Calcium-calcium aluminate core-spun yarn for steel smelting

Abstract

The invention relates to a cored wire which is used for external final melting of a liquid steel furnace and which contains calcium metal. The invention is characterized in that a certain amount of powder made by using calcium silicate is contained in a cored wire, wherein, calcium metaaluminate 12CaO7Al2O3 powder is optimal. The external final melting through the cored wire can obviously enhance the utilization rate of the calcium metal, reduce the temperature reduction of the liquid steel, and achieve satisfactory metallurgy effect.

Description

technical field

[0001] The invention belongs to the technical field of metallurgy and relates to a cored wire containing metallic calcium for external refining of molten steel. Background technique

[0002] In the iron and steel smelting process, the refining process outside the furnace has been widely used. The refining process outside the furnace can further desulfurize, deoxidize and denature the inclusions to produce higher-quality alloy steel to meet the needs of industrial and agricultural development and construction. In the post-processing process of refining outside the furnace, it can be divided into two categories according to different refining equipment, one is the ladle powder spraying method, and the other is the ladle wire feeding method. Among them, the desulfurization and deoxidation effect of the ladle spraying method is relatively good, but the spraying equipment used is relatively complicated, the investment is large, the operation is difficult, and the...