Nickel containing impurities such as requirements: lead is less than or equal to 0.1%, less than 0.1% of zinc, arsenic is less than or equal to 0.1%, Magnesium Oxide plus alumina is less than or equal to 10%, no other harmful and mechanical inclusions. Lead, zinc, arsenic grade more than 0.1% starting from the super 0.1%, each charge 50 yuan / ton of dry, Magnesium Oxide plus alumina more than 10% starting from the super 1%, each charge 25 yuan / dry ton.
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