RAMP-SHAFT MELTING FURNACE
GM-K SERIES
The GM-K Series is a gas-fired aluminum ramp-shaft melting furnace built for central melt rooms handling both large and conventional charge forms. Its ramp preheats and melts aluminum sows, T-bars and ingots; the shaft receives ingots, clean returns and suitable prepared scrap through an automatic charging elevator. This aluminum combi melter supports flexible charging when feed size and production demand change. Operators can use the ramp, the shaft, or both melting paths, with PLC and color-HMI control.
TECHNICAL OVERVIEW
For an aluminum foundry receiving large-format aluminum feedstock, the GM-K is both an aluminum sow melting furnace and a T-bar melting furnace: the ramp accepts charge forms that may not suit the shaft opening, while the shaft handles ingots and clean returns. As an aluminum sow and T-bar melting furnace, it can combine ramp melting of sows and T-bars with shaft melting in the same production cycle. Energy recovery from exhaust gases preheats incoming charge; the actual fuel use and melt rate depend on alloy, charge condition, loading pattern and operating practice.
A gas-fired aluminum ramp melting furnace is useful when large aluminum charge melting must coexist with conventional ingot and return-metal charging. The GM-K combines ramp preheating and shaft preheating so a plant can choose the route suited to each clean charge form. Limiting unnecessary door opening and managing temperature, residence time and skimming can support high metal yield and low metal loss by reducing oxidation and dross. Those outcomes are operating targets, not guaranteed percentages; compare charged and recovered metal over representative runs.
The GM‑K Series combines high‑efficiency melting technology with rugged industrial design. Key features include a ramp‑shaft preheating system, high‑performance gas burners, and a large melting chamber engineered for rapid heat transfer. The furnace’s closed‑door operation minimizes oxidation and improves fuel efficiency, while automated temperature control ensures consistent melt quality. Its durable refractory construction supports long service life and reduced maintenance requirements. With lower emissions, reduced fuel usage, and superior melt cleanliness, the GM‑K Series is an excellent solution for foundries and die‑casting plants focused on productivity, cost reduction, and high‑quality aluminum output.
MULTI-PURPOSE MELTING
Melt Virtually Anything Your Want.
Flexible furnace charging is the GM-K advantage: use the ramp for sows, T-bars and other suitable large-format charge, and the shaft for ingots and prepared returns. The independent melting zones can be used one at a time or for simultaneous ramp and shaft melting when production demand calls for both paths. Charge geometry, cleanliness, moisture, alloy segregation and safe loading access must be checked before the operating route is set.
POUR, DIPOUT OR LAUNDER
Three Options To Meet Your Needs.
Choose from a pneumatic tapout spout, a dipwell, or our electric launder system. Our GM-K Series gives you 3 options.
LASER LEVEL MONITORING
Precise and Dependable Molten Metal Level Measurement.
Probe type molten metal level sensors can corrode and be affected by dross buildup, and in time they can give back false readings. Our laser level system is no contact, precise, dependable, and durable, and offers long term maintenance free operation.
LARGE PRE-HEAT RAMP CHARGING DOOR
Easy Loading Access.
This model features a large electric drive charging door on the other end of the furnace for loading sows, T-bars and ingots on the pre-heat ramp.
AUTOMATED CHARGING
Eliminates Tedious Charging and Simplifies Operation.
The other end of this furnace features a shaft melter with an automatic elevator which has a tilting cart for ingots, returns and scrap. The carts are inserted at the bottom with various types of aluminum material and the cart travels up, the shaft melting lid is opened and the cart dumps the load, and returns to the bottom. The cart is pulled out and another full cart is loaded.
INFRARED STACK LEVEL SENSOR
Optimized Shaft Filling.
This furnace features an infrared sensor which monitors the level of material in the melting shaft. Once the correct level is achieved a signal is sent to the elevator to sent the cart up with more material. The system ensures optimized filling for maximum performance.
HIGHEST RETURN ON INVESTMENT
We Give You More Furnace for Your Money.
To be competitive today’s economy requires that manufacturers run their operations more efficiently and cost effectively than ever before. We offer the highest ROI (return on investment) in the industry. Dynamo gives you high-quality products for a reasonable investment and with more features than any other company. Simply put, we give you the most for your money!
