为0～9.583 mol·L-1. HCl的含量用NaOH滴定, 用甲基橙作指示剂, Cl-的总浓度用AgNO3滴定, 以K2CrO4为指示剂, 滴定时溶液的pH值为4～6, LaCl3的含量通过总的Cl- 含量和H+ 量的差值计算而得. 采用湿固相法构建了上述温度下的LaCl3-HCl-H2O体系的部分相图. 相图表明, 在上述各温度下从LaCl3饱和溶液中析出的固相组成均为LaCl3·7H2O.     

矿用液压升降平台的设计

为解决矿井较高处物品升降运装、拆卸问题,研制了剪叉式液压升降平台。平台包括脚踏式液压泵动力驱动与控制,剪叉机构。该机结构简单,设计新颖,升降平稳,操作方便灵活,载重能力强,升程长,是一种实用的升降和承载设备。     

铜矿尾砂及低品位铜矿的电化学浸出

研究了采用电化学浸出法对铜矿尾砂及低品位铜矿的综合利用。研究结果表明：选取铜矿尾砂与乙炔黑的质量比约为20：1．电解液为0．789mol／L的Na2SO4溶液,溶液的pH取7,电解电流固定在160mA的条件下,以浓度为65‰68％的浓HN03溶解铜矿尾砂所得到的铜为基准,该电解法提铜的提取率高达96．2％．电化学浸出法,可以有效地从铜矿尾砂及低品位铜矿中回收铜。     

Electrogenerative leaching of nickel sulfide concentrate with ferric chloride

In order to utilize the chemical energy in hydrometallurgical process of sulfide minerals reasonably and to simplify the purifying process, the electrogenerative process was applied and a dual cell system was introduced to investigate FeCl3 leaching of nickel sulfide concentrate. Some factors influencing the electrogenerative leaching, such as electrode structure, temperature and solution concentration were studied. The results show that a certain quantity of electrical energy accompanied with the leached products can be acquired in the electrogenerative leaching process.The output current and power increase with the addition of acetylene black to the electrode. Varying the components of electrode just affects the polarization degree of anode. Increasing FeCl3 concentration results in a sharp increase in the output of the leaching cell when c(FeCl3) is less than 0.1mol/L. The optimum value of NaCl concentration for electrogenerative leaching nickel sulfide concentrate with FeCl3 is 3.0 mol/L. Temperature influences electrogeneratire leaching by affecting anodic and cathodic polarization simultaneously. The apparent activation energy is determined to be 34.63 kJ/mol in the range of 298 K to 322 K. The leaching rate of Ni^2 is 29.3% after FeCl3 electrogenerative leaching of nickel sulfide concentrate for 620 min with a filter bag electrode.     

可充无汞碱性锌锰电池电极制备及性能

在无汞锌合金粉中添加无机或有机缓蚀剂制备锌电极,用析氢试验、恒电流放电法、循环伏安法测定缓蚀剂对锌电极性能及抑制锌枝晶生长的影响。在电解MnO2中掺入LiOH和Bi2O3,加入导电剂、粘结剂调浆,涂在发泡镍网上,烘干,压制成MnO2电极,用循环伏安法测定MnO2电极的性能。试验表明,在锌合金粉中添加In2O和PbO可以降低析氢量,加入Bi2O3可以改善电极放电性能;在电解液中加入聚乙烯醇,可以抑制锌枝晶生长,延长锌电极寿命;在EMD中掺入Bi2O3和LiOH,可以提高MnO2电极的可充电性能