The recipe will not be disclosed. A frother refers to a surfactant that can reduce the surface tension of water to form foam, so that the bubbles in the aerated flotation slurry can adhere to the selectively floating mineral particles. The foaming agent formula of the coal washing plant will not be disclosed to the public. The foaming agent is mixed with a variety of surfactants and special foam stabilizers. After taking into account the effects of washing, softening and eliminating static electricity, it can meet the needs of low liquid supply in the finishing process. Foam meets various technical requirements and can make wet fabrics greatly reduce the overall processing cost. It is widely used in cotton, denim finishing, printing and carpet dyeing.