G r a p h i t e D i s p e r s i o n s

T e c h n i c a l I n f o r m a t i o nGraphit Kropfmühl / AMG Mining AG

Graphit Kropfmühl / AMG Mining AG has more than

140 years of tradition and expertise in raw materials.

With our permanent will to create, market proximity

and absolute customer orientation we have become a

trend-setting graphite refiner. On the basis of state-of-

the-art, quality-conscious high technology and in an

intensive dialogue with customers and partners, we

develop high-quality special products. In order to secure

the supply of raw materials we hold shares in mines

located in Africa, Asia and Europe.

Our leading position as an internationally operating,

listed graphite specialist is both motivation and

obligation. Extensive research and development work

guarantees a permanent optimisation of our product

range and allows us to fulfil specific customer wishes.

07/

2013

www.gk-graphite.com

Natural Graphite

SyntheticGraphite

AmorphousGraphite

GraphiteParts

ExpandableGraphite

GraphiteDispersions

PORTFO

LIO

A member of Advanced Metallurgical Group N.V.

A member of Advanced Metallurgical Group N.V.

Contact: AMG Mining AG 94051 Hauzenberg , Langheinrichstraße 1 , Germany Tel.: +49 8586 609-178, Fax: +49 8586 609-112 e-mail: sales@gk-graphite.com, web: www.gk-graphite.com

Contact: Zimbabwe German Graphite Mines (PTY) Limited90 Mutare Road Msasa, Harare / Zimbabwe Tel.: +49 8586 609-178, Fax: +49 8586 609-112 e-mail: sales@gk-graphite.com, web: www.gk-graphite.com

Contact: Bogala Graphite Lanka Ltd. No 20 Tickell Road, Colombo 08 , Sri Lanka Tel.: +94 112 696-146, Fax: +94 112 698-708 e-mail: amila@gk-graphite.lk, web: www.gk-graphite.lk

Contact: Qingdao Kropfmuehl Graphite Ltd.Room 2502, Entrance 2, Building 2, Dragon Plaza No. 19 Miaoling Road, Laoshan District, QingdaoShandong Province 266061, P.R. ChinaTel.: +86 532 88967200, Fax: +86 532 88967100 e-mail: qkg@gk-graphite.cn, web: www.gk-graphite.cn

Contact: AMG Mining AG 22880 Wedel , Von-Linne-Straße 7-11 , Germany Tel.: +49 8586 609-178, Fax: +49 8586 609-112 e-mail: sales@gk-graphite.com, web: www.gk-graphite.com

Contact: Edelgraphit GmbH 53175 Bonn , Friesdorfer Straße 242 , Germany Tel.: +49 228 310236, Fax: +49 228 313026 e-mail: info@edelgraphit.de, web: www.edelgraphit.de

Contact: Graphite Týn, spol. s r.o.Písecká 417, 37501 Týn nad Vltavou, Czech RepublicTel.: +420 385 109210, Fax: +420 385 109210e-mail: graphite@gk-graphite.cz, web: www.gk-graphite.cz

Sri Lanka

Zimbabwe

Qingdao

Wedel (b. Hamburg)

BonnTýn

Kropfmühl

AMG Mining AG, Kropfmühl, Germany

Corporate headquarters of GK group.processing of natural graphite, centre of excellence for graphite, R&D centre, administration of GK group

flotationpurification plant wide range of milling facilitiessieving and homogenisation plantproduction of dry graphite blendsproduction of graphite dispersions

AMG Mining AG, Wedel, Germany

storing, homogenisation and screening of natural and expandable graphite grades

Edelgraphit GmbH, Bonn, Germany

production of lubricants and graphite dispersionsmachining of graphite partscustomised graphite specialitiesproduction of ready-to-use graphite parts

Graphite Týn spol. s r.o., Týn, Czech Republic

processing of synthetic and special Sri Lankan vein graphiteprocessing of natural graphitepurification plantmilling facilitiessieving operationproduction of lubricants and graphite dispersions

Qingdao Kropfmuehl Graphite Ltd.Qingdao, Shandong Province, P.R. China

purification plantsieving and homogenisation plantproduction of graphite dispersionsmilling facilitiesprocessing of natural and synthetic graphite

Bogala Graphite Lanka Ltd., Bogala, Sri Lanka mining and processing of vein graphite

underground miningflotation plantmilling facilitiessieving operationlubricant plant

Zimbabwe German Graphite Mines Ltd., Zimbabwe

underground miningflotation plant sieving operation

Graphite

Like diamond, natural graphite is a modification of

carbon. The basic structure of graphite consists of a

hexagonal arrangement of carbon atoms which form

stable planar lattices with only weak inter-layer bonding

(Van der Waals forces).

