Dust, Smoke & Fume Collection for Foundries
Filtration Solutions for Contaminate Control in Foundry Processes
Reliable Dust Collection & Explosion Mitigation for Foundry Processes
AST Canada supplies reliable dust collection, fume and smoke extraction, and combustible dust mitigation solutions to fit a variety of foundry processes in the metalworking industry.
With several decades of experience engineering dust collection systems, AST Canada is the name you can trust above all others for solutions to dust, mist & fume collection plus fire & explosion mitigation in industrial settings.
Foundry Operations
Foundries were one of the first industries to use local exhaust ventilation to control contaminants in the workplace and provide protection for the environment. Foundries continue to lead in this area today and Donaldson Torit® dust collectors provide the advanced filter technology required to do so. Donaldson Torit dust collectors are installed in hundreds of foundries worldwide exhausting furnaces of all types, mold making and break-out, pouring, casting, and finishing operations.
Applications
Foundry Processes
The word “Foundries” encompasses a broad group from large multi building facilities that melt iron to cast counterweight blocks for cranes weighing hundreds of tons to a single room where precious metals are melted and cast into intricate shapes for jewelry. In general, most have the following common processes:
- Sand handling
- Metal melting
- Mold pouring
- Casting cleaning
Sand Handling
This includes storage and handling of new sand, equipment to separate the castings from the molds, handling and reconditioning of the used sand for future reuse; i.e, shake-out or knock-out, mechanical and pneumatic conveying, bucket elevators, mixers and sand coolers.
Metal Melting
There are a number of furnaces widely used in the ferrous and non-ferrous foundries. These include induction, electric arc, reverb, rotary, cupola, crucible and open hearth furnaces. It is essential that exhaust volumes are sufficient to control generated fume. Heavy fume generation during charging, the initial melt stage and any refining may increase the air volume required and consequently the collector size. Dirty scrap with oils or paint compounds the fume generation during charging and the initial melt and may require the addition of filtration aids to prolong filter life. Fumes include metal oxides, but the smoke resulting from contaminants such as oil and paint, unburned hydrocarbons, and products of combustion including moisture and fluxes used during the refining process produce hygroscopic salts that may compromise the life of any filter media.
Pouring
Heavy concentrations of metal oxides are produced when the molten metal is exposed to the oxygen in air during the pour. The heat released during a pour creates high heat rise velocities making close capture of fume a hooding challenge so careful air volume management is critical.
Casting Cleaning
After the metal casting is broken free from the mold, it is necessary to remove excess sand. In the blast room the castings are subjected to abrasive blasting or put through a barrel tumbler where the action of the sand or shot impinging on the casting loosens the adhered sand and cleans the casting surface. The cleaned casting may be subject to further processing such as grinding, chipping or machining.
Cartridge Collectors in Foundry Applications
AST system designs traditionally use collectors like the Donaldson Torit RF Series, Modular Collectors like the Baghouse and Dalamatic® which have been the collectors of choice for foundry applications for a long time. With increasing limitations on emissions and continuous improvements in cartridge technology, more and more Donaldson cartridge collectors (DFE and DFO) are being used as furnace fume, pouring and casting cleaning collectors.
Related Products
Cartridge
Downflo® Evolution
The Donaldson Torit® Downflo® Evolution (DFE) cartridge dust collector is capable of reducing equipment size and the number of required filters by up to 40%.
Downflo® Oval
The Donaldson Torit® Downflo® Oval (DFO) cartridge dust collector is a compact, high-efficiency unit that use oval-shaped filters suited for filtering submicron dust.
Baghouse
Dalamatic®
The Dalamatic® baghouse dust collector uses Dura-Life™ envelope-shaped bag filters, providing greater movement to dislodge dust cakes during pulsing.
Modular Baghouse
Donaldson Torit® Modular Baghouse dust collectors deliver reliable, efficient, continuous-duty, pulse jet operation in a compact design with easy maintenance.
IoT Enabled with iCue™ Connected Filtration Service
* may not be available on all models
AST Canada has been helping clients find solutions for their unique Dust, Mist & Fume Collection needs for more than 40 years.
We can help you too.
