The Sigmundshall works of K+S KALI GmbH is located in the Hanover region, and is Nether Saxony’s last active potash producing mine. It is situated approximately 25 kilometres northwest of Hanover and about 5 kilometres to the south of the Steinhuder Meer, near Wunstorf. A characteristic feature of the Sigmundshall mine is the steep angle of its salt seams, requiring special extraction methods. The range of products includes potassium and magnesium containing fertilisers, but also straight potassium chloride, which is processed from the crude salt into products for industrial applications (such as electrolysis). From Sigmundshall, these products are shipped worldwide by rail, road and inland waterways.
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Photographs of the Sigmundshall site
With approximately 770 employees above ground, among them nearly 45 apprentices and trainees, the Sigmundshall works is one of the most important regional employers. Potassium and magnesium production significantly contributes to the region’s economy. This facility regularly award contracts to regional sub-contactors and service providers, thereby creating an economic base for a large number of regional jobs. The site is also committed to supporting social institutions, associations and clubs.
| 2001 | – | Kieserite production starts |
| 1997 | – | Mining depth of 1,400 metres is reached |
| 1965 | – | The Kolenfeld shaft is sunk to a level of 940 metres |
| 1963 | – | Implementation of trackless conveyor technology |
| 1949 | – | Re-commissioning of crude salt extraction |
| 1933 | – | Shut-down of operation |
| 1923 | – | Abandonment of the Weser mine |
| 1913 | – | The Weser shaft is completed |
| 1906 | – | Beginning of excavation of the Weser shaft |
| 1906 | – | Plant is taken into operation |
| 1898 | – | Beginning of excavation activities |
DIN EN ISO 9001ff. certificate Sigmundshall (pdf)
GMP+ certificate Sigmundshall (pdf)
