(1. 中南大學(xué) 化學(xué)化工學(xué)院，長沙410083；
2. 吉首大學(xué) 化學(xué)化工學(xué)院，吉首 416000)
摘 要: 以水和乙醇為液體介質(zhì)，在一定的研磨條件下，對黃鐵礦粉體粒度和礦漿粘度隨研磨時間的變化進行了研究，并通過對黃鐵礦粉體在水和乙醇中的潤濕性、ξ電位、分散性的測定和擴展雙電層(EDLVO)理論計算，分析了引起這些變化的原因。結(jié)果表明：在超細濕磨過程中，礦漿粘度適當(dāng)時，才會獲得較高的研磨效率；液體介質(zhì)對粉體顆粒的界面作用影響很大，而粉體顆粒的界面作用決定了研磨過程中礦漿粘度的大小，從而影響研磨效率。
關(guān)鍵字: 黃鐵礦；超細粉碎；液體介質(zhì)；界面作用
grinding of pyrite
（1. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;
2. College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China）
Abstract:With ethanol or water as liquid medium, the changes of particle size and slurry viscosity of pyrite powder with the grinding time on the same grinding condition were studied. The possible reasons were analyzed by the measurements of wettability, zeta potential, dispersibility of pyrite in water and ethanol and by the calculation of EDLVO theory. The results show that higher grinding efficiency can be obtained at an appropriate slurry viscosity in the ultrafine grinding process. Liquid medium may change the interface interaction of particles that predominates the slurry viscosity and thus the grinding efficiency.
Key words: pyrite; ultrafine grinding; liquid medium; interface interaction
