High speed centrifugal blowers are key equipment in sulfuric acid production system with waste gases from zinc metallurgy.

Based on the situation of Zinc recovery rate and detail analysis of metal loss in process of Zinc metallurgy, several measures are put forword to improve the recovery rate in zhuzhou smelter.

The common methods of reclaiming indium from the byproducts of lead metallurgy and zinc hydrometallurgy are enumerated, and analyzed every method's virtue and shortcoming.