How to decide the grinding ball size for SAG mill – ZJH …
some mining company adopt SAG mill grinding copper ore. the feeding size is less than 250mm, the discharged product size is less than 12.5mm. At first stage, they load diameter 125mm, 100mm and 75mm balls totally 100t, the capacity is only 220t/h.
Metallurgists & Mineral Processing Engineers
911 Metallurgist can enter the scene and see what you have become blind to. We can fix issues in ways you never thought possible. Our fresh eyes will open new opportunities for your plant. Each mineral processing plant …
YANACOCHA GOLD SINGLE STAGE SAG MILL DESIGN, …
single stage SAG mill at Minera Yanacocha's Gold Mill facility located in northern Peru. The Gold Mill was commissioned in March 2008 with a 32' x 32' EGL, 16.5MW single stage SAG mill, to ...
CONGA: THE WORLD'S FIRST 42 FOOT DIAMETER 28 …
1 CONGA: THE WORLD'S FIRST 42 FOOT DIAMETER 28 MW GEARLESS SAG MILL T. Orser1, V. Svalbonas 2 and *M. Van de Vijfeijken 3 1Newmont Mining Corporation 10101 East Dry Creek Road Englewood, CO 80112, USA 2 Corp. 2715 Pleasant Valley Rd.
Interaction effects of flotation reagents for SAG mill reject of copper
— Trans. Nonferrous Met. Soc. China 31(2021) 792âˆ'806 Interaction effects of flotation reagents for SAG mill reject of copper sulphide ore using response surface methodology Ali AHMADI, Mojtaba REZAEI, Seyed Mohammad SADEGHIEH Department of Mining Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran …
A Comprehensive Guide to SAG Mill Operation
A SAG mill is used to grind and crush large pieces of rock into smaller pieces of rock, gravel, or dust. It is commonly used in the mining industry. Q2. How does a SAG mill work? A SAG mill uses a combination of impact and attrition to grind the material. The grinding media in a SAG mill are larger than in a ball mill, and there are fewer of ...
Pre-Processing to Increase the Capacity of SAG Mill
circuit by further crushing 35% of SAG mill fresh feed. Such figures would represent yearly additions of 8.3 kt in copper and 250 kg in gold productions.
-Sossego mill process flowchart (Source: Rosa et al., 2007)
Sossego mill processes 41,000 tons of copper ore per day and its design capacity is around 470,000 tons/year of copper concentrate. Figure 1 shows the process flowchart. The Sossego mill circuit ...
Understanding the SAG Mill in Copper Ore Mining …
SAG mills have proven to be efficient and reliable machines for grinding copper ore in the mining industry. They are a critical component of the processing circuit and play a significant role in achieving optimal product …
Keys to best practice comminution
— In this example the SAGDesign (SDT) ore hardness is 10 kWh/t (to grind the ore from F 80 152 mm to T 80 1.7 mm) and the SAG ground Bond Ball Mill Work Index is 15 kWh/t. Table 2 shows alternate equipment selections that will produce 471 t/h, (10,400 t/d and 3.8 million tonnes per annum) at 92% availability.
Choosing a SAG Mill to Achieve Design Performance
— the correct power required to grind ore in a SAG mill, by developing ore hardness variability functions for the ore body to be mined. This paper describes the next step in the SAG design ... This data is indicative of trends that were happening in the 3-ft. diameter SAG pilot mill. They have not been proven in large commercial scale mills ...
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.
SABC Grinding Circuit
— Frood-Stobie Mill could be shut down and only the dewatering and filtration facilities at Copper Cliff Mill would remain active. Pilot Plant Studies Bench scale tests and pilot plant campaigns were conducted to design a flowsheet and size equipment for a primary grinding circuit to handle 24,000 t.p.d.of ore.
Replacement of Wet Ball Milling with High-Pressure Grinding …
— In response to the Natural Resources Canada "Crush It Challenge," Corem partnered with the University of British Columbia and led a project to develop and demonstrate the use of high-pressure grinding to replace the workhorse of the industry, wet ball milling. Two plant case studies, a small tonnage gold recovery operation and a large …
Design SAG mill production when you need it most: In …
Representative sample: The only ore blend a SAG mill will never see. Critical size: Ore component that is harder than the mill has power to grind at the specified rate. When a SAG mill is too small, pebble crushing allows the critical size to be eliminated and throughput is increased. Conversely, critical size pebbles occur when hard ore
PNG GEOLOGY, EXPLORATION AND MINING …
from its 30 ooot capacity stockpile by a single Nico 11.7m by 2.4m apron feeder. The minus 250mm feed is milled in a two-stage grinding circuit, being fed into a 9.7m diameter by 4.7m SAG mill at a rate of approximately 2000tph. SAG mill discharge is sized at 6mm by an Allis-challllers 3.7m by 8.5m low-head vibrating screen fitted with
The copper ore dressing plant adopts semi-autogenous …
1. Reduce the feed size of the SAG mill: By optimizing the blasting parameters and adjusting the size of the crusher discharge port, the feed size of the SAG mill was …
SAG Mill Grinding Circuit Design
The design of large mills has become increasingly more complicated as the size has increased and there is little doubt that without sophisticated design procedures such as the use of the Finite Element method the required factors of safety would make large mills prohibitively expensive. In the past the design of small mills, u…
Semi Autogenous Grinding Mill
A SAG mill of diameter 9.0 m and width 6.0 m was charged to 40% of the mill volume with ore of SG 3.2 when the porosity was 38%. With grinding time the ball load changed from 10% to 5% and the bed porosity to 12%.
