We can make superior absorption materials by using iron-sand (magnetite ore) tailings.
用铁砂(磁铁矿)尾矿为原料可制备性能优良的吸收材料。
2
When these rocks break down into the grains that make up the sand on our beaches, their colour is mostly determined by the presence or absence of iron.
当岩石分解成为颗粒够成沙滩时,颜色则是由铁元素氧化物的存在与否决定的。
3
Granulated slag (slag sand) from the manufacture of iron or steel.