Title:
STRUCTURE OF PACKING MATERIAL FOR TAP HOLE
Document Type and Number:
Japanese Patent JPH09103870
Kind Code:
A
Abstract:
To provide the structure of a packing material increased in the oxygen-free porosity at the time of tapping by prevent molten metal penetration and oversintering.
This structure of the packing material for a tap hole is formed of the packing material which has a two-layered structure composed of a porous on bellow lower layer consisting of particles contg. ≥70wt.% Al2O3 and having 1.0 to 2.0mm grain size and an upper layer consisting of feldspar particles having 0.5 to 2.0mm grain size or a mixture composed of feldspar particles having 0.5 to 2.0mm grain size and silica particles having 0.5 to 2.0mm grain size and is charged into the tap hole of a vessel for molten metal.
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Inventors:
KUMEI TAKASHI
YASHIMA YUKIO
YAMAUCHI TAKASHI
YASHIMA YUKIO
YAMAUCHI TAKASHI
Application Number:
JP28803595A
Publication Date:
April 22, 1997
Filing Date:
October 09, 1995
Export Citation:
Assignee:
NISSHIN STEEL CO LTD
International Classes:
B22D41/46; C04B38/00; C04B41/85; (IPC1-7): B22D41/46; C04B38/00; C04B41/85
Attorney, Agent or Firm:
Wataru Ogura
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