中国钢铁企业所拥有的矿山自产铁矿石量占全国铁矿石产量的比重不超过30%,考虑到国内铁矿石自给率基本维持在50%的水平,据此可推算中国钢铁企业自产铁矿石总量占其铁矿石需求总量的比重应维持在 Chinese iron and steel enterprises owned by the mine production of iron ore accounts for the proportion of the country’s iron ore production does not exceed 30%, taking into account the domestic iron ore self-sufficiency rate remained at 50% level, which can be calculated from the Chinese iron and steel enterprises since The share of total iron ore production in its total iron ore demand should be maintained at