共查询到20条相似文献,搜索用时 203 毫秒
1.
在地下开采中,从采区底部的放矿巷道用振动放矿机放矿是改进回采工艺的先进技术之一。根据矿山技术条件,用于放矿采用有各种不同结构的振动机械。如振动放矿机,振动溜口,振动平台和振动带。在用大量崩落法和矿房式回采法开采厚矿体时应用最多的是带惯性传动装置的振动放矿机,它们安装在放矿漏斗下面的峒室里或者安装在装运巷道的端部。振动放矿机与皮带运输机联合使用可以实现矿石的连续回采。 相似文献
2.
3.
一、前言黑色金属、有色金属、稀有金属、贵金属、非金属选矿厂和选煤厂,在选别过程中都装有大量各种选矿设备、运输设备、脱水设备,如破碎机(颚式破碎机、圆锥破碎机、锤式破碎机)磨矿机、筛分机、给矿机、皮带运输机、过滤机、跳汰机等等,这些设备发出的噪声和振动,大部分都超出允许的噪 相似文献
4.
5.
1 前言 振动放矿机以其无比的优越性代替了气动链式漏斗、气动扇形闸门放矿,成为我国井下矿的主要放矿设备.山东金岭铁矿年产原矿 100 万t,是一个采选联合企业,下辖三个分矿(从事井下采掘),原来振动放矿机仅在井下采区溜井应用,主要型式为普通电机通过三角皮带带动激振器的振动放矿机和附着式振动放矿机,这两种型式在使用中存在的主要问题是:①普通电机因起动频繁易烧毁,三角皮带易打滑、跳槽、断皮带;振动电机因安装在振台底板之下,安装和维护不便,其固定螺栓易松动,易受矿仓中流下的淋水浸蚀受潮而烧毁.②振台底板易振裂、振断.③振台的密封易失效,振台易向下滑移、难复位.④振动放矿机的使用寿命较短. 相似文献
6.
1 前 言 振动放矿机以其无比的优越性代替了气动链式漏斗、气动扇形闸门放矿 ,成为我国井下矿的主要放矿设备。山东金岭铁矿年产原矿 1 0 0万 t,是一个采选联合企业 ,下辖三个分矿 (从事井下采掘 ) ,原来振动放矿机仅在井下采区溜井应用 ,主要型式为普通电机通过三角皮带带动激振器的振动放矿机和附着式振动放矿机 ,这两种型式在使用中存在的主要问题是 :1普通电机因起动频繁易烧毁 ,三角皮带易打滑、跳槽、断皮带 ;振动电机因安装在振台底板之下 ,安装和维护不便 ,其固定螺栓易松动 ,易受矿仓中流下的淋水浸蚀受潮而烧毁。 2振台底板… 相似文献
7.
矿山工业中广泛的使用着各种振动机械:振动给料机、振动运输机、振动筛,共振筛、振动离心机、振动放矿机、振动摇床、振动冷却机等等。在设计这些机械时,功率计算是一项重要内容。目前,就理论意义上来说,还不能认为振动机械功率计算的各方面问题已经完全解决了。现在有这样一些问题:1、中南矿冶学院矿山系设计了一台振动放矿机并在矿山中使用得很成功,但是在运转过程中发现;该机有时功率消耗极大,几乎烧 相似文献
8.
9.
10.
峨口铁矿中细破碎段有7台HP500型圆锥破碎机,破碎成品粒度为0~12mm,生产能力为400~600t/h。由于HP500型圆锥破碎机给矿效率低,给矿时机器振动大。因此,该矿自主设计了安全、高效、简便的梯形缓冲给矿装置。1原给矿装置存在的问题HP500型圆锥破碎机由料嘴给矿,因不能连续、 相似文献
11.
细碎圆锥破碎机的选择是实现"多破少磨"的关键。介绍了各种圆锥破碎机的性能特点,建议使用方根据待破碎物料的物理特征和用户的破碎目标,选择合适类型的圆锥破碎机。 相似文献
12.
13.
