The role of silicon barium calcium in steelmaking
In steel smelting will use a variety of deoxidizer, and different deoxidizer deoxidizer effect is different, the common deoxidizer has ferric silicon, silicon barium calcium, silicon aluminum barium calcium, etc., silicon barium calcium as a multivariate deoxidizer, with its good deoxidizer effect, more popular with manufacturers. Silica barium calcium in deoxygenation is not only by silicon this element to deoxygenate, barium, calcium also has good oxyphilic, so what is the principle of silica barium calcium deoxygenation?
Silicon barium calcium is a compound deoxidizer, which not only has good deoxidizing effect in steel smelting, but also plays a certain role in purifying molten steel. Both the silicon and the barium in the silicon barium calcium can react with oxygen to form oxide impurities, which float on the surface of the molten steel and are easy to remove.
Barium in steelmaking temperature range to effectively reduce the vapor pressure of calcium, calcium increase solubility in the liquid steel, compared with the calcium silicon alloy, silicon barium calcium alloy as a source of calcium in liquid steel, the adding amount of calcium even halfway through the calcium silicon alloy addition amount, the calcium content in the molten steel is about twice the calcium silicon alloy, calcium in liquid steel is significantly improved. The results show that barium can effectively protect calcium and reduce the oxidation of calcium in molten steel, thus achieving the purpose of treating calcium in molten steel.
The deoxidizer of silicon barium calcium alloy is a new type of composite alloy of barium series. It is a deoxidizer and desulfurizer in steelmaking, and also has the function of dephosphorization. It is a inoculant and modifier in casting.
The use of compound deoxidizer or unit deoxidizer should be decided according to the actual situation. When used as deoxidizer, in addition to deoxidization, there is an advantage that barium and calcium can react with sulfur and phosphorus impurities in molten steel, which is easy to remove these harmful substances. For the quality of steel, it is also a kind of improvement. In the choice of silicon, barium and calcium can not be careless, only the quality of reliable products, contained impurities will be low, more conducive to improve the quality of steel.
