General situation of sampling and sample preparation technology of iron, manganese and chromium ores
GUO Chengwei, WANG Huan, JIANG Xiaoguang, WANG Yanjun
Bayuquan Customs P. R. China, Yingkou 115007, China
Abstract：The main raw materials of the iron and steel industry were iron ore, manganese ore, and chromium ore, which had a large dependence on foreign dependence of 80%, 55%, and 95% in China. Quality disputes often occured in trade, and some quality, the focus of the dispute was on sampling and sample preparation techniques. From the perspective of affecting the representative sample, the technical requirements for the method standards, quality variation, sample locations, minimum number of increments, minimum quality of increments, division method, minimum mass of divided sample and equipment involved in sampling and sample preparation were introduced. The problems in sampling and sample preparation were analyzed, and the measures to ensure that sampling and sample preparation personnel can correctly implement method standards and take representative samples are put forward.
Keywords：iron ore; manganese ore; chromium ore; direct reduced iron; sampling; sample preparation
GUO C W，WANG H，JIANG X G，et al. General situation of sampling and sample preparation technology of iron，manganese and chromium ores[J]. Chemical analysis and meterage，2020，29(3)：137-143.