Abstract: The lithiumbearing bauxite which comes from Henan province contains 0.26% Li2O,and lithium mainly occurs in the kaolinite and illite.In order to determine the development and utilization of lithiumbearing bauxite technology,bauxite flotation tests and the experimental study on the extraction of lithium have been carried out.The results show that through two roughings,one cleaning and middling back to the flowsheet in turn flotation closedcircle process,the final Al2O3 grade is 61.72%,A/S is 11.45,and Li2O grade is 0.57%,recovery rate is 78.97%;Rich lithium concentrate with concentrated sulfuric acid curing liquid mixed (solidliquid ratio 1∶1,the curing temperature 180 ℃,leaching liquidsolid ratio 2∶1 to 3∶1,10 min leaching time,leaching temperature at room temperature,the leaching rate of Li2O can reach 9464% and got the purity of 99.56% lithium carbonate products finally.Thus,the process of sulfuric acid curingleachingpurificationextracting lithiumcan achieve high recovery rate and purity of lithium in Henan bauxite,and this process has certain practical value.

Key words: lithiumbearing bauxite, flotation test, leaching test, comprehensive recovery