System and method for recovery of valuable constituents from steel-making slag fines
AssigneeFritz Enterprises, Inc.
InventorsRaymond C. Fritz, Raymond J. Fritz
Life of this patent
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Abstract
A system and method directed to the economical recovery of valuable iron constituents from iron blast furnace and steel-making slag fines wherein the slag is obtained and subjected to a series of classification steps which progressively sort the slag fines by various physical characteristics, including magnetism, size, and density, into relatively iron-rich and relatively iron-poor classifications, resulting in the isolation of iron-rich commercial byproduct at one or more of the classification steps.
Claims3
A system for recovering relatively iron-rich material from slag fines, the system including:
- a magnetic classifying station for receiving a first batch of material and separating the particles in the first batch into magnetic and non-magnetic groups;
- a first size classifying station for receiving a second batch including the nonmagnetic group, and separating the particles in the second batch into a group of particles of size greater than or equal to about 10 mm and a group of particles of size less than about 10 mm;
- a milling station for receiving a third batch including the group of particles of size less than about 10 mm and milling the particles in the third batch;
- a second size classifying station for receiving the third batch and separating the particles in the third batch into a group of particles of size greater than or equal to about 1 mm and a group of particles of size less than about 1 mm;
- and
- a hydraulic fluidized bed density separator for receiving a fourth batch including the group of particles of size less than about 1 mm and separating the particles in the fourth batch into a group of particles having a density in the range of about 5.0-6.0 g/cm3 and a group of particles having a density in the range of about 2.3-2.7 g/cm3.
A system for recovering relatively iron-rich material from slag fines, the system including:
- a magnetic classifying station for receiving a first batch of material having iron content and separating the particles in the first batch into magnetic and non-magnetic groups;
- a first size classifying station for receiving a second batch including the nonmagnetic group, and separating the particles in the second batch into a group of particles of size greater than or equal to about 10 mm and a group of particles of size less than about 10 mm;
- a crushing station for receiving a third batch including the group of particles of size less than about 10 mm and crushing the particles in the third batch;
- a second size classifying station for receiving the third batch and separating the particles in the third batch into a group of particles of size greater than or equal to about 1 mm and a group of particles of size less than about 1 mm;
- and
- a hydraulic fluidized bed density separator for receiving a fourth batch including the group of particles of size less than about 1 mm and separating the particles in the fourth batch into a group of particles having a density in the range of about 5.0-6.0 g/cm3 and a group of particles having a density in the range of about 2.3-2.7 g/cm3.
Dependencies are inferred from the claim text.