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<p>Cerussite, a significant lead source, is typically extracted from ores via flotation. Due to its hydrophilic nature, sodium sulfide is often used to sulfidize the surface before flotation. This study examines how aging and heating affect the wettability of cerussite surfaces. The novel use of diesel oil as an auxiliary collector is explored to decrease cerussite surface hydrophilicity and thus decrease collector and sodium sulfide consumption. Drying samples at 150&#xa0;°C induced structural changes, altering the crystal structure and significantly increasing hydrophobicity, with the contact angle rising from 62° to 151°. X-Ray Diffraction (XRD), Fourier Transform Infrared Spectrometer (FTIR), and Scanning Electron Microscopy (SEM) analyses confirmed these modifications, which Thermal Gravimetric Analysis- Differential Scanning Calorimetry (TGA-DSC) analysis indicated occurred between 100 and 270&#xa0;°C. Micro-flotation optimization using diesel oil as an auxiliary collector, analyzed via a Central Composite Design (CCD), demonstrated that 5600&#xa0;g/t of diesel oil increased cerussite recovery to 98% while reducing sodium sulfide consumption by 76%. This research demonstrates that diesel oil significantly improves cerussite flotation efficiency and delivers substantial economic benefits. It also holds promise for lowering the overall environmental impact by greatly reducing the required sodium sulfide dosage, while utilizing only a trace amount of diesel oil.</p>

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Cerussite Wettability and Floatability: Effects of Aging, Heating, and Diesel Oil

  • 期刊论文

  • 发表日期：

    2026年4月28日

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  • Akram Mozafari,
  • Mohamad Reza Samadzadeh Yazdi

摘要

Cerussite, a significant lead source, is typically extracted from ores via flotation. Due to its hydrophilic nature, sodium sulfide is often used to sulfidize the surface before flotation. This study examines how aging and heating affect the wettability of cerussite surfaces. The novel use of diesel oil as an auxiliary collector is explored to decrease cerussite surface hydrophilicity and thus decrease collector and sodium sulfide consumption. Drying samples at 150 °C induced structural changes, altering the crystal structure and significantly increasing hydrophobicity, with the contact angle rising from 62° to 151°. X-Ray Diffraction (XRD), Fourier Transform Infrared Spectrometer (FTIR), and Scanning Electron Microscopy (SEM) analyses confirmed these modifications, which Thermal Gravimetric Analysis- Differential Scanning Calorimetry (TGA-DSC) analysis indicated occurred between 100 and 270 °C. Micro-flotation optimization using diesel oil as an auxiliary collector, analyzed via a Central Composite Design (CCD), demonstrated that 5600 g/t of diesel oil increased cerussite recovery to 98% while reducing sodium sulfide consumption by 76%. This research demonstrates that diesel oil significantly improves cerussite flotation efficiency and delivers substantial economic benefits. It also holds promise for lowering the overall environmental impact by greatly reducing the required sodium sulfide dosage, while utilizing only a trace amount of diesel oil.