经过43年不断进行技术改造,山东黑旺铁矿从手工开采发展到了现在较高水平的机械化作业,年开采高炉原矿最高时可达70万吨。但同时,经过40多年的开采,矿石资源已经面临枯竭,现在仅能维持40万吨/年的生产 After 43 years of continuous technological transformation, Shandong Black Mong Iron Ore developed from manual mining to a higher level of mechanized operation now, with a maximum annual blast furnace ore up to 700,000 tons. However, at the same time, after more than 40 years of mining, the ore resources have been depleted and now only can produce 400,000 tons / year of production