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1. 发明专利

JPH07303869A METHOD OF CLEANING LONG LENGTH BODY 失效
公开(公告)号：JPH07303869A
公开(公告)日：1995-11-21
申请号：JP30668094
申请日：1994-12-09
申请人： AIR LIQUIDE AMERICAN
发明人： MARUKU JII ROBEERU
IPC分类号： B08B7/04 , B08B7/00 , B08B11/00
摘要： PURPOSE: To clean elongated objects having contaminated surfaces while averting environmental pollution by exposing the elongated objects having the contaminated surfaces to a gaseous, liquid and/or solid inert gas to embrittle the contaminants, then drawing out the elongated objects through an orifice and removing the embrittled surface contaminants. CONSTITUTION: The elongated objects 11 the surfaces of which are contaminated by the contaminants including organic or inorganic substances containing oxides, filth, lubricants, lime, carbon-containing and graphite substances are exposed to the gaseous, liquid and/or solid inert gas of the amount suitable for embrittling the contaminants in a chamber 10. The elongated objects 11 are thereafter drawn out through the orifice 17 of a die 16 to remove the embrittled surface contaminants from the elongated objects 11. The inert gas is selected from the group consisting of liquid nitrogen, liquid argon and solid carbon dioxide. After the contaminants are removed, the elongated objects 11 are subjected to annealing in an inert atmosphere. This orifice 17 has a cross section substantially the same as the cross section of the elongated objects 11.

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