INSPECTION and MAINTENANCE of LADLE TURRETS

Transcription

1 INSPECTION and MAINTENANCE of LADLE TURRETS METALLURGICAL PLANT and ROLLING MILL TECHNOLOGY SERVICE

2 SMS SIEMAG X-Cellize Technical Service INSPECTION and PREVENTIVE MAINTENANCE are key to the productivity of today s continuous casters. Central to this area are ladle turrets because they constantly move the ladles from casting to charging position and back again. That s why the ladle turret has to work perfectly to ensure seamless operation of the entire caster. 2

3 X-CELLIZE SERVICE You know there are enormous dynamic stresses that act on revolving ladle turrets. These physical forces inevitably cause wear and tear, making regular maintenance a must. Otherwise, if the ladle turret is down, the whole plant grinds to a halt. That means you lose production and money. Yet, before things get that far, our X-Cellize technical service steps in with an inspection and maintenance package specially designed for ladle turrets. Included in this program is the key element of roller slewing bearings. To ensure long service life, you depend on these major factors: regular checks of the pre-stress on the bolts as well as sufficient lubrication of the bearings. Combining these tests with wear and lubricant analyses helps you recognize the condition of your bearings, so you can call in our experts on time to evaluate the situation. They then give you professional support in replacing your roller slewing bearing during a planned maintenance shutdown. 3

4 SMS SIEMAG X-Cellize Technical Service PLANNING TRUST in EXPERIENCE Maintenance shutdown planning Effectiveness and efficiency are the results of meticulous planning. Together with you, we draw up mandatory time schedules for all inspection, maintenance, and installation work, also projecting the necessary resources and tools. Access to experts and plant documents We can draw on all the plans and technical documentation as well as expert know-how from our design, production, and commissioning teams. What s in it for you? You save time due to spot-on analysis, planning, and organization from one source. 4

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6 SMS SIEMAG X-Cellize Technical Service INSPECTION and MAINTENANCE at a GLANCE The inspection points on the ladle turret 6

7 1 Roller slewing bearing Condition and degree of wear Bolts pre-stressing 2 Cover device Wear Bolts pre-stressing 3 Bearings 4 Weighing system Locking device Inspection of welded seams of turret structure 7 Anchor bolts pre-stressing 8 Drive unit 7

8 SMS SIEMAG X-Cellize Technical Service BREAKDOWN of the INSPECTION PROCEDURE PLANNING Teaming up on site with you and the local assembly team to fine-tune planning Adjusting planning and detailing each step of assembly, as well as the timeframe Personnel planning DISMANTLING the TURRET Shutting down utilities and disconnecting the drive system Lifting the whole upper turret part in one step if overhead cranes are available. If not: Removing the turret arms and the crossbeam with special lifting equipment: Dismantling the lifting cylinders Separating and dismantling the top and bottom parts of the turret Removing the roller slewing bearing 8

9 Our full service for ladle turrets 9

10 SMS SIEMAG X-Cellize Technical Service 10

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12 SMS SIEMAG X-Cellize Technical Service INSPECTING THE BEARING CONTACT SURFACES Optically measuring elevations at various locations around perimeter of turret base bearing seat Analyzing the machining necessary and calculating the proper amount of surface re-machining required MACHINING If necessary, surface re-machining of top and bottom bearing seats of the turret on site. Re-machining according to specifications within the permitted tolerances 12

13 Grease analysis, measurement of bolts pre-stressing and wear on the bearing Replacement of bearing, if necessary Re-machining the contact surface of the large slewing bearing with mobile machining center Inspection of main bearing 13

14 SMS SIEMAG X-Cellize Technical Service ASSEMBLING THE TURRET Installing the new roller slewing bearing on the machined bottom half of turret base, and pre-stressing the bolts according to specifications Placing the upper part on top of the turret and pre-stressing the fixing bolts Re-assembling the turret components TESTING AND RE-COMMISSIONING Re-connecting utilities and drive system Performing functional tests Casting start up 14

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16 SMS SIEMAG X-Cellize Technical Service X-CELLIZE TECHNICAL SERVICE is in our GENES X-Cellize is the SMS Siemag brand that encompasses our complete service range. Wherever you are in the world, you benefit from these sophisticated services. They are all designed with one purpose: to increase your plant availability! X-Cellize modular in structure to meet your demands 16

17 You re unique. That s why we put together customized X-Cellize service packages specially for you. Simply choose the modules you want. We offer you state-of-the-art service products for every eventuality. From know-how transfer to immediate response, support of long-term projects, and full-service contracts. 17

18 SMS SIEMAG X-Cellize Technical Service SMS Spares LLC Pittsburgh (PA), USA SMS Millcraft LLC Pittsburgh (PA), USA 8 other SMS Millcraft Service branches SMS Siemag AG Düsseldorf/Hilchenbach, Germany Band-Zink GmbH Langenfeld, Germany SMS Siemag Services Inc. Columbus (MS), USA SMS Innse S.p.A. Milan, Italy SMS Siemag Services Ltda. Belo Horizonte, Brazil SMS Siemag South Africa Ltd. Johannesburg, South Africa 18

19 SMS-Cheltec Chelyabinsk, Russia TMK-SMS Metallurg. Service Yekaterinburg, Russia SMS Siemag Metall. Services Vyksa, Russia SMS Siemag Metall. Services Magnitogorsk, Russia SMS Service Russia Moscow, Russia SMS Siemag Technology Beijing, China Right now, SMS Siemag operates 24 service branches in 8 countries, plus agencies in 40 more. Our service is where you are. SMS Siemag Met. Equip. Co. Ltd. Shanghai, China SMS India Pvt. Ltd. Calcutta, India 19

20 SMS SIEMAG AG Technical Service Division Graf-Recke-Strasse Düsseldorf, Germany Telefone: +49 (0) 211/ Telefax: +49 (0) 211/ Internet: SE/309 E 1.000/02/10 SP Ky Printed in Germany