foundation design criteria for sag mill and ball mill

foundation design criteria for sag mill and ball mill

foundation design criteria for sag mill and ball mill [ 49 6355 Ratings ] The Gulin product line, consisting of more than 30 machines, sets the standard for our industry We plan to help you meet your needs with our equipment, with our distribution and product support system, and the continual introduction and updating of products

Grinding Mill Foundations eandau

23092014· This means that SAG mill foundations behave very differently from ball mill foundations 4 – Mill Designer Stiffness Criteria One of the mill designers performs a calculation to determine the “target stiffness” of the foundations given the mill and ring motor stiffnesses We have noticed that this ends up at about 10 MN/mm for large drives We have pointed in another post that the Freeport 38 ft

Manual design of SAG/ball/rod mill foundations

14032007· We took one look at the foundation and permitted a modern SAG Mill to be installed on the old foundation With respect for what it was, it's not going anywhere, and will not be experiencing any vibration issues anytime soon My backoftheenvelope check gave me a natural frequency somewhere in the 0000X range With respect for the environment, the foundation should have only needed a

I have a bit of a long answer here, so I'll give you a synopsis: I don't think an design can be produced manually, and I think a preliminary desig1Youngstructural a star for you I have direct experience of a SAG mill with conflicting frequencies causing resonance and vibration problems I hav1See the documents on this page of my website /foundationshtml 1Thanks for that FOETS If you'll forgive the pun, I guess I've always been a bit sensitive to vibration problems*smiles* SlideRuleEra: GreaThanks, youngstructural always glad to hear that old information can be useful In the context of a study for a minerals processing plant worth in excess US$500m, a preliminary design (ie not FEM) approach to such a foundatioSorry for the late reply all; I was on vacation dbuzz: Please do not misunderstand this reply: I appologize in advance if it seems that I am attI think we have a case of 'the forest' and 'the trees' here youngstructural We'll have to agree to disagree on this one, but thanks for your inpu

Difference Between Sag Mill vs Ball Mill mech4study

Ball mill is a fine grinder A horizontal or vertical rotating cylinder which is filled partially with the balls of ceramics, small rocks and balls made from stainless steel The ball charge of a SAG mill is about 29% to 30% By friction and influence of tumbling balls inside rotating cylinder grinds the raw material to the required fineness The internal machinery of ball mill grinds the raw material into the powderlike

Sag Mill Foundations Forces acoengineeringpl

Ball mill foundations design criteria Design ball mill foundationdesign ball mill foundations design foundation of ball mill motor design foundation design mill design 8 weeks whether sag or ball mill space is a sensitive subject especially in the con plant design ball m design ballDetails Ball mill wikipedia 2 grinding mill foundations grinding mill foundationssep 23 2014 this means

(PDF) DYNAMIC DESIGN FOR GRINDING MILL

A practical case of ball mill foundation is examined herein The diameter of mill is 80 m with length of 131 m, operating at 12 rpm The height of mill shaft is 181 m above ground The weight

What's the Difference Between SAG Mill and Ball Mill

In order to effectively reduce the direct impact of materials on the ball mill feed bushing and improve the service life of the ball mill feed bushing, the feeding point of the groove in the feeding part of the ball mill must be as close to the side of the mill barrel as possible And because the ball mill feed grain size is larger, ball mill feeding groove must have a larger slope and height, so that feed smooth

What is the difference between a SAG mill and ball mill?

SAG is an acronym for semiautogenous grinding SAG mills are autogenous mills that also use grinding balls like a ball mill A SAG mill is usually a primary or first stage grinder SAG mills use a ball charge of 8 to 21% [6] [7] The largest SAG mill is 42′ (128m) in diameter, powered by a 28 MW (38,000 HP) motor [8] A SAG mill with a 44′ (134m) diameter and a power of 35 MW (47,000 HP) has been

Difference Between Sag Mill vs Ball Mill mech4study

Ball mill is a fine grinder A horizontal or vertical rotating cylinder which is filled partially with the balls of ceramics, small rocks and balls made from stainless steel The ball charge of a SAG mill is about 29% to 30% By friction and influence of tumbling balls inside rotating cylinder grinds the raw material to the required fineness The internal machinery of ball mill

Ball Mill Design/Power Calculation

The basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground, characteristics, Bond Work Index, bulk density, specific density, desired mill tonnage capacity DTPH, operating % solids or

SAG Mill Grinding Circuit Design 911metallurgist

Metallurgical ContentBall Charge Motion inside a SAG MillSAG Mill OperationSemi Autogenous Design FactorsSAG Mill Operation ExampleProcess Plant DescriptionSAG Mill Design and Specification Operating Problems Since CommissioningDesign Changes and Future Operating Strategies AG and SAG mills

AMIT 135: Lesson 7 Ball Mills & Circuits – Mining Mill

Ball Mill Design Parameters Size rated as diameter x length Feed System One hopper feed; Diameter 40 – 100 cm at 30 ° to 60 ° Top of feed hopper at least 15 meter above the center line of the mill Feeder Single or double helical scoop feeder or a spout feeder; Double helical feeders used in closedcircuit with classifiers

Ball Mill an overview | ScienceDirect Topics

3522 Ball Mills The ball mill accepts the SAG or AG mill product Ball mills give a controlled final grind and produce flotation feed of a uniform size Ball mills tumble iron or steel balls with the ore The balls are initially 5–10 cm diameter but gradually wear away as grinding of the ore proceeds The feed to ball mills (dry basis) is typically 75 vol% ore and 25% steel

