(中南大學 資源加工與生物工程學院，長沙 410083)
摘 要: 通過浮選試驗、沉降實驗、Zeta電位測試和吸附量測試，研究以六偏磷酸鈉和古爾膠為調整劑時，蛇紋石和滑石的同步抑制及其機理。結果表明：在較寬pH范圍內，蛇紋石與滑石顆粒表面電性相反，易發(fā)生異相凝聚，使得硫化礦浮選的降鎂難度增大；六偏磷酸鈉和古爾膠的組合使用能較好地同步抑制蛇紋石和滑石，實現(xiàn)與黃鐵礦的人工混合礦分離；六偏磷酸鈉使得蛇紋石顆粒表面動電位由正變負，蛇紋石與滑石顆粒間分散，從而提高古爾膠在滑石表面的吸附量。研究并提出對蛇紋石和滑石的混合鎂硅酸鹽礦物應是首先消除顆粒間的異相凝聚，再抑制易浮礦物的同步抑制原理。
關鍵字: 蛇紋石；滑石；分散；抑制
（School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:Using sodium hexametaphosphate and guar gum as regulators, the sync suppression and mechanism of serpentine and talc were studied by flotation tests, sedimentation tests, Zeta potential measurements and adsorption measurements. The results show that the surface potential of serpentine and talc particles is contrast in a wide pH range, leading to heteroaggregation between the serpentine and talc particles, which makes lowing magnesium in sulfide ore flotation process difficult. The serpentine and talc is sync suppressed and separated from the artificial mixed mineral of pyrite with sodium hexametaphosphate and guar gum. Sodium hexametaphosphate makes the surface potential of serpentine particles from the positive into negative, which results in serpentine and talc particles dispersing and the adsorption of guar gum on talc surface increasing. The sync suppression principle is that heteroaggregation between the serpentine and talc particles should be eliminated firstly, then depress the easy floating minerals.
Key words: serpentine; talc; dispersion; suppression
