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<br />ii <br />I~ <br />IL <br />i~ <br />BECTION 3.0 <br /> <br />PROCEBB DATA <br />Tailings pH Adjustment System <br />Slurry flow rate <br />Slurry solids concentration <br />Particle size - dao <br />Solids S.G. <br />NaCN in solution in feed slurry <br />NaCN in solution in treated slurry: <br />- actual <br />- design basis <br />NaCN converted to HCN <br />HCN evolved <br />No. of stages (tanks) <br />Retention time <br />Tank capacity (working) <br />Tank dimensions* <br />1'Y <br />1,148 g m D~`' d d.s•~~'' <br />49.5$ w~ E~c.• Y,,;c <br />100 µm V~o"' <br />2.68 <br />„1~ <br />80 mg/1 u ~ ~ ~ .~ ~ ~ , r.~ <br />, rd <br />unknown •; . <br />10 mg/ 1 " i <br />29.5 lb h ~ " 'M~~ 1•~•+ <br />16.2 lb~h , ,,, ~ ~„ <br />• r. ;r .' <br />„~ ~ <br />one "' <br />15 min fir' • <br />16,900 cal <br />15' din. x <br />20' high <br />Acid addition rate (continuous) <br />Acid concentration <br />Initial pH <br />Final pH <br />Air sparge rate <br />Exhaust gas flow <br />Absorber liquor <br />Bleed from absorber <br />l <br />I <br />r pj/1474rp 012591 <br /> <br />Make-up solution <br />Scrubber operating pH - (max) <br />- (min) <br />0.27 gp <br />1.2 lb/ <br />93$ HZSO4 <br />11.1 <br />8.5 - 8.~9 <br />2,000 s fm <br />2,750 s fm <br />NaOH sol tion <br />as required <br />50~ NaOF~ <br />11.5 <br />10.5 <br />*Note: Tank dimensions include allowance for 20$ expansion of <br />slurry volume to accommodate air holdup. <br />3-1 <br />