TWO SIDE CLEANOUT DOORS
We Made Furnace Cleaning Easier.
The two side cleanout doors and the large pre-heat ramp door give the operator easy access to all parts of the furnace interior for easy cleaning. There are no blind spots to deal with. All this encourages regular furnace cleaning.
HIGH THERMAL EFFICIENCY BY DESIGN
We Add Significantly More Insulation to Our Furnaces Than Most Manufacturers.
Additional insulation is intended to reduce heat loss and gas use per ton of aluminum under suitable operating conditions. The outer shell can still become hot; operators should follow hot-surface precautions rather than assume it is safe to touch.
THICKER INSULATION
We Add Way More Insulation to Our Furnaces Than Most Manufacturers.
The result is even greater efficiency and a solid, sturdy construction which is hard to beat.
EASY TO OPERATE INTERFACE
Greater Control - Means Greater Efficiency.
CHOOSE YOUR CONTROL SYSTEM
We Give You Options of PLC & HMI.
Select the control system that is best for you and easiest for your maintenance team.
THREE AIR BLOWERS
Three are Better Than One.
Using triple air blowers gives us more flexibility and precision in the amount of air available for the shaft melting, ramp pre-heating and holding chambers at any given time. When balanced correctly they increase the efficiency of the furnace and reduce running costs.
VFD DRIVE BLOWER MOTORS
Better Efficiency and Lower Operating Cost.
Lots of air without control wastes a significant amount of energy. We use VFD Drives combined with Premium Inverter Duty Motors to give you greater RPM only when it is needed. All this translates into greater efficiency, lower operating costs, quieter operation, soft start and longer motor life. The advantage is clear. This is just one of the many ways we use to increase furnace efficiency, and reduce long term operating costs.
SHAFT ELEVATOR CONTROL
Simplifies Elevator Loading.
All the controls needed to operate and load the shaft elevator with carts are on a separate panel located right on the elevator.
AIR MANIFOLD
Complete System Included.
The furnaces comes with a dependable air manifold that is properly scaled for the pneumatic air cylinder which operates the shaft melting cover. Air is used also to keep the shaft level sensors clean and clear.
ARTICULATING CLEANOUT DOOR PANEL
Simplifies Furnace Cleaning.
Allows the opening and closing of both side cleanout doors with a clear view of the doors. The panel is located conveniently and can be pushed out of the way when not needed.
QUICK CONNECT
Fast Onsite Connection.
Our quick connection plugs eliminate onsite wiring errors and allow for quick onsite furnace assembly and future maintenance. It is one of the little things that count and make our furnaces different.
HIGH QUALITY COMPONENTS
We Use Brand Name Components You Know and Already Use.
We use only the finest quality components that are open source and readily available locally in your area, or from our online parts store.
REMOTE SERVICE
We Can Remotely Troubleshoot Your Furnace from Our Facility.
Our GM-K Series ramp-shaft melting furnaces include a Remote Connectivity Unit which allows our furnace technicians to remotely check the performance of the furnace, make any needed changes to the program or HMI, or to troubleshoot it directly from our service center. The customer is only required to connect the unit to the Internet via an Ethernet cable. We handle the rest.
INDUSTRY 4.0 REMOTE MONITORING
Remotely Monitor Your Furnace Performance From Any Device.
As an option, all our furnaces are available with Industry 4.0 remote performance monitoring units which feature a custom dashboard. You can not only monitor furnace performance, but you can be notified before an issue occurs. Included are condition based maintenance reminders and shift performance statistics. Minimize impact of emergencies and maximize furnace uptime, and productivity. See what is going on with the furnace and your production from any device, anywhere in the world.
THREE STANDARD SIZES
Flexible Range of Applications.
Available from 4,400 lbs melting per hour all the way to 8,800 lbs, the GM-K Series ramp combi melting furnaces can handle almost any melting application.
| Standard | US / Imperial (Al) | Metric (Al) | ||
| Model | Holding | Melting/h * | Holding | Melting/h * |
| GM-K-11000 | 11000 lb | 4400 lb | 5000 kg | 2000 kg |
| GM-K-18000 | 18000 lb | 6600 lb | 8000 kg | 3000 kg |
| GM-K-24000 | 24000 lb | 8800 lb | 11000 kg | 4000 kg |
Applications For The GM-K Series Aluminum Ramp-Shaft Melting Furnace
The GM-K supports high-volume foundries that receive both sows or T-bars and standard ingots or returns. Rather than selecting a furnace from nominal capacity alone, plan ramp-door clearance, shaft charge size, average and peak melt demand, holding reserve, and discharge route. For the broader planning method, read Dynamo's ramp-shaft melting guide; the GM-K product specifications remain the equipment reference.
