Before casting, the metal treatment process is critical in the steel industry. Metal treatment plays a crucial role in deoxidation as it is necessary for desulfurization, inclusion modifications and purification. The main method for introducing alloy additions into the liquid steel is through cored wires. The cored wire is an alloyed steel or iron type with an inner cavity which contains an additive (chromium) or other metal. Available in various grades, sizes, and types, cored steel wires have a wide range of uses.
In the past, calcium cored steel wires were used as a way to add more calcium to the slag. They can also be used to introduce a variety of other materials such as magnesium, copper or zinc into the steel melt. The steelmaker can perform metal treatment without closing the ladle or risking slag production in the smelter. The smelting process and the casting operation can be completed faster, reducing the cost of slag.
This wire core is protected by a sheath of steel, and its cavity filled with calcium powder. This is much smaller than the slag and therefore can penetrate into the steel ladle more easily. It reduces the depth of injection, makes it less likely that a slag will form and allows the calcium to absorb more quickly into the steel. It leads to a better calcium recovery as well as improved inclusion moderating.
For conventional calcium-cored wires to penetrate the steel melt or slag, high injection speeds are required. The result is a localized supersaturation of calcium, which can reduce the reaction rate. In contrast, Hi-Cal(r) can be injected at lower speeds and still achieve a satisfactory calcium treatment.
Hi-Cal® cored wires are available in a nominal 9.6 mm diameter and have an approximately 54 g/m2 powder filling rate. It can also be fed through existing machinery and is compatible for calcium iron wires. The product is simple to use and maintain. This reduces operating costs as well as investment expenses. It's a solution that is both safe and eco-friendly, which can be used for all types of steelmaking processes from blast furnaces up to open hearths. XLS Metals has developed this innovative new technology, which is now being applied worldwide. It's a good alternative to expensive lance-type systems which are more costly and take up much space. Hi-Cal(r) is a highly effective product with excellent metallurgical results. It was introduced with success into many plants in Europe as well as Asia. This innovative technology is being recognized by the steelmaking industry for its benefits, and positive impacts on their smelters. The technology is also an excellent option for any steelmaker who wants to boost productivity and reduce their energy usage.
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