... degree Al2O3: 37-77% size: 230x114x65/75mm ZIBO JUNXU TECHNOLOGY CO,LTD is the professional manufacturer and exporter of refracotry and insulation ... , primarily export to SPAIN, USA, ITALY, TURKEY,AFRICA etc.JM insulating brick, using high pure mullite as raw material, is ... to different type and then sintering in high temperature. JM insulating brick is the new energy saving material for insulation ...