电解低NaCl海水生产次氯酸钠的阳极材料

研制了一种能在NaCl含量低(0.058～0.258 mol/L)的海水中电解生产次氯酸钠的阳极.用NaCl含量为0.058 mol/L的溶液作电解质,生产次氯酸钠的电流效率为67%,阳极使用寿命可达13 500h.     

元阳金精矿矿浆电解的阳极过程

通过在氯盐介质测量云南元阳金精矿中几种成分在石墨阳极上的阳极极化曲线，研究矿浆电解条件下矿粒阳极氧化的机理。结果表明，在元阳金精矿矿浆电解的条件下，黄铜矿、黄铁矿、元素硫基本不发生阳极氧化，而H2S则在石墨阳极上或被溶液中的Fe^3 和Cu^2 氧化为元素硫。     

粗铋二段阳极熔盐电解精炼第二段工艺

在二段阳极熔盐电解的第一段研究的基础上，进一步研究了对含铅、银较少的中铋进行处理的第二段电解精炼的工艺条件，包括电流密度、电解质体系、电解温度、阳极铋的厚度等。适当控制这些条件可将中铋中少量铅和银有效地除去，在阳极获得符合国家一级铋要求的精铋，在阴极得到含有铋、铅、银的合金。     

表面活性剂存在下电解硫化物的阳极去除钝化研究

本文报道了在表面活性剂ＨＴＡＢ存在下硫化钠水溶液的电化学氧化，比较了在不同温度和电极材料等各种条件下硫（Ⅱ）的电化学氧化情况和阳极极化曲线形状，并对它们作用的机理进行了讨论。结果表明ＨＴＡＢ能有效地消除硫沉上起的阳极钝化。     

电解冶金中新型涂层钛阳极的研究和应用

电解冶金中，在氯倾物体系电积金属，主要研究涂层钛阳极钝化原因，并对阳极导电性能进行改进，取得节省电能消耗的效果，在硫酸盐体系电积金属，通过添加铱等活性元素，大幅度地提高了涂层钛阳极电催化活性及阳极工作寿命，快速寿命比Ｂ配方的增加２１２倍；在氯化物硫酸盐混合体系电积金属，研究了硫酸根含量对放氯效率的影响。本文研制的涂层钛阳极已在国内一些冶金厂应用。     

钙熔盐电解石墨阳极破损机理探索

研究钙熔盐电解过程中石墨阳极的破损机理及延长阳极使用寿命的方法。结果表明石墨阳极的破损主要原因是凝结在石墨孔隙中的挥发电解质水解和脱水膨胀产生应力，其次是石墨阳极孔隙中活性高的颗粒氧化。延长石墨阳极寿命的措施是提高石墨阳极质量或进行表面处理。     

NiAl2O4基惰性阳极的制备及电解腐蚀研究

采用热压方法研制了Al-Ni-Cu-O系金属陶瓷惰性阳极,阳极的成分以NiAl2O4尖晶石陶瓷为基体,含有10%～20%(wt)Cu和Ni的混合粉末,制得阳极试样的相对密度可达99%,该种阳极在900 ℃左右的电导率大于80 s/cm.采用自制的Ф150 mm×12 mm阳极,在150 A电流的情况下稳定电解24 h,对阳极的动态腐蚀行为进行研究.对电解后阳极的XRD研究发现,从阳极中心到表面NiO量逐渐增加,在阳极表面有新的NiO相生成,对比阳极中不同相的热膨胀性能,认为新相的生成导致了阳极的膨胀和分层.     

用离子交换法从镍电解阳极液中除铜的研究

通过比较国内外现行从镍电解阳极液中除铜的各种方法, 提出了一种新的除铜方法:将阳极液中的Cu还原后再进行离子交换除铜。考察了还原电位对离子交换操作容量的影响, 发现随着还原电位的降低, 离子交换操作容量增大, 当电位达到0.47～0.45 V时, 其操作容量达到最大。得出镍电解阳极液中Cu²⁺还原为Cu⁺的最佳条件为:硫系数为4.5, pH为2.0, 反应时间为0.5 h,反应温度为40 ℃。通过离子交换试验发现:随着高径比的增加, V₂/V₁(漏穿体积/树脂体积)增加, 当高径比达到48.08之后, V₂/V₁基本不变;随着线速度的增加, 漏穿体积呈二次曲线减少, 其方程为:Y =1 301.5-161.5X +5.75X²;随着离子交换交前液Cu离子浓度的增加, 树脂操作交换容量减少;在整个交换过程中SO₄^2-浓度基本上没有太大变化, 整体呈下降的趋势。     

少烟优质阳极糊的研究

对少烟优质阳极糊进行了研究。其措施是：其一对中温沥青进行空气吹炼法改性；其二减少粘结剂沥青的配入量。此外，测试了原料及自焙阳极糊的各种理化性能。测试结果表明：自焙阳极糊的粘结剂需要量是流动性指标和原料性质的函数；自焙阳极糊的生坯表观密度不依流动性指标而变，而是原料性质的函数；所制得的自焙阳极糊其机械强度，孔隙率，比电阻，挥发份都有明显改善，这在铝电解中，对增加电流效率，降低电能单耗有着重大的经济意     

Study on sintering technique of NiFe2O4/SiCp used as matrix of inert anodes in aluminium electrolysis

In order to improve deficiencies of NiFe2O4 spinel used as matrix of inert anode in aluminium electrolysis, NiFe2O4/SiCp were prepared by the solid state reaction for the first time. Microstructural changes were observed by scanning electronic microscope and phase was determined with X-ray detector. Effect of sintering temperature and times on density, porosity and microstructure were researched, and the reasons that caused the difference were discussed deeply. At the same time the thermodynamical compatibility of NiFe2O4 and SiC was proved under 1200℃ by DTA.The results showed that the microstructure was more homogeneous when the sintering temperature reached 1 180℃and the density attained their maximum about 6 h sintering. The appropriate sintering technique of NiFe2 O4/SiCw composite materials was 1180℃× 6 h.     

