Nov 21, 2014· (1) Rao Latchireddi, (1) Raj K Rajamani and (2)Sanjeeva Latchireddi (1) University of Utah, (2) EE-Mill Solution LLC, USA

Get PriceFigure 5 High–low wave ball mill liner Materials The selection of the material of construction is a function of the application, abrasivity of ore, size of mill, corrosion environment, size of balls, mill speed, etc liner design and material of construction are integral and cannot be chosen in isolation

Get PriceNov 01, 2006· The ball mill is initially uniformly filled with rocks and balls which are perfectly mixed Fig 3 shows the charge in the mill after 4 min of rotation (at 75% critical) The charge has been clipped by a vertical plane passing down through the center of the mill so that the internal distribution of ,

Get PriceHere I try to explain how ground slurry is discharged from a grate ball mill (or SAG) How it works is, the slurry flows across the grate as it would a screen panel On the other side of the grate/screens are veins like a pump impeller As the mill turns/rotates the slurry is “pumped” out and discharged Discharge Grates The natural flexibility of rubber has allowed rubber manufacturers to ,

Get Priceball mill grate discharge Grate-discharge Type The grate-discharge type of Ball Mill has a grate at the outlet of the shell and causes less excessive grinding, compared to the overflow type Therefore, generally, it is best suited to grind materials up to the particle sizes ranging from 60 to 100 mesh Compartment type

Get PriceA set of experimental test work has been carried out in a continuous pilot ball mill of 041m X 056 m (diameter X length) at different mill speeds, percent solids and discharge mechanism The results of study on material flow through a grate discharge tumbling mill verses an overflow tumbling mill are presented to emphasize the effect of ,

Get PriceJan 01, 2016· For over-flow ball mills the charge should not exceed 45% of the mill volume, 2 For grate discharge mills the charge should occupy about 50% of the mill volume Figure 73 illustrates a ball mill at rest charged with rocks and grinding balls Bond measured the height, ,

Get PriceWhat Is A Grate Discharge In A Ball Mill Classifying Grate Discharge Ball Mill Classifying Grate Discharge Ball Mill The ball mill is an overflow type discharge mill and is designed for a 45 ball charge Balls should be added on a regular basis as they are consumed in the mill The balls are added with a one ton ball bucket lifted by an overhead crane and discharged into the ball mill

Get PriceRotation of ball mill,is to use synchronous motor by coupling to make small gear rotate,and fixed on the cylindrical shell big gear to make cylinder rotateGrinding fine materials output with slurry by out-feed small holes on the board,out-feed end slurry surface is lower than middle spindle neck slurry effluent face,lower than low level,forced discharge

Get PriceThe ball mill can grind various ores and other materials either wet or dry There are two kinds of ball mill, grate type and overfall type due to different ways of discharging material

Get PriceGrate discharge Dry Grate discharge Wet Overflow discharge Wet Figure 85 Effect of mill filling on power draft for ball mills The data is taken from Rexnord Process Machinery Reference Manual, Rexnord Process Machinery Division, Milwaukee, 1976 The effect of varying mill speed on the power drawn by the mill is shown graphically in Figure 84

Get PriceThe SAG mill was designed to treat 2,065 t h −1 of ore at a ball charge of 8% volume, total filling of 25% volume, and an operating mill speed of 74% of critical The mill is fitted with 80 mm grates with total grate open area of 766 m 2 ( Hart et al, 2001 )

Get PriceClassifying Grate Discharge Ball Mill Classifying Grate Discharge Ball Mill The ball mill is an overflow type discharge mill and is designed for a 45 ball charge Balls should be added on a regular basis as they are consumed in the mill The balls are added with a one ton ball bucket lifted by an overhead crane and discharged into the ball mill

Get Price- The Blue Rooster where an approximate figure for the constant is 35 for rod mills 40 for overflow ball or pebble mills and 45 for grate discharge ball or pebble mills 231 is specific gravity of grinding media for rods or balls normally 785 q is the charge volume in fraction of mill volume 40 040 nc is the mill speed in fraction of

Get PriceFor overflow ball mills, the charge should not exceed 45% of the mill volume For grate discharge mills, the charge should occupy about 50% of the mill volume Bond developed a relationship that can be used to determine the percent charge by volume as a function of the vertical height above the charge, He, and the radius of the mill, R, ie,

