ROCLINK 800 Configuration Software - Vinson Process
Configure and view I/O points, flow calculations, PID control loops, system parameters, and power management functions. View and print event and alarm logs. Perform five-point calibration on dual and multi-variable sensor inputs, and analog inputs. Implement user security. Create and edit graphical displays that contain live data.
SAGMILLING .:. Articles
An updated data set for sag mill power model calibration This paper expands the SAG mill survey database published by the Author at Procemin 2013. The new database includes 49 published SAG/AG mill surveys and includes mills from all over the world.
Estimated Water Requirements for the Conventional ...
water usage. The crushed ore is transferred to a semiautogenous (SAG) mill or ball mill where the ore is further reduced in size. Water is added to the ball mill, in which a slurry that usually contains from about 20 to 55 percent solids is produced (Singh, 2010; International Mining, 2011) (see fig. 2). The
Minding the Grind: Maintenance Options to Keep SAG Mills ...
This tool, according to RME, is suitable for larger mills. Each unit requires a Thunderbolt Power Pack to supply the electrical and hydraulic needs of the hammer and powered suspension options. The hammer can operate with any standard three-phase supply (380, 415, 480, 525, 575 or 600 volts at 50 or 60 Hz).
Energy Use of Fine Grinding in Mineral Processing ...
This quantity is small 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 installed power for a SAG mill can go up to 25 MW. However, the energy used for fine grinding is still significant.
THE COMMINUTION CIRCUIT DESIGN FOR THE CONSTANCIA …
mill work index 11.4 kWh/t and an average RQD of 44%. RQD values of 25% resulted in a SAG mill feed size (F80) between 55 and 60 mm and throughputs of 6200 t/h. RQD values of 55% resulted in SAG mill feed size (F80) of over 70 mm and a SAG mill throughput of 5200 t/h. The Batu Hijau SAG mill specific energy was a function of point load test and ...
The engineering and process effects of choosing a motor ...
The SAG mill power draw model of Austin (using the cali-bration by Doll, 2013) is used to predict the process power draw at the mill shell, Pshell, and the efficiency losses for the drive's mechanical components based on Doll (2012) are used to determine the motor output power, P. The effect of varying the mill speed as a fraction of the critical
SAG Mill Grinding Circuit Design - 911metallurgist
As such, it exposes the circuit to risk in terms of failing to meet throughput targets if insufficient SAG power is installed. Rather than design the …
Analytics-driven smart sourcing and procurement of ...
Power requirements of the mill • Income from scrap sales E = 10 X Wi (1/ P80 - 1/ F80 ) E = 10 X Wi (1/√P80 - 1/√F80 ) Wear rate of the balls To calculate the wear rate of the balls, the team first calculated the mill's filling of the grinding media. With this, the number of balls present inside the mill was deduced.
RELIABILITY OF SOME ORE CHARACTERIZATION TESTS
SMCC Test (Morrell, 2004) 31.5 5 Single particle / No AG / SAG mills SAG Design Test (Starkey et al., 2006) F80 = 152 10 Batch / No AG / SAG mills MacPherson Test (MacPherson and Turner, 1978) 32 100 Continuous / Yes AG / SAG mills SAG Power Index (SPI) (Starkey and Dobby, 1996) 19 5 Batch / No AG / SAG mills
Download spreadsheets for calculating F, B*, C* values of ...
Introduction . DSFT has an extensive range of free-On Line resources for undertaking a wide range of thermal process calculations including dry heat sterilisation (F H) and depyrogenation (F D or F P).This page provides access to a range of Microsoft Excel spreadsheets that can be downloaded for a small donation and will work on a PC or Mac without access to the Internet.
Polycorp - Innovations
Mill liner challenges can be overcome to improve mill availability and throughput with Polycorp's specialized product design support and mill power calculations. By studying the liner configurations, our experienced engineers can optimize the power in the mill.
Electricity bill calculator | Energy cost calculator
Electricity bill calculation Energy consumption calculation. The energy E in kilowatt-hours (kWh) per day is equal to the power P in watts (W) times number of usage hours per day t divided by 1000 watts per kilowatt: E (kWh/day) = P (W) × t (h/day) / …
TECHNICAL NOTES 8 GRINDING R. P. King
LG A mill power equation for SAG mills. Minerals and Metallurgical Processing. Feb 1990 pp57-62. Gross power No load power Net power drawn by the charge (8.13) The net power is calculated from Net power KD2.5L e! c./ Watts (8.14) In equation 8.14, D is the diameter inside the mill liners and Le is the effective length of the mill including the ...
A Method of C alculating Autogenous/ Semi-Autogenous ...
of the energy required by a SAG mill. Put another way, the SAG mill energy required according to this statement, is 2.5 times more than the Ab value to produce the same degree of particle breakage. There is a speci fi c gravity factor that affects AG/SAG power draw. The lighter material, in the 2.5 specifi c gravity (SG)
A simple estimation method of materials handling specific ...
a SAG mill plant, risking a skewed analysis of the operating costs, benefiting the HPGR option. One of the ancillary systems that may be overlooked is the more complicated conveying systems ... Conventional conveyor power draw calculations are complicated. ... such benefits would apply to the capital cost). Conventional conveyor power draw can ...
