Aluminum Wires

Aluminum - Deoxidizer:

No ImageAluminum is one of the very strong and commonly used deoxidizer in steel making. It also finds use as a deoxidizer, grain refiner, nitride former and alloying agent in steels. Its ability to scavenge nitrogen and promote the formation of "pancake" ferrite grains led to its widespread use in drawing quality steels, especially for automotive applications. Also aluminum improves strength in low-carbon steels by fixing the interstitial nitrogen.

The consumption of aluminum in Al killed steel ranges normally between 1.5 -2.5 Kg/tonne of steel and the Steelmakers remain concerned with the efficiency of aluminum additions for both cost and quality reasons. Dissolved Oxygen Content of fully Al killed steels is normally below 5 ppm.

ADDITION PRACTICE:

Aluminum may be added to the furnace, ladle, Ladle Furnace, caster tundish or ingot mold. Each type of addition has its specific purpose, and each will produce characteristic results. Aluminum is a very powerful deoxidizer but poses problem because of its low density and lower melting point. It has been estimated that the density of liquid aluminum at steelmaking temperatures (1600°C) is only about 2 g/cm3. Steel's density at this temperature is greater than 7 g/cm3, depending on composition. Therefore, when aluminum is added to the bath, it will float at the steel/slag interface, where it quickly oxidizes. Relatively small amounts actually make contact with the steel. The recovery of Al by notch bar/ shot addition is therefore low and erratic as its loss by burning in atmosphere is high and unpredictable.

Wire feeding has overcome this disadvantage by force feeding the aluminum deep into the bath. The aluminum wire is introduced in to ladle from top through slag at a speed ranging from 100-300 meters/minute depending upon the ladle size. The main objective of wire feeding is to increase the residence time of solid aluminum before melting and release of aluminum at a depth of 0.5-1.5 meters from top so that aluminum reacts with steel before floating to the top The depth of Al wire melting is dependent on Al wire diameter, wire feeding speed, bath temperature etc. The amount added depends on composition, temperature, and tap carbon. The recovery of Aluminum is more than double of recovery achieved with Notch Bars/Shot additions. The normal Al level in Al/Al-Si killed steel is 0.02-0.05%.The deoxidation of slag by reducing its FeO and MnO content is also necessary for preventing Al fading (Loss of Aluminum) between Ladle furnace and caster. Aluminum contents over 0.01% can cause nozzle blockage in open stream continuous billet casting machines.
The solution lies in use of Sub merged entry nozzle and proper calcium treatment of steel.

Aluminum Wire Rod Specification:

Chemical composition of Aluminum Wire (%)
Grade Al (Min) Fe (Max) Si (Max) Mn
(Max)
Ca
(Max)
Mg
(Max)
Others
(Max)
Al 97 97 3.0 0.28 0.035 0.010 0.010 --
Al 98 98 1.0 0.3 0.1 -- -- 0.6
Al 99 99 0.5 0.2 0.2 -- -- 0.1
Wire Rod Specification
Grade Density
(gm/cc)
Melting Point
(°C)
Boiling Point ( °C) Chill Factor ( °C)
Al 98-99 2.6 – 2.7 660 - 670 2520 4.7 ± 1
*Chill factor are temperature changes in °C of steel bath at 1600°C after 1 wt% of addition of ferro alloys
& metals at room temperature
Wire Rod Specification (Flipping – Horizontal & Vertic al)
Details 9 mm 0

13 mm 0

  F1-10 F1-20 F1-10 F1-20
Weight (MT) 1.1 2.0 1.2 2.0
Length (Mtrs) 5500 10000 3947 6578
Width (Mtrs) 1052 1052 1052 1052
Internal Diameter (mm ) 510 510 510 510
External Diameter (mm ) 920 1100 1100 1280
Height from floor level (mm) 1100 1300 1300 1420

Aluminum Cored Wire Specification:

Chemical composition of Aluminum Cored Wire (%)
Grade Al
(Min)
Si (Max) Mn
(Max)
Ca
(Max)
Mg
(Max)
Cu
(Max)
Zn
(Max)
Fe
Al 97 97 0.28 0.035 0.015 0.010 0.5 0.5 Bal

 

Powder specification
Grade Density
(gm/cc)
Melting
Point
(°C)
Boiling
Point
(°C)
Size (mm)
Al 97 2.7 660 2520 0.85 – 1.06
Strip Specification
Grade Diameter
(0, mm)
Thickness (mm)
EDD IS 513 13±0.2 0.40 ± 0.03
Wire Characteristics
Grade Diameter ( 0, mm) Shape Powder Fill (gm/mt)
Al 97 13 ± 0.2 Round 200 ± 10
Coil Specification (Flipping Coil – Horizontal & Vertical)
Details

13 mm 0

F1-10

Coil Identification
Powder Weight
(MT)
1.00

All coils are color coded and fixed with a detailed sticker clearly displaying details such as coil no., powder content, strip weight, gross weight density & length. A fluorescent sticker displays the name of the product in bold letters on the outer diameter of the coil.

Handling

No metal sling, chain or rod is to be used across the ID of the coil for handling as it may damage the coil. Use only polyester, synthetic slings, fork lift/tractor to handle the coil. The pallet is an integral part of the coil and it is to be removed till the coil is consumed.

Shelf Life

Follow the shelf life period specified by MINEX








Strip Weight
(MT)
0.750
Net Weight
(MT)
1.750
Length (Mtrs) 5,000
Internal
Diameter (mm)
650
External
Diameter (mm)
1240
Height (mm) 630
Packing Storage & Safety

Packed in flipping cage and mounted on wooden / mild steel pallet and Strapped with pallet horizontally or vertically. All coils are wrapped in stretch film & palletized.

To be stored in dry & covered area away from heat and moisture. Material Safety data sheet can be Supplied on demand.