Table 2   Zhangjiakou gold mine CIP plant process indicators [302]

CIL system

Cyanide grade

Tail slag grade

Tail grade

Tail cyanide content

Leach rate

Adsorption rate

2.5g/t

0.2g/t

0.03g/m 3

200g/m 3

92%

97.50%

Desorption electrowinning system

Gold charcoal grade

Desorption charcoal grade

Electrolytic poor liquid grade

Desorption rate

Electric rate

 

2000~3500g/t

50g/t

6g/m 3

99.80%

99.90%

 

Note: The indicators in the table do not include the recovery rate of mercury .

Table 3   Main material consumption of Zhangjiakou Gold Pulp Mill [302]

lime

Sodium cyanide

Activated carbon

Liquid chlorine

Nitric acid

Sodium hydroxide

water

Electricity

10kg/t

0.7~0.8kg/t

0.05kg/t

1.86kg/t

0.038kg/t

0.2kg/t

3.15t/t

33.5k W· ht

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