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Approximately 25
mm of tungsten carbide on a Gray Cast Iron shell.
A.R.M* has patents granted in
various countries on this. |
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A.R.M*
hardfaced top roll in No 1 mill at Rocky Point top roll after 300,000
tonnes - no maintenance required.
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A.R.M* No 2 mill
top roll after 1.6 million tonnes at Tully mill in 1999.
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The
first trial A.R.M*
roll South. Johnstone 1.1 million tonnes.
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Close up of
A.R.M* section broken off after 1.93 million tonnes.
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Close
up of feed after 1.93 million tonnes.
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Compare rebuilt
undercut section of teeth profile to as worn. |
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Copy
of No 2 mill top roll - 7ft 6 long x 1.5 inch pitch - after 1.6 million
tonnes - which was the entire season.
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End section
Tully top roll after 1.93 million tonnes. |
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Feed
roll after 1.93 million tonnes.
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Feed roll at 1.7
million tonnes. |
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First
trial at South Johnstone at 1.0 million tonnes.
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Left image is No 2 mill
and right image is No 4 top roll after 1.6 million tonnes at Tully mill in 1999 -
note no undercut on No 4 top roll. |
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New
A.R.M* roll.
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No 4 mill top
roll - 7 ft long x 1.5 inch pitch - which also has some chromium saced on
the side of the teeth. |
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Overview
of the No 2 mill top roll used at Tully Mill - still griping fine after 1.6
million tonnes crushed.
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Rebuilt undercut.
Additional tungsten not required for grip - expected to last another 2.0
million tonnes. |
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Rebuilt
undercut wear on side of teeth of the feed roll after 1.93 million tonnes.
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Rocky
Point mill standard hardfacing lasts only two weeks compared to A.R.M*
hardfacing which will last over 3 years.
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Standard Tully
top roll No.4 mill at 1.0 million tonnes. |
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Teeth
profile of the A.R.M* hardfaced mill roll to be used at Rocky Point mill
starting the 2000 crushing.
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Top & feed
rolls at Tully after 1 million tonnes. |
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Top
6ft roll, No 1 mill, Rocky Point mill - used during 2000
crushing season.
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Top roll 1.93
showing undercut. |
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Top
roll at 1.7 milion tonnes.
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Top roll at 1.7
million tonnes. |
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Tully
top roll 1 million tonnes ruler.
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Tully top roll
after 1 million tonnes - 1998 season. |
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Vertical
8 foot mill roll at Tully to rebuild teeth.
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