Cathodes

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Carbon and Graphite Products for Primary Aluminum Smelters

Cathodes

Broad Base. Best Solutions.

SGL Group – The Carbon Company

SGL Group – The Carbon Company – is one of the world’s leading manufacturers of carbon-based products. We have a comprehensive portfolio ranging from carbon and graphite products to carbon fibers and composites. Our core competencies include a wide knowledge of raw materials, specialized production expertise and in-depth application and engineering know-how. As a result, we have built up a comprehensive technology and product portfolio. We operate on a global scale and are close to our customers anywhere at any time. Supported by this broad base, we offer our customers the best solutions. That is what SGL Excellence stands for.

Our Business Line ”Cathodes and Furnace Linings“ manufactures cathodes for the production of primary aluminum and furnace linings enable the production of pig iron. c

Leaders in our key markets and support our customers' growth

Co-operate closely with the worldwide leading companies of the Iron-, Steel- and Aluminum industry via local sales organizations in more than ninety countries c

Offer our customers decisive competitive advantages with our wide range of comprehensive services accompanying our cathodes and furnace linings c

Rely on high quality standards and supply security. This is supported by several high performance locations c

c

Top priority is given to Safety, Health & Environment.

Innovative in product development, optimising processes, managing our customer relationships, continuously improving our efficiency and reducing costs by using the Six Sigma methodology c

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Products for Primary Aluminum Smelter Made by SGL Group

2

3

4 4

1

4

1

2

3

4

Cathode blocks  amorphous  graphitic  graphitized

Sidewall blocks  amorphous  graphitic  graphitized

Ramming pastes  cold ramming paste  hot ramming paste

Special glue

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Cathodes Matching Your Needs Cathode blocks SGL Group is the only independent cathode supplier offering the complete product range from Amorphous to Graphitic and Graphitized Cathodes.

Premium graphitized cathode grade TG2

Customized Solutions for Dimensions and Designs c Flexibility in dimensions c Capability to supply different shaped slots

Amorphous and graphitized cathode blocks

Cathodes with double slot

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Different shapes of amorphous cathode blocks

Technical Data of Carbon Blocks with grain 40

•µm

40

•µm

Specific electrical resistivity

against grain

30

3

30 3

20

20 2 1

10

0

200

400

600

15

1

9

9

8

8

7 400

600

6

800 1000 Temperature °C

140

W/(K•m)

100

0

200

400

600

60

2

40

20

3

20

0

200

400

600

0

800 1000 Temperature °C

7 6 5

1

4

3 2

µm/(K•m)

µm/(K•m)

3

800 1000 Temperature °C

120

40

1

1 600

800 1000 Temperature °C

200

400

600

800 1000 Temperature °C

1 3 2

4

2

400

0

5

2

200

2 3

6

3

0

1

7

3

0

2

80

1

60

1 graphitized 2 graphitic 3 amorphous

1

100

80

Coefficient of linear thermal expansion

800 1000 Temperature °C

140

120

0

600

11

10

200

400

14

10

0

200

15

11

7

0

12

3

12

1

13

2

13

W/(K•m)

0

800 1000 Temperature °C

16 14

Thermal conductivity

10

MPa

Flexural strength

MPa

0

2

0

0

200

400

600

800 1000 Temperature °C

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Complete Product Range Providing Custom-Made Solutions

Extended Product Portfolio of Cathodes Sidewall blocks, ramming pastes and special glues round up the cathode product portfolio – providing complete custom-made solutions to optimally fit the requirements in the Aluminum smelter.

Sidewall Blocks SGL Group supplies various grades of sidewall blocks including: Amorphous, Graphitic and Graphit­­ized to suit specific requirements for heat dissi­pation.

Sidewall blocks made from carbon and graphite

Ramming Pastes For cold application we have been manufacturing the ECO paste and with lower PAH thus making them more environmentally friendly than traditionally available pastes. High baked apparent densities, high compressive strengths and low specific electrical resistivities ramming paste materials.

Ramming pastes

Special Glues Our collector bar cement is a well established alternative to cast iron rodding with good technical properties and also importantly more operator friendly for installation. Glue for cathode and sidewall blocks

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Technical Competence and Innovation Close to Customer

Leading aluminum producers worldwide recognise SGL Group for its high technical competency. Our comprehensive product range provides the ideal solution for all primary aluminum production technologies. Along with the leading aluminum producers, we develop new products, reduce power consumption in aluminum cells and extend the lifetime of our cathodes. The Technical Service provides professional and highly qualified support around the application of cathodes, sidewalls, ramming pastes in customers’ processes. Selection of Raw Materials SGL Group works in partnership with its suppliers to ensure supply of consistent high quality raw materials to specification and on time. We evaluate and compare in our modern laboratories between suppliers and also for potential new sources, to satisfy product improvement and safeguard long term supply. Providing technical solutions with new product grades for low energy operation and environmentally friedly application, we continue to invest in Research and Development taking advantage of the skill base from the whole SGL Group for the challenges from the Aluminum Industry for Low Cost of Ownership of the cathode materials. Modern Production Technologies SGL Group’s production processes and methods ensure consistency of product quality and supply. We also continue to invest in new production equipment and new green field facility to maintain world leading position both as high quality product supplier and as the largest cathode producer.

Quality assurance system until delivery

Technical Expertise for Optimal Cathodes Application c Consistently high quality of the products through decades of know-how and stringent applica tion of SGL Excellence (Six Sigma) c Consulting service and assistance for the selec tion and application of our cathodes, sidewall blocks, ramming pastes and special glues c Regular technical service and technical dialogue c Customized solutions for dimensions and designs Cost-effectiveness of the Aluminum Production c Intense product innovation to cater to your needs for higher productivity, increased energy-efficien cy and longer lifetime. c The continuous development of next generation products supports optimal solutions to the increas ing challenges in the smelting process such as cell life, productivity, and energy efficiency.

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Contact: Cathodes SGL CARBON GmbH Werner-von-Siemens-Strasse 18 86405 Meitingen / Germany Phone +49 8271 83-1212 Fax +49 8271 83-1251 CE @ sglcarbon.de SGL CARBON, LLC 8600 Bill Ficklen Drive Charlotte, NC 28269 / USA Phone +1 704 593-5210 Fax +1 704 593-5117 [email protected] SGL CARBON Asia-Pacific Sdn Bhd 11 Jalan Graphite 1 Kawasan Perindustrian Bandar Mahkota Banting 42700 Banting Kuala Langat Selangor Darul Ehsan Malaysia Phone +603 3182-3000 Fax +603 3182-3009



05 2014/0 1NÄ Printed in Germany

This document is based on our best current knowledge and is intended to provide information on specific properties of our products and their applications. The above data have been obtained under laboratory conditions by employing the test methods described. This information should not, therefore, be taken as guaranteeing specific properties or the suitability of the product for a specific application under working conditions unknown to us. In particular, the specific data should not be taken as a warranty for the durability or performance of a product in the stated application. SGL Group cannot assume any liability in respect thereof. Any existing intellectual property rights must be observed.

Performance Products SGL CARBON GmbH Soehnleinstrasse 8 65201 Wiesbaden/Germany www.sglgroup.com