An operation method of a flash smelting furnace includes blowing a gas for dispersing raw material and contributing to a reaction, from a lance at an upper portion of a shaft so that the gas forms a spiral flow. The connector shaft has a couple of identical fastening means at both ends thereof. The sensor provides an image signal. The OE signals are outputted to a gate driver for generating a plurality of scan signals of the corresponding regions. The test signal is then sent back to the information processing system for comparison via another information transmission interface. In some embodiments, the segregated circuits can be \u201cstacked\u201d in series such that power is more efficiently used.