Function protecting material for special ASP ultra-low carbon continuous casting crystallizer

Abstract

The invention discloses a function protecting material for a special ASP ultra-low carbon continuous casting crystallizer, comprising the following components by weight percent: 1.5 percent of carbon black, 4.5 percent of bentonite, 15 percent of fluorite, 4.0 percent of manganese dioxide, 7.0 percent of white alkali, 4.0 percent of sodium fluoride, 2.0 percent of alum clay, 3.0 percent of magnesia, 1.0 percent of lithium carbonate, 9.5 percent of glass and 48.5 percent of wollastonite. Field test results show that when the function protecting material is used, the continuous casting crystallizer has better internal spreading property, thermal insulating performance and melting property, no slag, and normal flame; and the periphery in the crystallizer has stable and even heat transfer quantity, stable thermocouple heat flow, stable friction force and no occurrence of viscosity alarm, thereby meeting the requirement of high casting speed. A casting billet has no fire slag and slag sticking on the surface and no carburization, thereby meeting the requirements of a steel plant.

Description

technical field [0001] The invention belongs to the technical field of metallurgical auxiliary materials, and specifically relates to an ASP ultra-low carbon special continuous casting crystallizer functional protection material. CSP is low. Background technique [0002] In recent years, ultra-low carbon steel (including C ≤ 0.03) has achieved rapid development, gradually replacing aluminum-killed steel as the third generation of deep-drawing steel. The composition characteristics of ultra-low carbon steel are: ultra-low carbon content, microalloying, and pure steel. The production of ultra-low carbon steel has become a symbol of a country's production level of steel sheets for automobiles. my country's ultra-low carbon steel production of medium and heavy plates is relatively mature with Baosteel, Anshan Iron and Steel, and Wuhan Iron and Steel. ASP ultra-low carbon is still in its initial stage. Due to many limiting factors such as smelting conditions and continuous cast...

AI Technical Summary

Problems solved by technology

However, the realization of high-speed continuous casting technology has brought many new problems to the continuous casting process. For example, as the casting speed increases, the relative consumption of continuous casting functional protective materials decreases; the lubrication between the mold wall and the solidified billet shell Insufficient, uneven heat transfer; resulting in surface defects of the slab, and even cohesive breakouts, etc.