AGGLOMERATE STONE FOR USAGE IN SHAFT FURNACES, Corex FURNACES OR BLAST FURNACES; METHOD OF PREPARATION OF AGGLOMERATE STONES (VERSIONS) AND USING FINE ORE FOR PREPARATION OF AGGLOMERATE STONES Russian patent published in 2009 - IPC C22B1/243 

FIELD: metallurgy.

SUBSTANCE: agglomerate stone contains (in wt %) 6-15% of cement binding, up to 20% of carbon carrier, up to 20% of residual and return substances, selectively - up to 10% of accelerator of solidification and hardening and iron ore of stone form in shape of particles with grain less, than 3 mm; also agglomerate stone possesses early hardness of at least 5 H/mm² in 3 days, and cold compressive strength of at least 20 H/mm² in 28 days. Fine and super fine ore with grains up to 3 mm is used for preparation of agglomerate stone at production of iron. The method consists in mixing iron ore in form of thin or super thin dust with Portland cement or slag cement binding in form of hydraulic cement phase, also selectively in mixing with carbon carrier, residual or return substances and/or accelerator of solidification and hardening; mixture filled in moulds is compressed or is subject to shaking movement and is dried.

EFFECT: upgraded hardness of agglomerate stones and maintaining form even at high temperature.

19 cl, 3 dwg, 2 ex