Active environmental protection

Taking individual responsibility for the benefit of the environment

When we talk about “active environmental protection”,

we mean taking individual responsibility for the benefit of the environment, before we are forced to do so by mandatory legal regulations. Concretely, our activities are based on three pillars:

  1. New factories that we are planning to build are drafted by our in-house planning department. We develop some of the plant components ourselves or in collaboration with manufacturers, to ensure that we always use the best technology available. Older factories are consistently retrofitted and brought up to the present state-of-the-art.

  2. Only continuous monitoring makes it possible to comply with environmentally relevant standards. The inspection intervals of many of our plant components are shorter than stipulated by the regulations. The validated environmental management system EMAS confirms that all of the relevant legal regulations are adhered to.

  3. Well trained and motivated employees make an important contribution to environmentally friendly production as well as to occupational health and safety.

Examples from plant technology:

Galvanizing line exhaust air purification

Hot-dip galvanization generates smoke and dust over the zinc bath. Thanks to an enclosed furnace housing and powerful exhaust air extraction and filtering, these residues are not released to the atmosphere, but are filtered out and collected. On the one hand, these residues can be used as a source for recycling process chemicals, and on the other hand, metallic zinc can also be recovered from them, making it possible to more or less completely close the material cycle of the hot-dip galvanization system. mehr

Exhaust air purification in the pre-treatment line

In the pre-treatment line the steel is chemically pre-treated. A series of immersion baths is used to remove oil and grease, to remove rust and scale, as well as to apply the flux to improve the wetting properties when dipping into the zinc bath. The baths develop fumes of some of the substances they contain. Thanks to the enclosed housing and continuous exhaust extraction and purification we are able to prevent contamination of the surrounding air. mehr

Waste heat recovery from the zinc kettle

The exhaust gas temperature in the combustion chamber of the galvanizing furnace is approx. 550° C. Instead of allowing this waste heat to be given off into the surroundings through the chimney unused, in our galvanizing furnace it is passed through a heat exchanger and can, for example, then be used as process heat for heating the pre-treatment bath as well as for offices and staff rooms. The temperature at the chimney is now a mere 80 - 100° C, allowing us to save heating energy and reduce our burden on the environment. mehr