METHOD AND ARRANGEMENT FOR REDUCING AUTOFLASH AND SLURRY CARRYOVER IN AUTOCLAVE FLASH SYSTEMS
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United States of America Patent
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Dec 24, 2015
app pub date -
Feb 7, 2014
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Feb 8, 2013
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The present invention relates to a method and an arrangement for pressure and temperature let down of autoclave discharge slurry, in particular in pressure oxidation or high pressure acid leach of metal containing ore. The method of the invention comprises a step of precooling the autoclave discharge slurry by contacting the autoclave discharge slurry with a cooling fluid for reducing the temperature of the autoclave discharge slurry prior to its entry into the first flash stage. The invention further relates to an autoclave (1) and pressure let-down arrangement adapted for providing cooling fluid to the autoclave discharge slurry prior its entry into the first flash vessel (2).
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