Ball Mill Very large tonnages can be ground with these ball mills because they are very effective material handling devic Ball mills are rated by power rather than capacity Today, the largest ball mill in operation is 853 m diameter and 1341 m long with a corresponding motor power of 22 MW (Toromocho, private communications) ,
Get PriceAdvanced simulation for semi-autogenous mill systems has been presented in the context of a simplified models approach that incorporated developments of (Magne et al, 1995) and Morrell (Morrell ,
Get PriceAn Autogenous Milling defined as used in this study, the term Autogenous milling means a process in which the size of the constituent pieces of a supply of rock is reduced in a tumbling mill ,
Get PricePerhaps the concepts could be developed to treat large tonnages of lower value materials? , In 1991 the introduction of a Netzsch laboratory stirred mill to the Mount Isa site was a turning point in fine-grinding and ultrafine grinding , This rapid increase in capacity can be compared to autogenous milling technology which although ,
Get PriceSandMax VSI Crushers -- General Application Guidelin REMco VSI SandMax crushers are fully autogenous vertical shaft impact crushers designed to operate as third or fourth stage crushers in the processing of all types of rock, ores, and minerals SandMax crushers can be operated in either open-circuit or closed-circuit Closed-circuit
Get PriceAutogenous-mill, screen, pebble- mill classification circuits are used to grind - ore without the use of steel g r i n d i n g m e d i a The character of the ore must be such that it will grind autogenously Run-of-mine material or primary crusher product is fed to an autogenous grinding mill
Get PriceThey often make up 60-70% of total mill operating costs Picking the proper crushing and grinding method must, therefore, be done with great care, so the best circuit is chosen In the past 10 years, there has been a strong trend toward using autogenous or semiautogenous grinding in ,
Get Pricemaximum tonnages of an autogenous mill The finer you crush, the higher your ball mill tonnage and capacity will be processes versus autogenous milling can now be more accurately made that the current method of running crushing plants at maximum capacity Get Price
Get PriceJan 01, 2009· Later-on, larger mill sizes and larger processed tonnages have led to operations at 10–14% level Current practice in many plants calls for levels of 13–15% It must be kept in mind that the design conditions of the mill have considered a given ball weight in the internal load, which defines the structural characteristics of the mill and ,
Get PriceThe single-stage autogenous grinding (AG) or semi-autogenous grinding (SAG) mill is a low-cost option for milling relatively low tonnag Such circuits consist of an AG or SAG mill that is fed directly from a primary crusher, and the mill product is then classified through a hydrocyclone (or
Get PriceOur horisontal mill product offering includes: Autogenous (AG) & semi-autogenous (SAG) mills ; Ball mills ; Rod mills ; FT mills ; Rotary scrubbers In the ever-increasing quest for reduced mineral processing costs and increased throughput tonnages, there has been a worldwide move towards larger and larger mill siz
Get PriceApr 25, 2013· tions, the feed tonnages to fine grinding circuits are small compared to head tonnages, typically 10 to 30 tph However, the specific energies are often much larger , compared to the power used by a semi-autogenous mill and a ball mill in a primary grinding circuit; a ball mill can have an installed power of up to 15 MW, while
Get PriceAutogenous mills are available for both wet and dry grinding The diameter of autogenous mills is normally two to three times the length The ore charge is usually 25 to 35% of the mill volumeAutogenous mills have grate discharges to retain the coarse grinding media in the mill
Get PriceBall Mill for Sale APPROXIMATE CAPACITIES All ball mills operate on the same principl One of these principle is that the total weight of the charge in the mill-the sum of the weight of the grinding media, the weight of the material to be ground, and any water in the mill—is a function of the percentage of the volume of the mill it occupi
Get Pricegrinding mill for copper mine in macedonia grinding mill for copper mine in macedonia In the everincreasing quest for reduced mineral processing costs and increased throughput tonnages there has been a worldwide move towards larger and larger mill sizes As such has supplied some of the world’s largest horisontal grinding mills with ball mills up to 28ft in diameter 22MW and ,
