Overview

Separates zinc from copper-zinc brass scrap under vacuum. Copper stays in the crucible and is tapped clean; zinc is distilled off and recovered as metal, not as oxide dust.

Applications

Brass scrap & turnings
Copper-zinc dross
Galvanizing residues
Precious-metal bearing copper

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Key points

Why it earns its place on your floor

Zinc leaves as metal, not as dust

Zinc is drawn off as vapour and condensed back into saleable metal, so you are not losing it into the baghouse.

Clean copper, tapped straight out

With the zinc removed, the copper stays inside the crucible and is tapped at a grade you can sell without discount.

One run instead of two

Vacuum separation replaces the separate melting and dressing steps, cutting both energy and labour per tonne.

Specification

Technical data

Values marked as approximate are typical for a standard build; final ratings are confirmed in the technical agreement for your order.

Need a different capacity, frequency or configuration? We build non-standard units.

Technical specification
Processing principle	Vacuum distillation — zinc evaporates and is condensed back into metal
Feed materials	Brass scrap, copper-zinc mixed material, zinc-bearing residues
Metal recovery	Copper retained in the crucible; zinc recovered; gold and silver recovered with the copper
Model	SMJD-3000T / SMJD-6000T
Typical capacity	SMJD-3000T: 2+ tonnes per batch; SMJD-6000T: 4+ tonnes per batch
Cycle time	Aluminium-zinc: approx. 3 hours per batch. Copper-zinc: approx. 3 batches per 24 hours (varies with material, typically ±1 hour)
Output	Throughput depends on the feed material and the charge weight — the final rating is agreed in the technical specification
Energy consumption	Approx. 700–900 kWh per tonne
Installed power	300–500 kW, built to order
Power supply	IGBT digital induction power supply; approx. 15% less energy than the previous control cabinet
Transformer	500 kVA
Working temperature	Approx. 1100 °C measured at the thermocouple
Furnace chamber temperature	Up to 1400 °C in the furnace chamber (thermocouple reads approx. 1100 °C)
Pump-down time	Approx. 5 hours to reach working vacuum
Vacuum level	10–65 Pa (manufacturer catalogue figure; measurement point and method to be confirmed in the technical specification)
Furnace type	Vertical or hydraulic tilting design, built to order
Crucible	Graphite-silicon carbide; 30–80 heats (depends on ramming practice); replacement approx. CNY 20,000 / approx. 2 days
Cooling	Open-circuit cooling tower: approx. 150 T for SMJD-3000T, approx. 180 T for SMJD-6000T
Separation result	Copper product: approx. 1% residual zinc. Zinc product: ≤1% residual copper
Gold & silver	Gold and silver report to the copper; overseas feed typically approx. 3 g Au and 500 g Ag per tonne
Export destinations	Korea, Thailand, Malaysia, Laos, Vietnam, Russia, Kazakhstan and more
Lead time	35 working days (custom built)
Minimum order	1 set
Trial run	RMB 8,000 per run (chargeable)
Commissioning	Site supervision by our engineers on request — chargeable service