SAG Semi-Autogenous Grinding T Circuit tonnage (metric t/h) W Specific energy (work) input (kWh/t) Wi Bond Work Index (kWh/t) WiBM Bond Ball Mill Test Work Index (kWh/t) Wic Bond Impact Crushing Test Work Index (kWh/t) WioACT Actual Operating Bond Work Index ... assume 2.44 m diameter overflow mills, and use a rod mill F80 of 16,000 µm and a ...

Mill Sizing: After laboratory and pilot plant testing confirm the feasibility of autogenous or semi-autogenous grinding, it can be used to establish the exact grinding circuit and mill size.In the pilot plant tests, the tare power of …

AUTOGENOUS MILL FEED PREPARATION TO REDUCE UNIT ENERGY CONSUMPTION ... mill through-put and increases the unit power consumption expressed as kWh per tonne of mill feed. Media rock ... The initial ball charge consisted of a graded charge and new balls added were 127 mm in diameter. The mill rotated at 25.26 rpm or 76.6% of critical speed.

to the 8,54 m diameter by 4,12 m long dDminion semi­ autogenous grinding mill .on an 1 828 mm belt CDnveYDr. The mill is driven by tWD 3 000-HP motors through gear reducers resulting in a total connected hDrsepDwer .of 6000. Semi-autDgenous mill speed is 10,7 rpm, .or 73% COMPUTER CONTROL AT BENGUET CORPORATION, PHILIPPINES 27

A mill is a device that breaks solid materials into smaller pieces by grinding, crushing, or cutting. Such comminution is an important unit operation in many processes.There are many different types of mills and many types of materials processed in them. Historically mills were powered by hand or by animals (e.g., via a hand crank), working animal (e.g., horse mill), wind or water ().

Advanced Simulation for Semi-Autogenous Mill Systems: A Simplified Models Approach 149 For large-scale mills, the pulp discharge flow can be determined by combining equations (4) and (5) as follows: m Q d= J (8) The calculation procedure can be transformed in …

Power per ton of circuit product favors the shorter mill by a substantial margin in Series 1 and 2, and by a small margin in Series 3. The average of all three tests gives a short mill power of 9.5 KWH per ton compared with 11.35 KWH per ton for the longer mill circuit.

Ball Mill Capacity In Tons Per Hr Jr. Tons per hour ball mill elpicador fr autogenous ball mill minimum capacity tons per hour 1000 tons capacity ball mill for gold ore 2 ton per hour rock mill 200 to 300 mesh 1000 tons capacity ball 5 tonne per hour ball mill Mine Equipments In this page you can find crusher jaw crusher Impact crusher CS series cone crusher vertical

(kWh/tonne); for grinding from ... mills from small diameter drill core samples. Miner ... semi-autogenous (SAG) and ball mill circuits are used to show …

FAG Mill Specification 9.75m diameter vessel/drum 2 x 3.5MW, fixed speed, induction motors per mill ROM grinding @ 750 tons per hour (no balls/rods) Rotating in both clock and anti-clockwise directions Mono-block mill liners made-up of high chrome material Fed with 3 x variable speed vibrating feeders

Some dry autogenous mills operating in Canada are 8.5 m in diameter and 1.5 m in length. These are known as Aerofall mills. The Cadia Hill (Australia) wet SAG mill is 12.2 m in diameter with a 20 MW motor and in 2004 was the largest …

Autogenous mills, or AG mills, can accomplish the same size reduction work as two or three stages of crushing and screening. Often used in grinding at modern mineral processing plants, AG mills reduce the material directly to the desired final …

performance of a large diameter sag mill is shown in ... the mill power consumption decreased from 8.4 to 5.16 kWh/t ... The original grinding circuit consisted only of …

diameter dry mill, was developed for this purpose, ... autogenous mill, with an 8% ball charge and controlled by sound at 25% mill charge level. ... gross autogenous index is greater than 10.0 kWh/st, because the MacPherson mill becomes less efficient as the ore becomes harder.

-- Power, W; B- kWh/ton -75pan; A._ -75 ~tm, kg. SCALE-UP The 0.6m diameter mill has proved to be a very convenient size for batch test-work on autogenous grinding. Special batch tests in 1.8m and 0.6m diameter mills were arranged using waste rock from a gold mine, to check the effect of scale-up on grinding rate and power efficiency.

This measurement is expressed in kilowatt-hour per ton (kWh/t), ... BRMWI is used to design semi-autogenous mills using semi-experimental relationships [24]. In designing and ... the core's height to diameter ratio is between 2.5 and 3 and the minimum core diameter is 54 mm. The Brazilian tensile strength test was ...

Allis-Chalmers has a proprietary equation, adapted from the kilowatt hours per ton of balls (Kwb) equation for calculating ball mill power published by Bond, to determine the power which an autogenous mill or semi-autogenous mill will draw under specified conditions or ore specific gravity, pulp density in mill, mill speed and volumetric loading.

A survey of Australian processing plants revealed a maximum ball mill diameter of 5.24 meters and length of 8.84 meters (Morrell, 1996). Autogenous mills range up to 12 meters in diameter. The length-to-diameter ratios in the previous table are for normal applications. For primary grinding, the ratio could vary between 1:1and 1.8:1.

an 8 m diameter SAG mill with LID = 0.5 grinding a copper ore, and predicted maximum capacity and minimum kWh/ton at about 6070 ball load at 25070 total filling. Two FAG mills of LID = 2 were necessary to give the same capacity, and the simulations indicated a lower kWh/ton for these mills. For this ore, both systems were technically feasible.

Semi-Autogenous Mill Note the size of the mill: Why does the diameter need to be so big? [image: (135-6-2)] ... (Wi, normally expressed in kWh/ short ton). Other established methods, for instance Hardgrove Index, population balance. Scale Up in Sizing for Grinding Mills.

K A constant, 350 for wet overflow mills, etc. WI Bond test Work Index, kWh/short ton. SG Ore specific gravity. Cs Mill speed in percent of critical. ID Mill inside (liners, working) diameter, feet. It pre-dated (semi-)autogenous grinding, and needs to be adjusted for those applications. Other guides (e.g. Azzaroni,

Autogenous Mill Diameter Ton Kwh. Kwhton mass flowrate thr feed moisture SAG mill solid percent mill load cell weight t and inlet m3 hr and outlet water m3hr to the SAG mill are measured for modeling SAG mill power kW Structure of …

Autogenous ball mill minimum capacity tons per hourutogenous mill diameter ton kwh autogenous mill diameter ton kwh mill grinding wikiwand autogenous mill diameter ton kwh,ball mills are characterized by their smaller comparatively diameter and longer length, and often have a length 15 to 25 times the.

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 a large effect on profitability. Mill operators have long used operating ...