AdTech Metallurgical Materials: foam filters, degassing units and launders for aluminum

Ceramic foam filters, filter boxes, degassing units, launders, hot-top tooling, tip nozzles and fluxes from AdTech for aluminum lines. Size selection and a quotation for your project.

Ceramic foam filters (CFF)

AdTech alumina foam filters are made by coating a foam carrier with thixotropic alumina slurry and firing it at 1180 °C. The filter sits in the filter bowl on a sealing gasket that keeps molten aluminum from bypassing the joint. Standard sizes run from 7x7 to 26x26 in.

Fired at 1180 °C
Sizes 7 to 26 in
Thickness 50 ± 2 mm
Three gasket materials

Degassing units and rotors

The unit sits between the furnace and the pouring line. Its rotor injects inert gas or a chlorine mix and breaks it into fine bubbles that carry hydrogen and slag out of the melt. Versions handle 15, 35 and 65 t/h with one, two or three rotors; the silicon nitride rotor lasts 2–5 years.

15, 35 and 65 t/h
One to three rotors
Rotor life 2–5 years
Lining life 2–3 years

Launders for melt transfer

The launder links the furnace, degassing unit, filter box and pouring station, carrying the melt while holding its temperature. Its fused high-silica lining resists wetting by aluminum, and the metal temperature drops by no more than 2 °C per meter. The operating limit is 1340 °C.

Lining length 500–2000 mm
Drop within 2 °C per meter
Operating up to 1340 °C
Lining made separately to drawing

Flow control parts

Tap out cones are vacuum formed from aluminum silicate fiber; they resist wetting by aluminum and seal the furnace or filter bowl outlet. Flow control bars of 100–1200 mm and flow tubes of 100–650 mm are made of fired silica and work as a pair on ingot lines, lasting 50–100 runs with a BN coating.

Cones 20–350 mm long
Cones rated to 1100 °C
Control bars 100–1200 mm
50–100 runs with BN coating

Hot-top mold tooling

For hot-top billet production AdTech makes graphite rings, sprue bushes, transition and distribution plates. Rings are machined on CNC equipment from high purity graphite and last 800–1200 runs, while sprue bushes last 450–800 runs. Sizes run from 3 to 20 in billet diameter.

Graphite rings 800–1200 runs
Sprue bushes 450–800 runs
Billets 3 to 20 in
Table preheat 260–350 °C

Tip nozzles for twin-roll lines

The tip nozzles are made of a nano-grade fiber composite and set the strip size on twin-roll lines for foil stock and PS plate. The set includes spacers, ears and a flow control box. Lengths run 200–2300 mm, widths 50–600 mm, and the working limit is 1260 °C.

Length 200–2300 mm
Tip thickness 1.6–10 mm
Density 0.45–0.57 g/cm³
Working up to 1260 °C

Refining and covering fluxes

AdTech refining flux is a white to slightly grey powder based on chlorides and fluorides, carried to the bottom of the melt by nitrogen or argon. The dosage is 1.5–2.0 kg per ton with 0.8–1% ash output. The series also covers deslagging, covering and oxide removal fluxes.

Dosage 1.5–2.0 kg per ton
Ash output 0.8–1%
Nitrogen or argon carrier
Refining at 700–740 °C

How to choose an AdTech part for an aluminum line

Selection starts with the section of the aluminum line.

For melt treatment AdTech offers degassing units and plate-type filter boxes with ceramic foam filters, for metal transfer launders, for flow control tap out cones, control bars and flow tubes, for billet production hot-top tooling, for twin-roll strip lines tip nozzles, and for melt treatment fluxes.

Size is chosen by line throughput, filter size, billet diameter or strip width.

Foam filters and filter boxes

Alumina foam filters are fired at 1180 °C; standard sizes run from 7x7 to 26x26 in, thickness 50 ± 2 mm. The filter sits in the bowl on a sealing gasket made of fiber paper, fiber cotton or expanding material.

The plate-type box takes 15 to 26 in filters with single or two-stage filtration. Its silicon carbide heater is rated for 1450 °C and 2200 hours of continuous service, and the cover lifts hydraulically, mechanically or flips open.

Degassing units

The unit sits between the furnace and the pouring line and removes hydrogen and slag from the melt by gas flotation. Versions handle 15, 35 and 65 t/h with one, two or three rotors.

The rotor and heater thimble are made of silicon nitride: the rotor lasts 2–5 years, the thimble 1–2 years. The fused high-silica lining lasts 2–3 years on average, and the unit without wearing parts at least 5 years.

Launders

The launder links the furnace, degassing unit, filter box and pouring station, carrying the melt and holding its temperature. The metal temperature drops by no more than 2 °C per meter.

Lining and launder lengths are 500–2000 mm, and the operating limit is 1340 °C. The lining can be made separately to the customer drawing.

Flow control

Tap out cones 20–350 mm long are vacuum formed from aluminum silicate fiber and rated to 1100 °C. They seal the furnace or filter bowl outlet.

Flow control bars of 100–1200 mm and flow tubes of 100–650 mm are made of fired silica and work as a pair on ingot lines; with a BN coating they last 50–100 runs.

Hot-top tooling

Graphite rings, sprue bushes, transition and distribution plates and distribution launders cover billet diameters from 3 to 20 in. High purity graphite rings last 800–1200 runs, sprue bushes 450–800 runs.

After installation the table is preheated to 260–350 °C.

Tip nozzles and fluxes

Nano-grade fiber composite tip nozzles for twin-roll strip lines come in lengths of 200–2300 mm, widths of 50–600 mm and tip thickness of 1.6–10 mm, with a working limit of 1260 °C. The set includes spacers, ears and a flow control box.

Refining flux is carried into the melt by nitrogen or argon, with a dosage of 1.5–2.0 kg per ton and 0.8–1% ash output.

The manufacturer AdTech Metallurgical Materials

AdTech Metallurgical Materials Co., Ltd. was founded in 2012, and its plant in Wen County, Henan Province, started production at the end of 2013. It is a Sino-foreign joint venture with an office in Zhengzhou.

Dimensions, material and lead time are stated in the quotation for each project.

AdTech Metallurgical Materials and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of AdTech Metallurgical Materials and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.