The invention discloses a method for rapidly determining
sulfur species in a
solid-phase mineral by utilizing an
infrared-programmed heating oxidation
combination method. The method comprises the following steps of: (1) calibrating an
infrared detector and establishing a
standard curve by taking
silver sulfide as a calibration standard sample; (2) establishing a
sulfur species qualitative
database; (3) detecting
sulfur species in a to-be-detected
solid-phase mineral sample. The step (3) specifically comprises the following steps that: (a)
solid-phase mineral
powder is put into a roasted container, the container filled with the solid-phase mineral
powder is put into a constant-temperature area of a tubular furnace, and the final temperature and heating rate of the constant-temperature areaof the tubular furnace are set; (b) an
infrared carbon and sulfur analyzer is turned on,
computer control software is started, technical parameters are input, carrier gas
oxygen is opened, sampling isstarted after the baseline of the infrared carbon and sulfur analyzer is stable, meanwhile, the constant-temperature area of the
tube furnace starts to be heated, after the
software of the infrared carbon and sulfur analyzer automatically records a
sulfur dioxide escape curve, a sulfur quality curve is derived, and sulfur species in the solid-phase mineral are analyzed. According to the method, O2 is adopted to oxidize or pyrolyze the sulfur species in the solid-phase mineral, and SO2 formed by oxidation or
pyrolysis is monitored on line through the infrared carbon and sulfur analyzer.