Molten metals appear in various applications, either as part of the steelmaking process itself or in manufactured goods. While still in liquid form, molten metals get refined and processed according to the chemical and metallurgical specifications that determine their final characteristics.
We process and distribute industrial mineral products to the foundry industry, including bentonite clays used for binders in the foundry molding industry. This segment also sources and distributes a full offering of resin-coated sands, riser sleeves, and feeding aids.
We apply our knowledge in producing products for treating steel toward other metallurgical processes as well. Opta offers solutions for the treatment of liquid metals in a variety of foundry applications.
Products for Cast Iron Foundries
Modern automotive and machinery industries require cast iron and steel components with mechanical properties that meet highly demanding applications. Foundries meet those demands by melting iron or steel and molding or casting the liquid into desired shapes. During the liquid phase, the metal’s characteristics can be enhanced and improved by treating it with granulated or wired materials.
Iron foundries often apply magnesium cored wire to produce ductile iron (through the transformation of flake graphite into spheroidal graphite). Cored wire allows for accurate application, making it especially suitable for producing compacted graphite cast iron. Opta products provide a fully automatized treatment solution for ductile and grey iron.
Opta products assist in desulfurizing cast iron in the so-called cupola furnaces melting processes. Here granular products made of calcium oxide, calcium carbide, calcium fluoride, and others get applied.
Products for Other Foundries
Bentonite, Carsins, and Premix 46-B
Foundries use Bentonite when pouring metal cast molds. The clay withstands higher temperatures, and excessive heat will not cause it to lose its chemical structure. Iron ore manufacturers add Bentonite to crushed taconite to form pellets for transport to steel mills. Opta stocks the Western sodium and Southern calcium types of Bentonite.
Carsin is a blend of various carbonaceous materials with remarkable potency for developing a high-level lustrous carbon. Penetration of molding sand by molten metal can produce defects commonly referred to as “Burn On” or “Burn In.” The addition of Carsin to the sand helps produce properly balanced molding sand and castings with good, clean finishes. Carsin reduces cleaning work and improves casting machinability.
Recommended additions of PREMIX 46-B for new sand is 7 to 9 percent based on the sand weight. The higher level additions are for fines sands of AFS grain fineness number greater than 80 and production of more massive castings. Water requirements are 2.5 to 3.5 percent based on total sand weight. The variation in water requirements relates to the fineness of the base sand and the percentage of bond used.
Opta is the authorized distributor for HA International and provides the North American foundry industry the most comprehensive range of products in three market segments:
- Resins systems for bonding sand
- Resin-coated sand (RCS) for the shell process
- Refractory coatings
Resin Coated Sands, available from Opta Minerals, include products for general purpose, aluminum, low nitrogen, and specialty coated sands such as zircon. Refractory coatings include products for iron, steel, and lost foam applications, as well as foundry ancillary products such as adhesives and release agents.
We feature and stock the following HAI products: Shell Resins, Phenolic Urethane Cold Box (PUCB), Phenolic Urethane No Bake (PUNB), Warm Box System, ALpHASET, BIOCUREX, BETASET, No-Bake (FNB) Acid Cure Systems, and MSDS.
Riser sleeves and feeding aids from Kore Mart provide the casting quality and metal yield you deserve and need to maximize your productivity and control costs. We manufacture premium riser sleeves along with the feeding aids you’ll need to improve the performance of your risers by preventing shrinkage in the casting.
We provide several different types of insulating and exothermic riser sleeve formulations. Our top-quality risers are for use with all molding systems, and for any molding machine that you might be using. We offer blind risers and open risers, pour cups, and breaker cores.
Keep your risers liquid longer with our feeding aids, which reduce heat loss or provide added heat for your exothermic materials. Ultimately, the right feeding aids for your risers could lead to better cost savings from high foundry yields and increased productivity. Our feeding aids include a variety of hot toppings for your insulating and exothermic risers.ts: Shell Resins, Phenolic Urethane Cold Box (PUCB), Phenolic Urethane No Bake (PUNB), Warm Box System, ALpHASET, BIOCUREX, BETASET, No-Bake (FNB) Acid Cure Systems, and MSDS.