Patent ID: 9435005
Filing Date: 2016-09-06
CPC Classification: C04B,C22B,Y02P

Claim Text:
1. A method for processing slag containing iron and non-ferrous metals, the method comprising the steps of: feeding the slag into a reduction furnace; reducing the slag in the reduction furnace by means of a reducing agent to convert at least some of the non-ferrous metals to metallic form, where reduction occurs at least until 5 mass-% of the iron has reduced into metal and at least some of the non-ferrous metals has vaporized; mixing the contents of the reduction furnace during reduction to prevent settling of metal droplets from the slag; tapping a molten slag-metal mixture generated in the reduction furnace; cooling, crushing and grinding the slag-metal mixture; processing the slag-metal mixture to separate a metal fraction from a remaining clean slag, where the remaining clean slag is suitable as raw material in a useful process.