The invention discloses a tellurobismuthite leaching method. The method comprises the steps that crude tellurobismuthite is subjected to crushing treatment, and
grinding is conducted to enable the particle size to meet the requirement that 90% of ore
powder can pass through a 200-mesh
sieve; treated tellurobismuthite is put into a
roasting furnace,
roasting is conducted for 4 h to 6 h at the temperature
ranging from 400 DEG C to 450 DEG C, and tellurobismuthite subjected to
roasting is collected;
grinding is continuously conducted to enable the particle size to meet the requirement that 90% of ore
powder can pass through the 200-mesh
sieve, pretreated tellurobismuthite is put into a
sulfuric acid medium,
ozone with the concentration
ranging from 10 mg / h to 50 mg / h is introduced, an appropriate amount of surfactant is added, leaching is conducted at 70 DEG C to 80 DEG C, and
leachate is obtained, wherein 100 r / min to 200 r / min mechanical stirring is conducted in the leaching process, and the leaching stirring time ranges from 3 h to 4 h. According to the tellurobismuthite leaching method, the technological process is simple, operation is convenient, no special
equipment requirement exists, the cost is low, the method is suitable for
industrial scale production, the
leaching rate of
tellurium is 98% or above, the
leaching rate of
bismuth is 97% or above, and
tellurium and
bismuth in tellurobismuthite are fully leached; meanwhile, leached
leachate provides a good condition for extraction of downstream
tellurium and
bismuth.