The effects of several collectors and their dosage on pure ilmenorutile atdifferent pH values were studied and the collecting strength of several representative collectorswas investigated. The experimental results ind...The effects of several collectors and their dosage on pure ilmenorutile atdifferent pH values were studied and the collecting strength of several representative collectorswas investigated. The experimental results indicate that diphosphonic acid is a good collector forilmenorutile and the recovery of ilmenorutile ranges from 90.87 percent to 91.70 percent when thepulp pH value is 2.0-4.0 and the dosage is 75 mg/L. The sequence of collecting ability for severalcollectors is as follows: diphosphonic acid> TF279 > cyclic allryl hydroximic acid > benzyl arsenicacid> salicylic hydroximic acid> alkyl hydroximic acid. Meanwhile, IAS (infrared absorptionspectrum) and XPS (X-ray photoelectron spectroscopy) were used to detect and analyze the actionmechanism of diphosphonic acid on ilmenorutile. IAS results showed that the characteristicabsorption peak relating to P=O as well as P-O vibration occurred between wave numeber 1140 and 1032cm^(-1), and diphosphonic acid had adsorbed on the surface of ilmenorutile. XPS results indicatedthat the binding energy of P2P peak of ilmenorutile had changed 0.45 eV after treated bydiphosphonic acid. This proves that the adsorption is mainly chemical adsorption.展开更多
文摘The effects of several collectors and their dosage on pure ilmenorutile atdifferent pH values were studied and the collecting strength of several representative collectorswas investigated. The experimental results indicate that diphosphonic acid is a good collector forilmenorutile and the recovery of ilmenorutile ranges from 90.87 percent to 91.70 percent when thepulp pH value is 2.0-4.0 and the dosage is 75 mg/L. The sequence of collecting ability for severalcollectors is as follows: diphosphonic acid> TF279 > cyclic allryl hydroximic acid > benzyl arsenicacid> salicylic hydroximic acid> alkyl hydroximic acid. Meanwhile, IAS (infrared absorptionspectrum) and XPS (X-ray photoelectron spectroscopy) were used to detect and analyze the actionmechanism of diphosphonic acid on ilmenorutile. IAS results showed that the characteristicabsorption peak relating to P=O as well as P-O vibration occurred between wave numeber 1140 and 1032cm^(-1), and diphosphonic acid had adsorbed on the surface of ilmenorutile. XPS results indicatedthat the binding energy of P2P peak of ilmenorutile had changed 0.45 eV after treated bydiphosphonic acid. This proves that the adsorption is mainly chemical adsorption.
