Sphalerite Depressant D411 for Mineral Processing High-efficiency chemical depressant specifically designed for copper sphalerite ore beneficiation and mineral separation processes. Product Function This high-efficiency sphalerite depressant is specifically formulated for: Copper-zinc separation in mineral processing Lead-zinc separation operations Sphalerite corrosion inhibition Flotation of copper, lead, and other valuable minerals Packaging Specifications 25kg per bag