Trunnion magnet aids chromite production
An
Eriez Magnetics Europe product story
Edited by the Engineeringtalk editorial team
Jun 4, 2009
An Eriez trunnion magnetic separator has been utilised by Outokumpu Tornio Works in an effort to improve chromite concentrate production in the Kemi Mine.
The Eriez trunnion magnet is used for the automatic separation and removal of processing balls and ferrous chips from milled ore in ball or SAG mills.
Typically, the system consists of a permanent magnetic arc that partially covers a rotating blind trunnion positioned at the ball or SAG mill discharge.
The milled ore is fed into the trunnion, capturing the ball chip fragments that are held by the magnetic arc.
The fragments are then released at the top of the trunnion barrel where the magnetic arc terminates, and are discharged into a collection hopper on the inside.
The trunnion magnetic separator at Kemi replaced the existing ball mill grate and costly trommel screen system, which were being continually 'blinded' (blocked) by cement and steel fibres in the shotcrete used in the underground mining facility.
The frequent blockages not only reduced efficiency levels in the grinding circuit but also resulted in prolonged downtime (16 production hours lost every month) while the ball mill underwent extensive cleaning to remove the impurities.
Weighing 455kg and with an outside diameter measuring 770mm, the 914mm-long Outokumpu trunnion magnetic separator consists of a 12mm-thick stainless-steel barrel complete with rubber lining.
As the discharge slurry (top feed size 4mm) passes through the magnet barrel at a volumetric rate of 60m3/h, the chips are attracted to combined rare earth and barium ferrite magnets arranged in a 200deg permanent magnetic arc, to be discharged into the collection hopper.
The Eriez system is credited with preventing ball chips from circulating through the sump pump and hydrocyclones, resulting in a more efficient, finer media grind while prolonging the lifespan of these parts.
Costs and on-going maintenance have been reduced as downstream machinery is protected, and milling throughput has increased.
Eriez trunnion magnetic separators offer efficient, energy-saving benefits and protect costly equipment such as pumps and hydrocyclones, while increasing milling throughput by as much as five per cent.
They reduce the iron fouling of downstream processes such as flotation and CIP, and eliminate the need for more expensive trommel screen systems.
Not what you're looking for? Search the site.
Contact Eriez Magnetics Europe
Tel +44 29 2086 8501
Other Eriez Magnetics Europe stories
-
Spymet tracks up to 20 metal pieces simultaneously
The Spymet metal locator from Eriez Magnetics Europe is an accessory to a metal detector system and is used to track and locate tramp metal on a conveyor belt. -
Eriez to exhibit magnetic drum separator
Eriez Magnetics Europe will launch the Inox Srex - a strong permanent magnetic drum separator - at the Recycling and Waste Management Exhibition, from 15 to 17 September at the NEC in Birmingham. -
Eriez to showcase magnetic separators at Recover
Eriez Magnetics is to showcase its magnetic separators and a self-cleaning version of the Model CP suspended overband CP magnets at the Recover: Irish Recycling and Waste Management show. -
Granular material supplier attracted by magnets
Magnets, metal detector and detector ancillaries are helping a leading supplier of building industry granular materials to achieve high quality, effective and safe processing of its marine aggregates. -
Recycling plant attracted by magnetic separation
Magnetic separation system facilitates the separation of cans from plastic bottle waste at recycling plant in Skegness, Lincolnshire.
