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Laundry detergent is a household detergent. The production facilities of laundry detergent are generally complex, and its process is also complex. Large-scale laundry powder production line has large investment, large area and large staff requirements. The washing powder production line has high tower spray method and agglomeration molding method. Simple production of laundry powder is very simple. Its main equipment is horizontal mixer, i. e. screw mixer. The raw materials needed for washing powder are added into horizontal mixer, sprayed with sodium sulfonate, mixed and stirred, and then added flavors and other auxiliary materials to complete production. The production method is simple and feasible for small enterprises, with less investment, less land occupation and less personnel.