Grates are used in boilers or...Industrial FurnaceComponent for stacking solid fuel and ensuring efficient combustion. The entire grate mainly consists of two parts: the frame and the grate plates. The grate plates are typically made of cast iron, maintaining necessary ventilation gaps between them after assembly. Often, a regulated ventilation chamber is set beneath the grate to allow air to enter through the gaps and burn off the ash and slag from the fuel layer, which can then be removed manually or mechanically.