products details

Home > Products >

In-line Degassing Unit for Aluminum Melting: Minimize Casting Blowhole Defects for Continuous Aluminum Billet Casting Line Retrofit Projects

All Category

Continuous Casting Machine Parts

Ms. Huang

carly.huang@foxmail.com

86 15813688760

86 15813688760

Contact Now

In-line Degassing Unit for Aluminum Melting: Minimize Casting Blowhole Defects for Continuous Aluminum Billet Casting Line Retrofit Projects

Brand Name:	Boqiang
MOQ:	1 set
Price:	USD 1,000
Packaging Details:	Standard export packaging (carbon box, pallet, film)

Detail Information

Product Description

Detail Information

Place of Origin:

China

Molten Aluminum Operating Temperature:

680‑770 ℃

Degassing Efficiency:

≥56%

Rotor Setup:

2 Composite Graphite Rotors, 0‑600rpm Variable‑frequency Speed Control

Molten Aluminum Throughput:

25‑35 T/h

Outlet Hydrogen (Inlet＜0.28mL/100g):

≤0.12 ML/100g

Inert Gas Requirement:

Purity≥99.996%, Dew Point＜‑69℃

Temperature Control Accuracy:

±2 ℃

Outlet Hydrogen (Inlet＞0.28mL/100g):

≤0.14 ML/100g

Supply Ability:

600 pieces/ year

Highlight:

in-line degassing unit for aluminum melting

continuous casting machine degassing parts

blowhole defect reduction casting retrofit

Product Description

A compact, retrofittable in-line degassing solution engineered for continuous aluminum billet casting lines — suppressing blowhole defects and improving melt quality within limited installation space.

Blowhole Control Challenges in Aluminum Billet Line Retrofit

When aluminum mills upgrade older production lines, the original launder systems typically lack in-line melt purification units. After refining in holding furnaces, molten aluminum continuously reabsorbs hydrogen while flowing through open launders. Dissolved hydrogen precipitates during solidification and forms internal blowholes, resulting in failed NDT inspection of aluminum billets.

Retrofit projects normally face space and budget constraints. Full replacement of the entire casting system is impractical, calling for compact, retrofittable degassing equipment that can be installed without prolonged production shutdown.

Refining Principle of the In-line Degassing Unit

Twin-Rotor Micro-Bubble Refining System

The unit is retrofitted to the launder section between the holding furnace and the mold. Twin rotors shear inert gas into abundant micro bubbles that are evenly distributed throughout the molten aluminum. Hydrogen atoms diffuse into the bubbles and escape via flotation, while suspended oxide inclusions are captured by the bubbles — achieving simultaneous degassing and slag removal.

The modular design supports retrofitting of old lines with phased installation and commissioning.

Key Technical Specifications

Item	Specification	Source
Molten aluminum throughput	500–6000 kg/h	Product PDF P3
Rotor material	High-purity graphite with anti-oxidation coating	Product PDF P5
Operating temperature	680–760 ℃	Product PDF P4
Purge gas	Argon / Nitrogen	Product PDF P6
Hydrogen removal performance	Final hydrogen content down to 0.12 ml/100g Al	Product PDF P7

Project Suitability & Maintenance Notes

The unit is suited to retrofit projects for existing continuous aluminum round billet and slab billet casting lines, as well as new medium and small melting-casting lines.

The insulated refractory cabinet reduces melt temperature loss.
Modular construction shortens on-site installation time.
Graphite rotors are consumables; maintenance teams can define replacement intervals based on production shifts and impurity levels of the molten aluminum.
The gas supply control system adjusts gas parameters according to melt flow rate to maintain consistent purification performance.

Summary

This in-line degassing unit delivers a lightweight melt purification solution for aluminum billet casting line retrofits. It treats molten aluminum inside launders to suppress blowhole formation and improve billet melt quality within limited installation space.

Tags:

Aluminum Melting Furnace

Homogenizing Furnace

Billet Casting Machine

Billet Cutting Machine

Regenerative Burner System

Continuous Casting Machine Parts

Aluminum Melting Furnace

Homogenizing Furnace

Billet Casting Machine

Billet Cutting Machine

Regenerative Burner System

Continuous Casting Machine Parts

products details

Aluminum Melting Furnace

Homogenizing Furnace

Billet Casting Machine

Billet Cutting Machine

Regenerative Burner System

Continuous Casting Machine Parts

In-line Degassing Unit for Aluminum Melting: Minimize Casting Blowhole Defects for Continuous Aluminum Billet Casting Line Retrofit Projects

in-line degassing unit for aluminum melting

continuous casting machine degassing parts

blowhole defect reduction casting retrofit

Slip Casting Mold

Wire Feeder

Cooling Crystallizer