hematite pig iron

例句：

1. 1. He used to workin a factory that produced hematitepig iron.
   他过去在一家生产赤铁矿和生铁的工厂工作。
2. 2. Thecompany's main product is hematite pig iron, which is widely usedin various industries.
   该公司的主要产品是赤铁矿和生铁，广泛应用于各个行业。
3. 3.The iron ore was mined fromthe nearby mountains, and the pig ironwas then processed into steel.
   铁矿石从附近的山中开采出来，然后加工成钢铁。