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AssigneeJiangsu New Chunxing Resource Recycling Co. Ltd
InventorChunming YANG
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An agent for selective antimony and arsenic removal and tin retaining includes 10-30 wt % of aluminum, 65-85 wt % of calcium, 1-10 wt % of coke powder, and 1-5 wt % of lead powder. According to the content of antimony in lead, the antimony and arsenic removal and tin retaining agent is added to a molten lead which is at a temperature of about 550-650° C. at a certain proportion so as to carry out an antimony and arsenic removal reaction; after the reaction is completed, cooling is carried out, and antimony and arsenic scum is fished out to obtain a molten lead with antimony and arsenic removed; the content of antimony and arsenic is reduced to 0.0005 wt % or less, and the content of tin is substantially unchanged. The production costs for lead alloy preparation are reduced, and no smoke and odor appear in an antimony and arsenic removal reaction process.
A selective antimony and arsenic removal and tin retaining agent for refining secondary crude lead, wherein the selective antimony and arsenic removal and tin retaining agent consists of 10-30 wt % of aluminum, 65-85 wt % of calcium, 1-10 wt % of coke powder, and 1-2 wt % of lead powder, based on a total mass of the antimony and arsenic removal and tin retaining agent of 100, wherein the calcium, the aluminum, the coke powder, and the lead powder are thoroughly mixed at the mass percentage to produce the selective antimony and arsenic removal and tin retaining agent.
Dependencies are inferred from the claim text.