纳米陶瓷球是一种以高铝为主要成分的轻比重磨矿介质.以1.18~2 mm、0.6~1.18 mm、0.3~0.6 mm 3个粒级样为研究对象,对其分别采用相同直径的纳米陶瓷球和钢球进行分批次磨矿试验,分析了其磨矿产品的粒度分布和磨矿能耗分布、能量利用率....纳米陶瓷球是一种以高铝为主要成分的轻比重磨矿介质.以1.18~2 mm、0.6~1.18 mm、0.3~0.6 mm 3个粒级样为研究对象,对其分别采用相同直径的纳米陶瓷球和钢球进行分批次磨矿试验,分析了其磨矿产品的粒度分布和磨矿能耗分布、能量利用率.试验结果表明,纳米陶瓷球作为细磨介质,与钢球相比,磨矿产品也有相同的粒度分布规律,符合JK粒度破碎模型.在相同磨矿条件下,纳米陶瓷球磨矿生产能力显然比不上钢球.但纳米陶瓷球比重轻,对能量利用程度大,磨矿产品中过粉碎更轻.纳米陶瓷球可能是立式球磨机中一种新型细磨介质.展开更多
都龙矿区是我国一座含有大量共伴生稀贵金属的大型锌锡铜复杂多金属矿床。矿石成分复杂,嵌布粒度细,细磨是实现较高的精矿品位和回收率的关键。目前,矿区选厂采用特种钢球作为细磨的介质,存在负荷大、能耗高,细度达不到工艺技术要求等问...都龙矿区是我国一座含有大量共伴生稀贵金属的大型锌锡铜复杂多金属矿床。矿石成分复杂,嵌布粒度细,细磨是实现较高的精矿品位和回收率的关键。目前,矿区选厂采用特种钢球作为细磨的介质,存在负荷大、能耗高,细度达不到工艺技术要求等问题,为此,开展了纳米陶瓷球在复杂多金属矿铜粗精矿细磨的应用研究。研究结果表明,纳米陶瓷球有效的提升了磨矿效率,铜粗精矿再磨细度达到了-0.037 mm 占80%以上,且无铁离子干扰,很好地改善了选矿指标。在原矿含铜略有下降的前提下,铜精矿品位提高1%,铜精矿回收率提升6%。同时,球耗、能耗下降明显,球耗仅为轴承钢球的六分之一、电耗可节约24%。每年可为公司增效1 000多万元。展开更多
The aim of present work was to produce pure nickel aluminate （NiAl2O4） nanoceramic compound by high energy millingof nickel carbonate （NiCO3） and aluminum （Al） powders followed by annealing. Phase composition, t...The aim of present work was to produce pure nickel aluminate （NiAl2O4） nanoceramic compound by high energy millingof nickel carbonate （NiCO3） and aluminum （Al） powders followed by annealing. Phase composition, thermal behavior, morphologyand microstructure of powder samples were characterized by means of X-ray diffraction, differential scanning calorimeter,thermogravimetric analysis, scanning electron microscopy and transmission electron microscopy. The results showed that formationof NiAl2O4 spinel compound from NiCO3 and Al powders took place in three steps： oxidation of Al to Al2O3, decomposition ofNiCO3 to NiO and CO2, and finally the solid state reaction between Al2O3 and NiO. It was also demonstrated that single phaseNiAl2O4 spinel compound can be produced by 5 h of mechanical milling with subsequent annealing of NiCO3/Al mixture at 900 Cfor 2 h, which is 冾 500 C lower than the temperatures used in the traditional solid state methods. The particle diameter of theproduced NiAl2O4 spinel compound was found to be less than 100 nm as measured by transmission electron microscopy.展开更多
文摘纳米陶瓷球是一种以高铝为主要成分的轻比重磨矿介质.以1.18~2 mm、0.6~1.18 mm、0.3~0.6 mm 3个粒级样为研究对象,对其分别采用相同直径的纳米陶瓷球和钢球进行分批次磨矿试验,分析了其磨矿产品的粒度分布和磨矿能耗分布、能量利用率.试验结果表明,纳米陶瓷球作为细磨介质,与钢球相比,磨矿产品也有相同的粒度分布规律,符合JK粒度破碎模型.在相同磨矿条件下,纳米陶瓷球磨矿生产能力显然比不上钢球.但纳米陶瓷球比重轻,对能量利用程度大,磨矿产品中过粉碎更轻.纳米陶瓷球可能是立式球磨机中一种新型细磨介质.
文摘都龙矿区是我国一座含有大量共伴生稀贵金属的大型锌锡铜复杂多金属矿床。矿石成分复杂,嵌布粒度细,细磨是实现较高的精矿品位和回收率的关键。目前,矿区选厂采用特种钢球作为细磨的介质,存在负荷大、能耗高,细度达不到工艺技术要求等问题,为此,开展了纳米陶瓷球在复杂多金属矿铜粗精矿细磨的应用研究。研究结果表明,纳米陶瓷球有效的提升了磨矿效率,铜粗精矿再磨细度达到了-0.037 mm 占80%以上,且无铁离子干扰,很好地改善了选矿指标。在原矿含铜略有下降的前提下,铜精矿品位提高1%,铜精矿回收率提升6%。同时,球耗、能耗下降明显,球耗仅为轴承钢球的六分之一、电耗可节约24%。每年可为公司增效1 000多万元。
文摘The aim of present work was to produce pure nickel aluminate （NiAl2O4） nanoceramic compound by high energy millingof nickel carbonate （NiCO3） and aluminum （Al） powders followed by annealing. Phase composition, thermal behavior, morphologyand microstructure of powder samples were characterized by means of X-ray diffraction, differential scanning calorimeter,thermogravimetric analysis, scanning electron microscopy and transmission electron microscopy. The results showed that formationof NiAl2O4 spinel compound from NiCO3 and Al powders took place in three steps： oxidation of Al to Al2O3, decomposition ofNiCO3 to NiO and CO2, and finally the solid state reaction between Al2O3 and NiO. It was also demonstrated that single phaseNiAl2O4 spinel compound can be produced by 5 h of mechanical milling with subsequent annealing of NiCO3/Al mixture at 900 Cfor 2 h, which is 冾 500 C lower than the temperatures used in the traditional solid state methods. The particle diameter of theproduced NiAl2O4 spinel compound was found to be less than 100 nm as measured by transmission electron microscopy.
