This paper describes the commercial-scale test on treatment of cadmium-bearing materials by single column to produce crude cadmium at one go, where by using Type 1372 large lead column for treating materials with 40%~90%Cd, it is possible to enrich cadmium to about 98% and enable content of lead, zinc and other high-boiling impurity metal in the crude cadmium to comply with the specification.

Determination of Cadmium in Lead Ingot by the Flame Atomic Absorption Spectrophotometric Method;

Based on the variability of rock property,material gradation and water content of rock slag mixture,several tests are carried out to study compaction,indoor bearing-ratio(CBR),expansion,crash in water and rebound modulus of rock slag mixture with different gradations and coarse material content.