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Piiot test procedure The research was performed in Tampere, Finland at the Metso Minerals Research Center using an HP200 cone crush- er. Feed was introduced into a surge bin by a loader, where it was drawn out by a variable-speed pan feeder. The feed was transferred by two conveyors with variable speed drive, which, along with two belt scales after the crusher, was used to ensure the correct throughput was achieved. A crusher feed hopper with deflector was used to ensure homogenous. centered feed to the crusher (Fig. 2). This study can be separated into three groups of testing: base tests, fixed tonnage tests and feed size dis tribution effect tests. The base tests were used to mea sure the crusher's maximum production capacity for a given eccentric speed. The fixed tonnage tests simulated operating conditions where the feed rate to the crushe is limited below the maximum capacity based on the base eccentric speed and CSS. The third set of tests uti lized a different feed size in order to verify results of the fixed tonnage tests; the reduced top size of the feed effectively minimized the effect of top size particles pos sibly being inhibited from entering the crushing cavity. The tests in each group used the same, homogenou feed of known characteristics, with a feed sample being taken approximately every fourth test for verification All crusher discharge belt cut samples were taken using accepted sampling standards, with discharge samples being collected for every test. Crusher adjustment ring vibration and countershaft speeds were measured and recorded, along with crusher power draw, both average and instantaneous peaks and valleys. The throughput o each test was taken from two cahbrated belt scales and from belt cut sample weight. Pictures and videos were taken during each test to visually record cavity levels and flow through the chamber. An open circuit configuration was used in every tes to ensure consistent feed properties. A local volcanite of known properties (medium-hard hardness, medium density) and specific size fractions was used for all tests The crusher was set up with a smooth liner configu ration; a stepped hner profile is common for second ary crushers, but these profiles can result in a situation where particles can have difficulty passing a step if the speed is at a critical point. The tests were completed over a four-day period. At every step, care was taken to ensure homogenous feed conditions and fixed testing parameters (outside of the eccentric speed). For the base tests, a coarse feed of an approximate size of 90 X 25 mm (3.5 x 1 in.) was used for testing. Th base tests were run at two different closed side settings one near the minimum setting, 19 mm (0.7 in.), and an- other near a typical secondary crusher operating setting of 32 mm (1.25 in.). Eight tests were run at a CSS of 32 mm (1.25 in.), with each test operating at a differen countershaft speed. A consistent cavity level of 300 mm (12 in.) over the feed plate was used over the course of the eight tests. This procedure was repeated with a 19-mm (0.7-in.) CSS at five speeds determined from results of the first set of tests, as well as one test each at a 25-mm (1-in.) and a 16-mm (0.6-in.) CSS to be used for comparison with fixed tonnage tests.
圆锥破碎机偏心速度对生产经营影响的研究概述：
有迹象表明，在矿物加工过程中，影响圆锥破碎机生产的有许多不同的机械设计参数和变量。这些变量的其中之一就是速度。在2012年6月的试点试验中，确定一个在生产和操作中比较宽泛的速度范围。在导致非最佳使用破碎能量的矿石特性和进料速率以及不一致的过程控制中，采矿业务将有变化。论文网本研究记录，在生产中测得具有操作模式和能源效率两种变化。总的来说，结果与理论还是相匹配的。当在满负荷运转时，用稍微粗的放电尺寸作为速度降低分布的一个总的趋势，在容量上分别有25％和17％的波动。在该压碎机具有较高的即4-14％的生产时，此时为所述操作的最佳速度，在这时分别使用一个固定的进料速率，二次分析表明，功率汲取一致性和幅度功率尖峰也可以通过优化锥体速度的方法来进行提高。可以在调试时改变破碎机的速度调整破碎机，以便适应不断变化的矿过的时间，或者在长时间使用的条件下可以作为先进的，由动态输入的控制系统。在每个动作上面，将有助于使破碎机向着更高效，更节能，更完善的过程控制发展，并且还将对机器机械效益