铁矿石球团法(造球与热固法),在一代的时间内,已经从实验室研究发展到工业性生产。到一九七三年,北美洲的铁矿石球团年产量就已超过六千三百万吨(表1)。奥托·格兰普绘制的曲线图示出了此期间北美洲历年球团总产量。虚线部分表示作者对到一九八○年止的推测产量。有理由相信:这些曲线将继续上升。这确实是一项显著的成果。 Iron ore pellet method (pelletizing and thermosetting method), in a generation of time, has been developed from laboratory research to industrial production. By 1973, the annual iron ore pellet production in North America had exceeded 63 million tons (Table 1). The graph plotted by Otto Grant shows the total pellet production in North America over the years. The dotted line shows the author’s speculated production until 1980. Reason to believe: these curves will continue to rise. This is indeed a notable achievement.