Magnesia Product Forms, and Their Applications

Magnesium Hydroxide Slurry – Martin Marietta is North America’s largest producer of synthetic, high purity magnesium hydroxide slurry (Mg(OH)2) for use in industrial and biological wastewater treatment to adjust pH, supplement alkalinity and precipitate heavy metals.  Since FloMag® magnesium hydroxide slurry provides long lasting alkalinity and improved pH control, it can effectively replace lime, caustic soda and soda ash as a neutralizing agent.  In municipalities, Thioguard® magnesium hydroxide slurry can be used to mitigate fats, oils and greases (FOG) as well as odor and corrosion of concrete sewer pipes due to hydrogen sulfide formation in collection systems.  Power utility plants utilize UtiliMag® magnesium hydroxide slurry to mitigate SO3 emissions from boilers and neutralize wet ESP waste streams.  Pulp mills utilize our CellGuard® slurry as a cellulose protector and alkali to replace magnesium sulfate, caustic soda and sodium silicate in both chemical and mechanical pulp bleaching.  Due to their superior stability, our slurries can be transported by either tanker truck or rail tank cars for transport cost optimization.

Magnesium Hydroxide Powder – Martin Marietta’s high purity, chemically precipitated grade of MagShield® magnesium hydroxide powder is designed to provide non-halogenated, non-toxic, and non-corrosive flame retardance and smoke suppression in plastics such as thermoplastic olefin roofing, plastic lumber, and low loading wire and cable applications.  More thermally stable and cost competitive than aluminum trihydrate (ATH) and brominated compounds, MagShield® powder is available in uncoated and coated standard and ultra-fine particle sizes. Our industrial grade MagChem®MH-10, and MagChem®MH-10 LC and ULC (low calcium) magnesium hydroxide powders are particularly suitable for industrial applications such as the production of magnesium salts, ceramic, lubricating oils and fuel additives.  Martin Marietta also produces an NSF Certified powder, FloMag®PWT-MHP, that conforms to NSF Standard 60 for Drinking Water Chemicals.

Lightburn Magnesium Oxide – Our 98% high purity, lightburn magnesium oxide (MgO) is a technical grade that is produced as a fine, white powder.  Martin Marietta manufactures a wide variety of lightburn, industrial MgO grades ranging from low to high reactivity and bulk density.  MagChem® lightburn products are well suited for many chemical reactions requiring a moderate surface area and fine particle size.  End uses include the manufacture of magnesium salts, metal mining (e.g. cobalt, nickel, platinum and copper hydrometallurgy), construction products, fuel additives, oil drilling chemicals, sugar processing, potable water treatment and water desilication in oil sands processing.

Periclase –  Martin Marietta is North America’s largest producer of synthetic high purity deadburn magnesium oxide for use in the manufacture of magnesia carbon refractory bricks used to insulate EAF and BOF steelmaking vessels, lime & cement kiln refractory brick, monolithic gunnable refractories, castables, oil drilling muds & chemicals, dental investments, road patching cements, and glass manufacture (e.g.  liquid crystal display (LCD) glass). The Company’s several grades of periclase are available in bulk and sized fractions.

Specialty Magnesium Oxide –  Specialty magnesium oxides ranging from medium reactivity to high reactivity are produced at our Michigan and Ohio plants for various applications requiring high performance and maximum consistency in chemical and physical properties as well as reactivity.  MagChem®20SC is a medium reactive, micronized MgO formulated to act as an electrical insulator in the annealing step of silicon grain oriented steel for high performance electrical transformers.  Our high surface area MgO product, Elastomag® delivers the precise predictability needed in rubber compounding.  Elastomag® is manufactured to exact specifications in order to provide consistent performance as a scorch retarder in fluoroelastomers, neoprene and adhesives, as a thickening agent in sheet and bulk molding compounds, and as an acid acceptor in halogenated polymers. Martin Marietta also produces a food grade MgO, Marinco®FCC, for use as an additive for powder mix desiccants, color retention, pH modification in beverage manufacturing, food contact sheet molding compounds, and as a magnesium supplement.  Our specialty magnesium oxides are available in various package sizes to meet the customer’s needs.