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SAGDesign Test | Starkey and Associates Inc.

The SAG mill pinion energy, W SDT (kWh/t) and SAG discharge Bond ball mill work index, S d-BWI (kWh/t), are then used to calculate the total energy to grind the ore from 80% passing 152 mm to 80% passing the client specified final product size P 80.This information, along with the ore specific gravity, is used to calculate necessary mill sizes and motor power in industrial applications.

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Method of assessing ball mill health - SAGMILLING.COM

The ball mill circuit specific energy consumption is 8.69 kWh/t = (14 354 ÷ 1651). Fines generation rate in the ball mill 556 t/h = (2270 × [0.403 – 0.158]). Plant mill grinding rate 54 kg/kWh = (556 × 1000 ÷ 14354 ÷ 0.7195). Laboratory mill grinding rate 57 kg/kWh = (1.258 ÷ [2.22×10-5] ÷ 1000).

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equipment to use to calculate KWh/t - Page 1 of 1

equipment to use to calculate KWh/t. 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.

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What is ball mill price? - Quora

Answer (1 of 2): Incomplete Question. Please allow me to ask few question, if you can answer them you will know the price without any difficulty: 1) Application of Ball Mill 2) Capacity of Ball Mill (in TPH or TPD) 3) What is the Work Index of Material to be ground (in kWh/T) 4) Feed Size of Mat...

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High-Efficiency Roller Mills | Industrial Efficiency ...

Traditionally, ball mills are used in cement industry for raw material, fuel and product grinding. Ball mills use an established technology and offer certain advantages. However, they have higher energy demands. By using an appropriate kind of the more efficient roller mill technologies – either as a replacement or in combination with ball mills – considerable energy savings can be ...

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Roller press install for pre-grinding before cement ball mill

The power consumption of cement pulverizing system with small capacity of pre-pulverizing section is still in the low level of 38 kWh/t or even above 40 kWh/t. In a word, the more work done in the ball mill section, the higher the grinding power consumption of cement grinding unit.

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Table of Bond Work Index by Minerals

This Table of Ball Mill Bond Work Index of Minerals is a summary as tested on 'around the world sample'. You can find the SG of each mineral samples on the other table. Source 1 Source 2 Source 3 Source 3 Source 4 Source 5 Source 6 Source 6 KWh/t Source 6; Avg Bond Work Index: kWh/t: kWh/t: kWh/sh.t: kWh/t: kWh/t: kWh/t: kWh/t: Range: No of ...

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Orway Mineral Consultants Canada Ltd. Mississauga, ON ...

BM = Ball mill specific energy from T 80 1.7 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

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OPTIONS FOR GRINDING SLAG AND POZZOLAN FOR USE AS ...

Disadvantages are the energy consumption in kWh/t of around 30-40 kWh/t for clinker, is typically louder than other comminution machines and may require longer downtime periods for maintenance. 4 Ball mills come in two compartments with ball charge size of around 50mm-90mm for grinding the coarser material and the second compartment containing ...

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GMSG GUIDELINE: DETERMINING THE BOND EFFICIENCY …

Test WI of circuit feed ore = 16.1 kWh/t (The Bond ball mill test Work Index of the ore, whichapplies over the size reduction range of this circuit) W = 3,150 kW / 450 t/h = 7.0 kWh/t . The circuit's Bond WI Ratio Eff. = 16.1 / 14.4 = 1.12, or 112% . This circuit is performing approximately 12% better than predicted

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A Method of C alculating Autogenous/ Semi-Autogenous ...

ball mill work index was averaging only 11.6 kWh/t, which is not hard. A rod mill work index fi gure was not found but was thought to be in the 16 kWh/t to 18 kWh/t range. The Xstrata Zinc 22 ft ID × 40 ft EGL over ow ball mill fl was installed at Mt Isa in 2009. This mill was put into single

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AMIT 135: Lesson 7 Ball Mills & Circuits – Mining Mill ...

