Abstract: There is 4.20 g/t gold, 1.76% arsenic in an arsenic bearing gold ore from Guangxi. Gold mainly in super micro or colloidal morphology packed in pyrite, arsenopyrite and secondary limonite. Gold is finely disseminated and difficult to be separated. To recovery the gold in ore, beneficiation test were conducted via direct leaching process and flotation-roasting-leaching process. The results showed that:①gold leaching rate by direct heap leaching process is low, leaching rate was only 28.48% at feeding granularity of -5 mm；②gold leaching rate by all slime cyanidation leaching process is only 28.48% at grinding fineness of -0.074 mm 6.58%；③gold leaching rate of 90.43% was obtained by flotation-roasting-leaching process at grinding fineness of -0.074 mm 5.74%, calcination temperature 550 ℃, sodium cyanide dosage of 1 500 g/t. Test results can be the basis for determination of dressing process for the gold ore.

Key words: Gold ore, Flotation, Roasting, Direct leaching