Silicon-manganese alloy smelting furnace

The utility model relates to the technical field of accessory devices of smelting furnaces, in particular to a silicon-manganese alloy smelting furnace which can give an alarm after a gas collection tank assembly is filled with waste gas, so that the difficulty that a worker finds that the gas collection tank assembly is filled with waste gas and replaces the gas collection tank assembly at the first time is reduced; therefore, the probability of unsmooth exhaust emission of the smelting furnace is reduced, and meanwhile, the failure rate of a fan exhaust assembly is reduced; the smelting furnace comprises a smelting furnace body and a first gas collection tank assembly, and two feeding assemblies are arranged at the top end of the smelting furnace body; the device further comprises a control box, a limiter, a power piston assembly, a telescopic rod, a limiting spring, an audible and visual alarm assembly, an adjusting rod, a positioning plate, a fastening threaded rod, a proximity switch assembly, an adjusti