WTW Americas

Gypsum & Wallboard


Bulk Materials Handled


Natural Gypsum, Rock Gypsum, Wet and Dry FGD Gypsum, Stucco Gypsum, Anhydrite, Land Plaster

WTW Americas specializes in handling sticky, wet, hot (up to 7500C), abrasive and non-free-flowing bulk materials. We have extensive experience in the handling of Flue Gas Desulfurized Gypsum, synthetic gypsum, or by-product gypsum from scrubber systems.

For decades, we have been providing equipment solutions for the wallboard making process, as well as the finish or additive mills of the cement making process.

WTW Americas can offer systems that receive, store, dose, discharge and convey these difficult to handle materials.

Recommended Equipment


Active Bottom Discharger (ABD)

Active Bottom Discharger (ABD)

The Active Bottom Discharger is a very simple, low maintenance answer to receiving raw material from trucks, trailers, or front end loaders and leading it into a process. The ABD is installed in a pit allowing the various vehicles to unload directly into it. Once the material is transferred into the ABD moving rakes push the material toward the aft wall against the stationary ladders.

The ABD is capable of receiving materials such as biomass, industrial or municipal wastes, woodchips and bark, and complete or shredded tires.

Truck Unloading Station (TUS)

Truck Unloading Station (TUS)

The WTW Americas Truck Unloading Station is one of our most popular, and requested pieces of equipment. This custom designed machine allows clients to receive bulk materials that can be led directly into their process, with no need for expensive civil work, continuous manpower, underground pits, or other conveying systems. Trucks, or front end loaders can simply tip their load into the reception area and pull away. The material is then fed, at a controlled pace, into the process. The TUS can easily be relocated or made fully mobile using tires.

The TUS is capable of receiving all materials and alternative fuels such as dry or dusty powders, municipal and industrial solid waste, biomass, and other treated or untreated materials.

Sweeping Auger (SAS)

Sweeping Auger (SAS)

The Sweeping Auger is designed to be mounted at the bottom of silos or bunkers with diameters up to 25m.

It is used to discharge lighter density materials. Operating in a circular motion, the large screw, which also circulates, draws a uniform disk of material towards the central discharge. The SAS can be retrofitted into existing installations saving customers money on building new storage facilities.

The SAS is capable of receiving, and discharging, materials such as bypass dust, wood chips, plastic and plastic pellets, or most other lighter density product after it has been pre-treated.

Trailer Docking Station (TDS)

Trailer Docking Station (TDS)

The WTW Americas Trailer Docking Station is the industrial answer to receiving treated materials from walking floor trucks. Optional hydraulic systems allow a trailer to be left connected to the TDS while the truck pulls away, thereby making the walking floor trailer an automatic material buffer or storage device. As material is slowly emptied from the trailer into the reception area, an active bottom feeder conveys the material into a chain conveyor, and then into the intended process. A double docking station would maximize productivity by allowing continuous feed of material. The TDS requires no civil engineering and no pit, making it a very easy and economical solution for receiving material from a trailer.

The TDS is capable of receiving most treated materials used in burning alternative fuels.

Chain Conveyor (CC)

Chain Conveyor (CC)

The WTW Americas Chain Conveyor is a heavy duty and reliable means of transporting material from one or more stages of a process to the next. With its dust and gas tight construction, as well as its explosion proof design, the CC is the most reliable means of conveying in any industry. It can successfully handle sticky or hot materials up to 750°C. The CC is capable of conveying most materials such as wood chips, sawdust, plastic, biomass, and municipal solids waste.

BinEX (Rotary Bin Discharger)

BinEX (Rotary Bin Discharger)

The BinEX is the most versatile and flexible discharge system. Available in sizes from 1.6 to 8 meters in diameter, flow rates of 0.5 to 2,000 t/h, can be achieved. With material testing and our design, WTW Americas can help you achieve maximum storage and mass flow discharge from your silo.

PlanEX (Large Silo Discharger)

PlanEX (Large Silo Discharger)

Our PlanEX is WTW Americas largest discharge system with material storage capacities up to 5,000 m3 and silo diameters from 5 meters to 12 meters. It is the most effective in obtaining total mass flow of materials. The PlanEX is recommended in power, cement, wallboard, waste handling and other industries where non free-flowing materials have to be stored.

Bunker Discharge Machine (BDM)

Bunker Discharge Machine (BDM)

The BDM is available in a variety of design and configurations to meet any application. It can be used in various discharge operations. The BDM can be supplied with rails, a festoon system, VFD or can include an integrated weigh feeder, allowing total flow control accuracies of better than 1%. With capacities of 10 to 4,000 t/h, the BDM can reclaim and extract materials from any bunker, hopper or large silo. Many installations are also done underneath massive stockpiles. WTW Americas BDM is the industry standard for reliability and continuous operation.