Wet Ball Mill = kg kWh = 0.16(A i-0.015) 0.33; Dry Ball Mill = kg / kWh = 0.023A i 0.5; Replacement Ball Size. Rowland and Kjos proposed the use of their equation for the determination of the initial and replacement media size. Azzaroni (1981) and Dunn (1989) recommended the use of the following expression for the size of the makeup media:

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Do you know ball mill? - Quora

Answer (1 of 2): Cylindrical energy saving grid ball mill is one of energy saving mills developed by our company, which is easy to start and saves 20-30% energy. It is lined grooved ring plate which increases the contact surface of ball and ore and strengthens the grinding. In addition, the large...

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Starkey & Associates Inc. - Leaders in Comminution Design

SAGDesign testing provides SAG pinion energy grindability in kWh/t to within +/- 5% from 152 to 1.7 mm, and Bond Ball Mill Work Index on SAG ground ore, from the SAG test on the same sample. Starkey & Associates uses the patented SAGDesign technology to calculate accurate mill sizes from measurements on a client's own ore samples.

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ceat.okstate.edu

al ball mills; the bottom curve is obtained from the Attritor. As you can see, for specific energy input around 100 kwh/T, the median particle size achieved through the use of Attritors is nearly 1/2 smaller than that obtained from conventional ball mills, and is about 1/3 smaller than that obtained from vibratory mills.

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Vertical Roller Mills for Finish Grinding | Industrial ...

Ball mills, that are commonly used for finish grinding, have high energy demands, consuming up to 30-42 kWh/t clinker depending on the fineness of the cement. Complete replacement of ball mills by vertical roller mills (VRMs) with an integral separator – as opposed to the use of VRMs as pre-grinding to ball mills – is regarded as a breakthrough.

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Energy consideration in cement grinding

Example: material grindability & correlation with ball mill Evaluation of performance with help of Zeisel test Guiding values for the grindability of an OPC cement 95/5 are o 27-32 kWh/t at 3000 cm²/g acc. Blaine o 39-47 kWh/t at 4000 cm²/g acc. Blaine o 58-69 kWh/t at 5000 cm²/g acc. Blaine Energy consideration in cement grinding

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Optimization of mill performance by using

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 NON-REFEREED PAPER MARCH 2010 135 Table I Influence of speed and liner design on load dynamics

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Energy Use of Fine Grinding in Mineral Processing ...

12%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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Fine Grinding as Enabling Technology – The IsaMill

These features distinguish stirred mills as fundamentally different from both ball mills and Tower Mills, as demonstrated by Tables 1 and 2. Table 1 : Typical Power Intensities of different Grinding Devices Table 1: Power Intensity of Different Grinding Devices Ball Mill is a 5.6m D x 6.4m L @ 2.6MW Tower Mill is a 2.5m D x 2.5m L @ 520KW

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SIMPLIFIED BOND WORK INDEX DETERMINATION By: R. O ...

kwh/t to reduce a given material from theoretically infinite feed size to 80% passing 100 microns. The work index of a particular material is determined in the laboratory by conducting the standard Bond grindability test. Bond developed separate tests for the rod mill and the ball mill. The simplified test

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Best energy consumption

Plant 1 – Closed-circuit ball mill with third-generation. Plant 2 – CKP (closed circuit with third-generation separator) Plant 3 – Vertical mill (kWh/t cement) CPJ 35. 30.8. 29.8. 30.4. CPJ 45. 32.5. 30.3. 34.8. CPA (J) 55. 44.3 – –

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Ball mill media optimization - Metcom Tech

for all screen sizes from mill specific energy input (kWh/t) and mill feed and product size distributions (Hinde, 1999; McIvor and Finch, 2007; McIvor et al., 2017). These include the mill grinding rate through the size of interest, calculated independently as above. Media sizing Ball mill media optimization through functional performance modeling

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Grinding Mills - Blogger

where P80 and F80 are the 80% passing sizes of product and feed in microns, and Wi is expressed as kWh/t. The calculated power requirement is adjusted by utilizing efficiency factors dependent on the size of mill, size and type of media, type of grinding circuit, etc., to give the operating power requirement. ... Ball Mills: -The final stages ...

