A smelting process in which heavy metals are extracted from heavy metal ores in the form of a salt solution, then electrolyzed using an insoluble anode to obtain the metal at the cathode. Electrowinning of zinc Zn is the most widely used method. First, zinc ore ZnS is roasted to produce an oxide, which is then dissolved in sulfuric acid to produce a zinc sulfate ZnSO4 solution, which is then electrolyzed using a lead plate as the anode and an aluminum plate as the cathode. It is also used to obtain cadmium Cd, manganese Mn, chromium Cr, nickel Ni, cobalt Co, etc. [Fueki Kazuo] Source: Heibonsha World Encyclopedia, 2nd Edition Information |
重金属鉱石から重金属を塩水溶液の形で抽出し,不溶性陽極を用いて電気分解して,陰極に金属を得る製錬法。亜鉛Znの電解採取は最も広く行われている。まずセン亜鉛鉱ZnSを焙焼して酸化物としたのち,硫酸に溶解して硫酸亜鉛ZnSO4の溶液をつくり,鉛板を陽極,アルミニウム板を陰極として電気分解を行う。そのほかカドミウムCd,マンガンMn,クロムCr,ニッケルNi,コバルトCo等を得るのにも用いられる。【笛木 和雄】
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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