Experimental study on the control of black smoke pollution from the ceramic kilns based on the mechanism of the surfactant and coagulant

Aiming at the characteristics of carbon black,a new method of controlling the black smoke from the industrial coal-burning ceramic kilns by wetting was brought forward.The carbon black in the flue of coal-burning ceramic kiln was collected for the experiments,and its physical and chemical properties were studied in detail.In order to change the sedimentation and wettabil-ity state of the carbon black,the complex solution of the coagulant and surfactant was applied.After a series of orthogonal experiments,the complex solutions with bet-ter effects were chosen.Then,the sedimentation percent-age of carbon black treated by the selected complex solutions was measured.The optimized complex solutions included Na 2 SO 4(100 mmol/L),sodium dodecylbenzene-sulfonate(SDBS)(1.2 mmol/L)and polyacrylamide(PAM)(40 mg/L).After carbon black was absorbed,the complex solutions were clear and colorless.The complex solutions can be recycled,and the sedimentation percent-age of carbon black is 94%.