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铬精矿及铬铁矿在钢铁工业中主要作为冶炼铬铁和制造耐火砖的材料，其中ＭｎＯ和Ｃｒ_２Ｏ_３是必不可少的分析项目。本文提出了连续测定ＭｎＯ及Ｃｒ_２Ｏ_３含量的方法，以瓷坩埚代替镍坩埚，采用Ｎａ_２Ｏ_２熔融试样，直接氧化了Ｍｎ（Ⅱ）与Ｃｒ（Ⅲ），同时分离出锰，在?
Chromium concentrates and chromites are mainly used in the steel industry as smelting ferrochromium and refractory brick making materials. Among them, MnO and Cr2O3 are indispensable analytical items. In this paper, a method of continuously determining the contents of MnO and Cr_2O_3 was proposed. The crucible was replaced by a porcelain crucible and the Na_2 O_2 molten sample was used to directly oxidize Mn (Ⅱ) and Cr (Ⅲ)