Magnetic Separation of Alkali-and Alkaline Earth-lon Groups from a Simulated HLLW

模拟 HLLW 中碱基和碱土基团的磁分离

• 批准号: 05680419
• 负责人: YANAGI Tadashi
• 金额: $ 1.28万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05680419/
• 关键词: magnetic separation; group partitioning; high level liquid waste; cesium; strontium; ferrite seeding; carbonate precipitation; ferric ion flocculant; 高レベル廃液; フェライト添加物; 沈殿; 水酸化物; 炭酸塩; pH-値

On the electromagnetic separation technique, through which the components of a high level liquid waste are partitioned into four gruops with the aid of iron ferrite additives, the following matters have experimentally been examined ;(1) The selection of an effective packing material in an electromagnetic separation column,(2) The effect of coprecipitant and flocculant on the recovery of precipitates of alkaline earth carbonates from the solution, and(3) The scheme by which strontium and cesium ions are recovered at high percentage from a simulated high level liquid nuclear waste.The sample solution was prepared by denitration with formic acid to pH=1 of 2.5M nitric acid solution of a simulated high level liquid waste, and by centrifugation to remove precipitates formed.(1) Selection of packing material ;Three types of stainless steels were tested : (a) sus-410 net (0.1mm wire dia., 1*2mm mesh width), (b) -440 ball (6mm dia.) and (c) -434 coiled ribbon (0.1mm thick., 0.5mm width). Among … More these steel (c) was preferable to others on the durability to nitric acid and on the trapping efficiency of ferrite particulates from solution. This is probably due to the great contribution of a high gradient magnetic field generated at ribbon edges in the column.(2) Coprecipitant and flocculant ;Cadmium ion and ferric ion were chosen as a coprecipitant and a flocculant, respectively. The former showed no effect in the Strontium carbonate precipitation, but the latter greatly contributed to strontium recovery at higher percentage than 97%, without decreasing high recovery of cesium.(3) Separatio scheme ;From the results, the operation shceme was proposed as one which included the carbonate formation, combined with the ferric ion flocculant as well as with iron ferrite additive. The scheme proved effective in mutual separation and recovery of cesium and strontium ions from a simulated high level liquid waste at prcentage higher than 97%, using an electromagnetic filtration column packed with coiled ribbons of sus-434. Less

在高放废液的电磁分离技术中，利用铁氧体添加剂将高放废液的组分分成四组，进行了实验研究。(1)电磁分离塔中有效填料的选择；(2)共沉淀剂和絮凝剂对碱土碳酸盐沉淀物从溶液中回收的影响；(3)从模拟高放废液中高比例回收锶和铯离子的方案。用甲酸将模拟高放废液的2.5M硝酸溶液脱氮至pH=1，并通过离心法去除形成的沉淀物制备样品溶液。测试了三种类型的不锈钢：(A)SUS-410网(线径0.1 mm，网宽1*2 mm)，(B)-440球(直径6 mm)。和(C)-434卷带(0.1 mm厚，0.5 mm宽)。在…中此外，这些钢(C)在硝酸耐久性和对溶液中铁氧体颗粒的捕集效率方面优于其他钢(C)。这可能是由于柱内带状边缘产生的高梯度磁场的巨大贡献。(2)共沉淀剂和絮凝剂，分别选择镉离子和铁离子作为共沉淀剂和絮凝剂。前者对碳酸锶沉淀没有影响，而后者对锶的回收率大于97%有很大贡献，但不降低铯的高回收率。(3)分离方案。根据分离方案的结果，提出了包括碳酸盐生成、铁离子絮凝剂和铁氧体添加剂的操作方案。该方案在模拟高放废液中相互分离和回收铯和锶离子被证明是有效的，使用填充了SU-434卷带的电磁滤柱，回收率高于97%。较少

项目成果

Todashi Yanagi: "Group partitioning of simulated HLLW components with use of iron ferrite additive" J.Nucl.Sci.Technol.,. 30. 1010-1016 (1993)

Todashi Yanagi：“使用铁氧体添加剂对模拟 HLLW 组件进行组划分”J.Nucl.Sci.Technol.,。

Tadashi Yanagi: "Group partitioning of simalated HLLW components with use of iron forrite additive" J.Nucl.Sci.Technol.,. 30. 1010-1016 (1993)

Tadashi Yanagi：“使用铁镁铁矿添加剂对模拟的 HLLW 成分进行分组”J.Nucl.Sci.Technol.,。

Yanagi, T.and Horiike, K.: ""Group Partitioning of Simulated HLLW Components with Use of Iron Ferrite Additive"" J.Nucl.Sci.Technol.30 [10]. 1010 (1993)

Yanagi, T. 和 Horiike, K.：“使用铁氧体添加剂对模拟 HLLW 组件进行组划分”J.Nucl.Sci.Technol.30 [10]。