Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
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1. THE USE OF ALUMINA-CHROME REFRACTORIES
IN THE HIGH WEAR
AREAS OF ANODE REFINING VESSELS
A. J. Rigby
Harbison Walker Refractories,
Cherrington Corporate Center,
400 Fairway Drive
Moon Township, Pittsburgh, PA U.S.A.
10. ALUMINA-CHROMIA REFRACTORY
• AREAS OF SEVERE WEAR IN CONVERTER AND
ANODE VESSELS GENERALLY DUE TO
PENETRATION AND SPALLING OF ALTERED
BRICK
• IMPROVEMENTS IN REFRACTORY LIFE WILL BE
DICTATED BY REDUCING OR ELIMINATING
THIS PENETRATION
• LABORATORY TESTING CANNOT REPLICATE
THESE WEAR MECHANISMS
11. ANODE REFINING VESSEL REFRACTORY ISSUES
• WEAR AREAS AT THE TUYERES, SKIMMING
MOUTH AND TAPHOLE
• TYPICALLY NEED MAINTENANCE EVERY 3-4
MONTHS
• SPECIFICALLY FOR THREE VESSELS DOWNTIME
TO REPAIR REQUIRES 8-9 WEEKS OF LOST
PRODUCTION (IF THERE IS NO SPARE VESSEL)
23. REPLACEMENT OF REBONDED FUSED GRAIN
MAGNESIA-CHROME BRICK BY ALUMINA-CHROME
GAVE UP TO 250% PERFORMANCE INCREASE
INCREASED PRODUCTION IN THE PLANT OF
~16,000MT OF ANODE COPPER
EVIDENCE THAT HIGHER CHROMIC OXIDE LINING
WILL FURTHER IMPROVE LINING LIFE
NO EVIDENCE OF ANY INCREASE DEVELOPMENT
OF SOLUBLE CHROME DURING USE IN
COMPARISON TO MAGNESIA-CHROME
24. CONCLUSIONS
MOST SEVERE AREAS OF WEAR IN ANODE REFINING
VESSELS WILL BENEFIT BY 2-2.5 TIMES IMPROVEMENT
USING ALUMINA-CHROME REFRACTORY
REDUCED DOWNTIME CAN ALLOW FOR SIGNIFICANT
PRODUCTION INCREASE
ALUMINA-CHROME NOW IN USE IN SLAGLINE OF
SECONDARY RECYCLING FURNACES AND SHAFT
SPENT ANODE REMELTING FURNACES.