Microwave assisted atmospheric acid leaching of nickel from laterite ore

来源 :Rare Metals | 被引量 : 0次 | 上传用户:ren_sir
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The recovery of nickel from laterite ore with sulphuric acid under the effect of microwave irradiation was studied.The experimental results indicated that the extraction rate of nickel was influenced by reaction time,sulphuric acid concentration,and temperature,especially by microwave power.The results obtained from the experiments of orthogonal arrays showed that the optimum conditions of sulphuric acid concentration,reaction time,microwave power,and temperature were 25 vol.%,1.5 h,600 W,and 90°C,respectively.Under the optimal conditions,the nickel recovery could reach approximately 90.8%,which was higher than that obtained by conventional water bath heating.Kinetic experiments showed that the leaching of nickel in a sulphuric acid medium was controlled by chemical reaction occurring on the surface of laterite ore.The apparent activation energy was 38.9 kJ/mol.Microwave heating technology is efficient,clean,and easy to control and facilitate continuous processing of materials. The recovery of nickel from laterite ore with sulphuric acid under the effect of microwave irradiation was studied. The experimental results indicated that the extraction rate of nickel was influenced by reaction time, sulphuric acid concentration, and temperature, especially by microwave power. from the experiments of orthogonal arrays showed that the optimum conditions of sulphuric acid concentration, reaction time, microwave power, and temperature were 25 vol.%, 1.5 h, 600 W, and 90 ° C, respectively. Under the optimal conditions, the nickel recovery could reach about 90.8%, which was higher than that obtained by conventional water bath heating. Kinetic experiments showed that the leaching of nickel in a sulphuric acid medium was controlled by chemical reaction occurring on the surface of laterite ore. The apparent activation energy was 38.9 kJ / mol. Microwave heating technology is efficient, clean, and easy to control and facilitate continuous processing of materials.
其他文献
高校是发展科技的重要方面军改革开放10多年来,我国高等学校科技工作有了长足的发展,已成为我国科学技术事业的一个重要方面军,正在发挥着重大作用。形成一支充满活力的科研大罩到
20 0 0年 4月 2日~ 8日的国际建筑物安全周将推动建筑和建筑物法规在世界范围的宣传和运用。自 1980年以来 ,这个一年一次的活动一直在帮助建筑行业的人士不断地向人们证明他
目的为了更好地进行剂量与效应关系的分析,将高本底辐射地区(HBRA)的人员按村平均的环境γ外照射水平及各自的居留因子估算的村平均有效剂量分成“高”、“中”、“低”三个剂量组和
新的耕耘必然带来新的收获──记河北涿州市教育电视台正式开播本刊记者周伟9目20日,对河北琢州市人民来说是一个不平凡的日子─—涿州市教育电视台成立并正式开播。这是涿州市政
四库全书《四书文》 光绪三十一年(1905),袁世凯、张之洞上《立停科举以广学校并妥筹办法》摺,得到谕允,于是,有着七百年历史的八股文寿终正寝。从此,它被世人视之如敝屣、
用放射免疫法检测49例男性肝硬化患者血清性激素及促性腺激素的结果表明:肝功能失代偿者血清睾嗣(T)水平较同龄正常对照组显著降低;雌二醇(E_2)、E_2/T比值、卵泡刺激素(FSH)
课间操是学校全面贯彻教育方针,实施素质教育的重要内容和途径,不断优化课间活动和结构,对于增强学生体制、陶冶学生情操,有效地对学生进行纪律、意志、作风、德育、以及培养
能引起中毒性肝病的物质有药物,病原微生物、矿物质、工业化学剂及其中间产物、植物等产生的毒素。它们引起的肝病有相似的病理改变,大致可分以下几种: 一、区带性坏死:许多
努力做好“注册视听生”教育的试点工作王明达全国十个省、自治区、计划单列市的教育行政部门、广播电视大学和自学考试机构的有关负责同志开会,研究落实广播电视大学招收“注
烧伤并发急性肾衰的死亡率极高,必须早期预防,早诊早治。治疗以透析和综合疗法为主。急性肾衰时应用速尿无明显疗效,及时截除坏死肢体有助于肾衰逆转,口服甘露醇疗法可供选择