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Foundry Sand Additives

CUSTOM FORMULATED SAND ADDITIVES

Unlike most “one-size-fits-all” sand additives, we continue to work with our customers to develop the most effective formula at the lowest cost for their specific application.

MACOR SAND ADDITIVE

PRODUCT DESCRIPTION

Core and mold sand additive available in organic, inorganic, and mixed system formulations designed to eliminate casting defects related to veining, gas, and metal penetration.

SUGGESTED USE

Grey and ductile iron, steel, and non-ferrous alloys.

APPLICATION

Most commonly used between 1-3% of total weight of foundry sand mixes. Successful in cold-box, green sand, no-bake mold facing, and no-bake cores.

PACKAGING

1,300lb bulk sacks or 50lb bags.

FORMULATION

Unlike most “one-size-fits-all” sand additives, we continue to work with our customers to develop the most effective formula at the lowest cost for their specific application. This includes proven versions with varying levels of red or black iron oxide, formulas with targeted LOI and several inorganic formulations. Please contact your REFCOTEC representative for additional information.DOWNLOAD BROCHURE

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REFCOTEC Sand Additives
Macor Sand Additive Results

Advantages

  • Reduces or eliminates veining and gas defects in cold-box and no-bake applications.
  • Eliminates need for expensive specialty sands.
  • Relatively low addition rates when compared to alternatives.
  • Up to 78% reduction in thermal expansion when added to silica molding/core sands.

GREEN SAND ADDITIVES

PRODUCT DESCRIPTION

OPTIMULL is an engineered liquid green sand additive that will help the foundry better control their sand. It will increase the foundry’s mulling efficiencies, giving you nearly 100% activation of your available clays. Since OPTIMULL increases the effectiveness of your binding system, you will see better mold stripping, increased sand flowability and better sand separation at shake out. With the addition of OPTIMULL you will also see better results in the cleaning room since less moisture is required to activate your clays.

OPTIMULL changes the way water works with the clays. It is a blend of water soluable organic and inorganic materials. OPTIMULL reduces the surface tension of water enhancing the water/bentonite interaction, which allows the water to penetrate the clay more readily. This interaction allows the clays to attain the highest level of development without creating stickiness or loss of flowability.DOWNLOAD BROCHURE

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Macor Sand Additive Results

Advantages

  • Faster activation of clay (better mulling efficiency)
  • Nearly 100% activation of clay (iron foundries usually have between 65 and 80% activation)
  • Low temperature parting (better mold stripping)
  • High temperature parting (better sand separation at shakeout from the metal)
  • Increased sand flowability (better mold corners and lettering)
  • Lower moisture to reach target compactability (reduced moisture defects, better blowability, reduced cleaning room time)