Die‑casting operations depend on a stable, uninterrupted flow of clean molten aluminum. The GM‑K Series delivers continuous melting with precise temperature control, ensuring consistent metal quality for high‑pressure and low‑pressure die‑casting machines. Its closed‑door operation minimizes oxidation, while the optimized burner system maintains stable melt conditions during long production cycles.
The ramp‑shaft design allows the furnace to efficiently process a wide range of aluminum feedstock, including scrap, runners, gates, and internal returns. Preheating the charge reduces oxidation and improves melting efficiency, even with lower‑grade or mixed scrap. This makes the GM‑K Series an excellent choice for recycling‑focused facilities and foundries looking to reduce raw material costs.
With its large melting chamber and stable thermal environment, the GM‑K Series supports alloy preparation and melt conditioning. Operators can add alloying elements, degas the melt, and maintain precise temperature control before transferring metal to casting equipment. This ensures consistent alloy composition and improved metallurgical quality for demanding casting applications.
The GM‑K Series is ideal for high‑volume casting operations that require continuous, reliable molten aluminum supply. Automotive and aerospace foundries benefit from its fast melt rates, low emissions, and stable temperature control. The furnace’s efficient burner system and durable refractory lining support long operating cycles, making it suitable for demanding industrial environments.
The ramp‑shaft preheating system significantly reduces fuel consumption, making the GM‑K Series a strong fit for facilities focused on lowering operating costs and improving energy efficiency. By capturing waste heat and minimizing heat loss, the furnace delivers superior thermal performance with reduced emissions. This application is especially valuable for foundries seeking to improve sustainability and reduce energy‑related expenses.
Frequently Asked Questions About The GM-K Series Aluminum Ramp-Shaft Melting Furnace
A ramp‑shaft melting furnace provides significantly higher thermal efficiency and faster melting rates compared to traditional reverberatory or crucible furnaces. The GM‑K Series uses a sloped ramp and vertical shaft to preheat aluminum feedstock with exhaust heat, reducing fuel consumption and shortening melt cycles. Because the furnace operates with minimal door openings, heat loss and oxidation are greatly reduced, resulting in cleaner metal and lower dross formation. This design makes the GM‑K Series ideal for high‑volume operations seeking lower operating costs and improved melt quality.
The ramp is designed for large sows, T-bars and ingots; the shaft can receive ingots, clean foundry returns and suitable prepared scrap. This is flexible charging, but not permission to put wet, oily or incompatible mixed scrap into the furnace. Verify charge size, alloy compatibility, moisture and contamination before choosing a loading route.
The furnace’s closed‑door operation and optimized burner system maintain a stable, low‑oxygen melting environment. Preheating the charge in the ramp‑shaft reduces thermal shock and minimizes oxidation during melting. The controlled melting process prevents excessive turbulence, reducing oxide formation and improving metal cleanliness. These features collectively lower dross generation, enhance melt quality, and improve casting performance.
Yes — the GM‑K Series is specifically designed for continuous, high‑throughput aluminum melting. Its large melting chamber, efficient burner system, and stable temperature control support long operating cycles with minimal downtime. Foundries and die‑casting plants benefit from its ability to deliver a steady supply of molten aluminum with consistent temperature and quality, making it ideal for high‑volume production environments.
Yes — GM‑K Series aluminum ramp‑shaft melting furnaces are available throughout the United States, Canada, and Mexico. Foundries, die‑casting plants, and aluminum processors across North America rely on these furnaces for efficient melting, reduced fuel consumption, and consistent metal quality. Regional availability ensures faster delivery, dependable technical support, and access to replacement parts. Units can be configured with various capacities, burner systems, and automation packages to meet specific production requirements.
DIFFERENT SIZE?
Let Us Make One for You.
Tell us your requirements and we will be glad to work with you to give you exactly what you need.
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