Blast head for loosening or removing scale on a metal surface
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United States of America Patent
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Mar 10, 2009
Grant Date -
Jun 23, 2005
app pub date -
Feb 14, 2005
filing date -
Feb 14, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for the descaling of metal surfaces without the use of caustic substances is provided. The apparatus includes a first and second blast heads containing nozzles that spray high velocity jets of media at a scale covered continuous sheet of steel. The continuous sheet of steel is advanced into an abrading station containing a pair of brush assemblies that include stainless steel bristled brushes. The stainless steel brushes engage the surface of the sheet of steel and abrade away the cracked scale, leaving a surface clean of scale. The surface produced is pH neutral and therefore resists additional corrosion and does not require oil coatings, or other protective treatments. Eliminating these steps makes for a faster, more robust process and saves considerable cost.
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