Continuous casting machine for non-ferrous metals

01

Distinguish DC withdrawal from wheel casting

The direct-chill process described in US 4,157,728 forms an outer shell in a fixed water-cooled mould, then cools the emerging ingot below it while the ingot is withdrawn downward. Casting to a set length is interrupted so the ingot can be removed. Identify this semi-continuous arrangement separately from an uninterrupted bar-to-rolling line. [1]

US 4,444,244 describes a grooved wheel closed by an endless band as prior art, with the extracted bar feeding a rolling installation. Its discussion of band cooling, cracking and difficulties with higher-melting metals belongs to that prior-art arrangement. The patent’s own proposed invention replaces the band with movable cooled flaps; it should not be described as merely another band-wheel example or a prohibition on modern copper casting. [2]

The image shows a hot bar on a roller line. It does not establish the metal, a vertical DC pit or a wheel-and-band mechanism. Select the process from the machine drawings and alloy/product evidence, rather than from the illustration.

02

Keep start-up, steady operation and simulation results separate

The Novelis patent describes alloy-dependent starting speeds of 25–75 mm/min and steady-state speeds of 40–80 mm/min, with a separate acceleration stage. These are the patent’s contextual examples, not a combined machine speed range or a production guarantee. Its pulsed-coolant proposal concerns control of butt curl during start-up. [3]

Editorial calculation: assuming an illustrative 6 m length is withdrawn at a constant 40–80 mm/min throughout, 6,000 ÷ 80 to 6,000 ÷ 40 gives 75–150 minutes. This excludes start-up, acceleration, interruptions and removal. It is neither manufacturer-published cycle time nor measured production data. [3]

The patent’s flow wording is 0.1–0.5 gallons per minute per inch of “mold bore”, explicitly defined there as the mould periphery. It is not a per-diameter or per-area rate. Retain that definition and confirm the gallon convention and actual mould/cooling design before any unit conversion; no plant flow requirement is calculated here. [3]

The 2024 study models a quarter section of 750 × 150 mm for a 7050 aluminium flat ingot. Its casting-speed comparison holds pouring temperature at 720 °C, primary cooling intensity at 2,000 W·m⁻²·K⁻¹ and secondary flow at 270 L/min. Within that simulation group, raising speed from 24 to 96 mm/min deepens the sump from 276.28 to 655.67 mm. These are simulated outcomes, not validated machine settings. [4]

The same results section warns of serious liquid leakage above 70 mm/min in the studied configuration. Presenting only the deeper-sump or lower-stress results at higher speed would omit that important boundary. Ask the author and equipment designer about the applicable model and alloy/section before treating a simulation trend as an operating envelope. [4]

US 4,157,728 links instability of its described distributor arrangement to surface defects and inverse segregation. Its review of older DC equipment does not establish the scalping depth or defect performance of a currently supplied caster. Confirm the actual level-control and cooling design with the equipment supplier. [1]

03

Identify the supplied casting and downstream equipment

For vertical DC casting, identify the melt feed/distribution arrangement, mould, secondary cooling and withdrawal/bottom-block equipment. For a band-wheel line, identify the wheel, band, tensioning/cooling arrangement and interface to the bar-handling or rolling equipment. These are different architectures, not a list of units that every non-ferrous caster contains. [1] [2]

The patents describe equipment-specific concerns where cooling water and molten metal interact. Obtain the supplier’s engineered water paths, monitoring, interlocks and safe operating documentation for the actual plant. A historical patent description does not verify a new machine’s safety system. [2] [3]

04

Define alloy, section, production boundary and acceptance

State the alloy, cast product and section, selected casting principle, number of moulds or strands, required cast length or continuous bar duty, and the connected furnace/rolling or extrusion process. Request output and quality evidence for that configuration. [1] [2]

Separate the withdrawal-speed profile from total cycle time, mould cooling from secondary cooling, and simulated results from measured production. Require the proposed level control, water-system design, surface/segregation acceptance and commissioned operating envelope for the actual alloy and section. [3] [4]

05

Send the metal, product and plant data together

Paste it into your enquiry below or into an email to a maker, then replace every bracket.

Metal: [alloy range]
Product: [ingot; billet; slab; rod bar; section]
Principle: [vertical DC; hot top; wheel and band]
Output: [t/h; strands; cast length]
Downstream: [rolling; extrusion]
Melt supply: [furnace; trough; level control]
Water: [flow; quality; temperature; interlocks]
Quality: [surface; scalping; segregation]

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