Process for the mechanical treatment of aged slag and its use for the production of secondary building materials

摘要

The invention relates to a process for the production of secondary building materials by the mechanical processing of aged slag from waste incineration plants, the slag being given up as building rubble and this mixture being fed to an overbelt magnet through which coarse Fe scrap is endured, the mixture then being cut with a screen cut of 70 mm is classified dry, the material 70 mm of the mixture is classified dry after a further magnetic separation up to 32 mm, whereby coarse grain 32 mm is broken up with a slow-running impact crusher and fed to the above-mentioned magnet, and dry material 32 mm a 2 mm Sieve is added, water being sprayed onto the material of the sieve with 5-8 bar from high-pressure nozzles, the sieve passage 2 mm is fed to a float separator, the material is split into two grain classes in a two-stage upflow classifier, and the sieve passage 2-32 mm in a 2-wave n Sword washer is attracted and at the same time water from high pressure nozzles is applied.