Preparation method of continuous-casting tundish working lining slag line coating material

Abstract

The invention discloses a continuous casting tundish working lining slag line coating and a preparation method thereof. The continuous casting tundish working lining slag line coating comprises the following components in percentage by mass: 33-37wt% of dead-burnt magnesia with a particle size of 1-3 mm, 47-53wt% of dead-burnt magnesia with a particle size of 0.3-1 mm, 9-11wt% of dead-burnt magnesia with a particle size of 0.088 mm, 2.3-2.7wt% of silica micropowder, 0.1-0.2wt% of sodium tripolyphosphate, 0.6-0.7wt% of calcium lignosulphonate, 0.1-0.3wt% of industrial salt, 0.8-1.2wt% of wood fiber, and 0.4-0.6wt% of alumina powder. The continuous casting tundish working lining slag line coating disclosed by the invention not only saves the cost, but also is relatively high in strength, thermal shock resistance and spalling resistance, excellent in melt or gas erosion resistance, good in coating property and adhesion property of protected materials, and not cracked, peeled off or subjected to chemical reaction with parent materials in the process of application.

Description

[0001] The patent application of the present invention is a divisional application of the invention title "a continuous casting tundish working slag line coating material and its preparation method". The application date of the original application is December 9, 2013, and the application number is 2013106642093. technical field [0002] The invention relates to the field of metallurgy, in particular to a continuous casting tundish working slag line coating material and a preparation method thereof. Background technique [0003] The refractory materials for the slag lining line of the continuous casting tundish vary from good to bad, and are composed of various refractory materials. 2 o 3 The content is generally greater than 90%. (2) Aluminum-silicon smear: Depending on the aluminum content and the raw materials used, it can be divided into mullite smear (use electric baking or sintered mullite as raw material), high-alumina smear (use bauxite clinker as raw material), cl...

AI Technical Summary

Problems solved by technology

[0004] These slag line coating materials for continuous casting tundish work have the following defects: unreasonable product formula, unstable product quality, and do not pay attention to whether the matching between product performance and specific service conditions is economical and reasonable in order to ensure the service life, and there is "overkill and underutilization" type of energy waste, because the service life of the working lining of the continuous casting tundish depends on the life of the weakest slag line part, in order to achieve the overall life, the domestic Al 2 o 3 ~SiO2 series materials are more common Al 2 o 3 surplus phenomenon, it seems that the material used Al 2 o 3 The higher the content, the more wear-resistant and durable, often leaving an excessive insurance factor in the selection of materials, resulting in a certain surplus of functions and waste of materials

Excessive Al 2 o 3 It may cause problems in thermal shock resistance, spalling resistance, volume stability and heat conduction. This kind of waste is equivalent to the waste of resources. biggest problem