凹山选矿厂多碎少磨工艺探讨

介绍了高效破碎技术——高压辊磨机对凹山选厂细碎产品进行半工业试验及阶段磨选试验研究的情况。试验结果表明，原矿入磨粒度和入磨量可大幅度降低，可提高选厂技术指标和生产能力，从节能、提质、环保等方面均可产出很大效益，具有较好的应用前景。     

炸药破碎安全控制及其可靠性设计

炸药破碎设备是实现过期炸药重复利用和炸药生产中边角料合理处置的关键工艺装备,针对其工艺过程安全性和电气控制系统可靠性要求高的特点,分析了系统实现原理,为实现新型炸药破碎技术的全面推广应用,提出了控制系统设计的安全措施,并采用了安全性设计法、冗余设计法和预防故障设计法,保证了系统可靠性。     

液力偶合器在惯性圆锥破碎机的应用研究

简述惯性圆锥破碎机的结构特点、运动分析及限矩型液力偶合器的结构传动原理，讨论了加装液力偶合器后所具有的功能。在此基础上，探讨其推广应用的可行性。     

破矿堆浸经济粒度

本文介绍破矿堆浸经济粒度概念及经济粒度求解方法。     

太和铁矿碎矿车间除尘技术改造

太和铁矿碎矿车间投产以后，粉尘污染一直严重。在除尘技术改造中，采用了CJ除尘器，除尘罩的设计因地制宜，确定除尘风量时主要参考其他矿山成功的经验，除尘管道按“等速”原则设计并设插板阀调整系统，实现了预期的目标，工作面卫生达标、除尘系统排放达标。     

超细粉体在复合材料中的功能作用及加工技术

矿物超细粉体作为高性能混凝土、塑料、纸张等复合材料的填充组分，具有降低成本、改善制品性能的作用。论述了矿物超细粉体的功能作用及产生原因和超细粉碎、表面改性技术。     

Ultimate pit limit determination for semi mobile in-pit crushing and conveying system: a case study

ABSTRACT

Semi mobile in-pit crushing and conveying systems have different pit shape requirements to traditional truck haulage systems due to the inclusion of a conveyor flight in the pit. As the shape of a pit is heavily influenced by the ultimate pit limit, it is desirable to have the additional shape requirements included in the ultimate pit limit determination process. This paper introduces in-pit crushing and conveying systems and discusses their differences and benefits. The differences and requirements of pit design between truck haulage and semi mobile in-pit crushing and conveying systems are then highlighted. A method of including the additional requirements during the ultimate pit limit determination is presented. A case study has been included that shows the method working successfully, with scheduling of the pits to further highlight semi mobile in-pit crushing and conveying viability. This case study shows that through the reduced mining costs, a semi mobile in-pit crushing and conveying pit can return a higher Net Present Value, despite being smaller than the traditional truck and shovel pit for the same deposit. The development of this method provides the opportunity for the metalliferous industry to accurately determine ultimate pit limits for a mines considering the use of semi mobile in-pit crushing and conveying systems.     

模糊综合评判在选矿机械设备中的应用

选矿设备在选矿厂生产中起着非常重要的作用,如何较好地选择和使用选矿机械设备,充分发挥其效能并做到经济合理运用模糊评判方法可以很好地达到这一目的。     

GYP-1200惯性圆锥破碎机在金属矿山的应用研究

分析了破磨成本与入磨粒度的关系,介绍了惯性圆锥破碎机的结构、特点及主要技术参数,通过总结近年来GYP-1200惯性圆锥破碎机在金属矿山行业中的实际应用情况,表明该机能有效降低矿石入磨粒度,很好地满足"多碎少磨"新工艺的要求,大大降低破磨生产的电耗、钢耗,节约选矿成本,有助于金属矿山选矿厂实现节能减排、资源的综合利用。     

Hypoplastic model for crushable sand

A constitutive model for granular materials which considers grain crushing effects is developed in the framework of hypoplasticity. As grain crushing occurs the behaviour of granular material can usually be significantly affected. Several empirical relations between peak strength, uniformity coefficient and stiffness of sand depending on stress level or amount of grain crushing have been derived in the past. In this paper, such relations are employed to improve a basic hypoplastic constitutive model based on the changes of stress level or grain size distribution. In the proposed modified hypoplastic model only two additional physical parameters, namely uniformity coefficient and mean grain size are incorporated. The validation of the modified model for three different sands under triaxial test response with cell pressures up to 30?MPa is presented and shows a significantly better correspondence with regard to the original basic hypoplastic model.