A total turnkey effort
The project was truly a total turnkey effort due to the fact that materials. tools, and required consumables were not always readily available on the island. Therefore, 100% of the equipment, complete through the construction barricade tape, was provided by IAC from the US mainland.
IAC, Mission, Kansas, was awarded the turnkey project out of six US and European bidders as the design/build company.
IAC designed and supplied two Columbian Tec Tank (CTT) skirted silos: one drive-through with truck load-out, and the second silo with pneumatic conveying capabilities.
IAC`s design/build scope of work started at the barge unload port (150m for the bulk storage location) and continued through the truck load-out and dispatch.
Due to the stringent air quality requirements and a wide spectrum of air flows into the silos, a unique, two-stage filtration system consisting of one oversized IAC Pulse-Jet Filter and two vacuum fans with VFD motor drives were utilized. Vacuum and pressure readings were monitored and sent to the IAC PLC automated control system, which then controlled fan air flow and static pressure through the dual air movement fan system. The goal was to not allow over 1/2 psig at the top of the silo, nor greater than 20 in. wc vacuum. This optimum range, together with PTFE filter bags, has been successful in providing a dust-free environment throughout the local resort and mining areas during all terminal operations.
Also of note, is that the two Columbian Tec Tank bulk storage silos used in this project were the largest hopper bottomed silos that CTT had ever produced.
Cement can be transferred from the bulk carrier ship through a 10 in. line directly into the silos with a total storage capacity of 5500 T.
The terminal has an automatic control steering system consisting of three groups: filling, transfer and discharge. The bulk trailer drives from under the highest situated silo and is filled by a ventilated load-out spout.
The air pumps and filters can be directed for each group separately and/or simultaneously. From the central positioned control panel, the operator can monitor the process. The entire system has electronic security and operates completely automatically after the start up of each group.
The cylindrical part of the silos continues to the lower part of the foundation and at the same hole acts as a support. The conical part is adjusted on the inner part of the cylinder.
All required equipment is located in the empty space below the storage silos. The fans and blower fillers are located on the roof, and operate in an enclosed system and secure a perfect and dust-proof transfer operation of the loose powder product.
The transfer and discharge of this cement terminal is fully user-friendly and meets the high US and European standards of hygiene and environment. The color and location of the cement terminal harmonizes with the limestone quarry area with the Tafelberg in the background.