论文部分内容阅读
近三年来,冀东铁矿区群采生产发展迅速,产量逐年翻番,1984年仅产铁矿石20几万吨,铁精粉7.8万吨,到87年底铁矿石产量已达532万吨,铁精粉206万吨;予计建成年处理原矿能力5万吨至40万吨的小选厂近百座,处理原矿能力达800万吨。采矿虽然还比较落后,仍以群采为主,开采一般不够正规,但一年以来,已加强了采矿生产和建设,逐步走向正规。据初步统计已有四分之一的选厂有_r自己配套的采矿场,几个年
In the past three years, the production of group mining in Jidong Iron Ore Area has been developing rapidly and its output doubled year by year. In 1984, it only produced 20 million tons of iron ore and 78,000 tons of refined iron ore. By the end of 87, iron ore output had reached 5.32 million tons , Iron powder 2.06 million tons; to be built into the annual processing capacity of 50,000 tons to 400,000 tons of small processing plants nearly 100, handling capacity of 8 million tons of ore. Although mining is still relatively backward, it is still dominated by mass production. Mining is not generally formal enough. However, over the past year, mining production and construction have been stepped up and gradually become regular. According to preliminary statistics, a quarter of the processing plants have their own matching _r mining field, a few years