Particle damage and exposure analysis in HPGR crushing of selected copper ores for column leaching 总被引:2,自引:0,他引:2
Phanindra Kodali Nikhil Dhawan Tolga Depci C.L. Lin Jan D. Miller 《Minerals Engineering》2011,24(13):1478-1487
In mining operations, jaw and gyratory crushers are generally used for primary crushing, and cone crushers are used for secondary crushing. During the past decade, however, high-pressure grinding rolls (HPGR) are being considered due to potential processing benefits such as energy savings, improved exposure/liberation and particle weakening. At this time there is no detailed quantification of particle damage and downstream benefits from HPGR crushing are uncertain. In the present research, copper ores (copper oxide ore and copper sulfide ore) were crushed by a jaw crusher and by HPGR and the products were evaluated for particle damage and copper grain exposure by X-ray computed tomography. Column leaching was done to determine the rate and extent of copper recovery.X-ray computed tomography analysis and laboratory column leaching experiments for copper oxide ore revealed that products from HPGR crushing have more particle damage and higher copper recoveries when compared with products of the same size class from jaw crusher crushing. Generally the copper recovery from column leaching of the oxide ore was found to be dependent on the extent of grain exposure, which increases with a decrease in particle size.In the case of the copper sulfide ore, copper recovery was found to be independent of the crushing technique despite the fact that more particle damage was observed in products from HPGR crushing. This unexpected behavior for the copper sulfide ore might be due to the high head grade and strong leach solution. Column leaching results also show that about 80–90% of the copper was recovered from the copper sulfide ore in a relatively short leaching time irrespective of crushing technique. As expected, copper recoveries improved with a decrease in the particle size of the copper sulfide ore as exposure of copper mineral grains increased. 相似文献
14.
惯性圆锥破碎机在金属矿山的研究应用 总被引:3,自引:0,他引:3
惯性圆锥破碎机是一种具有独特原理和结构的新型节能超细破碎设备,能实现物料的选择性破碎,满足“多碎少磨”新工艺的要求。该机不仅破碎比大,产品粒度细而均匀,而且单位电耗低,能破碎任何硬度的脆性物料,十分适合于金属矿山的破碎磨矿流程。本文简述了惯性圆锥破碎机的结构特点和工作原理,介绍了该机在金属矿山的应用情况。 相似文献
15.
介绍了鞍山地区贫赤铁矿选矿工艺中,破碎设备的使用情况;通过对Sandvik与Nordbeg中细碎圆锥破碎机设备结构及技术指标的对比,提出鞍山地区贫赤铁矿破碎工艺中,联合应用Sandvik和Nordbeg圆锥破碎机,破碎效果更佳。 相似文献
16.
采用惯性圆锥破碎机综合回收钢渣的工艺研究 总被引:1,自引:0,他引:1
钢渣破碎是钢渣综合回收中的关键技术,针对钢渣破碎的传统工艺中卡钢的问题,提出采用惯性圆锥破碎机综合回收钢渣新工艺。惯性圆锥破碎机具有选择性破碎和良好的过铁性能。通过宣化钢铁公司的生产实践证明,采用惯性圆锥破碎机综合回收钢渣的工艺彻底解决了钢渣破碎中的卡钢和钢与渣解离的技术难题。 相似文献
17.
分析了金口岭铜矿碎矿工艺存在的流程不合理、设备负荷不均、无法满足球磨工艺要求等主要问题。提出了解决问题的四种方案 ,并阐明了作者对改造所持的观点 ,即将现有PYD2 10 0弹簧圆锥破碎机改为单缸液压短头圆锥破碎机 (PYY16 5 0 /10 0型 ) ,同时振动筛筛孔尺寸分别为 2 2mm和 16mm ,处理铜矿石用 2台筛子 ,处理转炉渣用 1台筛子 ,从而保证两种矿石的不同产品的粒度要求。改造实施后可提高生产效率 2 8%以上 ,每年可创效益 6 0万元以上。 相似文献
18.
19.
焦家金矿破碎机腔型改造的实践 总被引:4,自引:0,他引:4
介绍了焦家金矿颚式破碎机、标准圆锥破碎机和短头圆锥破碎机的腔型改造 ,使最终破碎产品中 - 1 4mm ( 2 5mm以下均为圆孔筛粒度 )含量从 73 2 8%增加到80 1 0 % ,使磨矿能力提高了 5 73% ,实现了多碎少磨 ;同时 ,颚式破碎机和短头圆锥破碎机衬板寿命延长到原来的 1 5~ 2 0倍。 相似文献
20.
Cone crushers are used in the mineral, mining, and aggregate industry for fragmentation of rock materials. Control systems for cone crusher settings are widely used for compensating for wear and protecting the machines from high pressure. However, these systems focus on the crusher and not the crushed products.By applying measurement devices on the process the crusher can be run optimally from the saleable products point of view (unlike most existing systems which only protect the machine) in each time. The measurement devices can be mass flow meters, e.g. conveyor belt scales. To analyze data from the process and convert them to a desired CSS value, an algorithm was developed.The developed algorithm is tested and evolved at a real crushing plant for aggregates. The algorithm was loaded into a computer which could communicate with the crusher control system, read data from three mass flow meters, and also interact with the operators. The computer was reachable over the Internet by the researchers at Chalmers and the algorithm was tuned and improved on-line.The result is an algorithm which was capable of providing CSS set-points to the automatic setting regulation system. The amount of saleable product from the crushing stage improved 3.5%, when not limited by the hydraulic pressure, compared to when a fixed closed side setting is used. The use of the algorithm automatically compensates for changes in the feed material and it also decreases the need for calibration of the underlying system. 相似文献