The unique properties of graphite resulting from its

distinctive layered structure and chemical inertness

make it the material of choice in many applications.

Properties of graphite

Excellent electrical and thermal conductivity

Excellent lubricating properties particularly at

elevated temperatures and pressures

High oxidation resistance and immunity against

aggressive chemicals

Environmentally friendly

Graphite dispersions

Many years of experience in the field of graphite

dispersions has continuously increased the quality and

performance of the Graphit Kropfmuehl products in the

market. Being a graphite refiner with own mines, we

have total control over the performance indicators in our

formulations. Choosing the right raw material source in

combination with the matching subsequent process, we

are able to offer dispersion products for a wide variety of

applications.

What is a dispersion?

A mixture of a minimum of two different materials

Single phases can be clearly defined and can

normally be separated by physical means

A dispersion of a solid in a liquid is called a

suspension. In the case of graphite the designation

“dispersion” is universial

Dispersed solid particles that are < 1 µm are known

as colloidal dispersions

Fields of application

Graphite dispersions are used in applications that

require a uniform and fine distribution of graphite

within the carrier material.

Depending on each individual application, the following

dispersion properties are of decisive importance:

Sedimentation stability, surface tension, wetting

behavior on different surfaces, adhesive power on

different surfaces, drying time, viscosity, pH-value, and

ionogenity.

In order to improve the dispersing effect, tailor-made

formulations, apart from graphite and the dispersion

agent (in most cases water), also contain protective

colloids, preserving agents, and other

additives. Graphite dispersions can be individually

produced for any application.

The main fields of application are:

Graphite dispersions for metal forming

Graphite coating dispersions

Graphite additives

Lubrication

Separation

Insulation

Heat transfer

Wear reduction

Descaling

ReleaseSurface protection

Corrosion inhibition

Graphite dispersions for metal forming

Lubricant properties in the metal forming process:

Water or oil based dispersions with fine grained

graphite improve forging operations. Higher productivity

combined with cost reductions result from tailor suited

graphite lubricants. A wide range of products is available

for both, the warm and hot forging process.

Coarser grained graphite dispersions meet the high

temperature requirements for mandrel bar lubrication

and rolling applications. Graphite based dispersions are

used as release agents in a wide variety of casting and

moulding appliances.

Graphite coating dispersions

Graphite coating dispersions are applied on different

surfaces to create a layer for reducing friction. The

graphite coating dispersions can be applied on metallic,

non metallic, plastic, rubber or natural basic materials.

Graphite coating dispersions are used to create a

conductive or protective coating. Depending on the

operation condition the dispersion contains a solvent or

polymeric based binder.

Graphite additives

Graphite is added to a solvent, oil or water to

enhance properties and performance. An oil based

graphite dispersion can be used as an additive to a

mineral or synthetic oil to achieve emergency running

properties.

A water based graphite dispersion is mixed with an

oil to create a product that withstands high

temperatures. A solvent based graphite dispersion

impregnates different materials and leads to

conductivity in the material matrix.

Our products

Brand Application Grap Aqua hot metal forming

Aquanet hot metal forming Graflak corrosion protection Aquapowder hot metal forming Grafein lubrication of railway points Descalin descaling agent Drigosin paint for corrosion protection Graphi pol surface coating, corrosion protection

If you have a very special application, we can offer

you a customer related solution. We provide for:

synergistic premixes

formulations with d50 < 2,0 µm graphite

dispersions for airspraying, printing, airless

application systems

comprehensive technical support

We can deliver graphite dispersions “ready to use” or

as a powder mixture which must be dispersed on site

using special high performance mixers.