Browse by category
-
Capital Equipment (3,420)
- Capital Equipment (1)
- Compressors and Air Treatment (518)
- Electrical hardware (131)
- Electronics Manufacturing, Tools, Instruments (192)
- Machinery and Production Equipment (1,106)
- Manufacturing Machinery and Plant Equipment (468)
- Production line blowers and fans (64)
- Robotics, Handling and Storage (940)
- Consultancy and Services (909)
-
Control and Instrumentation (5,064)
- Cabling, Conduit, Signal Conditioning (807)
- CNC and Motion Controllers (187)
- Control and Instrumentation (2)
- HMIs/Operator Interfaces (295)
- Logic Controllers, Timers and Relays (96)
- Mid-range and Large PLCs (202)
- Plant- and Machine-Wide Communications (1,183)
- Plantwide control (1,335)
- Power Supplies, Uninterruptible Power (569)
- Smaller-Sized PLCs (388)
-
Drives, Motors and Controls (3,394)
- Drives, Motors and Controls (1)
- Industrial Drives/Controls (1,283)
- Industrial Motors (500)
- Linear Drives and Motors (115)
- Precision Motors and Gears (419)
- Stepper and Servo Drives, Motors, Controls (1,074)
-
Electrical and Electronic Equipment Design (4,206)
- Batteries, chargers and circuit protection (558)
- Connectors, Terminals, Busbars, Slip Rings (693)
- Electrical and Electronic Components (635)
- Electrical and Electronic Equipment Design (1)
- Electrical and Electronic Subassemblies (371)
- Enclosures and Equipment Cooling Fans (713)
- Knobs, Handles and Enclosure Hardware (425)
- PCs and Embedded Systems (810)
-
Engineering Design Software (6,228)
- 2D CAD software (201)
- 3D CAD software (1,162)
- CAM, CNC, production management software (571)
- Data, document management software (313)
- Electrical design software (165)
- Engineering Design Software (15)
- FEA and structural analysis software (374)
- File conversion software, data capture (355)
- Fluid, thermal, noise, vibration software (334)
- Materials design and moulding design software (152)
- Maths, charting, statistics, QA software (318)
- PLM and collaboration software (652)
- Process, instrumentation, automation software (260)
- Publishing and documentation software (230)
- Rendering, visualisation, styling software (201)
- Simulation, modelling, validation software (925)
-
Engineering Industry News, Resources (6,128)
- Electronic Resources for Engineers (278)
- Engineering Business News, Views (388)
- Engineering Conferences (430)
- Engineering Education, Resources, Standards (844)
- Engineering Exhibitions, Events (566)
- Engineering Guides, Newsletters (354)
- Engineering Industry Developments, Awards (635)
- Engineering Industry News, Resources (4)
- Engineering Industry Reports, Surveys (597)
- Engineering Recruitment, Employment (219)
- Engineering Seminars (403)
- Engineering Training Courses (441)
- Health and Safety Consultancy, Software (175)
- Health and Safety Events, Training, News (278)
- Health and Safety Legislation (402)
- Health and Safety Strategy, Risk Assessment (114)
- Machine Building (4,564)
-
Materials and Processing (2,986)
- Materials and components (2,233)
- Materials and Processing (5)
- Materials processing and testing (288)
- Rapid Prototyping (460)
-
Monitoring, Measurement and Quality (5,527)
- Data Acquisition Hardware and PC I/O Boards (479)
- Data acquisition Software and Communications (498)
- Data loggers (421)
- Electrical and Electronic Testing, PAT Equipment (635)
- Form/co-ordinate, optical, vision instruments (730)
- Gauges, Indicators and Instruments (445)
- Materials testing equipment (420)
- Monitoring, Measurement and Quality (1)
- Telecomms/network test equipment, software etc (156)
- Testing and Calibration Services and Information (508)
- Testing, analysing and monitoring equipment (1,234)
-
Powertrain Design (3,646)
- Bearings (956)
- Chains and belts (329)
- Gears, brakes, couplings and engines (1,455)
- Hydraulic Components (473)
- Lubricants (430)
- Powertrain Design (2)
-
Sensors (7,142)
- Accelerometers and Vibration Sensors (432)
- Barcode Sensors (103)
- Flowmeters and Flow Sensors (621)
- Gas, Chemical, Radiation, Magnetic Sensors (286)
- Humidity and Environmental Sensors (155)
- Level Sensors and Leak Detectors (529)
- Linear Position Sensors (408)
- Loadcells, Force Sensors, Torque Sensors (711)
- Pressure sensors (625)
- Proximity Sensors (708)
- Rotary Position, Tilt and Angular Sensors (551)
- Sensors (8)
- Temperature sensors (613)
- Vision and Colour Sensors (1,392)
- Small Mechanical Components, Joining, Tools (1,987)
- Valves, Pumps, Process Hardware (3,655)
