Calcium silicon manganese iron alloy is an ideal composite deoxidizer and desulfurizer. It can be used in converter steel-making workshop to remove oxygen, hydrogen and nitrogen in the molten steel, and it also can play an important role as inoculant in nodular cast iron production.
Cored wire is made by rolling and stuffing steel strip with alloy powders through professional cored wire machine. It can be inserted into molten steel quickly and smoothly. It can improve element yield, reduce steel making costs and provide significant economic benefits.
Deoxidation and control of inclusionary state are fundamental steel making operations. They allow fine-tuning of the composition of the molten metal, improving its yield of precious metal elements and rare earth components, reducing the amount of these elements added to the metallurgical process and significantly lowering the refining costs.
The use of calcium silicon manganese iron in the form of a core wire allows deoxidation and desulfurization to be carried out before the steel melt is cast. This removes gases and nonmetallic inclusions and prevents them from re-oxidizing after casting.
During the penetration of cored wire into a liquid metal bath, violent turbulence can occur. This is caused by the abrupt volatilization of the calcium contained in the cored wire, which can result in pollution of the bath (oxidation and re-nitriding), splashing of liquid steel and emanation of smoke.
However, the invention provides a solution to this problem by virtue of the fact that the calcium contained in the cored wire can be protected from these conditions by means of an insulator. The application of paper enclosing the steel liner of the cored wire acts as a thermal insulator, causing a delay in the increase in temperature of the metal bath, compared to the case where no protective paper is used. This is illustrated in FIG. 8, in which curve 8 b corresponds to cored wire with a steel liner covered by several layers of aluminized paper, and curve 8 a corresponds to the conventional cored wire.
The steel smelting and refining process will generate a large number of metal oxides. If these oxides are not removed, they will have a fatal impact on the intrinsic quality of the steel. The calcium injected into the steel by cored wires uses its strong reducibility to reduce the role of these oxides in the molten steel. It can make the oxides form calcium oxide or with other oxides to form a low melting point compound that can easily float in the steel, thereby reducing the content of these oxides in molten steel, purifying the molten steel and improving its purity.
Cored wire is a metal additive used in the metallurgical industry to be fed into molten iron or steel through specialized cored wire feeding equipment during the steelmaking process. It can purify molten steel and partly change the nature and shape of inclusions to improve the quality of the molten steel, casting state, improve the use of steel performance and alloy yield, reduce alloy consumption and steelmaking costs, shorten smelting time and accurately control the content of ingredients.
The main raw material for making this product is calcium silica powder and the outer skin is made of strip steel. With the help of specialized equipment, it can be inserted smoothly into molten steel and melt in the proper position to ensure that the powder will fully dissolve in the slag and produce chemical reaction. This avoids reaction with air and slag, increases absorptivity of metallurgy additives and effectively increase the element yield.
As a professional alloy cored wire manufacturer, ZX has been producing various kinds of alloy cored wires for many years. Our alloy cored wire products are widely used in steelmaking enterprises. They can meet the special technical requirements of the customers. The main products include pure calcium cored wire, iron calcium cored wire and iron-sulfur cored wire. These alloy cored wires are made from steel strips which are stuffed with some kinds of alloy powders. The iron in the core layer can increase the specific gravity and melting temperature of the calcium particles, thus reducing their rate of evaporation.
The calcium in the silicon calcium alloy has a strong affinity for oxygen, sulfur, hydrogen and nitrogen. It also has an effective warming effect on the steel melt and helps to float nonmetallic inclusions. This is an essential function in secondary steel refining technology outside the furnace.
The addition of silicon calcium can eliminate the tumor in ladle water outlet of steel making with aluminum as final deoxidizer, and it can prevent the clogging of the intermediate tank water outlet of continuous casting. It can also improve the quality of steelmaking and casting products. The addition of silicon calcium can also reduce the content of sulfur in the melt, control sulfide form in steel and improve the plasticity and impact toughness of steel.
Calcium silicon manganese iron alloy is widely used as a composite deoxidizer and desulfurizer in the steel industry. It can remove the oxides and sulfides in basic oxygen furnace steelmaking, increase the silicon content in electric arc furnace steelmaking and accelerate the deoxidation reaction of steel in molten salt bath. It can also improve the fluidity, machinability and ductility of steel. In addition, it can prevent the formation of high melting point calcium aluminates and sulfide precipitates in liquid steel during hot working.
It is very easy to use, which makes it the ideal deoxidizer for steelmaking. It is mainly used for re steelmaking and casting, and can also be used as a warming agent in converter steel refining workshops, and as inoculant and additives in the production of nodular cast iron.
The core wire is vertically inserted into the molten iron and steel through professional wire feeders to form a metallurgical bond with the molten metal. The solid calcium sheath makes the alloy powders put into the molten steel more effectively, so they can be easily dissolved and react with the steel in proper position, which avoids the reaction of added elements with air and slag, increases their absorption rate and greatly improves the quality of steel. It is a very efficient and economic method for the deoxidation, purification and denaturing of steel inclusions.
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