... with low iron content, low porosity and low creep rate, mullite bricks, Sillimanite brick, re-sintered AZS, zirconirm Ramming Mixes, etc. ItemLow ... fireclay brickBricks (low iron, low porosity and low creep rate)Mullite bricksSillimanite brickRe-sintered AZSM-70M-80AL2 O3, %, ≥424570806048ZrO2, %, ≥-----32SiC, %, ≤38 ...