Non-ferrous smelting tapping is the operation of opening a furnace tap hole to release molten matte or metal in a copper, nickel or aluminium plant.
As electric vehicle production lifts demand for these metals, smelters run more campaigns per year. Every additional tap is an additional tap hole that has to be opened reliably and safely.
In non-ferrous smelting, opening a matte tap hole calls for an oxygen lance suited to the job. Read on to explore what a matte tap hole is, how an oxygen lance opens it, and what to consider when sizing a lance for the duty.
An electric vehicle carries substantially more copper than a comparable combustion vehicle, and its battery and structure draw on nickel and aluminium. Charging infrastructure adds further copper demand in cabling and distribution equipment.
EV battery metals demand therefore lands not on car plants, but on mines and smelters several steps upstream.
None of these arrive as finished metal. All of them pass through smelting and refining operations that have to run to schedule.
When a smelter is asked to increase output, the usual answer is more campaigns and shorter turnarounds rather than a new furnace.
That compresses the time available for every routine operation, including tapping. A tap hole that takes twenty minutes longer than planned is no longer a nuisance; it is a scheduling problem that propagates through the shift.
A tap hole is deliberately closed between taps. It is plugged with clay or refractory material that hardens in the heat.
When the furnace is ready to tap, that plug has to be removed - and by then it has hardened into exactly the material it was designed to become.
Mechanical drilling is common, but drills bind, break and struggle where the plug has partially fused with solidified metal. That is where a thermal method is used instead.
In copper smelting and nickel smelting, the furnace produces matte - a molten mixture of metal sulphides that separates from the slag and is drawn off for further processing.
The opening through which it is drawn is the matte tap hole. Opening a matte tap hole in copper and non-ferrous smelting furnaces is a listed application for Daiwa SC Lance.
Aluminium smelter operations work differently, producing molten aluminium by electrolysis rather than matte by smelting.
Daiwa SC Lance is a self-consuming oxygen lance. It has a hollow cross-section that carries oxygen to the working tip, and the pipe consumes itself as it burns, generating temperatures up to 3,000 °C.
No external fuel gas is supplied during operation - oxygen only.
That temperature is what allows the lance to burn through a hardened plug, through solidified matte and through accumulated deposits, rather than trying to cut them mechanically.
Daiwa SC Lance is supplied across a defined size range. Selection is driven by three things: the depth of the tap hole passage, the access available at the furnace, and the working distance the operator must maintain.
|
Parameter |
Published range |
|
Nominal size |
6A (1/8") to 20A (3/4") |
|
Outside diameter |
10.5-27.2 mm |
|
Wall thickness |
1.6-2.8 mm |
|
Length |
1,000-6,000 mm |
|
Working temperature at tip |
up to 3,000 °C |
|
Connection types |
Type-2, Type-2ST, Type-6, SE, PE, QC |
For confined access, a smaller-diameter option exists. Daiwa Mini Lance is cold-drawn at an outside diameter of 6–10 mm with customisable wall thickness, supplied either stiff or bendable depending on the work.
Other sizes can be produced on request.
Length is a safety parameter before it is a process parameter. The operator has to stand far enough from the tap hole to be clear of the stream once it runs.
Two decisions follow from that, and both belong in the risk assessment rather than in an afterthought:
The mechanics are similar; the surrounding conditions are not.
Sulphide-bearing materials introduce fume considerations that differ from a steel shop, and the physical layout of a smelter tapping bay often gives less room than an EAF tapping floor.
Ventilation planning and standoff distance therefore deserve specific attention in non-ferrous smelting tapping practice, rather than being carried over from steel practice.
Operator safety is the first specification. Five points apply whenever a lance enters service.
Personal protective equipment rated for radiant heat and molten splash is required, together with ventilation adequate for the fume generated by the material being cut.
Daiwa Lance products are manufactured in Tan Thuan Export Processing Zone, District 7, Ho Chi Minh City, Vietnam, using Japanese steel-tube manufacturing technology and engineering discipline, backed by JIS.
Raw material is quality carbon steel. Finished pipe is produced under ISO 9001 quality management with ISO 14001 environmental management.
The company exports to more than 52 countries with full export documentation. For smelters that import consumables against a campaign schedule, complete documentation is frequently the difference between arriving on time and arriving after the furnace needed it.
EV growth is felt at the smelter as schedule pressure long before it is felt as capital investment.
Non-ferrous smelting tapping is one of the routine operations that absorbs that pressure, and the reliability of the lance used to open the tap hole affects whether a campaign holds its schedule.
Three practical takeaways:
Looking for an oxygen lance for tap hole opening at a copper or nickel smelter? Daiwa Lance can help you confirm the right size, length and connection type for your tap hole depth, workspace constraints and operating conditions.
A matte tap hole is the opening through which molten matte - a mixture of metal sulphides produced in copper and nickel smelting - is drawn from the furnace. It is plugged between taps and must be reopened for each tap. Opening matte tap holes is a listed application for the Daiwa SC Lance.
A Daiwa SC Lance generates temperatures up to 3,000 °C at the working tip. It is self-consuming: the pipe burns itself using oxygen only, with no external fuel gas supplied during operation. That temperature is what allows it to burn through hardened tap hole plugs and solidified material.
Only with an oxyacetylene torch. Do not use ignition devices. Once ignition is established, the tip is red hot and remains an active heat source until the oxygen supply is closed and the lance is fully consumed or extinguished under controlled conditions.
The Daiwa SC Lance is supplied from 6A (1/8") to 20A (3/4"), with outside diameters of 10.5-27.2 mm, wall thickness 1.6-2.8 mm and lengths of 1,000-6,000 mm. For confined access, the Daiwa Mini Lance is cold-drawn at an outside diameter of 6-10 mm with customisable wall thickness, stiff or bendable. Other sizes can be produced on request.
No. A self-consuming oxygen lance cannot cut every material, and it cannot be used underwater. Its documented applications include: tap holes on electric furnaces (including EBT tapping), blast furnace iron and slag notches, matte tap holes in copper and non-ferrous smelting, deposit metal removal from converters and electric furnaces, ladle nozzle and tundish cleaning, removal of metal and slag stuck to mixer cars, slag removal from ingot walls, and cutting ferrous materials.
Established since 1997, Daiwa Lance has positioned ourselves as a pioneer in thermic cutting and oxygen lancing technology. Based in Ho Chi Minh City, Vietnam, we have been providing quality customer service and products with advanced Japanese technology.
We maintain the highest quality standards with ISO 9001:2015, ISO 14001:2015, and JIS G standards certifications. We have also expanded our reach globally, exporting to over 55 countries worldwide.
Visit us through our contact channels today: Email, WhatsApp, Contact Us form, or connect with us on Youtube, LinkedIn and Facebook.