Understanding Your Market Needs

Pyrometallurgy is a wide family of high temperature processes to recover metals from ores, concentrates and recycled by-products. Raw materials are converted to oxides or directly decomposed at high temperatures. Typical examples of pyrometallurgical processes are: 

  • Copper smelting from sulphidic ore concentrates.
  • High temperature nickel recovery from sulphidic ore concentrates.
  • Zinc extraction from steelmaking by-products in the Waelz process.
  • Smelting of chromite ore at ferrochrome production by the Perrin process.
  • High temperature sulphate roasting of lithium ores (hard rock).

Metals are recovered and impurities are removed in the molten phase. Fluxes (slagging agents) are required to enable impurities by slagging. Many types of reagents are used to capture either the recovered metal or impurities in high temperature decomposition processes. All chemicals used in pyrometallurgical processes must be used at high purity and consistent quality, in order to ensure consistent and efficient metal recovery.

Solutions to Meet Your Needs

Lime and limestone provide multiple functionalities in pyrometallurgy, such as:

  • Enabling the slagging process in copper smelting and Waelz zinc recovery.
  • Facilitating the chromite ore smelting.
  • Capturing sulphur dioxide in sulphide roasting of lithium ores.
  • Capturing acid pollutants from pyrometallurgical flue gases. 

Carmeuse supplies high quality lime and limestone reagents for pyrometallurgical processes, for both the core metal extraction/refining and for industrial flue gas treatment from metallurgical plants.

  • Quicklime.
  • Hydrated lime.
  • Ground limestone and dolomite.
  • Milled limestone and dolomite.

Mining & Non-Ferrous

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metal ore rocks
Ore Processing