Machine Learning and Deep Learning Methods in Mining

Semi-autogenous grinding mills play a critical role in the processing stage of many mining operations. They are also one of the most intensive energy consumers of the entire process. Current forecasting techniques of energy consumption base their inferences on feeding ore mineralogical features, SAG dimensions, and operational variables. …

Optimal Speed Control for a Semi-Autogenous Mill Based on

A SAG mill has low speed and heavy load, which cause the energy consumption of grinding operation to be very high. It accounts for a large proportion of the electrical consumption across the plant . The rotation speed is an important factor related to the operation and grinding efficiency of the mill. Under the traditional operating …

Comparison of Ore Hardness Measurements for Grinding Mill …

size F80 of 152 mm to 80% passing 1.7 mm, and a simple adjustment procedure in case the SAG product size needed to be adjusted. Bond rod and ball mill work indices are readily converted to pinion energy for rod and ball mills but not for SAG mills. Reproducibility, while not studied in this paper is clearly a part of the meaningfulness of …

SAG Circuit Design

Unfortunately I have a program for SAG mills and grinding circuits. Computational testing showed that: - Capacity of SAG Mills can increase to 10000 t/h. - The number of ball mills should be 2-4. - The capacity of the SAG mill with pre-crushing by 20-30% more than the SAG mill with the crashing critical size.

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

Analysis of typical SAG mill installations in the copper industry indicates that typically less than 90% of installed motor power is used on average. Therefore, the installed SAG motor power was determined to be 9.72 kWh/t (8.75/90%). Checks were carried out to ensure that the SAG mill could utilise this power within a reasonable envelope of ...

sag mills leachabilities

· In this work, a high-energy planetary mill was used to modify the chemical stability of indium-bearing zinc ferrite (indium-bearing ZnFe2O4, IBZF) and improve indium and zinc leachabilities. The microstructures, morphologies, and leaching characteristics of IBZF samples milled under different milling conditions were investigated by particle ...

FL to supply ball mills, SAG mills and thickener solutions to

The equipment includes two gearless SAG mills and two gearless ball mills plus three CCD thickeners, two tailings thickeners and one filtrate thickener. "This is a welcomed order as it underlines our leading position in the copper and gold mining arena when it comes to productivity and throughput. The order for SAG mills, ball mills and ...

Condor Gold accelerates La India development with Outotec SAG

The SAG mill has a mill diameter of 24 ft (7.3 m) and an effective grinding length of 18.5 ft and a structural charge mass of 315 t, Condor Gold said. The structural design ball charge is 11% with a structural design load volume of 35%. Specific gravity of the material is 2.55. The structural steel liner mass is 240 t; however, with the use of ...

Energies | Free Full-Text | Operation Analysis of a SAG Mill under

As one of the machines widely used in mining, a semi-autogenous grinding (SAG) mill can significantly improve the roughing efficiency of rock. But the SAG mill still faces the obstacles of significant energy consumption and empirical operation parameters. In order to obtain the optimal operation parameters of a SAG mill, in this paper, the …

Slurry pooling and transport issues in SAG mills

Medium aspect mills are common in Australia, with aspect ratios between 1.2 and 1.5. Techniques of detecting slurry pooling are presented in Powell et al. (2001). In essence the slurry level should be just below the charge level Low aspect mills are common in South Africa and Scandinavia, The after a crash stop.

Improving Energy Efficiency Via Optimized Charge Motion and …

@article{osti_922135, title = {Improving Energy Efficiency Via Optimized Charge Motion and Slurry Flow in Plant Scale Sag Mills}, author = {Rajamani, Raj K}, abstractNote = {A research team from the University of Utah is working to make inroads into saving energy in these SAG mills. In 2003, Industries of the Future Program of the …

Autogenous and Semi-Autogenous Mills

The SAG mill had a 6–8% ball charge and the power consumption was 8 kWh/t, which agreed well with the expected value. 9.6. Problems. 9.1. In an SAG mill the dimensions of the mill were 9.75 m × 3.5 m and the specific gravities of the mineral and that of the balls charged were 4.1 and 7.9, respectively.

