Study On The Ozone Catalytic Oxidation Removal Of The Ypical Sulfide Flotation Collectors In Wastewater

Mining is the oldest industry in China, and still one of the fundamentalindustries for national economy development. Once mineral resources ismined and processed, the vicinity of mining sites is usually polluted byeffluents from flotation plants. With water scarcity a common sight, thedevelopment of wastewater reuse in mining industry has been put on theagenda. For the above reasons, the ozone catalytic technology in flotationwastewater treatment and reuse in a Pb/Zn flotation system was studied in thisthesis.Mesoporous alumina catalyst was dipped in Ru-Mn, the catalysator ofphase structure surface morphology of characterization is meaned by theX-ray diffraction (XRD), scanning electron microscopy (SEM), surface areathan (BET). The capacity and stability of catalyst was investigated by thesimulation wastewater of DDTC. The active components found catalystcompared to normal alumina high dispersion, small grains, mesoporousalumina surface area than ordinary alumina larger specific surface area,Ru-Mn-mAl2O3particles smaller, more uniform distribution, has more stablestructure of dense. The experimental data showed that the ozone catalyticoxidation process is better than the used alone catalyst or ozone; the CODCrofsimulation wastewater of DDTC removal rate can be reached72.50%.The simulation dressing wastewater of butyl xanthate, butylaminedithiophosphate and DDTC were removed by ozone catalytic oxidation, andCODCrof the simulation wastewater of three common collectors removal ratecan be reached62.25%,57.19%and72.50%. The catalyst has metal ionscatalytic performance to maintain good, the advantages of catalyst surfaceadsorption and desorption process is rapid. The organic phase can be removedby the hydroxyl radicals (·OH) in ozone catalytic oxidation system, throughthe mechanism experiment with tert-Butanol, UV spectroscopy analysis and ORP potential.By the the experiment of wastewater containing different collectorflotation with the pure mineral sphalerite and galena as flotation object, thegalena’s butyl xanthic flotation recovery of using the distilled water, recyclewastewater and ozone catalytic oxidation treatment of wastewater is88.01%,60.42%,84.61%; sphalerite’s butyl xanthic flotation recovery of using thedistilled water, recycle wastewater and ozone catalytic oxidation treatment ofwastewater is83.16%,46.84%and78.24%. Through the mechanism analysisof the galena flotation of mineral surface in different flotation wastewaterwith the Fourier infrared (FTIR), the flotation concentrate of hydrophilicgroups can be eliminated and restored flotation effect by using ozone catalyticoxidation for the surface of untreated cycle of wastewater.