Low-alkalinity low-carbon tundish covering agent for wear-resistant steel and application thereof

Abstract

The invention discloses a low-alkalinity low-carbon tundish covering agent for wear-resistant steel and an application thereof. The covering agent is prepared from the following components in percentage by mass: 15%-20% of CaO, 30%-40% of SiO2, 10%-20% of Al2O3, 1%-6% of MgO, 5%-10% of Na2O, 1%-10% of K2O, 1%-5% of B2O3, and 0.5%-2% of C; and the sum of the components is 100%. The covering agent has relatively low melting point and low viscosity, the spreadability is good in the casting process, air can be well isolated, and secondary oxidation is prevented. Meanwhile, the heat preservation performance is good, and the temperature drop of molten steel is low.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy continuous casting, and relates to a low-alkalinity and low-carbon tundish covering agent for wear-resistant steel and an application thereof. Background technique [0002] Tundish covering agent is one of the important auxiliary materials in the production process of steel continuous casting. The tundish covering agent evenly covers the molten steel in the tundish, which can effectively play the role of heat insulation, preventing secondary oxidation of the molten steel and continuously absorbing the floating inclusions in the steel. In the industrial production process of iron and steel materials, the tundish covering agent has an important influence on the continuous casting and the quality of the slab. [0003] Wear-resistant steel is a special steel that began in the second half of the nineteenth century. It has strong work hardening ability when used under the condition o...

AI Technical Summary

Problems solved by technology

During the smelting process, there are often problems such as excessive temperature drop in the tundish, poor spreadability, and serious oxygen increase.