Magnesium alloy sand casting's environment -friendly device

The utility model relates to a magnesium alloy sand casting's environment -friendly device, including magnesium alloy casting molding sand, gas collecting channel gentleness bulk absorption reaction box, open side down and be located magnesium alloy casting molding sand directly over for the gas collecting channel, and gas collecting channel top center is connected with gas collecting channel the pipe connection, the gaseous reaction box that absorbs has held aqueous sodium hydroxide for enclosed construction and lower part, and the gaseous middle part lateral wall that absorbs the reaction box is connected with the reaction box intake pipe, and the interior end submergence of reaction box intake pipe is below the liquid level, and the reaction box intake pipe is passed through the blast pipe and is connected with gas collecting channel the pipe connection, is equipped with the air exhauster above the gaseous top cap that absorbs the reaction box, and the suction inlet of air exhauster is continuous with the gaseous phase space top of gas absorption reaction box. The middle part of gaseous phase space direction of height is equipped with the alkaline cotton filtering layer that soaked with aqueous sodium hydroxide, and alkaline cotton filtering layer is covered with the cross section in whole gaseous phase space. The device can greatly reduced magnesium alloy casting in -process gas contaminant discharge.