Process of preventing as elution from copper slag

Details Process of preventing as elution from copper slag Process of preventing as elution from copper slag

2011-08-16

2011-08-16

Wyszomierski, George (Department: 1733)

Specialized metallurgical processes, compositions for use therei

Processes

Producing or purifying free metal powder or producing or...

C075S710000, C065S019000

Reexamination Certificate

active

07998240

ABSTRACT:
A process of water-granulating copper smelting slag can readily suppress elution of As from the copper smelting slag. A process of water-granulating a copper smelting slag with granulation water in a circulating system, includes granulating the copper smelting slag with the granulation water; settling suspended solids from the granulation water circulating in the system in a settling tank followed by discharging part of the granulation water through the settling tank from the system; and feeding supplementary water having a concentration of As of 0.01 mg/L or less into the system in such an amount that the total amount of the granulation water circulating in the system is kept constant; wherein the amount of granulation water discharged through the settling tank is such that As eluted from the copper smelting slag after water granulation is 0.01 mg/L or less.

REFERENCES:
patent: 6000242 (1999-12-01), George et al.
patent: 8-301636 (1996-11-01), None
patent: 2005-139027 (2005-06-01), None
patent: 2005-289697 (2005-10-01), None
patent: 2005289697 (2005-10-01), None
patent: 2006-327909 (2006-12-01), None
Machine translation of JP 2005-289697 published Oct. 20, 2005.
Japanese Office Action issued Mar. 2, 2010 in Japan Application No. 2008-057917.
English Language translation of the Official Action dated Dec. 14, 2010 for Japanese Application No. 2008-057917.

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