SUPPLY, INSTALLATION, & COMMISSIONING OF THE WORLD

To achieve a satisfactory economic operation, large scale processing was required The selection of the mills, equal to the largest designed and operated at the time, gave a plant configuration consisting of two 36 ft x 19 ft (111 m x 58 m) SAG mills and three 20 ft x 30 ft (61 m x 91 m) ball mills

Ball mill Wikipedia

A ball mill is a type of grinder used to grind or blend materials for use in mineral dressing processes, paints, pyrotechnics, ceramics, and selective laser sintering It works on the principle of impact and attrition: size reduction is done by impact as the balls drop from near the top of the shell A ball mill consists of a hollow cylindrical shell rotating about its axis The axis of the shell may be either horizontal or at a small angle to the horizontal It is partially filled with balls

: Home

Sagmilling is home to a collection of both free and subscriptionbased calculation tools to aid metallurgical process engineers perform comminution calculations Grinding circuit design tools, including for SAG millball mill circuits, and geometallurgy energy models are available to subscribers The online library of technical articles contain

TECHNICAL NOTES 8 GRINDING R P King

LG A mill power equation for SAG mills Minerals and Metallurgical Processing Feb 1990 pp5762 Gross power No load power Net power drawn by the charge (813) The net power is calculated from Net power KD25L e! c/ Watts (814) In equation 814, D is the diameter inside the mill liners and Le is the effective length of the mill including the conical

SAG Conference 2023 : Home

As a distinctive and targeted conference, SAG 2023 provides a unique opportunity to gain visibility with industry insiders and operators alike Our title sponsorship opportunities provide the chance to position your company as a lead supporter in mineral processing and moving the comminution industry forward There are five levels of sponsorship: Platinum, Gold, Silver, Copper and Friend

AMIT 135: Lesson 7 Ball Mills & Circuits – Mining Mill

Ball Mill Design Parameters Size rated as diameter x length Feed System One hopper feed; Diameter 40 – 100 cm at 30 ° to 60 ° Top of feed hopper at least 15 meter above the center line of the mill Feeder Single or double helical scoop feeder or a spout feeder; Double helical feeders used in closedcircuit with classifiers

SUPPLY, INSTALLATION, & COMMISSIONING OF THE WORLD

To achieve a satisfactory economic operation, large scale processing was required The selection of the mills, equal to the largest designed and operated at the time, gave a plant configuration consisting of two 36 ft x 19 ft (111 m x 58 m) SAG mills and three 20 ft x 30 ft (61 m x 91 m) ball mills

Ball Mill an overview | ScienceDirect Topics

3522 Ball Mills The ball mill accepts the SAG or AG mill product Ball mills give a controlled final grind and produce flotation feed of a uniform size Ball mills tumble iron or steel balls with the ore The balls are initially 5–10 cm diameter but gradually wear away as grinding of the ore proceeds The feed to ball mills (dry basis) is typically 75 vol% ore and 25% steel

Modification of SAG mill liner shape based on 3D liner

16052009· The discharge of the SAG mill goes to a vibrating screen with the openings of 5 mm The oversize material is recycled to the SAG mill and the undersize is combined with the ball mill (671 × 991 m) discharge and is sent to the cyclones The SAG mill uses two 5500 hp synchronous motors and works with constant 105 rpm rotational speed in two directions Some important characteristics of this mill

FOUNDATIONS FOR INDUSTRIAL MACHINES AND EARTHQUAKE

aids/methodologies for foundation design Various issues related to mathematical modeling and interpretations of results are discussed at length Intricacies of designing vibration isolation system for heavyduty machines are also discussed Influences of dynamic characteristics of foundation elements, viz, beams, columns, and pedestals etc on the response of machine, along with some case

Ball Mills Mine

The point where the mill becomes a centrifuge is called the "Critical Speed", and ball mills usually operate at 65% to 75% of the critical speed Ball Mills are generally used to grind material 1/4 inch and finer, down to the particle size of 20 to 75 microns To achieve a reasonable efficiency with ball mills, they must be operated in a closed system, with oversize material continuously being recirculated back into the mill

: tools

: tools Mill Critical Speed Calculation Estimates the critical speed of a grinding mill of a given diameter given the mill inside diameter and liner thickness If given a measured mill rotation (RPM), then the mill`s fraction of the critical speed is given Internet Slide Rule

SAG Conference 2023 : Home

As a distinctive and targeted conference, SAG 2023 provides a unique opportunity to gain visibility with industry insiders and operators alike Our title sponsorship opportunities provide the chance to position your company as a lead supporter in mineral processing and moving the comminution industry forward There are five levels of sponsorship: Platinum, Gold, Silver, Copper and Friend

SmartMill Grinding | ABB

It can be applied to new or existing AG, SAG and ball mills, powered by either ringgeared mill drives (RMD) or gearless mill drives (GMD) This solution was designed to control, stabilize and optimize mill operation The technology supporting this solution enables accurate, consistent and tireless application of your optimal control strategy at all times Similar to an autopilot, Expert Optimizer automatically regulates mill

WIND TURBINE DESIGN AND IMPLEMENTATION

i Abstract This project examined the design of a land‐based wind turbine considering various alternatives including soil and foundation type, turbine size and type, tower design, type of site, and wind speeds