Mining

You didn’t say whether your environment was extremely hot or extremely cold, but either way, the answer is yes! Thern can equip the electric winch gearbox with the appropriate lubrication for your environment to provide trouble-free operations from -40°F to +130°F (-40°C to +54°C). We can also provide air-conditioned motors and control panels, as well as heated ones. No matter your environment, our technical sales team can find you the perfect match.

If the conveyor tensioning system employs a counterweight design, a slow-speed electric winch is recommended for maintenance operations. Thern’s large 4HBP and 4BP winch families are an ideal fit combined with a simple single-speed control. Thern can customize the size of the winch to match the required load and travel distance, as well as the available fleet distance. If the conveyor tensioning system requires a “constant tension” type winch, Thern’s 4HBP electric winches can be provided with high HP motors and fast rope speeds/reactions to maintain steady conveyor tension/operation. Constant tension applications typically require motor encoders, motor coolers, and sophisticated custom VFD controls. Available grooved drums provide repeatable travel distance and accurate position monitoring.

Yes, many of our 4HPF/HBP winches are designed with dual drum compartments for dual ropes. Such electric winches typically also feature grooved drums to provide highly repeatable and synchronized rope/load travel distances. Drum-mounted rotary limit switches ensure accurate positioning every time.

Draglines generally fall into two categories. Most are based on standard lifting cranes that have been modified for the task of pulling or scraping large amounts of material. These “crawler type” cranes have an electric winch added to the front of the equipment that functions as the dragline. The other type of dragline is so massive and purpose-built that they have to be constructed on-site and will never leave the location where they are constructed. Smaller draglines are typically used to support civil engineering projects, such as road construction and canal dredging, while larger draglines will be dedicated to mining operations.

Thern’s industrial-duty 4HPF/4HBP Series electric winches are available with a wide range of load ratings and speeds. They are also easily customized for varied drum capacities to match required process factors. Hydraulic-powered versions are also available.

Industrial-duty Thern winches are an ideal match for repeating open/close furnace door processes. Our electric winches can be custom designed with multiple drum compartments for proper rope alignment to the furnace door size and lifting points. Grooved drum features provide uniform and repeatable pay-in/payout rope travel distances. Winches are available for a wide range of load ratings and speeds.

Thern’s industrial-duty 4HPF/4HBP Series electric winches are available with a wide range of load ratings and speeds. They are also easily customized for varied drum capacities and/or to match other required process factors. When desirable, an optional clutch feature will allow the free spool of rope.

Two-way movements of rail carts are typically accomplished by means of a “closed-loop” rigging system, controlled by a single electric winch. Thern recommends closed-loop type systems for several reasons: 1) These systems provide a high degree of safety, as the load movement is always constrained by the electric winch. This is of particular importance if any grade exists. 2) The pull rope does not need to be manually pulled out to reach hook points. The electric winch is operated to run the rope and/or hook to the desired location, improving efficiency and ergonomics. 3) The need for reversing the load may not be initially anticipated, but when an over-shoot occurs, the closed-loop winch system can easily reverse the cart for optimum positioning!

Thern’s industrial-duty 4HPF/4HBP Series electric winches are available with a wide range of load ratings and speeds. They are also easily customized for varied drum capacities to match required process factors. These winches pair well with single- or variable-speed electrical control systems to provide optimal control of the floating dredge system.

Thern provides winches for a variety of mining applications. Mine winches can take on several tasks from MRO to cart pulling to conveyor take-up and tensioning. Some of our customers utilize our products for drag lines and dredging, while others will use them for shaft sinking and plumb bobs.

Floating dredges vary greatly in size and purpose. The largest systems are typically utilized for underwater mining, while small and mid-size floating dredges can be used for a variety of purposes from environmental restoration of beaches and marshes to removal of contaminated soils and maintenance of water treatment ponds. Electric winches provide multi-axis positioning of the dredge within the project, holding the dredge in position during operations, then allowing remote or manned repositioning of the dredge to continue work within the site.