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Email:[email protected]The efficiency of the mill to break ore is a function of both the feed size distribution and the relative hardness of the ore When the feed size of a SAG mill becomes coarser ie α r increases ...We are a professional mining machinery manufacturer, the main equipment including: jaw crusher, cone crusher and other sandstone equipment;Ball mill, flotation machine, concentrator and other beneficiation equipment; Powder Grinding Plant, rotary dryer, briquette machine, mining, metallurgy and other related equipment. which can crush all kinds of metal and non-metallic ore, also can be dry grinding and wet grinding.If you are interested in our products or want to visit the nearby production site, you can click the button below to consult us.Welcome to our factory to test machine for free!
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More DetailsThe efficiency of the mill to break ore is a function of both the feed size distribution and the relative hardness of the ore When the feed size of a SAG mill becomes coarser ie α r increases
More DetailsThe control of the operation of semi autogeneous grinding SAG mills is mainly achieved through adjustments of feed rate water addition and speed of rotation With the introduction of image based sensors it is possible to have online measurements of the size distribution of the ore feeding a SAG mill
More DetailsJan 01 2015 · The feed size distribution is also the implicit result of the ore competence affecting blasting and crushing performance This distribution affects the SAG mill load and the load affects directly the mill power and the efficiency of the mill operation Van Nierop and Moys 2001 If a SAG mill has been designed with a conventional power or specific energy model which do not consider the projected feed size distribution
More DetailsHe concluded that the size distribution from a laboratory rod mill gave a similarshaped size distribution to that of a closed circuit laboratory ball mill He also demonstrated how a laboratory rod mill gave a similar shape of size distribution to a 36 inch 08 m Hardinge ball mill in closed circuit with a rake classifi er treating the same ore
More DetailsThe effects of ore blending on comminution behaviour and product quality in a grinding circuit Svappavaara is the hardest where primary rod mill grinding is concerned This is followed by the Kiruna ore FIGURE 14 PARTICLE SIZE DISTRIBUTION FOR
More DetailsTHE INFLUENCE OF MILL SPEED AND PULP DENSITY ON THE GRINDING EFFICIENCY 91 Graph 2 Particle size distribution for different mill speeds 688 solids 734 solids 759 solids Ore solids density 31 31 31 Dry feed rate kgh 289 288 287 Speed rpm 3531 3511 3500 Vcrit 7559 7517 7492 Absorbed power kW 5335 5628 5338
More DetailsUnderstanding the effects of liner wear on SAG mill performance ball size distribution change in the collisional environment in SAG SemiAutogenous Grinding mill as measured by the
More Detailsthe correct power required to grind ore in a SAG mill by developing ore hardness variability functions for the ore body to be mined This paper describes the next step in the SAG design Table 2 Effect of Load on Pilot Plant Throughput Load by Vol kgh of Feed of Maximum Remarks 26 174 1000 Max feed from pilot plant
More Details26 Effect of ball mixture 37 261 Ball size distribution in tumbling mills 37 262 Milling performance of a ball size distribution 40 27 Summary 41 Chapter 3 Experimental equipment and programme 43 31 Laboratory grinding mill configuration 43 32 Preparation of monosize grinding media 44 33 Feed material preparation 46
More DetailsEFFECT OF SAG MILL FILLING AND SPEED grind from the SAG mill The results are given in Figure 6 see next feed size distribution and ore hardness all have an influence on the grindcurve
More DetailsThe effects of ore blending on comminution behaviour and product quality in a grinding circuit Svappavaara is the hardest where primary rod mill grinding is concerned This is followed by the Kiruna ore FIGURE 14 PARTICLE SIZE DISTRIBUTION FOR
More Detailssteadystate is desirable in a grinding test because harder components may build up over time For AGSAG mills this may result in a critical size buildup and associated throughput losses The importance of steadystate testing increases with the ore heterogeneity On the other hand the batch tests eg Mod Bond SPI SMC Test generally
More DetailsThe Advanced Mine to Mill concept recognised these limitations and developed practical strategies to address them A brief list of some of these strategies is given below Produce optimum size distribution not just finer and balancing the transfer size between the SAG and ball mill to improve the overall circuit throughput Powell 2018
More DetailsThe analysis of the influence of ball sizes in SAG grinding hasnt been developed in detail by considering the effect on process parameters inside the mill grinding efficiency or internal classification Historically a conventional grinding reference has been made on
More Detailswhich can grind efficiently in a mill c is the exponent which characterizes the ball size distribution The condition for efficient grinding defined by Eq 7 will be fulfilled when the grain size distribution and the ball size distribution are the same which means that the parameters of both distributions are equal in Eqs 7 and 9 m c 10
More DetailsIf the transfer size to balance the power is outside the specified limits then the transfer size size is forced to the limit and the E SAG and E bm values are then calculated SAGlimited circuits where the T 80 hits the upper limit will result in the ball mill overgrinding unless the ball mill speed is reduced to control the grind size in
More Detailsenergy required which in this case was to grind the ore represented by the samples from a feed size F80 of 152 mm to 80 passing 17 mm and a simple adjustment procedure in case the SAG product size needed to be adjusted Bond rod and ball mill work indices are readily converted to pinion energy for rod and ball mills but not for SAG mills
More Detailssemiautogenous grinding mill Kojovic et al 201222 Figure 15 Comparison of SAG mill discharges for CuZn ore Klymowsky and Rijkers 199629 Figure 16 Effect of charge composition on specific rate in an opencircuit pilot plant Final mill load size distribution for different mill speeds at 28 total filling and
More DetailsThe geometry of a mill with conical ends is shown in Figure 86 The total volume inside the mill is given by Vm 4 D2 mL 1 2Lc L L 1 DtDm 3 1 DtDm 816 The density of the charge must account for all of the material in the mill including the media which may be steel balls in a ball mill or large lumps of ore
More DetailsEnergy Consumption in Crushing and Grinding The energy input to size ore fragments is large Overall reduction performed in a series of stages may be from an eighty percent feed size passing of 40 cm 158 inches to a final product size of 270 to 325 mesh 053 to 045 mm A lot of energy is expended to accomplish this and
More DetailsHPGR have been used for many years and are emerging as an energyefficient alternative to conventional and AGSAG comminution circuits One of the interesting features of HPGR is its capability to produce a particle size distribution with a greater than typical amount of fines thus reducing the power requirement for the downstream ball mill
More DetailsThe purpose of the primary crusher is to reduce the ROM ore to a size amenable for feeding the secondary crusher or the SAG mill grinding circuit The ratio of reduction through a primary crusher can be up to about 81 Feed ROM up to 15 m Product 300mm for transport to 200mm for SAG mill Feed Rate 160 to 13000 tph
More DetailsEvery second counts and adjusting these parameters within seconds can have a significant effect on the wear of your SAG mill which will effect on your bottom line SAGwise TM reduces your mill’s ballonliner impacts with up to 45 per cent which prolongs liner life and minimises media degradation
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