Sintering together foundry sand waste material and limestone - comprises mixing and sintering at 1400-1500 deg. C

摘要

Foundry sand residue which has slight or no hydraulic properties is mixed with limestone and dried and ground together before being sintered at 1400-1500 deg C. The ratio of sand to limestone, is the Cao is the sand and CaCo, is the limestone, is such that the sintered product has a CaO content of 63-68%. USE/ADVANTAGE: Making portland cement clinker for cement production. Uses sound residue which would normally be dumped in a land fill.