Harsco Metals & Minerals
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The global leader in metal recovery from slag

Recovering metal from slag is our core business. Harsco's operating experience stretches back over 100 years, when we first starting offering a metal recovery service. Today, we operate metal recovery plants at 81 locations in 26 different countries, more than anyone in the industry.

Before signing a metal recovery contract with a customer, we will take a sample of the slag material and analyze it in the laboratory, to evaluate the potential metal recovery rate and properties of the slag for re-use.

Harsco pioneered metal recovery technology and even today continues to invest in new technology to monitor metal yield, ensuring we provide maximum added value to the customer. Contact us to learn more about our local solutions.

Expertise in slag commercialization

As part of our assessment of the slag material, we will undertake a local market study to understand the full potential of the demetalized slag when sold into local industries. Contact us to learn about how Harsco's specialized aggregate sales force can maximize slag sales in your local area.

Understanding slag types

Slag is a valuable resource for any steelmaker. Integrated steelmakers sell blast furnace slag - which is naturally cementitious in quality - into the cement industry.

In addition, the slag from the BOS plant such as converter slag and ladle slag has useful properties once weathered to allow for expansion of the lime-bearing material.

EAF slag is a strong and durable material which is highly versatile and ideally suited for use as an aggregate in many applications.

The slag derived from stainless steel production presents particular challenges, owing to the handling of fines in its cooled state. Harsco will process Electric Arc Furnace (EAF) and Argon-Oxygen Decarburization (AOD) slag, from austenitic or ferritic grades of stainless steel. We also have solutions for complying with the most stringent environmental regulations, which require additional precautions when handling stainless slag owing to the risk of airborne dust emissions.

The steelmaker benefits from slag recycling by avoiding the cost of landfill. The community benefits, too. Slag is a man-made mineral, therefore its use as an aggregate in place of a natural aggregate product avoids the environmental footprint from quarrying.

Steel slag services

  • Slag transportation, crushing and screening
  • Metal recovery, whereby the recovered steel scrap is screened into different size fractions and returned to the steelmaker.
  • Sale of the aggregate products into local markets for a variety of applications.