| 摘要 |
PROBLEM TO BE SOLVED: To enable a blower blade to continue long-lifetime operation of four years and a half, as a conventional blower blade in a dust collecting blower device of molten iron pretreatment equipment needs to be cleaned every 3-5 days due to adhesion of sucked CaSO<SB>4</SB>, Ca(H<SB>2</SB>PO<SB>4</SB>)<SB>2</SB>, FeO, Fe<SB>2</SB>O<SB>3</SB>, CaC<SB>2</SB>, etc. SOLUTION: Super-hard powder is made on both end parts on the suction side and the discharge side of the blower blade which are the maximum abrasion part, and cast iron powder of Hi-Cr is made at an abrasion part on a rotational direction surface by a high-frequency overlaying brazing system, which makes the blade a non-crack abrasion blade. A Teflon plate is stuck on a reverse-rotational direction surface to prevent adhesion of collected dust powder. COPYRIGHT: (C)2010,JPO&INPIT |
