过滤箱内衬耐火材料
过滤箱：（过滤箱主要由过滤片、密封毡（陶瓷纤维毡）、保温衬里、加热盖、燃气烧嘴、流放孔等组成。）过滤箱的作用是在线除气过程中，通过气泡上浮过程与夹杂颗粒相遇，使其部分携出表面，而剩余的夹杂物需要通过过滤装置除掉。目前过滤净化是熔体铝及铝合金中除去非金属夹杂物的最有效方法，以确保产品质量。
Filter box: (The filter box is mainly composed of filter sheets, sealing felt (ceramic fiber felt), insulation lining, heating cover, gas burner, flow hole, etc.) The function of the filter box is to allow bubbles to float up and meet with mixed particles during the online degassing process, causing some of them to be carried out of the surface, while the remaining impurities need to be removed by the filtering device. At present, filtration purification is the most effective method for removing non-metallic inclusions from molten aluminum and aluminum alloys to ensure product quality.