Investigations on Indium and Zinc Leachabilities from Indium

In this work, a high-energy planetary mill was used to modify the chemical stability of indium-bearing zinc ferrite (indium-bearing ZnFe 2 O 4, IBZF) and improve indium and zinc leachabilities.The microstructures, morphologies, and leaching characteristics of IBZF samples milled under different milling conditions were investigated by particle size …

Sag Mill Liner Design

> Mill throughput and efficiency gains are iterative over time > Mill trajectory modelling based on bar heights, angles, spacing and speed is very predictive > Field trials are the acid test - operator, designer and vendor > Optimisation strategy: – Maximise impact grinding AG/SAG mills – Avoid impact on the shell rather the toe of the charge

Mount Milligan mill drives

SAG mill and two 26 ft ball mills, all made by . The drive systems that enable the mills to operate at benchmark levels of reliability, efficiency and availability were made by ABB, whose solution comprises a 23.5 MW gearless mill drive (GMD) for the SAG mill, and two 13 MW low-speed dual-pinion ring-geared mill drive (RMD) systems for the ...

SAG Mill | Autogenous and Semi-Autogenous …

Easily find the perfect fit from our wide range of sizes. Depend on years of proven reliability and productivity. Products. Maximise the productivity of your operation with durable high-efficiency Semi Autogenous Mill (SAG mill) and Autogenous Mill (AG Mill).

Comminution power – geared versus gearless

Bordi comments: "As Nick says, the market is currently very comfortable with 40 ft SAG mills, but there is space to grow. Outotec has previously designed and delivered a 42 ft mill, but it is unfortunately …

Differences in Properties between Pebbles and Raw Ore from a SAG Mill

Semi-autogenous (SAG) mills are widely used grinding equipment, but some ore with critical particle sizes cannot be effectively processed by SAG mills and turned into pebbles. This research aims to analyze and compare the properties of raw ore and pebbles from a zinc- and tin-bearing ore. The results show that the contents of sphalerite, …

Mill drive selection for semiautogenous grinding mills

Early SAG mill designs using gear drives were limited in the amount of power that could be applied to the pin-ions, 3.7 MPa (5000 hp). The exception to this design was the Hibbing taconite operation. It used two4.47 MPa (6000 hp) motors to drive a 1I-m-diam x 4.5-m long (36-ft-diam x 15 ft) autogenous mill. However, recent SAG mill designs now ...

BrainWave: Control solutions for SAG mills

BrainWave SAG mill is a unique control package using patented model-based predictive adaptive control technology. It is well known within the mining industry that effective grinding in a SAG mill depends largely on the loading of the mill. A mill con - taining too much material does not allow for adequate movement of the ore and balls within ...

THE APPROPRIATENESS OF THE TRANSFER SIZE IN …

will become the predictions. In the case of SAB/SABC circuits the transfer size is the product of the SAG mill circuit and the feed of the ball mill circuit. Hence if power-based equations such as eq. 1 and eq. 2 are to be used to predict the SAG mill circuit and ball mill circuit specific energies it is important to ascertain:

IMPROVING ENERGY EFFICIENCY VIA OPTIMIZED CHARGE MOTION …

A research team from the University of Utah is working to make inroads into saving energy in these SAG mills. In 2003, Industries of the Future Program of the Department of Energy tasked the University of Utah team to build a partnership between the University and the mining industry for the specific purpose of reducing energy …

Acoustic Sensing and Supervised Machine Learning for In …

can improve and optimise SAG mill grinding performances via real-time monitoring technology [15]. In addition, the measurement of vibration-acoustic emission signals has emerged as a promising tool to understand the state of the mill (AG/SAG mill and ball mills) [16–28]. Notwithstanding, more accurate and precise prediction is a …

Grinding Mills | Mineral Processing Equipment | CITIC HIC

High cost-effectiveness CITIC HIC grinding mills are recognized as China's Manufacturing Industry Single Champion Product. CITIC HIC is responsible for setting the national standards of semi-autogenous mills (SAG mills) and ball mils, supported by powerful database, optimized process technology, cutting-edge design concept, and 60 years of …

Three factors that determine the wear life and performance of …

Mills require different liner profiles and designs depending on mill size, speed, charge, charge level, type, size of grinding media, expected service life, and – of course – ore size and properties, such as hardness and abrasiveness. SAG mill A SAG mill is usually a primary mill for grinding coarse ore directly from the crushed stockpile.

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