日本二十几年以来,在其选矿生产过程中,陆续采用了新技术、新设备和新方法,对其生产的发展,起了一定的作用,其主要者按年限列举如下。 1948年足尾选矿厂开始把重介质选矿作业投入生产。在1958年中,岩国在其选矿厂设计建厂时,第一次在日本采取了平面布置。同在该年,明延选矿厂在自摇床锡精矿中分离硫化矿物时,采用了枱浮方法,为提高精矿品位获得了成功。关于用浮选法处理炼铜转炉渣,是先在日立选矿厂及佐贺关冶炼厂投产,其后,足尾、小坂、东予、以及直岛各厂也相继加以采用。此外,在日立选厂还开始利用γ射线连续测定矿浆浓度并进行记录。 Over the past two decades, Japan has adopted new technologies, new equipment and new methods one after another in its beneficiation process and played a certain role in the development of its production. The major ones are listed as follows according to the number of years. In 1948, the foot tailings concentrator started to put heavy-medium beneficiation operations into production. In 1958, for the first time, Iwakuni took a plane layout in Japan when designing and building its ore dressing plant. In the same year, the Mingyan Concentrator used the Taiwan float method to separate sulphide minerals from the shaker tin concentrate, and succeeded in improving the concentrate grade. Regarding flotation converter slag treatment by flotation, it was first put into operation at Hitachi Concentrator and Saga Kiln Smelter, and thereafter, the footers, Kosaka, Toyo, and Naoshima warehouses were successively adopted. In addition, Hitachi plant also began to use gamma ray continuous determination of pulp concentration and record.