sag mill feed size distribution manufacturer Grasping strong production capability, advanced research strength and excellent service, Shanghai sag mill feed size distribution supplier create the value and bring values to all of customers.
WhatsApp)
SAG specific power range of about 3 to 9 kWh/t for this site. The design of the ore stockpiling and conveying system contributes to fluctuating size distribution with significant shortterm segregation occurring under certain operating situations. Depending on ore type and feed size distribution, each SAG mill will process between 700 and 3000 tph.
respect with SAG mills being increasingly less sensitive as the ball charge is increased (Morrel S and Valery W, 2001). EFFECT OF FEED SIZE DISTRIBUTION ON SAG MILLING The qualitative effect of changes in particle size distributions (PSD) on the SAG mill performance can be addressed by using the grind curves.
Secondary mill feed – Continuous regulation capability gate to allow controlled distribution of feed between the two ball mills. Finally, if the amount of critical size material removed from the mill is less than the crusher and secondary mills capacities, those mills can also be fed with a small fraction of the SAG mill trommel undersize in ...
SAG mill itself and not on the test work program. Stated another way, money invested in a large SAG mill is an investment that can produce handsome returns if extra production is needed or simply to give the mine the option to mill the hardest ores at design throughput rates.
xG is the mill feed d80, not the circuit feed. For SAG mill, the xG value has to be determined by scalping of the full size distribution. The particles larger than the minimum pebble size (given by the pebble extraction grate opening) has to be excluded from the distribution to calculate the top ball size!
For a given circuit makeup size distribution, g i, the value of C and the mill feed size distribution, f i are not known and appear as results of the simulation. In order to circumvent this, both sides of the mill .
Changes in both the size distribution (f80) and hardness (work index) of the feed are the most important disturbances affecting SAG mill behaviour. Size distribution can be measured using image analysis techniques and used as a feedforward signal for improving load control.
F 80, µm is the 80% passing size of the fresh feed to the circuit (expected to be a Bondcompatible size distribution). P 80, µm is the 80% passing size of the circuit product (expected to be a Bondcompatible size distribution). Availability, expressed as a decimal ( = 90% availability) is used to convert t/h to t/d. Ball mill Operating ...
stage ball mills, rod mills or AG/SAG mills when calculating power according to the Bond Third Theory method. Rod mill and AG/SAG mill products are similar and tend to be not as steep as a slope when plotted on loglog paper. This is because the particle size distribution (PSD), these mills
sieving the material is the most accurate method of determining the size distribution of the ag/sag mill feed. However, fluctuations in feed size
A implemented at the Sossego SAG mill, briefly described as follows. SPLIT online size distribution analyzer was later installed at the SAG mill feed conveyor. All these actions resulted in a much more controlled First Generation size distribution of primary crusher discharge. Table 3 shows the results obtained during May 2006.
parameters used by the AG/SAG mill model in JKSimMet which permits prediction of the product size distribution and the power draw of the AG/SAG mill for a given feed size distribution and feed rate. In 0 10 20 30 40 50 60 70 80 90 100 0 1 2 3 4) Ecs (kWh/t) Weighted Fit 63 x 53 45 x x x 19 16 x
changes to feed size distribution through modification to blasting practices and primary crusher operation – socalled MinetoMill approach. MinetoMill The feed size to AG and SAG mill circuits has been demonstrated to have a significant impact on throughput with effects such a that illustrated in Figure 7, being commonplace. Modifying
operation fluctuations. To sample SAG mill fresh feed, belt conveyor was stopped and a sample was taken by removing material over a twometer length. Operating condition during sampling was recorded. Particle Size distribution of all samples except mill fresh feed and scats reject was determined using 6730 to 38 µm screens.
distribution affects the SAG mill load and the load affects directly the mill power and the efficiency of the mill operation (Van Nierop and Moys, 2001). If a SAG mill has been designed with a conventional power or specific energy model which do not consider the projected feed size distribution it is likely that this mill
Feb 12, 2018· The capacity of the SAG mill is related to lots of factors such as feed size, size distribution, discharge size and grindability, etc., and it should be confirmed according to the actual situation. SM40*14''——means it is a dry mill.
1 IMPROVEMENTS IN SAG MILL THROUGHPUT FROM FINER FEED SIZE AT THE NEWMONT AHAFO OPERATION *Adrian Dance1, Sonny Mwansa2, Walter Valery 2, George Amonoo3 and Bryon Bisiaux3 1SRK Consulting (Canada) Inc 22nd Floor, 1066 West .
We describe here one of the very first pioneering SAG Mill Feed Particle Size Analysers: A set of preliminary experiments was carried out in order to assess the hardwaresoftware''s behaviour. Static ore was used to obtain the right sequence of image processing algorithms. The camera was installed 3 mts away from the commercial sizer over the feed conveyor of the SAG Mill.
The ROM ore size distribution is a function of the geotechnical properties (fracture frequency and Rock Quality Designation (RQD)). Hence, the feed size to the SAG mill is a function of rock competency (Axb) and rock fracture. Burger, McCaffery, McGaffin, Jankovic, Valery, .
Two new SAG milling models are developed in this work, able to predict power or specific energy consumption, including the usual design variables such as mill size; balls charge level, solids concentration in the SAG mill feed and % of critical speed, but adding a variable that represents the feed size distribution.
USING THE SMC TEST® TO PREDICT COMMINUTION CIRCUIT PERFORMANCE INTRODUCTION As the SMC Test ® produces the JK parameter values A and b as well as estimates the JK parameter ta and crusher model energy matrices, the SMC Test ® can be used to conduct AG/SAG mill and crusher circuit simulations through the use of JKSimMet. Independent
AG/SAG mill product that needs additional grinding in the ball mill, or "Corrected Ball Mill Feed." T2'' is the 80% passing dimension of the Corrected Ball Mill Feed. Figure 1. Comparison of the Particle Size Distribution Slopes Figure 2. Relationship Between the Transfer Size Distribution Slope and T 80 or AWi0/BWi Figure 3.
operating their mill. Factors such as mill speed, mill inlet water, feed size distribution, and ore hardness all have an influence on the grindcurve, and form an integral part of the optimisation process. Test work has been conducted at a number of sites to develop grindcurves for different mills treating a .
In addition, the size distribution and grinding circuit chemistry may impact on the performance of the downstream circuit (Lane, 1999 and Rantanen, 1996). Fully autogenous circuits are attractive due to the elimination of steel media costs. Typically, a SAG mill based circuit (P80 of 106 to 150 um) has media costs of around A1/t.
WhatsApp)
Online Chat
Sales Hotline