calcination in heaps

例句：

1. 1. The process of calcination is essential for the production of high-quality steel.
   煅烧过程对于生产高质量钢材至关重要。
2. 2. The doctor advised him to undergo calcination treatment for his chronic pain.
   医生建议他接受慢性疼痛的煅烧治疗。
3. 3. During the calcination process, the material is heated and transformed into a new form.
   在煅烧过程中，材料被加热并转化为新的形式。