Deposit of high toxic waste in underground storages and underground reutilisations of the K+S AG

K+S Group

K+S Entsorgung GmbH

Deposit of high toxic waste in underground storages and underground reutilisations of the K+S AG

Belgrade, Serbia, 24.11.2011

K+S Group

K+S Entsorgung GmbHThe K+S Group | Facts and figures

Sites in 25 countries

A world wide leader in the sectors of:

• Special and standard fertilisers

• Plant care products

• Salt products

• More than 15,200 employees

• Revenue 2010: 4.99 billion €

• Since September 2008: listed in the DAX – Germany‘s most important stock index


K+S Group

K+S Entsorgung GmbHThe K+S Group | Corporate structure

K+S Group

Core Business Sector FertilizersCore Business

Sector SaltComplementary

Business Sectors

NitrogenFertilizers

Salt

Waste Mgmt. &RecyclingPotash and

Magnesium Products Animal hygieneproducts

Kali-TransportGmbH (KTG)

Trading business (CFK)


K+S Group

K+S Entsorgung GmbHK+S Entsorgung | Profile

• A K+S Group business segment since 1991

• Disposal activities are centrally managed from Kassel

• Internationally active, with representatives in eight countries

• Pioneer of underground waste disposal;first facility worldwide: Herfa-Neurode (1972)

• Revenue 2010: 73.8 m. €

Europe‘s leading company in the field of underground waste disposal


K+S Group

K+S Entsorgung GmbHK+S Entsorgung | Areas of activity

Recycling

K+S Entsorgung

Underground waste management

Disposal(UTD)

Reutilisation(UTV)

Salt slag(REKAL)

Buildingmaterial


K+S Group

K+S Entsorgung GmbHK+S Entsorgung | Areas of activity

Underground disposalSolution for highly contaminated materialsLong-term removal from the biosphere

Underground reutilisation

Solution for less contaminated materialsUtilisation of the material properties by:• Stacking backfill• High-consistency slurry backfill• Tipping backfill

Building material recycling

Recycling of construction materialsUtilisation as cover material for greening a potash tailings pile

Secondary aluminium

System solutions • Distribution of salt fluxes• Recycling of salt slag• Raw materials recovery• Disposal of filter dusts


