Abstract:A three-dimensional bottom-blowing smelting furnace mathematical model was established, and the gas phase distribution and momentum distribution of the molten pool were studied, which provides baseline and important parameters for the optimization of bottom-blowing furnace. The reforming scheme of bottom blowing furnace equipment in Yimen Copper Co., Ltd., and refinement of the field construction scheme were introduced. The bottom blowing furnace body is supported by three rollers, and the on-site cutting and lengthening transformation is carried out in the workshop. The construction space of the extended section of the bottom blowing furnace is narrow, the field reforming scheme is optimized, and the furnace body hoisting is carried out in the original factory building with special equipment fold crane. Finally, the on-site modification is completed in 41 days.