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is, the SAG mill produces about % more than the ball mill in the final product. The average consumed energy at SAG and ball mills to produce one ton of final product was kWh/t and kWh/t respectively. Thus, the ball mill consumes kWh/t, more energy than the SAG mill in producing the final product. The
The mill product can either be finished size ready for processing, or an intermediate size ready for final grinding in a rod mill, ball mill or pebble mill. AG/SAG mills can accomplish the same size reduction work as two or three stages of crushing and screening, a rod mill, and some or all of the work of a ball mill.
breakage rate using the perfect mixing ball mill model but it does not take into account the mill''s power. That variable is introduced in the speci fi c breakage rate, expressed in t/kWh (Bazin, 2008a).
For example, grinding a pyrite concentrate so that 80% of the particles are less than 12 µm ( mm) consumes over 120 kilowatthours per tonne (kWh/t) of ore in a ball mill using 9 mm balls, but only 40 kWh/t in an IsaMill using a 2 mm grinding medium.
The "SCSE" Parameter Enhancing the Usefulness of ... laboratory ball mill work index can be used to compare the grindability of different ores in ball . 4 ... used as the input to a power based equation to predict the kWh/t of a SAG mill circuit. If the ore is
SPECIFIC COMMINUTION ENERGY General ... Semiautogenous (SAG), rod and ball mills. As well as the total specific energy it will also predict the specific energy of the crushing section, the HPGR section and the tumbling mill section ... Predicted (kWh/t) 5
Calculation of energy required for grinding in a ball mill. Int. J. Miner. Process., 25: 4146. The Bond work index, Wi, as an indicator of the grindability of raw materials is not a material constant but rather it changes with change of size of the grinding product.
1 MultiCompartment Rod/Ball Mill Evaluation on Bauxite Operation Ana Soares and Júlio Almeida , Brazil ABSTRACT In mineral processing operations, the grinding circuit is a key step in the process to achieve the
5,5 and 6 h in the ball mill and then further grinding the slip in the MaxxMill to the sieve residues of 6,4 % and 5,5 % over 45 µm resulted in a total energy consumption of 16,9 kWh/t and 17,9 kWh/t, respectively, as compared with 27,8 kWh/t when the ball mill alone was .
Plant 3 – Vertical mill (kWh/t cement) CPJ 35. CPJ 45. ... For ball mills, ball charge level, lining and diaphragm condition must be monitored and maintained in nearoptimum condition. Mill stops, defined as mill motor off, and measured by mean time between failures (mtbf), are frequently poorly recorded and the ...
The energy efficiency of ball mills for use in finish grinding is relatively low, consuming up to 3042 kWh/ton clinker depending on the fineness of the cement (Cembureau, 1997;Marchal, 1997).
A Bond ball mill work index is then performed on the mill product for the design of SAGball mill circuits. This is important because it was found that there was a 1– kWh/t higher ball mill work index if the – mm ball mill test feed size is obtained by SAG mill grinding compared with crushing.
secondary crusher specific energy consumption kWh/t assume product size 35 mm; power draw backcalculates to 763 t/h × = 305 kW (45% of available power) ball mill throughput 734 t/h (use this as overall throughput at % availability) HPGR specific energy consumption, E HPGR = kWh/t
kwh t ball mill ball mill kw calculator Grinding Mill China. Super Orion Ball Mill SO Ball mill for (kWh/t) bA ta Mixed 1414 » Learn More. Mill We can calculate the steel charge volume of a ball or rod mill and >>Chat Online; MODELING THE SPECIFIC GRINDING ENERGY AND BALLMILL
Sep 06, 2016· equipment to use to calculate KWh/t. Good day, What pieces of equipment should i use to calculate KWh/t. My grinding system has a roll press, ball mill and separator. Should i used: 1. Just the ball mill, roll press, separator, separator fan and ball mill fan. 2. All in 1 above including elevators. 3. include everything in the system. Reply
BM = Ball mill specific energy from T 80 mm to final product P 80, using Bond''s Law, (kWh/t) W T = Total grinding mill circuit specific energy (kWh/t) Note that K BM is the composite of EF3, EF4 and EF5 factors for ball milling (Rowland, 1982). Morrell and SMCC Morrell (2004) developed a methodology for predicting specific energy with
IsaMill Wikipedia, the free encyclopedia In contrast, ball mills, rod mills and other tumbling mills are only partially filled by ...(kWh/t) of ore in a ball mill using 9 mm balls, but only 40 kWh/t in an IsaMill ...
Power drawn by ball, semiautogenous and autogenous mills A simplified picture of the mill load is shown in Figure Ad this can be used to establish the essential features of a model for mill power. The torque required to turn the mill is given by Torque T Mcgdc T f () Where Mc is the total mass of the charge in the mill and Tf is ...
Every 100 cm²/g increase in cement fineness increases the mill power consumption by 12 kWh/t for a closed circuit mill 23 kWh/t for an open circuit mill, a sheer waste if this is not required by the market! 20 25 30 35 40 45 50 55 60 2500 3000 3500 4000 4500 5000 Open circuit kWh/t Closed circuit kWh/t
Jan 07, 2015· Specific power consumption for clinker/gypsum grinding in a ball mill should be approximately: 3000 cm2 /g kWh/t 3200 cm2 /g kWh/t 3400 cm2 /g kWh/t 3600 cm2 /g kWh/t 3800 cm2 /g kWh/t 4000 cm2 /g kWh/t Note: The specific power demand of large grinding units is 1015% better than that of small mills. ...
Where W = Net power consumption in kWh/t Wi = Bond work index (either Imperial or Metric units) P = The 80% passing size of the ground product in µm F = The 80% passing size of the feed in µm . The test is a closed circuit dry grindability test performed in a standard ball mill.
SAG Mill. Grinding Solutions offers the following tests for SAG mill testing and/or sizing. JKTech Drop Weight. The JKTech DropWeight Test measures the breakage characteristics of an ore for five size fractions in the range of 13 to 63 mm, at various energy inputs ( to kWh/t).
difference up to 10% on the energy (kWh/T) for a similar grind. Optimization of mill performance by using online ball and pulp measurements J o u r n a l P a p e r The Journal of The Southern African Institute of Mining and Metallurgy VOLUME 110 NONREFEREED PAPER MARCH 2010 135 Table I Influence of speed and liner design on load dynamics
Dec 18, 2013· where W is the specific grinding energy (kWh/t), W i is the Bond ball mill work index (kWh/t), F80 is the feed 80 pct passing size (μm), and P80 is the product 80 pct passing size (μm). It can be seen that in the regime in which the Bond equation is valid, energy use increases exponentially as product size decreases with constant feed size ...
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