K+S Group

K+S Entsorgung GmbHDisposal facilities | Germany

1 Underground waste disposal plant Zielitz

2 Underground waste disposal plant Herfa-Neurode


K+S Group

K+S Entsorgung GmbH


2 Underground waste disposal plantHerfa-Neurode

3 Underground reutilisation facility Zielitz

4 Underground reutilisation facility Bernburg

5 Underground reutilisation facility Wintershall

6 Underground reutilisation facility Hattorf

7 Underground reutilisation facility Unterbreizbach

Disposal facilities | Germany


K+S Group

K+S Entsorgung GmbH


2 Underground waste disposal plant Herfa-Neurode

3 Underground reutilisation facility Zielitz

4 Underground reutilisation facility Bernburg

5 Underground reutilisation facility Wintershall

6 Underground reutilisation facility Hattorf

7 Underground reutilisation facility Unterbreizbach

8 Aluminium salt slag recyclingSigmundshall

9 Building material recycling Sehnde

Disposal facilities | Germany


K+S Group

K+S Entsorgung GmbH

• Focal point: underground waste disposal

• Disposal at own facilities

• Largest number of facilities on the market

• Largest range of procedures

• Ideal conditions for long-term safe disposal of wastes

Solutions | Underground waste disposal

Basic principle: Safety


K+S Group

K+S Entsorgung GmbH

Formation of the salt layers 250 million years ago

Evaporation caused by solar heat

Barrier

Salt deposit

Potash deposit

Semi-enclosed sea

Salted sea water

Geology | Formation of the salt and potash deposits


K+S Group

K+S Entsorgung GmbHGeology | Werk Werra

Deposit thickness up to 500 metres | Gastight


K+S Group

K+S Entsorgung GmbHMining | Map of mine


K+S Group

K+S Entsorgung GmbHMining | Preparation for blasting

2 | Blast hole drilling

1 | Large hole drilling

3 | Filling with explosives


K+S Group

K+S Entsorgung GmbHMining | Underground transport of salt

4 | Transport of ore 5 | Transport via conveyor to the shaft


K+S Group

K+S Entsorgung GmbHMining | Preparation of the cavities

1 | Scaling of the roof 2 | Installation of roof bolts


K+S Group

K+S Entsorgung GmbHMining | Construction of roadways

1 | Filling up with salt 2 | Levelling, humidification, compacting


K+S Group

K+S Entsorgung GmbH

Objective: long-term-safe removal of hazardous wastes from the biosphere

UTD | Disposal of wastes


K+S Group

K+S Entsorgung GmbH

• Ideal geological conditions and technical safety systems

• Deposit at depths of 500 to 800 m, way below the ground water

• Traceability of all deposits due to detailed documentation

• Retrievability of all wastes for recycling

Objective: long-term-safe removal of hazardous wastes from the biosphere

UTD | Disposal of Wastes


K+S Group

K+S Entsorgung GmbHUTD Herfa-Neurode | Prerequisites

Safest solution for the disposal of hazardous waste

Prerequisites for underground waste disposal:

• Disused, excavated area of the mine

• Remote from extraction area with possibility to be sealed off

• Galleries remain open and have no backfill obligation

• Galleries have to be stable and must remain accessible even after a longer time

• Mine has to be dry and free of water

• Storage area has to be sealed off from biosphere by geological barriers

• Maintenance-free


K+S Group

K+S Entsorgung GmbH

Examples of waste types

• arsenic-containing wastes

• mercury-containing wastes

• contaminated construction and demolition waste

(e.g. heavy metal, dioxin, mercury, PCB)

• hardening salt residues

• cyanide-containing wastes

• filter dusts

UTD Herfa-Neurode | Waste types


K+S Group

K+S Entsorgung GmbH

Natural barriers

• Salt (gastight) 300 m

• Clay (watertight) 100 m

• Bunter stone 500 m

Artificial barriers

• Waste packaging

• Brick walls

• Field dams

• Disposal field dams

• Watertight sealing of the shafts

UTD Herfa-Neurode | Multi-barrier-system


K+S Group

K+S Entsorgung GmbHUTV | Underground Reutilisation

Objective: safeguarding former mining chambers


K+S Group

K+S Entsorgung GmbH

• Utilisation of the wastes‘ material properties

• Deployment of certain, non-mining mineral wastes

• Support of pillars by backfill material, prevention of deformations

• Disposal option for less contaminated materials

• Backfill obligation valid only for certain mine sectors

UTV | Underground Reutilisation

Objective: safeguarding former mining chambers


K+S Group

K+S Entsorgung GmbHUTV | Backfill Procedures

Backfill procedure depends on waste properties & site conditions

• Deposited by dump trucks

• Dumping and compacting

• Marginally contaminated materials

Tipping backfill Stacking backfill Slurry backfill


K+S Group





Tipping backfill Slurry backfillStacking backfill

• Conditioning and packaging

• Stacking of big-bags

• Filling of the gapswith rock salt



K+S Group





Tipping backfill Stacking backfill Slurry backfill

• Material pneumatically transportable

• Mixing with salt brine

• Sludge production

• Pumping into caverns

• Conditioning and packaging

• Stacking of big-bags

• Filling of the gapswith rock salt



K+S Group

K+S Entsorgung GmbH

• Solution for uncontaminated or marginally contaminated soil,construction and demolition waste

• Processing of material

• Depositing on potash tailings pile

• Basis for plant growth

Recycling | Building Material Recycling

Pilot project: greening of potash tailings pile


K+S Group

K+S Entsorgung GmbH

• Provision of high-grade salt fluxes

• Salt slag processing

• Reutilisation of all components

Recycling | REKAL

Complete solution for the secondary aluminium industry


K+S Group

K+S Entsorgung GmbHK+S Entsorgung | Long-term-safety

• Agencies in different countries

• International team

• Experienced in project management

• Experienced in managing notificationprocedures

• Large number of sites

• Technical diversity

• Longest experience in underground disposal

• Maintenance-free


K+S Group

K+S Entsorgung GmbH

T h a n k y o u f o r y o u r a t t e n t i o n !


Documents

Deposit of high toxic waste in underground storages and underground reutilisations of the K+S AG