提高铁精矿品位,是贯彻精料方针的主要内容之一,对加速发展我国钢铁工业意义很大。图1是历年重点铁选厂和磁铁矿选厂的平均精矿品位情况。1978年重点铁选厂的铁精矿平均品位已达61.12％,比1977年提高0.60％。其中磁铁精矿平均品位已突破65％大关,达到 Improving the grade of iron concentrate is one of the main contents of implementing the fine material guideline and has great significance for accelerating the development of China’s steel industry. Figure 1 shows the average concentrate grade of key iron processing plants and magnetite processing plants over the years. The average grade of iron ore concentrates in major iron concentrates in 1978 reached 61.12%, an increase of 0.60% over 1977. One of the average grade of magnetic concentrate has exceeded 65% mark to reach