Method for maintaining converter lining at trunnion position of converter

The invention relates to the technical field of converter maintenance, in particular to a method for maintaining a converter trunnion position furnace lining, which comprises the following steps: adding a refractory material and asphalt into a converter, then shaking the converter forwards and backwards to mix the refractory material and the asphalt, supplying nitrogen by an oxygen lance to carry out high-pressure splashing, and covering the refractory material to form a trunnion protection layer. According to the converter slag splashing protection principle, during converter protection, a refractory material and a certain amount of asphalt mixture are splashed to the position of a converter trunnion through high-pressure nitrogen, the refractory material adheres to a converter lining under the conditions that tapping is just completed and the temperature of the converter lining is high, and then nitrogen is turned off and turned on back and forth, so that the converter is protected. The refractory material