Renn-Walz process

Renn-Walz process

[′ren ′välts ‚prä·səs]
(metallurgy)
A method of reclaiming iron and other metals from the waste materials produced in the smelting of zinc and lead ores; this material is brought up to 1000°C in the preheating zone of the kiln by the countercurrent gases, and the oxidized metal vapors are carried off in the flue gases, from which they are subsequently filtered.