关键词: 高温发泡;隔热耐火;轻质

Abstract: A new kind of insulating firebrick was fabricated, with high-alumina fly ash as the main raw material and high-carbon ferrochrome slag as the auxiliary raw material, by a high-temperature foaming method.The effects of the amount of sintering aids, the mix proportions of auxiliary raw materials and the type and amount of foaming agent on the performance of the insulating firebrick were systematically studied.Results show that the bulk density, compression strength and the heating permanent line change at 1250 ℃ of the insulating firebrick are ≤500 kg·m-3, ≥ 6 MPa and ≤2％, respectively.Thus, it proves to be a kind of light-weight, high-strength and low-thermal-conductivity fireproofing material.

Key words: high-temperature foaming;insulating firebrick;light-weight