High temperature Solutions – Foundry

Green Sand Bonding Technologies


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IMERYS is a pioneer in the development of the PREMIX, conventional molding sand binders formulated with various clay products, various organic and inorganic additives. IMERYS's modern blending equipment permits the necessary sand additives to be mixed according to the customer's specific formula. The blending method provides foundries with the ability to adjust and control additive requirements for the entire range of cast metal production to meet the expectations of the future.


Water is THE essential component in the activation of bentonite used to bond in the green sand process. While necessary to activate the clay, free moisture, not tied up in the bentonite platelets structure is the enemy of metal. If it exists the free moisture can cause significant casting defects.

With IMQUICK® IMERYS has developed a patented, bentonite based formulation which includes finely sized industrial mica. As part of a premix formulation the added mica provides lubricity, which allows for better sand flowability in the molding process, better compaction and more consistent mold hardness; all of this without the need for additional moisture. In fact, if reduced moisture is your goal it's possible to run lower moisture percentages with IMQUICK® versus most conventional premix formulas.


Foundries constantly have to produce good castings in the most efficient way while keeping the burden on environment and workplace at minimum levels. The know-how of the processes taking place inside the molding sand led IMERYS to the development of ENVIBOND®, a bentonite-based system of molding sand binders. This formulation is far more efficient at consuming the gases which greatly reduces smoke and hazardous organic compounds. ENVIBOND® can also reduce seacoal by 30%–90%.


  • Reduced emissions & odors up to 95%
  • Reduced consumption of molding sand binders
  • Cleaner air at the workplace with less air filtration
  • Increased molding sand recyclability
  • Better casting surface quality
  • Reduced environmental-related investments

ENVIBOND® is available as a pure inorganic binder system or as a blend in combination with proven IMERYS additives and is added to the molding sand like a traditional molding sand binders. ENVIBOND® is not classified as a hazardous substance and has an unlimited shelf life.


For those foundries that prefer to buy bentonite, seacoal and other additives separately and blend in-house IMERYS has QuickCol. It's the same high purity, low sulfur coal we’re known for, but with the addition of mica made in the coal processing operation. This provides foundries with the opportunity to take advantage of the Quick technology and still blend in-house.


IKOBOND® is the newly developed patent pending clay technology designed for superior durability for high density molding. The strengths generated allow quicker sand development, optimizing consumption.

A special blend of bentonite with a small percentage of high refractory clay that improves thermal expansion results reduces the amount of bentonite burned out in the process, resulting in better mold integrity and strength.


This technology incorporates magnesium oxide to provide for higher green strength and lower dry strength in a 100% sodium bentonite formulation. The product has been shown to reduce scrap rates, improve sand properties and shorten casting shot blast times. The IMERYS solution incorporates vertal magnesite (magnesium rich mineral) provides improved shakeout without the need for calcium bentonite. Patent pending.


Carbonites have been developed by IMERYS as a unique family of Carbonaceous Additives that support molding sand (some of these include): Carbonite® SA and Carbonite® RSB


ANTRAPEX® - Core Sand Additives

ANTRAPEX® is a service-proven core sand additive that positively influences both the core and the bentonite-bonded molding material. The additive is mixed with core sand and thus contributes to reducing expansion and penetration defects. After core breakdown, ANTRAPEX® passes into the molding material where it has a positive effect on the casting surface and sand stability.

RIKO® - Recovery Materials

Bentonite Recovery from Foundry Dust

RIKO® Dust collection on your sand preparation, shakeout and return sand are an absolute necessity. Especially with the more demanding Permissible Exposure Limits instituted by the USEPA. With it comes the extraction/loss of useable materials including active clay and good carbon. Our patented RIKO® process recovers useable clay and carbon from dust collector fines, returning this valuable material into the green sand system.

Active clay in the dust collector is largely bonded to fine sand particles. The high surface area of these fines and the bonding strength of bentonite make separation of real challenge. Our patented water based process uses high shear agitation, hydro-cyclone separation and dynamic screening to separate the constituents. The result is an 83% recovery of clay and carbon. The resulting slurry is used at the mixer/ muller as a portion of the water and bentonite addition for the system. The pre-hydrated clay provides for easier mixing, faster sand property development and quicker sand system changeover when switching castings on the mold line. The slurry produced is sizably less expensive to produce versus the delivered price of conventional dry bentonite premixes.

See 3D Model

SLAGBUSTER® - Slag Coagulant

SLAGBUSTER® is made out of granular, non-metallic material specifically designed to remove slag in molten metal applications. Any slag present on the molten metal will adhere to SLAGBUSTER® and continue to float. The combined slag/ SLAGBUSTER® can then be removed from the molten metal in large pieces, resulting in clean molten metal for thecasting process.

Custom Bentonite Solutions

Unlike others, IMERYS is not locked to a specific bentonite reserve. This provides us with the opportunity to source bentonite both domestic and international. We have spent the last two years investigating different geological formations and the resulting bentonite's applicability and performance in metal casting applications. Using these differing clay types we can customize a solution specific to a foundry's need.