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锰是黑色金属中最常见元素,在炼钢、炼铁时常作为脱氧剂、脱硫剂而加入。锰在铁中主要以MnS状态存在,锰和硫作用可防止热脆并提高钢的可锻性。当锰钢中含锰超过10%时,强度提高,特别耐磨。通常锰的分析方法有两种:滴定法和光度法。用滴定法进行测定,主要是用过硫酸铵氧化-亚砷酸钠-亚硝酸钠滴定和磷酸三价锰滴定法,前者对酸度要求比较高,锰氧化时应在小于4mol/L的酸度下进行,但也不能太小,否则会有沉淀析出;而用后者时氧化过程不
Manganese is the most common black metal elements, steelmaking, ironmaking often as a deoxidizer, desulfurizer and added. Manganese is mainly present in the MnS state in the iron, and the action of manganese and sulfur prevents the hot embrittlement and improves the malleability of the steel. When manganese manganese in more than 10%, the strength increased, especially wear-resistant. There are two general methods of manganese analysis: titration and spectrophotometry. Determination by titration, mainly ammonium persulfate oxidation - sodium arsenite - sodium nitrite titration and titration of phosphoric acid trivalent manganese, the former is relatively high acidity, manganese should be less than 4mol / L of acidity , But not too small, otherwise there will be precipitated; and the latter when the oxidation process is not