Sep 09, 2016· The grinding media for a ball mill is usually steel balls sized from about 1 to 10 cm in diameter, and for rod mills about 1 to 10 cm in diameter, with the length being slightly shorter than the length of the rod mill The grinding circuit product can be made very fine, if necessary, with the majority of material finer than 20 microns (um)
Know MoreBall Mills 【Capacity】 From 02-90 T/H 【Advantages】Designed for long service life, minimum maintenance, can grind and homogenize mineral ores down to the nano range, large volume of processing capacity 【Max Feeding size】
Know MoreSep 17, 2019· The size of ore shall not exceed 65mm and the best feed size is under 6mm The effect in this job is better than coarse grinding Grid ball mill consists of the shell, feeding part, discharging part, main bearing, lubricating system, driving system and other parts
Know MoreBall mills give a controlled final grind and produce flotation feed of a uniform size Ball mills tumble iron or steel balls with the ore The balls are initially 5–10 cm diameter but gradually wear away as grinding of the ore proceeds The feed to ball mills (dry basis) is typically 75 vol-% ore and 25% steel
Know MoreIn fact, ball-mill grinding is one of the most energy-consuming techniqu Therefore, setting the optimal values of the operational and mineralogical parameters both for the initial design and .
Know MoreFor ball mill, Bond (1958) was proposing an empirical formula giving the top size of balls (make-up balls) DM function of the feed size xG (80% passing size - µm), the ore true specific gravity sg, the ore Bond Work Index Wi (kWh/st), the fraction of critical speed fc and the inside mill diameter D (m):
Know Moregrinding quartz and copper ore in a laboratory ball mill, there has been defined a general form of the equation for determining: the optimal ball diameter depending on the grain size being ground; and the parameter of the equation through which the influence of a mill is being
Know MoreMar 19, 2017· However, ball coating and packing can increase the work input in dry grinding The accompanying procedure and table can be used to shorten the calculations required with the new formula The values of 445/(P1) 023 are listed for each mesh size, and the values of (Gbp) 082 can be found by interpolation from the table
Know MoreEURASIAN MINING • 1 2015 Technology and technics of ore preparation processes 7 feed for the rod mill, ie 10000 μm in accordance with Table The value of P 80 is accepted based on the required grain-size characteristics of the ball mill discharge
Know MoreThe 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 2(Lc L) L 1 (Dt/Dm) 3 1 Dt/Dm (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 ,
Know MoreJun 01, 2018· During the grinding process, coarser material (size class 1) break to finer material (size class 2) and (size class 3) which are termed the daughter products, as shown in Fig 1A chemical reaction on the other hand can consist of say reactant ‘A’ forming intermediate product ‘B’ then proceeding to final product ‘C’ or a competing reactant ‘A’ to final product ‘D’ can also .
Know MoreThe ball mill work index laboratory test is conducted by grinding an ore sample prepared to passing 336 mm (6 mesh) to product size in the range of 45-150 µm (325-100 mesh), thus determining the ball mill work index (Wi B or BWi)
Know Moreadditional grinding in the ball mill, or “Corrected Ball Mill Feed” T2’ is the 80% passing dimension of the Corrected Ball Mill Feed Figure 1 Comparison of the Particle Size Distribution Slopes Figure 2 Relationship Between the Transfer Size Distribution Slope and T 80 or AWi0/BWi Figure 3 Typical Circuit and Shortcut Taken by the .
Know MoreHello Msammet, im also facing the same problem do you manage to figure it out i want to design a 3-5ton/hr ball mill for gold ore but i dont know where to start from Please join and login to participate and leave a comment
Know MoreThe ball mill work index laboratory test is conducted by grinding an ore sample prepared to passing 336 mm (6 mesh) to product size in the range of 45-150 µm (325-100 mesh), thus determining the ball mill work index (Wi B or BWi) The work index calculations across a narrow size range are conducted using the appropriate laboratory work .
Know MoreApr 08, 2021· In Grinding, selecting (calculate) the correct or optimum ball size that allows for the best and optimum/ideal or target grind size to be achieved by your ball mill is an important thing for a Mineral Processing Engineer AKA Metallurgist to do Often, the ball used in ball mills is oversize “just in case” Well, this safety factor can cost you much in recovery and/or mill ,
Know MoreApr 08, 2018· The ball mill motor power requirement calculated above as 1400 HP is the power that must be applied at the mill drive in order to grind the tonnage of feed from one size distribution The following shows how the size or select the matching mill required to draw this power is calculated from known tables ‘the old fashion way’
Know MoreFeb 05, 2014· Ball mill is the key equipment of regrinding the material after the materials being broken It is used in grinding all kinds of ores and other materials, and is widely used in ore-dressing .
Know MoreSpherical grinding media are predominantly used in final stages of ore grinding The spherical balls change shape through breakage and wear Though this is universal in , grinding Ball size distribution inside an industrial mill was analysed in terms of , Figure 44 Ball size distribution along the mill length .
Know MoreThe size of ore shall not exceed 65mm and the best feed size is under 6mm The effect in this job is better than coarse grinding Grid ball mill consists of the shell, feeding part, discharging part, main bearing, lubricating system, driving system and other parts
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