The technology developed in the Gintsvetmet Institute for treating battery scrap and other lead- leadcontaining wastes on the basis of electrothermal smelling permits production of secondary lead containing with minimum amounts of slag generated (by 3 to 5 times less than in case of conventional tech- technologies) and a reduction in the process gas volumes by 2 to 3 times. The proposed technology nologies) permits to minimize the cost of off-gas treatment due to smaller volumes as well. Electric smelting slags contain after in-furnace cleaning about 1.0% to 1.7% of lead in insoluble com- compounds. Such slags are rated as Class IV of toxic substances and are acceptable for utilization, pounds. E.g., in road construction. It should be noted that when treating spent batteries, mechanized dismantling and separation of individual battery components into separate fractions minimizes the content of slag-forming constituents in the charge fed to electric smelting. In combination with the use of a low-ash reductant (coke fines) this makes it possible to operate the unit for an extended period of time without replacing the slag layer in the electric furnace. In practice, the excess of slag is discharged from a full-scale electric furnace once every 10 to 15 days.
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