Grinding Mills | Mineral Processing Equipment | CITIC HIC
3. The maximum ball loading capacity of AG mill is calculated at 3% of effective mill volume, while the SAG mill with ball loading capacity at 15% of mill volume. 4. The operating speed is usually 75% of critical speed of mill, the variable frequency speed regulation is ideally somewhere between 5% to 10% of rated speed.
How to Control a SAG Grinding Mill Circuit
— The installed power in the primary mill is generally much greater than in conventional circuits. Since the semiautogenous or autogenous mill is dependent at least in part, if not entirely, on the ore to grind itself, a small change in ore grinding characteristics can produce a relatively large change in the grinding capacity of the mill.
Design of the 40 foot SAG Mill Installed at the Cadia …
SAG Mill Dimensions: The SAG mill was designed for monzonite ore, with allowance in the mine schedule for reduced throughput when treating the harder volcanics. The latter forms -8% of the orebody and have the potential to reduce7 throughput by up to 30% if treated by themselves, while maintaining the same grinding circuit product size. Speed ...
Semi Autogenous Grinding (SAG) Mill For Sale, Sag Mining
The filling rate of steel ball in the shell of the semi-autogenous mill is a main item to distinguish SAG mill and autogenous mill. In order to eliminate the impact of the accumulation of rock, the autogenous mill allows to add about 3% of the ball (Φ80 ~ Φ120), SAG mill steel ball filling is generally 8% ~ 12%, even up to 15%.
How to Control a SAG Grinding Mill Circuit
— If the critical size is above 13 mm, it will build up in the primary mill circuit filling the primary mill with ore too fine to be effective as grinding media but too coarse to …
Benefits from the development of site-specific SAG mill …
— "Several new large copper and gold concentrators have been built and commissioned around the world in the past five to eight years. The success of the ramp-up from these very large concentrators has varied. CITIC SMCC Process Technology was engaged to assist some of these mines by gaining a better understanding of the factors …
Simulating the Impact of Ore Competence Variability on …
— There are numerous examples in the literature, some of which are quantifying the effect of Mine to Mill Grundstrom et al, 2001;Hart et al, 2001;Scott et al, 2002;Burger et al, 2006;Jankovic et al ...
THE APPROPRIATENESS OF THE TRANSFER SIZE IN …
an operating SABC circuit and a SAG mill closed with large diameter cyclones feeding a closed circuit ball ... 2. what the appropriate T80 value should be for a given ore type, circuit configuration, mill geometry and operating condition 10 100 0.01 0.1 1 10 100 1000 ... Example of a Closed Circuit SAG Mill Cyclone Overflow and a Ball Mill ...
How to Process Copper Ore: Beneficiation Methods and Equipment
— Then the crushed materials are sent to the grinding equipment, and the final particle size of the copper ore is reduced to 0.15-0.2mm. Copper ore crushing process 1. Beneficiation methods of copper sulfide ore Copper sulfide can be divided into single copper ore, copper sulfur ore, copper-molybdenum deposit, copper nickel, carrollite and so on.
SAG Mill | Autogenous and Semi-Autogenous …
Rely on our proven track record of AG and SAG Mill superiority. Since the early 1980s, we have been designing and manufacturing Semi Autogenous Mill (SAG Mill) and Autogenous Mill (AG Mill) under the Fuller-Traylor …
INCREASING SAG MILL CAPACITY AT THE COPPER …
INCREASING SAG MILL CAPACITY AT THE COPPER MOUNTAIN MINE THROUGH THE ADDITION OF A PRE-CRUSHING CIRCUIT . Dave Rose. 1; David G. Meadows2; Mike Westendorf3 . 1 Global Director, Commissioning and Optimization, FL USA Inc. 7158 S FL Dr. Midvale, UT USA 84047 . 2Vice-President, Global Process Technology, …
Ore Dressing Methods
— In this bulletin the subject of ore dressing is approached from the economic rather than from the technological standpoint, and the supporting data have been compiled with a view to their bearing upon the economic exploitation of ore deposits. Results obtained are stressed rather than the details of processes and the physics and chemistry …
OneMine | Increasing Sag Mill Capacity at the Copper …
— Over time, a major initiative that involved blasting and fragmentation, optimization of the SAG mill in terms of discharge grates, ball size and slurry density, …
Φ11×6.4m SAG Mill Liners For Zijin Mining Group
The Φ11×6.4m SAG mill liners manufactured by our company for Duobaoshan copper mine of Zijin Mining Group was installed and operated on December 11, 2020 and dismantled on May 10, 2021. ... 2021. The total operation time is 148 days, which is 24% higher than the expected service life of 120 days. The total ore handling capacity of the liner ...
Paper # 25
Table 1 includes the technical data for the Copper Mountain SAG mill. Table 1 - general SAG mill data Specification Data Mill size 10.363 M [34 feet] diameter by 6.096 M [20 feet] long Mill type Wet grinding, grate discharge Mill drive motor size 17,000 HP Mill drive motor type Synchronous 200 RPM Inside diameter 10,363 mm Length 6,096 mm