It is estimated that between 7 and 7.5 million metric tons of steel slag is produced each year in the United States. Even though it can be recycled, slag is frequently sent to landfills for disposal. Slag is a byproduct of steel production and is comprised of a complex solution of silicates and oxides that congeals upon cooling. Slag is produced during the separation of the molten steel from impurities in a blast furnace. Slag is highly alkaline, with a pH between 9.5 and 11, and does not retain enough water for plants to germinate.

The procedure for cleaning up a site where slag has been disposed of can vary depending on many factors. It can be extremely costly, and some of these sites end up labeled as a Superfund, due to their high environmental threat levels.

Remediation Process

  • Environmental assessment
  • Removal of soil and debris
  • Disposing in a hazardous waste facility
  • Capping contaminated sediments with clean sediments
  • Erosion protection
  • Habitat restoration and redevelopment

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Case Studies

Southeast Ferrous Foundry

A ferrous foundry, located in the Southeast, has been using EnviroBlend CS Bulk and super sacks to treat lead and cadmium-contaminated dust from the cupola furnace for over 15 years. EnviroBlend is added in-line [...]

Southern US Ferrous Foundry

A ferrous foundry located in the southern US switched its heavy-metal waste treatment reagents from Bantox to EnviroBlend CS. EnviroBlend now helps them annually treat over 500 tons of lead and cadmium-contaminated ferrous dust [...]