Recovery of Chromite and Silica from Steel Foundry Waste Molding Sands.

摘要

The report describes a method which was developed for recovery of chromite and silica from steel foundry waste molding sands. The research shows a simple scrubbing followed by an oxidation roast can be used to produce a quality sand for reuse. If sands contain chromite, a high-intensity dry magnetic separator can be used to separate this valuable material from silica after the cleaning treatment. A cost estimate of the method is included in the appendix of the report. (Author)