| 摘要 |
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 |