Get PriceMar 05, 2020· The financial results for LIORC in 2019 benefited from higher iron ore prices and increased sales tonnag , was 7% lower than the corresponding period of 2018 as a result of a derailment of an automated train and unscheduled autogenous mill repairs and tailings flume repairs The IOC saleable production (CFS plus pellets) of 179 million ,
Get PriceFigure 5 Single Ball Mill Figure 6 SAG Mill (semi-autogenous) followed by Secondary Ball Mill Until recently, the majority of classifiers used in the closing of base metals grinding circuits have been hydrocyclones of varying models and installation methods These include vertical, horizontal and inclined installations, with varying materials of
Get PriceAug 25, 2014· At the tonnages of modern operations and with the gross amount of energy that must be transferred, the key issue is always going to be wear Autogenous processes have a future Non-autogenous processes do not I just recently worked with an operation using VSI crushers (shoe and anvil type) that were going through wear parts in less than a ,
Get PriceSAG is an acronym for semi-autogenous grinding SAG mills are autogenous mills that also use grinding balls like a ball mill A SAG mill is usually a primary or first stage grinder SAG mills use a ball charge of 8 to 21% The largest SAG mill is 42' (128m) in ,
Get PriceAnnually, large tonnages of ferrous grinding media are consumed around the globe, costing several million dollars2 Highly abrasive ores, such as those in the gold industry, can consume about 1 to 2 kg of grinding media per ton of ore milled3 As a result, grinding media replenishment is one of the highest above-the-ground consumable cost for ,
Get PriceA semi-autogenous mill handles 100 000 tons of hard rock per month – 80 000 tons from the open pit and 20 000 tons from underground miningÊ In addition, a ball mill handles a similar tonnage of sand The mine’s carbon-in-pulp plant recovers gold from the milled hard rock, while its extended and modified carbon-in-leach circuits treats the ,
Get PriceAUTOGENOUS GRINDING MILL 8 Sheets-Sheet 5 Original Filed Oct 9 1962 Oct 8, 1968 A R M PHERSON ETAL 3,404,345 AUTOGENOUS GR INDING MILL Original Filed Oct 9, 1962 8 Sheets-Sheet 4 Parker 5 (ii/fer Oct 8, 1968 A R MaCPHERSON ETAL 3, AUTOGENOUS GR INDING MILL Original Filed Oct 9, 1962 8 Sheets-Sheet 5 IITOPNEYJ'
Get PriceSep 01, 2020· 1 Introduction Nowadays, with the increasing depletion of high grade and coarse-grained ores, the trend is towards the extraction of low-grade ores This can have two consequences for the minerals industry; first to process larger tonnages of mineral raw material and second to grind the raw materials to finer sizes , which in turn leads to higher energy consumption
Get PriceThe ball mill measures 82 x 14 m in terms of power—transmitted by mechanical gear drives—it is considered one of the world s largest if not actually the world s largest horizontal mill driven by two Siemens type 1RR5108-6FA90-Z three-phase asynchronous motors with slip ring rotors delivering an output of 9 MW each
Get Priceunscheduled autogenous mill repairs and tailings flume repairs The IOC saleable production (CFS plus pellets) of 179 million tonnes in 2019 was 18% higher than saleable production of 152 million tonnes in 2018, but slightly below the lower end of Rio Tinto’s revised guidance of 182 to 193 million tonn
Get PriceThe financial results for LIORC in 2019 benefited from higher iron ore prices and increased sales tonnag , derailment of an automated train and unscheduled autogenous mill repairs and ,
Get PriceA rock breakage test has been developed that can help predict autogenous (AG) and semi-autogenous (SAG) mill performance in situations where only limited quantities of rock samples are available
Get PriceMill (OED Mill) is a large grinding mill solution , pressures driving the need to process higher tonnages and improve processing efficiencies, high-throughput , fully autogenous grinding circuit can reduce oxidation of sulfide minerals and the impact on slurry redox potential
Get PriceThe Outotec® Open Ended Discharge Grinding Mill (OED Mill) is a large grinding mill solution that enables innovative and efficient high capacity circuit designs through the removal of pulp lifters from the discharge arrangement This facilitates significant reductions in both CAPEX and OPEX
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