Get PriceJul 03, 2012· Ball mills are also classified by the nature of the discharge They may be simple trunnion over-flow mills, operated in open or closed circuit, or grate discharge (low-level discharge) mills The latter type is fitted with discharge grates between the cylindrical mill body and the discharge trunnion

Get PriceA ball mill, a type of grinder, is a cylindrical device used in grinding (or mixing) materials like ores, chemicals, ceramic raw materials and paintsBall mills rotate around a horizontal axis, partially filled with the material to be ground plus the grinding medium Different materials are used as media, including ceramic balls, flint pebbles, and stainless steel balls

Get PricePulp lifters, also known, as pan lifters are an integral part of the majority of autogenous (AG), semi-autogenous (SAG) and grate discharge ball mills The performance of the pulp lifters in conjunction with grate design determines the ultimate flow capacity of these mills

Get PriceStresses, generated in the ball charge, increase, which may result in spalling of balls and blocking the grate discharge Optimization of mill performance by using online ball and pulp measurements by B Clermont* and B de Haas* Synopsis Ball mills are usually the largest consumers of energy within a mineral concentrator

Get PricePERANCANGAN BALL MILL TIPE GRATE DISCHARGE KAPASITAS 30 TON PERJAM SKRIPSI Diajukan Kepada Universitas Muhammadiyah Malang Untuk Memenuhi Syarat Memperoleh Gelar Sarjana (S-1) Teknik Mesin Disusun Oleh : Muhammad Falikh Nurin Nada 201310120311159 UNIVERSITAS MUHAMMADIYAH MALANG FAKULTAS TEKNIK

Get PriceThe grate ball mill is usually used in the first segment of the two stages, or place of discharging the rough ore Overflow Type Ball Mill 1 Cylinder 2,3 Cover end, 4 Main bearing 5,Hollow shaft 6 pinion 7 Big gear ring, 8 mineral feeding device, 9 Cone shape ,

Get PriceDifferent combinations of SAG mill ball charge and grate open area were tested until 2006 A higher load level was achieved after several changes in the grate design that prevented both liner and grate breakage Upon resolution of issues related to the mill grate design, the project achieved the target throughput of 41 kt/d Phoenix

Get PriceHorizontal Grinding Mill Overflow Type Grate discharge The ball mill is designed to grind materials by turning the cylindrical shell with grinding medium eG steel balls, cylpeb, and pebbles put in the shell, and has a simple structure and ease of handling furthermore, the ball mill of a large capacity has been available to a very extensive range of applications in both dry and wet processing

Get PriceSMALL C I W BALL MILL The CIW is a Small Ball Mill that’s belt driven, rigid bearing, wet grinding, trunnion or grate discharge type mill with friction clutch pulley and welded steel shell The 7 and 8 foot diameter mills are of flange ring construction with cut gears while all other sizes have cast tooth gears

Get PriceBulkbuy Large Capacity Grate Discharge Ball Mill with ISO Approval price comparison, get China Large Capacity Grate Discharge Ball Mill with ISO Approval price comparison from Grate Discharge Ball Mill, Grate Discharge Ball Mill Machine manufacturers & suppliers on Video Channel of Made-in-China

Get PriceBall mill is widely used in mineral ore processing, raw material preparation in refractory, ceramic and building material industri Over the years, we had kept optimizing the mill designs for different material processing at various circumstances, which gives us a unique advantage on reliability and competitiveness in dealing with a large range and variety of material grinding

Get PriceSep 01, 2016· The increased mill charge load will lead to an increase in mill power draw The onset point of overfilling an AG/SAG mill can be indicated when the mill power draw exceeds the safe operation power threshold In a ball mill, however, the mill power draw is dominated by ball media charge volume for a given mill rotational speed

Get PriceJun 23, 2020· Converting a ball mill from overflow to grate discharge involves installing a grate inside the mill at the discharge end The grate holds the balls inside the mill but allows the slurry to pass through, and it is then pumped out of the mill by the pulp lifters

Get PriceDry Mixed Mortar Plant Production Capacity: 200,000-500,000 tons per year Component Parts: Material storage tank, sand dryer, batching apparatus, mixer, dry powder packing machine, dust collector and conveyor Application Fields: To produce single component and multiple component mortar products such as dry-mixed mortar, water proof mortar, adhesive mortar, plaster anti-crack mortar and ,

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