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高中温盐浴炉是我厂大批量生产汽车拖拉机进、排气门和高强度螺丝的重要热处理设备,其炉膛工作条件恶劣,长期承受高温熔盐的浸蚀,因此它造成了盐浴炉最易失效的部分,我厂最初用高铝耐火砖砌制,后又改用磷酸耐火混凝土捣打,采用这两种方法制成的盐浴炉炉膛,所需时间长,使用寿命短,一般仅用三个月左右,而且当更新炉膛时,拆除也很费工。 我厂先后两次对埋入式盐炉进行改进。先是设计出一种整体坩锅式炉膛,如图(1)所示。 这种炉膛安装非常简单,在盐炉内壳内底部放置一层普通耐火砖,其上铺一层耐火粉,然后放入整体式坩锅炉膛,并在其四周用普通耐火砖与内炉壳固牢,并填入耐火粉捣紧。内炉壳和外炉壳间充填保温粉,然后装入主副电极,用耐火石绵绳浸“701”磷酸泥浆塞填电极与坩锅炉膛孔之间的间隙,使其不漏熔盐,然后安装活动水套,如图(2)所示。该炉可用半年以上,较改造前寿命提高一倍多,当电极烧损后需要更新炉子也十分容易,只要把炉膛内壳连同坩锅一并吊出、倒掉粉料,用锤击坏坩锅,取出剩余电极,把损坏部分割掉,焊上新的一段电极,即可重新安装使用。
High temperature salt bath furnace is our factory mass production of automobile tractor into the exhaust valve and high strength screws important heat treatment equipment, the furnace working conditions harsh, long-term high temperature molten salt erosion, it caused the most salt bath furnace Volatile part, I plant the first high-alumina refractory brick system, and then use phosphoric acid refractory concrete ramming, using these two methods are made of salt bath furnace, the time required, the service life is short, generally only It took about three months or so and the demolition was laborious when the furnace was renewed. I plant twice on the embedded salt furnace to improve. First, design a whole crucible hearth, as shown in Figure (1). This furnace installation is very simple, put a layer of ordinary refractory brick in the bottom of the salt furnace shell, the top layer of refractory powder, and then into the monolithic crucible hearth, and around it with ordinary firebrick and the inner shell Solid, and filled with refractory tamping. The furnace shell and the outer shell filled with insulation powder, and then into the main and auxiliary electrodes, with fire-resistant rock wool dip “701” phosphoric acid mud plug electrode gap between the electrode and the crucible bore, so that it does not leak molten salt, Then install the activity water jacket, as shown in figure (2). The furnace can be used more than six months, more than double the life before the transformation, when the electrode needs to be updated after the furnace is also very easy to burn, as long as the inner shell of the furnace together with the crucible hanging out, drained powder, Pot, remove the remaining electrodes, the damaged part cut off, welding a new section of electrodes, you can re-install the use.