前言二十年前,世界上第一坐大型工业性球团厂投入生产并达到了设计能力,这就是这一新兴工业的开端。二十年以前,世界上的球团基本上都是由试验厂生产的,年产量总共只有几千吨。今天,世界球团总产量已略超过2.8亿吨/年。对于任何一种工业部门说来,这确实是一个巨大的增长。生产能力如此增长,显然要伴随以生产工艺、设备以及 Foreword Twenty years ago, the world’s first large industrial pelletizing plant was put into production and reached design capacity, which is the beginning of this emerging industry. Twenty years ago, the pellets in the world were basically produced by pilot plants, with a total annual output of only a few thousand tons. Today, the world pellet production has slightly exceeded 280 million tons / year. For any industrial sector, this is indeed a huge growth. This growth in production capacity, apparently accompanied by the production process, equipment and