Lead-Silver Vacuum Distillation Furnace

For Pb-Ag Alloy & Crude Lead Precious-Metal Enrichment

Industrial Vacuum Metallurgy System · Zero Emission · No Metal Loss · Customizable Capacity

√Accepts lead-silver alloy and crude lead (Ag ≥ 0.1%)

√Vacuum high-temperature distillation: operating range 850℃ – 2600℃

√Equipped with vacuum-sealed hearth – zero off-gas emission, zero metal loss, eco-friendly solution

√Power rating: peak 200 kW; normal operation 70 – 120 kW

√Main outputs: crude silver (Ag 95–98%), Pb-Ag alloy (Ag 40–50%, Pb 40–50%), doré alloy (Ag ≥85%, Au 3–5%, Pb 10–15%)

√Flexible downstream integration: compatible with silver electrolysis and cupellation routes

√Full-chain precious metal recovery: yields 99.9995% refined silver and crude gold from anode slime

√Customizable batch capacity – ideal for lead-zinc smelters, copper anode-slime plants, and e-waste recyclers

This lead-silver vacuum distillation furnace is a specialized vacuum metallurgical system designed to enrich silver and precious metals from lead-bearing feedstocks. Under vacuum and high temperature, lead is selectively volatilized while silver, gold, and other PMs concentrate in the residual molten phase – delivering high-grade intermediate products for downstream refining.

Process Note: Under vacuum high-temperature conditions (850℃ – 2600℃), lead selectively volatilizes, while silver, gold, and precious metals remain enriched in the molten residue. The entire reaction takes place inside the vacuum-sealed hearth, achieving zero off-gas emission and zero metal loss – fully compliant with the most stringent environmental standards for modern smelters.

• Peak power draw: 200 kW
• Normal operating power: 70 – 120 k

Vacuum distillation outputs can feed into two well-established refining routes:

Route 1: Silver Electrolysis

Feed requirement: crude silver ≥ 99% Ag

① Silver electrolysis → produces refined silver ≥ 99.9995%

② Silver anode slime treatment → recovers crude gold

Route 2: Silver Cupellation

Applicable when impurities ≥ 1.5% or Ag ≤ 95%

① Cupellation → removes Pb, Cu, Zn, Ni and other base metals

② Silver electrolysis → yields refined silver ≥ 99.9995%

③ Anode slime processing → produces crude gold

This furnace serves as a front-end enrichment unit for existing smelting lines. It is widely deployed in copper anode-slime treatment, lead-zinc smelter by-product recovery, and e-waste precious-metal recycling projects. We offer project-oriented customization based on your feed composition and capacity requirements.

Contact us for technical data sheets, process flow diagrams, and tailored proposals.