Aluminium chromium composite deoxidized alloy block deoxidized contained chromium aluminium and its producing technology

Abstract

A composite deoxidizing Al-Cr alloy block for the deoxidized Al-Cr contained steel is prepared from Al and ferrochromium through smelting Al, pouring the molten Al in a mould while proportionally adding the preheated ferrochromium blocks, and solidifying. Its advantages are high utilization of Al, high deoxidizing effect and high quality of steel.

Description

1. Technical field [0001] The invention relates to a deoxidized alloyed block used in the field of metallurgy, in particular to an aluminum-chromium composite deoxidized alloyed block for chromium-containing aluminum deoxidized steel. The invention also relates to the production process of the aluminum-chromium composite deoxidation alloyed block for chromium-containing aluminum deoxidized steel. 2. Technical background [0002] Iron and steel enterprises must use deoxidizers to deoxidize molten steel during the smelting process. Usually, single aluminum, silicon, and manganese are used as deoxidizers to deoxidize molten steel. The smelted steel has many non-metallic impurities and poor steel quality. , although most of the smelting industry has used composite deoxidizers, such as the existing pure aluminum-iron composite deoxidizers, aluminum-manganese-ferro composite deoxidizers, silicon-calcium-magnesium composite deoxidizers, silicon-barium-aluminum-calcium-iron composit...

AI Technical Summary

Problems solved by technology

[0002] Iron and steel enterprises must use deoxidizers to deoxidize molten steel during the smelting process. Usually, single aluminum, silicon, and manganese are used as deoxidizers to deoxidize molten steel. The smelted steel has many non-metallic impurities and poor steel quality. , although most of the smelting industry has used composite deoxidizers, such as pure aluminum-iron composite deoxidizers, aluminum-manganese-ferro composite deoxidizers, silicon-calcium-magnesium composite deoxidizers, silicon-barium-aluminum-calcium-iron composite deoxidizers, etc. These composite deoxidizers either have high production costs, complex processes, or are not suitable for use in the production of special steels, such as the "pure aluminum-iron composite deoxidizer" disclosed in Chinese patent CN02115909.2, which has the disadvantage of adding low carbon steel The block will not be conducive to improving the quality of molten steel; the increase in aluminum recovery rate is only a superficial phenomenon, and the aluminum entering the molten steel will also reduce the oxides in the slag, prolonging the deoxidation time, which is not conducive to improving the quality of molten steel