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Monday, February 12, 2007 (45). - Union Process

mills and about 33Z smaller than that obtained from vibratory ball mills. At a specific energy input above 200 kwh/t, the Attritor continued to grind into the derived from Attritor data. input of about 100 kwh/t, This figure clearly shows that for a specific energy the median particle size obtained through the use of

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Application of Operating Work Indices in Autogenous ...

AG/SAG Wio, AWio (kWh/t) 28.5 Ball Mill Wio, BWio 8.6 Circuit Wio, OWio 14.6 Bond Ball Mill Work Index, BWi, kWh/t 13.4 Bond Rod Mill Work Index, RWi, kWh/t 18.1 Table 1. Example of AG/SAG Ball Mill Circuit Wio Calculations [1] [2] ABstrAct Optimum use of power in grinding, both in terms of grinding efficiency and use of installed capital, can have

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(PDF) DESIGN AND OPERATION OF VERTIMILL® FOR SECONDARY ...

The operating work index for the overall circuit ranged from 14.6 kWh/t to 17.6 kWh/t. The Bond ball mill work index for the ore samples collected from surveys 3 and 4 was 17.2 and 18.7

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Teresa plant, the Philippines: cement grinding plant.

6.9 kWh/t for the mill only, and 11.2 kWh/t for the whole workshop, inclusive of weigh feeders, belt conveyors, bucket elevator, and transport to homo-silo. The Tula plant mills installed by FCB Horomill offer the unique opportunity of having identical mills for raw and cement grinding plant, allowing for only

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JME

is, the SAG mill produces about 10.76% 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 23.16 kWh/t and 36.05 kWh/t respectively. Thus, the ball mill consumes 12.89 kWh/t, more energy than the SAG mill in producing the final product. The

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20150505 Bond Efficiency-GMG-ICE-v1-r04 Determining the ...

(kWh/t) and WioACTis the Actual Operating Bond Work Index (kWh/t). • If the Wi Efficiency Ratio is 1.0 or , the circuit is per-forming with the same efficiency as the Bond Standard Circuit (and the ore Wi = circuit operating Wi), in accor-dance with the correlation that Bond (1962) established between plant operating data and test data ...

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SciELO - Brasil - Comminution circuits for compact ...

The CB and SABC routes had a similar energy consumption of 14.4 kWh/t and 14.5 kWh/t respectively. The energy consumption in the SSSAG route was lower than the ball mill consumption, 12.4 kWh/t, even with a new feed size without previous crushing in the SSSAG.

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Design of the 40 foot SAG Mill Installed at the Cadia Gold ...

SAG mill base power was estimated from pilot plant data at 7.8 kWh/t, the basis was a SABC circuit of 8% ball charge. Maximum SAG mill power was determined by deducting the installed ball mill pinion power of 7.95 kWh/t from the maximum overall circuit power of 16.7 kWh/t to give 8.75 kWh/t.

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ATTRITOR GRINDING AND DISPERSING EQUIPMENT by A. …

The top curve represents data from the vibratory ball mill; the middle two curves are obtained from the Attritor. As you can see, for specific energy input around 100 kwh/T, the median particle size achieved through the use of Attritors is nearly ½ smaller than that obtained from conventional ball mills…

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(PDF) Measurement of electrical energy consumption in a ...

The ball mill work index (kWh/t) is then calculated from Equation 6 . Mike Daniel - The Researcher W ho Rummaged Through Bond's Tool Box 11 . JKMRC International Conference 2006

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COMMINUTION CIRCUITS A SUMMARY OF ENERGY …

Bond ball mill work index, Wi kWh/t 13.55 Operating work index, Wi oACT kWh/t 15.40 Wi Efficiency Ratio % 88.0 REGRIND CIRCUIT PERFORMANCE The Eliason test mill at ALS Metallurgy was used to benchmark the grinding performance of the regrind ball mill and Vertimill. The Eliason mill measures an internal diameter of 4" and a height of 6" and has ...

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