Silicon-barium-strontium-iron alloy deoxidizer

Abstract

The invention relates to a silicon-barium-strontium-iron alloy deoxidizer. The silicon-barium-strontium-iron alloy deoxidizer comprises the following components in percentage by weight: 23 to 31 percent of silicon, 8 to 14 percent of barium, 11 to 18 percent of strontium and the balance of iron and is characterized by comprising 2 to 9 weight percent of cobalt oxide or titanium oxide, wherein the granularity of a silicon-barium-strontium-iron alloy and the cobalt oxide or the titanium oxide is between molecular level and 100nm. In the deoxidizer provided by the invention, the silicon-barium-strontium-iron alloy is mixed with the cobalt oxide or the titanium oxide, and the mixture is used as a molten steel deoxidizer. Compared with a single alloy deoxidizer, the silicon-barium-strontium-iron alloy deoxidizer has an obvious deoxidizing effect; particularly, an Al2O3 inclusion in a type of steel with low requirements on the content of aluminum and sulfur can be changed and reduced. The deoxidizer can make all alloy elements exert a coordinating function in the deoxidizing process, so that the inclusion can be formed quickly and float on the surface of molten metal; and the deoxidizer has extremely ideal effects of deoxidization, desulfurization and dephosphorization.

Description

technical field [0001] The invention relates to a silicon-barium-strontium-iron alloy deoxidizer, in particular to a composite deoxidizer of an aluminum-silicon-barium-strontium-iron alloy and cobalt oxide or titanium oxide, which is used for final deoxidation in steelmaking. Background technique [0002] In the prior art, aluminum is a strong deoxidizer. After adding aluminum to molten steel, the surface layer is melted and oxidized, resulting in a strong exothermic phenomenon, and the melted aluminum is immediately coated with a layer of aluminum oxide with a very high melting point. , due to the high viscosity of the mixture of metal oxides, it seriously hinders the continuous melting of aluminum, further increases the buoyancy of aluminum, affects its deoxidation ability, increases the consumption of aluminum, and increases the cost of steelmaking. In order to improve the economic benefits of steelmaking enterprises, people use composite deoxidizers to replace pure alumi...

AI Technical Summary

Problems solved by technology

Such as CN1024928C invention patent specification discloses a kind of Al-Mn-Fe composite deoxidizer, the addition of manganese in this deoxidizer strengthens the deoxidation ability of aluminum, but wherein the upper limit of manganese content is 35%, the lower limit is 30%, the utilization rate of aluminum is still not ideal