hematite process

例句：

1. 1. The hematite process is a crucial step in the iron ore beneficiation process.
   赤铁矿工艺是铁矿石选矿过程中的关键步骤。
2. 2. The hematite process involves heating the iron ore to reduce it and produce iron metal.
   赤铁矿工艺涉及加热铁矿石以降低其并产生铁金属。
3. 3. The hematite process has been optimized to increase efficiency and reduce costs.
   赤铁矿工艺已被优化以提高效率和降低成本。