The company Wilhelm Jost GmbH & Co. KG can look back on a long history: Everything started with a paving operation, more than 100 years ago. Today, Werner and Bernd Jost operate a well-run road construction company that has been in the family for multiple generations. Their diabase quarry, which Wilhelm Jost GmbH & Co. KG acquired in the 1970s, is based in Altenkirchen. They also run an asphalt mixing plant a few kilometers away, in Braunfels-Philippstein, since the 1960s
The Altenkirchen quarry primarily supplies three asphalt mixing plants (including its own) and three concrete mixing plants with the production of high-grade aggregates. Other materials are sold as a mixture to nearby clients, with some also serving their own internal demand. Metso is a turnkey supplier for the quarry, supplying the screening solution as well as the crushing equipment (LC145, Nordberg® HP3™ cone crusher, Nordberg® HP100™ cone crusher Modular and Lokotrack® LT1213S™) and related wear and spare parts.
Renewing the existing plant and solving a production bottleneck
As early as 2016, the company’s management was considering two options: construct a completely new building or, alternatively, gradually renew the existing production plant at the Diabaswerk Altenkirchen over a period of time. Large parts of the plant had been in operation since 1994 and were at the end of their economic life. In view of an impending loss of production and the limited space available, a gradual and partial renewal of the old plant was considered the best option. So, in 2018, together with Metso Germany, project planning got under way.
In addition to the renewal of the machines, another goal was to eliminate a problematic bottleneck in their high-grade chippings production in order to be able to expand the capacity of the high-demand 5/8, 8/11, 11/16 and 16/22 mm fractions.
“We are convinced that in the future the market will require even greater quantities of high-quality aggregates,” explains managing director Bernd Jost.