Abstract: In order to prevent sulfide ore spontaneous combustion and improve the effect of the existing inhibitor, a kind of chemical foam inhibitor was put forward, which uses aluminum sulfate, sodium bicarbonate, ferric chloride and plant protein hydrolysate as raw materials. By using the method of four factors and three levels orthogonal experiment, the inhibitor was prepared. By measuring the frothing volume, viscosity, surface tension and the oxidation weight gain rate in 15 days under the condition of constant temperature and humidity, the foaming ability, wall adhesion, permeability, and the actual effect of the inhibitor were explored. The results show that the mass fractions of the aluminum sulfate, sodium bicarbonate, ferric chloride and plant protein hydrolysate are 8.6%, 4.3%, 0.35% and 0.26% respectively when the foaming performance is the best, that the mass fractions are 11.5%, 11.5%, 0.31% and 0.08% respectively when the permeability is optimal, and that the mass fractions are 8.0%, 12.0%, 0.16% and 0.16% respectively when the wall adhesion and inhibitor performance are optimal.

Key words: chemical foam inhibitor, sulfide ore, spontaneous combustion, oxidation weight gain rate, inhibition effect