Products StoredCement Storage |
Cement producer LafargeHolcim needed a dome with the capacity to store 50,000 short tons in St. Paul, Minnesota, and contracted with Dome Technology to build it.
According to LafargeHolcim area terminal manager Jack Holm, the choice to go with a dome was based on overall storage capacity within the allowable footprint. The dome is 124 feet in diameter and 132 feet tall.
“(The dome) allows us to bring in an additional 50,000 tons of cement via barges, which generally gives us enough cement to get through the time period when the river is closed,” or four months during the winter, he said. “Barge freight is cheaper than rail freight, so we’re able to take advantage of these savings.”
The cleanout system includes a conical floor with eight aeration spokes that provide 90 to 94 percent cleanout. Product left between the spokes is cleaned out via screw; LafargeHolcim contracted with Laidig for the screw, and Dome Technology collaborated with Laidig on the overall reclaim system. Cement powder is loaded out of the dome by conveyors in a tunnel under the dome floor.