Lead-recovery process
OwnerOdillo Piottoinventor
Life of this patent
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Abstract
A process for recovery lead including providing lead-bearing material. The lead-bearing material includes lead sulfate (PbSO4). The lead-bearing material is heated resulting in the formation of gaseous sulfur compounds and lead oxide. The gaseous sulfur compounds and the lead oxide are separated. The lead oxide is lanced with a hydrocarbon resulting in the formation of lead (Pb) and carbon dioxide (CO2). The lead and the carbon dioxide are separated.
Claims31
A process for producing metallic lead from scrap lead-acid batteries, the process comprising:
- processing scrap lead-acid batteries to separate lead-bearing material from non-lead bearing material;
- removing sulfur present in the lead-bearing-material to produce a desulfurized lead-bearing material;
- and,
- introducing a gaseous hydrocarbon to the desulfurized lead-bearing material to produce metallic lead.
A process for producing metallic lead, the process comprising:
- providing a desulfurized lead-bearing material;
- and,
- introducing a gaseous hydrocarbon to the desulfurized lead-bearing material to produce metallic lead.
A system for processing a lead-bearing material to produce lead, the system comprising:
- a furnace for heating the lead-bearing material at a temperature and time sufficient to remove sulfur present in the lead-bearing material;
- a separation system for separating any gaseous sulfur compounds produced by heating the lead-bearing material;
- and,
- a source of a gaseous hydrocarbon connected to the furnace and constructed and arranged to introduce the gaseous hydrocarbon to the desulfurized lead-bearing material in an amount and for a period of time sufficient to produce metallic lead.
A process for retrofitting a smelting system, the process comprising:
- providing a lance in connection with a source of a gaseous hydrocarbon;
- and,
- positioning the lance in connection with the source of gaseous hydrocarbon with a furnace of the smelting system.
A process for the recovery of lead, the process comprising:
- providing lead-bearing material, the lead-bearing material comprising PbSO4;
- heating the lead-bearing material to produce gaseous sulfur compounds and lead oxide;
- separating the gaseous sulfur compounds and the lead oxide;
- lancing the lead oxide with a gaseous hydrocarbon resulting in the formation of lead (Pb) and carbon dioxide (CO2);
- and
- separating the lead and the carbon dioxide.
Dependencies are inferred from the claim text.