Study on sintering technique of NiFe2O4/SiCp used as matrix of inert anodes in aluminium electrolysis

In order to improve deficiencies of NiFe2O4 spinel used as matrix of inert anode in aluminium electrolysis, NiFe2O4/SiCp were prepared by the solid state reaction for the first time. Microstructural changes were observed by scanning electronic microscope and phase was determined with X-ray detector. Effect of sintering temperature and times on density, porosity and microstructure were researched, and the reasons that caused the difference were discussed deeply. At the same time the thermodynamical compatibility of NiFe2O4 and SiC was proved under 1200℃ by DTA.The results showed that the microstructure was more homogeneous when the sintering temperature reached 1 180℃and the density attained their maximum about 6 h sintering. The appropriate sintering technique of NiFe2 O4/SiCw composite materials was 1180℃× 6 h.     

Study on sintering technique of NiFe_2O_4/SiCp used as matrix of inert anodes in aluminium electrolysis

1IntroductionResearch demonstratedthat NiFe2O4spinel used as matrix of inert anode was appropriatein aluminiumelectrolysis[1,2].NiFe2O4spinel is with chemical inertness and electrochemical stability,but alsois in pos-session of high temperature resistance,high stress and hardness[3].But then its electro conductibility,toughness and resistance to thermal shock can't meet a demand when it is used in aluminiumelectrolysis,resultedin the anode cracked and the purity of the electrolytic Al bastar…     

Utilization of circulating dump water in the form of hypochlorite solution to decontaminate municipal sewage waters

The process for electrochemical water treatment has been developed for a concentrator of Mirninskii Mining Complex to prolong the service time of the tailing dump by utilizing the excess mineralized circulating water as hypochlorite solution to decontaminate municipal sewage waters. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 6 pp. 109–117, November–December, 2007.     

海下采煤软弱覆岩导水断裂带发育高度研究

龙口矿区海域煤层开采后软弱覆岩导水断裂带的发育高度直接影响了海下安全开采。在分析龙口矿区海域软岩工程地质特征的基础上,运用有限差分法、相似材料模拟试验并结合现场实测资料,研究了海下采煤软弱覆岩变形破坏规律。结果表明：煤层顶板软岩剪切破坏后,裂隙连通性及导水性相对较弱,岩体仍具有一定阻水能力;海底煤层开采后,覆岩垂直剖面由上至下分为剪切破坏带、拉剪破坏带和拉伸破坏带;开采过程中,导水断裂带高度随工作面推进逐渐增加,并最终达到稳定;6 m厚煤层采全高时,导水断裂带发育高度为48.2~55.0 m。最后,经统计提出了海下采煤软弱覆岩中导水断裂带发育高度的计算公式。     

老挝Sepon解吸电解项目建设过程中的技术把控

老挝Sepon解吸电解项目建设基于黄金的扩产与降本增效的初衷,其中涉及工艺设备、建设安装及运营监测等环节涉及诸多技术的把控问题。在疫情影响下的海外金矿建设面临诸多挑战,对各环节技术的严格把控对项目的顺利竣工投产至关重要。     

从石菉铜阳极泥中提取金银的研究

广东石铜阳极泥成分复杂 ,金银含量低 ,砷含量高 ,属难处理的物料 .采用酸浸和氨浸预处理 ,再氰化的方法 ,可有效地回收各有价金属 ,特别是金、银的回收率高 ,同时消除了砷对环境的污染 .试验指标如下 :氰化的浸出率为 Au 97% ,Ag 94 % ,回收率为 Au96 .6 % ,Ag 93.3% .该工艺流程简单 ,适应性强     

含铝添加剂对炭素阳极空气/CO2反应活性的影响

铝电解用炭素阳极在电解生产过程中,除发生阳极反应外,还与空气及阳极反应产物CO2发生氧化反应,导致炭素阳极的过量消耗.为降低炭素阳极的过量消耗,制备了添加不同含铝添加剂(Al、Al4C3、AlF3和Al2O3)的炭素阳极试样,采用等温热重法测试其空气/CO2反应活性.结果表明,多种含铝添加剂可降低炭素阳极在450℃下的空气反应活性和970℃下的CO2反应活性,且随着添加剂Al4C3、AlF3和Al2O3含量的提高出现最小活性值,但是各种添加剂都提高了阳极在550℃下的空气反应活性.     

How to intensify a fine cleaning process for diamond concentrates by using the products of aqueous environment electrolysis

An electrochemical water-treatment technology is developed to improve the quality and color of diamonds, and to neutralize acidic flows. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 2, pp. 107–114, March–April, 2006.