Hatch’s Pyrometallurgy and Hydrometallurgy Groups have years of experience in process design and operations in lead, zinc and tin smelting, and refining.

• Process Expertise – Lead
  • Blast furnace and ISP
  • Oxygen smelting (OKO, Kivcet, QSL)
  • Hot metal handling
  • Lead matte granulation
  • Smelter gas handling systems
  • Clean plant design
  • Acid plants and oxygen plants
• Process Expertise – Zinc
  • Concentrate handling/drying/roasting
  • Imperial smelting process
  • Single-stage and two-stage pressure leaching
  • Sulphur recovery from leach residue
  • Zinc electrolyte purification
  • Zinc electrowinning
  • Automated slab and block casting
• Process Expertise – Tin
  • Primary and secondary processing
  • Reverberatory furnace smelting
  • Electric arc furnace smelting
  • Pyrometallurgical refining
  • Refining by continuous crystallization
  • Alloying and casting

Hatch also provides specialized experience in the following process design and engineering areas:

• Process Design and Development
  • Process selection
  • Pilot plant design, operation, evaluation and scale-up
  • Design basis and process criteria
  • Process modeling
  • Equipment selection and sizing
• Engineering, Design and Construction
  • Conceptual and feasibility studies
  • Basic and detail engineering
  • Engineering, procurement and construction management services
  • Commissioning and startup assistance