Waste gas extraction device for steel casting machining

The utility model discloses a waste gas extraction device for steel casting processing, which comprises an extraction device main body, a watering and dust removing mechanism is fixedly mounted on theouter surface of the upper end of the extraction device main body, a sucking pump is fixedly mounted on the outer surface of one side of the extraction device main body, and a sucking pipe is arranged on the outer surface of one side of the sucking pump. An air exhaust cover is fixedly installed on the outer surface of one end of the air exhaust pipe, and a conveying pipe is fixedly installed onthe outer surface of the other side of the extraction device body. The waste gas extraction device for steel casting machining is provided with the water spraying and dust removing mechanism and the purifying and filtering mechanism, can spray water to extracted waste gas, effectively removes dust in the waste gas, facilitates later treatment, is convenient to use, can filter and purify the wastegas, removes harmful substa