Glass-making-quality granulated slag process

A process for forming granulated slag, the process comprising:

• collecting a molten slag flow directly from a blast furnace in a temperature range between 2500° F. and 2600° F.;
• quenching the molten slag flow with a flowing spray of water while the molten slag flow is still in the temperature range between 2500° F. and 2600° F. to create a granulated slag flow such that ferrous materials and non-ferrous metallic materials solidify joined together in the granulated slag flow, wherein the flowing spray of water comprises a water flow ten times the volume of the molten slag flow;
• drying the granulated slag flow;
• magnetically separating the solidified joined ferrous materials and non-ferrous metallic materials from the granulated slag with a rare earth drum magnet;
• and
• vibrating the granulated slag flow over size separating screens to separate the granulated slag flow, the vibrating comprising separating out slag particles smaller than 140 mesh and larger than 24 mesh.