为适应高炉强化冶炼、提高热风温度的需要,河南省密县第三耐火材料厂在洛阳耐火材料研究院、济源钢铁厂等单位的配合下,在原五孔格子砖基础上,经过反复实验,不断改进工艺,试制成功了繁体水平通道五孔格子砖,经过四年来的生产实践证明,其使用效果良好,赢得了用户的普遍赞许,于1988年6月通过了省级鉴定。 In order to meet the blast furnace to strengthen smelting, increase the need for hot air temperature, the third refractory plant in Henan Province Luoyang Refractory Research Institute, Jiyuan Iron and Steel Factory and other units with the original five-hole grid on the basis of brick, after repeated experiments, continuous Improve the technology, trial success of the traditional horizontal channel five holes lattice brick, after four years of production practice has proved its good effect, has won the user’s universal praise, in June 1988 passed the provincial appraisal.