Abstract: Based on the ignition energy of the converter gas， the safety of waste heat recovery from converter gas at middle and low temperature in the honeycomb regenerator is analyzed. A physical model of the channel in the honeycomb regenerator is established. Potential total energy of multi-particle phase in the honeycomb regenerator is calculated by using JKR collision theory and the theory of tribology. Based on the minimum ignition energy(MIE) of converter gas through the MIE experiment platform at room temperature， the experimental correction calculation formula of MIE is revised and the modified coefficient is 0.909.The MIE in three kinds of converter gas at the ignition temperature of 973K is 7.36×10^-7，6.26×10^-7 and 6.01×10^-7J， respectively. Compared with the potential ignition energy， the results show that it is safe and feasible to recover the waste heat from the converter gas at medium-low temperature in the honeycomb regenerator when the bore diameter is smaller than 6mm.

Key words: converter gas, ignition energy, honeycomb heat regenerator, collision theory, friction theory