The dissolution behavior and rule of calcium chromates in acid or alkali solution are very important for efficiently extracting chromium.Therefore,the thermodynamics conditions concerning the formation of CaCrO4,CaCr2O7 and β-CaCr2O4 were comprehensively analyzed.Under the condition of keeping the constant solution,the dissolution rule of CaCrO4 and CaCr2O7 respectively in H2SO4 and NaOH solution was investigated under different acidity and temperatures.In addition,the occurrence state of CaCrO4 in the solu...