| 摘要 |
PROBLEM TO BE SOLVED: To provide a pulverized coal injection rotary lance which can be rotated by hand when a tip of a lance tube is distorted while a blast furnace is in operation.SOLUTION: A guide tube 10 inserted/fixed in advance in/to a pulverized matter injection port R is provided. A connection tube body 20 which is joined to the opening end of the guide tube 10 in a freely attachable and detachable manner is provided. A rotary joint 30 fit and held rotatably in the inside of the connection tube body 20 is provided. A lance tube 40 made of stainless steel is fixed to the tip of the rotary joint 30. A feed pipe 50 is fixed to the rear end. A fix nut 60 screwed to a lateral surface of the connection tube body 20 and fixing the rotary joint 30 to the connection tube body 20 is provided. The fix nut 60 is loosened when the lance tube 40 rotates, so that the lance tube 40 rotates together with the rotary joint 30. |
