Defoaming system in reverse flotation process of phosphorite

The defoaming system in the phosphorite reverse flotation process comprises a flotation tank and a foam tank arranged at the rear end of the flotation tank, a scraping plate is arranged at the top of the flotation tank, a plurality of groups of defoaming water pipes are distributed in the foam tank, and each group of defoaming water pipes is provided with a plurality of layers of water outlet pipes; a spraying assembly is arranged at the top of the foam tank and comprises a pressure pump, a spraying pipeline and a plurality of nozzles, and the spraying pipeline is connected with a defoaming agent storage tank. The device can effectively control stable flowing of foam in the foam tank, when the foam in the foam tank overflows, a defoaming agent can be quantitatively added in time, stable flowing of the foam in the foam tank is ensured, the dosage of the defoaming agent in the fine-fraction phosphorite dealumination process can be reduced, scavenging indexes can be optimized, the grade of tailings can be reduce