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Phone: +86 132 6040 2428
Mong Kok, Kowloon, Hong Kong

06 / 09 · Own production

Slide gates, nozzles & mould tubes

Flow-control refractories and casting consumables for steel ladles, tundishes and billet casters: slide gate plates and assembly mortar, inner, collector and metering nozzles, well and seating blocks, ladle filler sand, EBT taphole sleeves for electric arc furnaces and copper mould tubes.

Elongated precast tundish flow-control block with a recessed pocket and lifting loops
06.01

Slide gate plates

Upper and lower slide gate plates for steel ladles and tundishes, supplied as sets for the customer's gate mechanism: unburned alumina–carbon plates for small and medium ladles, burned alumina–zirconia–carbon plates for large ladles and long sequences.

Slide gate plates
PropertyAl₂O₃–CUnburned, small and medium ladlesAl₂O₃–ZrO₂–CBurned, large ladles
Al₂O₃ (%)≥90≥85
C (%)≥3≥3
ZrO₂ (%)—≥5
Apparent porosity (%)≤9≤7
Bulk density (g/cm³)≥3.0≥3.1
Cold crushing strength (MPa)≥120≥120

Typical values from the product data sheets. Properties for a specific order are confirmed in the quotation.

06.02

Ladle inner and collector nozzles

Inner (well) nozzles and collector nozzles for ladle slide gate systems, made to the customer's drawing and matched to the plates.

Ladle nozzles
PropertyInner (well) nozzleCollector nozzle
Al₂O₃ (%)≥85≥80
C (%)2–5≥5
Apparent porosity (%)≤12≤10
Bulk density (g/cm³)≥2.9≥2.85
Cold crushing strength (MPa)≥80≥60

Typical values from the product data sheets. Properties for a specific order are confirmed in the quotation.

06.03

Tundish metering nozzles

Zirconia metering nozzles and composite nozzles with a zirconia insert for open-stream billet casting. The stable bore keeps the casting speed constant through the sequence.

Tundish metering nozzles
PropertyZrO₂ 94Zirconia insert
ZrO₂ (%)≥94
Apparent porosity (%)≤10
Bulk density (g/cm³)≥4.8
DimensionsMade to customer requirements

Typical values from the product data sheets. Properties for a specific order are confirmed in the quotation.

06.04

Well blocks and porous plug seating blocks

Precast corundum–spinel well blocks for the ladle slide gate and seating blocks for porous plugs, fired and supplied ready to install.

Well blocks and seating blocks
PropertySlide gate well blockPorous plug seating block
Al₂O₃ (%)≥90≥90
MgO (%)4–84–8
Bulk density (g/cm³)110°C × 24h≥3.0≥3.0
Cold crushing strength (MPa)1500°C × 3h≥80≥80
Permanent linear change (%)1500°C × 3h0…+0.80…+0.8

Typical values from the product data sheets. Properties for a specific order are confirmed in the quotation.

06.05

Slide gate assembly mortar

Alumina–chrome mortar for setting nozzles and plates in the slide gate assembly. Supplied ready-mixed; forms a dense joint that resists steel and slag penetration.

Slide gate assembly mortar
PropertyAl₂O₃–Cr₂O₃Alumina–chrome mortar
Al₂O₃ + Cr₂O₃ (%)≥90
Cr₂O₃ (%)≥3
Grain size≤0.5 mm
Max. service temperature (°C)1700
PackingReady-mixed, in sealed buckets

Typical values from the product data sheets. Properties for a specific order are confirmed in the quotation.

06.06

EBT taphole sleeves and blocks

Magnesia–carbon taphole sleeves, end sleeves and taphole blocks for eccentric bottom tapping (EBT) electric arc furnaces, supplied as sets for the customer's taphole design.

EBT taphole refractories
PropertyTaphole sleeveEnd sleeveTaphole block
MgO (%)≥76≥76≥80
C (%)≥14≥14≥10
Apparent porosity (%)≤4≤4≤5
Bulk density (g/cm³)≥2.95≥2.95≥2.90
Cold crushing strength (MPa)≥35≥35≥35

Typical values from the product data sheets. Properties for a specific order are confirmed in the quotation.

06.07

Copper mould tubes

Copper mould tubes for billet continuous-casting machines, with a hard-chrome plated bore. Section, length, radius and taper are made to the customer's drawing.

Copper mould tubes
Property130 × 130Billet mould tube
Tube materialCu-Ag (0.08–0.12 % Ag) or Cu-DHP
Electrical conductivity (% IACS)≥85
Hard-chrome plating thickness (mm)0.08–0.12
Dimensions130 × 130 mm, L 801 mm, R 6000 mm

Other sections, lengths and radii made to the customer's drawing.

Typical values from the product data sheets. Properties for a specific order are confirmed in the quotation.

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