Calcium silicon, also called calcium silicide / CaSi, is an ideal compound deoxidizer and desulfurization agent. It is used in steel off-furnace refining process such as deoxidation at converter tapping, slag killing and foam slag removal in ladle furnace.
The present invention provides a method for determining calcium content of iron-calcium cored wire that is simple in operation, quick, accurate and stable.
Calcium silicon is a kind of ideal compound deoxidizing and desulfurization agent. It can reduce the content of oxygen and sulfur in liquid steel. It can also improve the fluidity of molten steel. The deoxidizing effect is mainly due to its ability to form stable oxide and sulfide layers on the surface of molten steel. It is a popular choice for deoxidizing and desulfurizing agents in the steel industry.
It is used in the primary steelmaking process as a deoxidizer in converter tapping, desulphurization of hot metal in ladle furnace, slag killing and foam slag reduction, and inclusion modification (shape and distribution control). It can also be fed into the iron ladle as wire refining agents with the wire feeding method for high-quality special steel, nickel-base alloy, titanium-based alloy production, warming agent in converter steelmaking workshops, and inoculant for ductile cast iron. It has a strong deoxidizing ability, the deoxidation products are easy to float and discharge, and it can greatly improve the performance of steel, especially its plasticity and impact toughness.
Ferro silicon is a special deoxidizing agent, which has high affinity with oxygen, and it is also used as alloying additive in steel making. The low carbon ferro silicon is the most popular choice among calcium silicate deoxidizers, due to its excellent performance and price advantages.
The core of the cored wire is made of pure calcium metal powder or calcium iron alloy powder, wrapped in a steel strip and stuffed through professional cored wire machine. The cored wire can reduce the burning loss of metal calcium in molten steel, make the contact between calcium and slag more intimate, prevent from nozzle blockage and improve the casting state.
The cored wire is mainly used in the steel melting process. It can purify the shape of the steel inclusions, partly change their nature and shape, and greatly improve the quality of molten steel, solve the problem of aluminum killed slag continuous casting, and prevent from nozzle clogging and casting defects.
Nitrided ferro chrome is an important iron niobium alloy which is used as deoxidizing agent in steel production. It works by reducing the oxygen content of molten steel and thus enhances the performance of HSLA steel. This product is prepared from ferrochrome and calcined magnese.
It has high affinity for oxygen and desulfurization, is easy to float out of molten steel, can change the shape of inclusions in molten steel, improve the castability of aluminum-killed molten steel continuous casting and solve the problem of nozzle blockage. It can also be used as an alloying element in steelmaking.
Cored wire is a type of composite material consisting of low carbon steel strip and various kinds of additives (deoxidizer,desulfurization agent, inoculant etc). It is used to inject into molten iron or steel liquid through a nozzle to achieve the function of Deoxidation,Desulphurization and Inclusion Modification. It has the advantages of high efficiency, less loss rate and precise composition control.
It is produced from a mixture of calcium oxide and silicon dioxide in an electric furnace with carbonaceous reducing agent. Ferro Silicon can be used as a deoxidizing and desulfurizing agent in the steel industry. It is available in lumpy form or in a cored wire. The latter is injected into the molten steel through the specialized equipment. This method can effectively reduce the temperature loss caused by agitation of the molten steel, prevents dust inhalation and reduces the consumption of refractory materials and carrier gas. It also can improve the shape of nonmetallic inclusions and ensure the quality of molten steel.
It is an ideal compound deoxidizer and desulfurization agent. Because silicon and calcium have strong affinity for oxygen, the alloy is able to deoxidize the metal oxide in the diffusion deoxidation process. It can also control the size and distribution of oxide and sulfide inclusions, improving the fluidity, machinability and impact toughness of the steel product.
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