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有色金属选矿产品中硫的测定,一般采用空气燃烧中和法。在测定硫精矿时,吸收液中常出现黄黑色悬浮物,影响分析结果的准确度和精密度。为查明原因,提高分析质量,进行如下工作。 (一)黄铁矿在加热时的行为硫精矿主要成分是黄铁矿和磁黄铁矿,黄铁矿在空气中加热,当温度升高到300—700℃时,发生 FeS_2 的完全氧化反
Determination of sulfur in non-ferrous mineral concentrates, generally using air-combustion neutralization method. In the determination of sulfur concentrate, the absorption of yellow-black suspended solids often appear, affecting the accuracy and precision analysis results. To identify the reasons for improving the quality of the analysis, the following work. (I) Behavior of pyrite during heating The main components of pyrite concentrate are pyrite and pyrrhotite. Pyrite is heated in the air. When the temperature rises to 300-700 ℃, complete oxidation of FeS 2 occurs anti-