Articles
Understanding Rotary Degassing of Aluminum
Rotary degassing is a critical process in aluminum casting to remove dissolved hydrogen and impurities from molten aluminum. Dissolved hydrogen, if left unchecked, forms bubbles during solidification, leading to porosity in the final casting. This porosity negatively affects mechanical properties, reducing strength and ductility.
Aluminum Degassing Methods - Picking the Best Method
There are six commonly recognized methods of degassing aluminum. These are briefly discussed below along with the pros and cons of each method.
Transfer Pump Types
Closed, Dual Position, and Open Style transfer pumps are available in a range of sizes to accommodate any applications.
Intelligent Control for the Smart Foundry
Nearing the quarter of the 21st century, it seems technology is advancing faster and faster every year. Why shouldn’t your facility advance too? This post will provide some options for you to consider as you’re researching, designing, and improving your process.
Low Air Flow Freezes Pumps!
The primary reason for molten metal pump freezing is "slow starts." A slow-start is defined as slowly increasing the motor RPM. When a transfer pump is slow-started, the hot metal flows gradually into a cooler riser. As the metal temperature decreases, it solidifies or freezes inside the riser. This slow-start condition typically results in permanent damage and the need to rebuild the pump or at the very least replace the riser.
Expertly Optimized Solutions
High Temperature Systems, Inc. partners with melt department managers, supervisors, and engineers to craft complete solutions and solve problems that are beyond the reach of industry off-the-shelf solutions. Drawing from our standard product lines and more than 50 years of experience, we can craft solutions unique to your applications and furnace implementations. These solutions encompass aluminum, zinc and lead operations from die casting to galvanizing.
Impeller Types and Purposes
We offer three different types of impellers for many of our molten metal pumps. (The impeller is the vaned wheel that spins inside the pump base.) The impeller and its interaction with the pump base (and base volute) largely determine the performance characteristics of a given pump design.
Circulate Continuously - Transfer on Demand
The ideal solution for these furnaces would be a single compact pump that performs both the circulation function and the transfer function. Such a pump would require a mechanism to redirect the output of the pump impeller to either a circulation nozzle or a transfer riser.