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This paper is to study the effect of CaCO 3 precipitated crystal scale mixed with different particles on the scaling characteristics under the action of electromagnetic field. The simulation of industrial field experiments, based on the electromagnetic water treatment dynamic experimental bench, change the type of particles, concentration, magnetic field strength, according to the experimental results of the thermal resistance and scale inhibition rate curve under different working conditions, through the scanning electron microscope microscopy analysis of the fouling samples, to study the effect of CaCO 3 fouling mixed with different particles in the role of the magnetic field on the effect of the law on the deposition characteristics. The results show that: electromagnetic field on MgO particles dirt and CaCO 3 dirt deposition have inhibition effect; CaCO 3 and different concentrations of CaCO 3 crystalline particles mixed, CaCO 3 particles, the more the electromagnetic field on the formation of CaCO 3 precipitation scale inhibition effect is not obvious; CaCO 3 precipitation scale and MgO particles mixed in the magnetic field can significantly enhance the effect of the field of the inhibition of the scale, magnetic field Under the action of the magnetic field, as the content of MgO particles increases, the scale inhibition effect on the dirt is first enhanced and then weakened until it tends to be about 0. Scanning electron microscopy analyses showed that the morphology and degree of aggregation of calcium carbonate fouling crystals were influenced by MgO particles under the action of electromagnetic fields, and CaCO 3 fouling was transformed from regular ortho-hexahedra to acicular aragonite and amorphous CaCO 3 , which made the stripping phenomenon more significant. Comprehensive experimental results and scanning electron microscopy analyses of fouling samples show that the mixture of CaCO 3 solution with a small amount of MgO particles can be an effective means to inhibit the precipitation of crystalline fouling under the environment of alternating electromagnetic field. This study provides theoretical guidance for the application of alternating magnetic field in the future, and provides new ideas and methods for solving the problem of crystalline fouling in industry. • This paper is to study the effect of CaCO 3 precipitated crystalline scale mixed with different particles on the scaling characteristics under the action of electromagnetic field. • Electromagnetic fields have an inhibitory effect on the deposition of both MgO particulate fouling and CaCO 3 fouling. • Under the mixing of CaCO 3 with different concentrations of CaCO 3 crystalline particles, the more CaCO 3 particles the less obvious the inhibition effect of electromagnetic field on CaCO 3 precipitation scale formation. • With the increase of the content of MgO particles, the scale inhibition effect on the dirt is first enhanced and then weakened until it tends to be about 0. • Under the alternating electromagnetic field environment, CaCO 3 solution mixed with a small amount of MgO particles can be an effective means to inhibit the precipitation crystal fouling. [ABSTRACT FROM AUTHOR]