Change Law of Apparent Density of Calcite in Sulfuric Acid Solution and Its Influence on Separation
The effects of sulfuric acid concentration,calcite particle size,sodium dodecyl sulfate(SDS)dosage and flow rate of dynamic fluid on the apparent density of calcite particles during acid reaction were studied.The results show that when the sulfuric acid concentration is 1%,calcite can sustain at the low apparent density state,and the smaller the calcite sizes,the lower the apparent densities.SDS with a concentration of 300 mg/L can enhance the hydrophobicity of calcite,increase effectively the adsorption density and residence time of CO2 bubbles on calcite,and prolong the duration of low apparent density of calcite.Dynamic fluids may accelerate desorption of gas bubbles from calcite,which is detrimental to the reduction of apparent density of calcite during acid reaction process,but the SDS treatment can significantly reduce this detrimental effect.Settling tests show that acid reaction can prolong the settling time of calcite particles,creating favorable conditions for the separation of calcite and non-carbonate minerals by gravity concentration.
calciteapparent densityCO2 bubblessodium dodecyl sulfate(SDS)dynamic fluidfluoritefluidized bed separationsulfuric acid
万方数据
维普