Relationship between SAG mill power draw, bearing pressure ...
A clear example is the work of Hadizadeh et al. (2017), who classified the mill power draw and bearings pressure in levels such as very low, low, good, high, and very high. Between levels, a ...
AMIT 135: Lesson 6 Grinding Circuit – Mining Mill …
Scale-up criterion is the net specific power consumption, i.e. the power consumed by the mill rotor itself minus all mechanical and electrical losses divided by the feed rate of solids. For the full scale mill, specific power is multiplied by the feed rate to get the net mill power.
Modelling SAG milling power and specific energy ...
the SAG mill critical speed; Pc = SAG mill power consumption (kW); % 600 +100 = % of the fresh feed in the size range 152 +25 mm. M. Silva, A. Casali/Minerals Engineering 70 (2015) 156–161 157 In fact the later can be modelled as a function of the others.
What's the Difference Between SAG Mill and Ball Mill ...
The biggest characteristic of the sag mill is that the crushing ratio is large. The particle size of the materials to be ground is 300 ~ 400mm, sometimes even larger, and the minimum particle size of the materials to be discharged can reach 0.1 mm. The calculation shows that the crushing ratio can reach 3000 ~ 4000, while the ball mill's ...
GROSS POWER CALCULATOR - SMC Testing
calculations by the user. If the mill has cone ends the model automatically calculates the volume of the ... the model from grate to overflow when predicting the power draw of an AG/SAG mill. 4 Figure 1 – Measured vs Predicted Motor Input Power . 0 2000 4000 6000 8000 10000 12000 14000 16000 18000
USING THE SMC TEST® TO PREDICT COMMINUTION …
AG/SAG mill and crusher circuit simulations through the use of JKSimMet. Independent of this it can be used in power-based calculations, which in conjunction with the Bond ball work index test, enable the prediction of the specific energy of comminution circuits where such circuits include combinations of any of the following equipment:
AMIT 135: Lesson 5 Crushing – Mining Mill Operator Training
Calculation of reduction ratio in crushing [image: (135-5-3)] Crushing Equipment The selection of the right crushing equipment is influenced by many factors some of which are upstream of the crushing plant (e.g. blasting pattern and mining method) and others which are downstream of the crushing plant (e.g. mill and grinding circuit selection).
OSTI.GOV Technical Report: IMPROVING ENERGY EFFICIENCY VIA ...
By December 2004 Cortez Mines realized that the SAG mill is drawing approximately 236-kW less power than before while maintaining the same level of production. In the first month there was extreme cycling and operators had to learn more. Now the power consumption is 0.3-1.3 kWh/ton lower than before. The actual SAG mill power draw is 230 …
GrindingExpert™ - WordPress
Our SAG mill strategies automatically adjust feed rate, mill speed ... increase tonnage . We maintain desired operating conditions by constantly monitoring bearing pressure, mill power, recycle pebbles, mill density, charge toe and mill acoustics, ... and calculations and filters are performed every 30 seconds.
A mill power equation for SAG mills | SpringerLink
where m p is in kW; D is internal mill diameter (meters), L is internal mill length (meters); J is total fractional charge loading of the mill; J B is the fractional mill filling by balls; ε B is the effective porosity of the charge, taken as 0.3; ρ s and ρ b are true densities of rock and balls (tons per cubic meter), respectively; w c is the weight fraction of rock in water and rock in ...
Mining - Grinding and Processing | WEG
Grinding and processing. WEG offers the most reliable and efficient solutions for milling plants for ferrous and non-ferrous products with their experience of mill drive systems. In the heart of a processing plant, the ball and SAG mills must be driven by solutions that adapt to the characteristics of the minerals in line with the whole process.
Face Milling Calculators • Force, Torque, and Power
Calculated Required Power. F t Tangential cutting force: lb N. T Torque at the cutter: Nm in.-lb ft-lb Nmm. Machining Power. P s at the cutter: (HPc) KW. P m at the motor: hp KW. These calculations are based upon theoretical values and are only intended for planning purposes. Actual results will vary. No responsibility from Kennametal is assumed.
AG - Autogenous & SAG Semi-Autogenous Mill Design …
Mill Power required at pinionshaft = (240 x 16.5 x 1.025) ÷ 0.746 = 5440 Hp Speed reducer efficiency: 98% 5440 Hp ÷ 0.98 = 5550 HP (required …
OSTI.GOV Technical Report: Improving Energy Efficiency Via ...
Depending on the mill size the SAG mills draws between 2 MW and 17 MW. The product from the SAG mill is further reduced in size using pebble crushers and ball mills. Hence, typical gold or copper ore requires between 2.0 and 7.5 kWh per ton of …