Citric acid inhibits the floatability of quartz in Mg²⁺ system

Abstract

Citric acid is a small-molecule organic acid, which can be used as an inhibitor for the flotation of Mg 2+ activated quartz. Methods such as flotation experiments, zeta potential, FTIR qualitative and quantitative calculations, and solution chemistry calculations were used in this study to conduct systematic research to study activation and inhibition mechanisms. The results show that adding only a quarter of citric acid under the optimal conditions of Mg 2+ activated quartz produces the best inhibitory effect. Mg 2+ and citric acid affect the zeta potential of the quartz surface in the zeta potential experiment. FTIR qualitatively found that under the action of Mg 2+ , sodium oleate was adsorbed on the quartz surface in the form of physical adsorption; quantitative analysis clearly explained that after the chemical reaction between citric acid and Mg 2+ , it desorbed from the quartz surface into the water system. According to the chemical calculation of the solution during the flotation process, it is found that the reaction product of citric acid and Mg 2+ has no inhibitory effect; only the amount of Mg 2+ is consumed, thereby reducing the number of activating factors and cutting off the medium of sodium oleate adsorbed on the surface of the quartz.

Porous alkali‐activated material from hypergolic coal gangue by microwave foaming for methylene blue removal

“…The characteristic bands of HCG are similar to those of calcined coal gangue in the literature 77,78 . The characteristic absorption bands at 1091, 797, 778, and 695 cm −1 are ascribed to quartz 79–81 . The broad peak at 3441 cm −1 is the characteristic of O–H asymmetric stretching (3000–3700 cm −1 ), which is associated with the formation of hydrated compounds 72,82,83 .…”

“…77,78 The characteristic absorption bands at 1091, 797, 778, and 695 cm −1 are ascribed to quartz. [79][80][81] The broad peak at 3441 cm −1 is the characteristic of O-H asymmetric stretching (3000-3700 cm −1 ), which is associated with the formation of hydrated compounds. 72,82,83 The bending vibration of O-H is observed at ∼1626 cm −1 , indicating the presence of water molecules.…”

Study on the mechanism of the difference in flotation performance between fine-grained crystalline SiO₂ and amorphous SiO₂

“…The concentration of the flotation agent DDA's dissociated components in the pulp was determined using the tracing method (Wang, 1988;Hu and Li, 1990). And draw the relationship between the concentration of dissociated components and the pH value of the pulp, that is, the lgC-pH diagram.…”

“…When the thickness of the potassium bromide sheet is assured to be constant, the material content and absorbance are proportionate. Therefore, the content of the two substances can be compared according to the peak area of the absorption peak of the calculated absorbance spectrum (Wang et al, 2021).…”