電炉処理ダスト中亜鉛化合物の形態別定量(湿式化学分析)(<特集>最先端の化学分析と物理解析)

概要

論文の詳細を見る
The analytical methods for Zn compounds in the dust recovered from the electric furnace dust have been investigated. The recovered dust contains metallic Zn, ZnO, ZnS and trace amount of Zn(OH)_2 as Zn compounds. The sample was dissolved in the FeCl_3-citric acid solution at room temperature. During the dissolution, metallic Zn reduced Fe(III) to Fe(II) quantitatively. The amount of Fe(II) was determined by the titration with potassium dichromate, and converted to the amount of metallic Zn. The ZnS contained in the residue was dissolved in HNO_3(1+1), and the amount of Zn as ZnS was determined by ICP-AES. The amount of ZnO and Zn(OH)_2 was obtained by subtracting the amounts of metallic Zn and ZnS from the amount of total Zn. The electric furnace dust contained ZnO and ZnFe_2O_4, and the FeCl_3-citric acid solution was used for the separation of ZnO from ZnFe_2O_4. Only ZnO was dissolved in the FeCl_3-citric acid solution, and ZnFe_2O_4 contained in the residue was determined by ICP-AES after alkali fusion and acid dissolution.
社団法人日本鉄鋼協会の論文
1999-02-01