【摘 要】
：
The uranium ores of Xiangshan deposit are complex with high content of clay minerals.Currently,high-grade uranium ore from this deposit is leached by a conventional agitation hydrometallurgical way, b
【机 构】
：
State Key Laboratory Breeding Base of Nuclear Resources and Environment,East China Institute of Tech
【出 处】
：
The 6th International Conference on Hydrometallurgy(第六届国际湿法冶
论文部分内容阅读
The uranium ores of Xiangshan deposit are complex with high content of clay minerals.Currently,high-grade uranium ore from this deposit is leached by a conventional agitation hydrometallurgical way, but the production costs are high and economic efficiency is poor.In this paper, batch tests of stirring bioleaching were conducted in study for the fine uranium ore which ninety percent of particles were less 0.075mm.Acidified test showed that the acid in the range of 30 to 60 gram per liter was good for leaching.The best acid was 30 gram per liter resulting pH less than 2.0 and acid consumption was 8％.This acid is good for bioleaching.Pulpe density test, of which pulpe density ranged from 20％ to 40％, showed that the lower the pulpe density was, the higher uranium extraction would be.The initial ferric concentration test, in which the initial ferric concentration ranged from 1 to 10 gram per liter, showed that the optimum leaching ferric concentration was around 5 gram per liter.These parameters are keys for the next CSTR experiment.Compared to the conventional agitation hydrometallurgy, stirring bioleaching for the Xiangshan uranium ore is a better way to solve those problems such as high acid consumption and long leaching period.
其他文献
某P201泵用在石化设备中,其316L不锈钢管道在使用过程中出现微裂纹.利用扫描电子显微镜和金相显微镜分别观察分析了裂纹表面和剖面形貌、断面形貌及其附近的组织,用能谱分析仪分析了微区成分.
介绍了对金相检验中结构钢低倍组织缺陷评级能力验证结果的评价方法和技术分析.该能力验证计划评价方法较为特殊,对缺陷的评级属于半定量分析,采用了多种评价方法相结合的方式进行评价.该能力验证有利于国家认证认可部门对该领域实验室的监管,同时也可以帮助实验室发现日常检测存在的问题,为提高实验室的测试水平提供依据.
纺织品检测作为一类传统的商品检测,相关检测领域的能力验证并不少见,但在纺织品耐摩擦色牢度的检测能力验证方面可以借鉴的内容却十分稀少.本文主要对2013年国家认证认可监督管理委员会组织的纺织品耐摩擦色牢度的检测(CNCA-13一A13)能力验证实施过程中样品制备的相关经验进行总结,内容包括样品的设计、坯布原料的选择、样品的染制、实验室制作、样品的标识和保存,样品的均匀性、稳定性验证等.
建立电感耦合等离子体原子发射光谱法(ICP-AES)测定金属铬中硅、铝、磷等元素的分析方法.通过试验优化了仪器工作条件,选择了最佳分析谱线,测定了元素的检出限、检出下限,进行了精密度和准确度试验.结果表明:各元素的加标回收率为97.50％～103.00％,相对标准偏差小于4.11％,该方法满足金属铬产品的检测要求.
用盐酸、硝酸、高氯酸溶解不锈钢样品,选择电感耦合等离子体原子发射光谱法(ICPAES)的优化工作参数测定样品中低含量的酸溶铝.通过研究样品中的干扰建立了多谱线拟合(MSF)模型,考察了两条分析谱线的灵敏度、准确度和精密度,确定了方法最佳的分析谱线为394.401 nm,其检测下限达到0.00013％,相对标准偏差小于1％.
Wet chemical methods are widely used for depositing coating layers onto matrix materials, such as cathode materials for lithium-ion batteries[l].LiNi0.8Co0.15Al0.05O2 is one of the most intriguing cat
In the leaching-electrowinning metallurgical process of zinc, the impurity of cadmium contained in the neutral leaching liquor is usually cemented by zinc dust.The purifying precipitation typically co
Based on the large amount of solid waste of high alumina fly ash urgently needed to be dealt with and the status quo of aluminum resources shortage in China, a new process of extraction of alumina fro
Magnesium was enriched in residue obtained by alkali baking the laterite nickel ore baked,following digestion in water of clinker and filtration of slurry.Employing the residue as raw material,industr
Soda ash roasting of the chromite ore is commonly used worldwide for the production of water soluble sodium chromate(TATHAVADKAR et al., 2001).However, chromium conversion yield of the chromite ore on