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Projektinfo – Detailed information on energy research

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© AlzChem Trostberg GmbH
A new process begins normal operation
Projektinfo 08/2011

Fig. 1: Carbide bottle transport container outside the carbide furnace building in Hart.
© AlzChem

Fig. 2: AlzChem Trostberg GmbH production group
© AlzChem Trostberg GmbH
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Producing carbide using plastic waste

Carbide is an important base material for production of fertilisers, manufacturing raw iron und in other products for the chemical industry. A chemical company from Southern Germany has developed a new process which allows plastic waste to be used to produce carbide. The carbon in the plastics is used in the carbide synthesis. That means that part of the black materials coke and coal used for the production can be replaced by the secondary raw material SCS (=synthetic carbon sources).

„The positive experiences in the operating phase have revealed that plastics can be used as carbon sources in our production process. We are therefore very confident that we can recycle around 1,000 tonnes a month in 2011. Delivery is made by rail or truck,“ explains Jürgen Franke, responsible for material flow management in the AlzChem plant in Hart, Upper Bavaria.

Specific requirements are made of SCS. In addition to compliance with quality parameters, the physical form is key. The Hart plant can currently use three-dimensional plastic waste, pellets or fluff. Material flows from commercial and industrial plastic processing sectors are particularly suitable for recycling. High quality and purity standards apply to SCS. It must be shredded and preselected.

AlzChem Trostberg GmbH works with selected suppliers who guarantee constant high quality.

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Even plastic fractions with a chlorine content of up to 10 per cent by weight can be used. The majority of the chlorine is found as uncritical calcium chloride in furnace dust. For this reason, the AlzChem experts don’t have to worry if the SCS is not separated by type on delivery. In addition, it is even possible to use SCS which would have otherwise been extremely difficult to recycle in an environmentally-friendly manner.

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