The present study aims to response surface methodology (RSM) for predicting magnetizing properties of the matrix's elements of the magnetic filter that are constructed from the bi-mixture of the magnetic balls of various sizes, employed in the cleaning of the disperse mixture of water, and corrosion particles (rust) of low concentrations. Based on a three-level central composite design (CCRD) involving the variables H external magnetic field strength (139.55-314.45 kA/m) x 1 , L filter length (0.01-0.10) x 2 and E porosity fraction factor (0.44-0.54) x 3 , a RSM for B-H relation of the matrix of the magnetic filter. In this study, a CCRD was created with 20 runs, 8 cube points, 4 center points per cube, 6 axial points, 2 center points per axial, and =1.68. Data obtained from RSM on B-H relation of the matrix of the magnetic filter were subjected to the analysis of variance and analyzed using a second-order polynomial equation, which resulted in the optimized process conditions of 407 kA/m as external magnetic field strength, filter length of 0.02m and the porosity fraction factor of 0.67. Maximum magnetic intensity (B=0.85 Tesla [T]) was obtained at the optimized conditions in the matrix of the magnetic filter.