Hot-state repair material made from waste magnesia-carbon brick and used for converter and preparation method thereof

Abstract

The invention relates to a hot-state repair material made from waste magnesia-carbon bricks and used for converters and a preparation method thereof. The invention adopts the technical scheme as follows: the hot-state repair material made from waste magnesia-carbon bricks and used for converters is produced by preparing the following raw materials: 45 wt% to 70 wt% of waste magnesia-carbon brick particles, 5 wt% to 15 wt% of graphite and 15 wt% to 40 wt% of forsterite fine powders, adding elemental silicon powders of 1 wt% to 10 wt% the total weight of the raw materials and liquid asphalt-modified phenol-formaldehyde resin of 15 wt% to 25 wt% the total weight of the raw materials, and stirring for 5 to 30 min. The hot-state repair material is muddy. When the hot-state repair material is used, the hot-state repair material is poured into a converter, the converter is shaken to make the hot-state repair material flow to the positions required for hot-state repair of the feed port, the steel discharge port, the face and the bottom of the steel-making converter feed, and the hot-state repair material is sintered by the heat inside the converter. The hot-state repair material has the characteristics of abundant raw materials, low production costs, hydration resistance and facilitation of improvement on the service life of a converter lining material.

Description

technical field [0001] The invention belongs to the technical field of repairing materials, and in particular relates to a hot repairing material for a converter using waste magnesia-carbon bricks as a raw material and a preparation method thereof. Background technique [0002] In the past two decades, carbon-containing refractory materials have been widely used in high-performance refractory materials due to their excellent performance, especially in the steelmaking converter lining materials in the iron and steel metallurgical process, making the converter lining materials The life span is greatly improved. In the process of using carbon-containing refractories as converter lining materials, it is necessary to carry out hot on-line repairs on the parts of the furnace lining materials that are severely eroded locally, so as to maintain the service life of the entire converter lining materials. [0003] At present, the hot on-line repair materials used in steelmaking conver...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the technical defects of the existing hot-state repair material for converters, and aims to provide a method for preparing a hot-state repair material for converters with low production cost and easy industrial production, which uses waste magnesia-carbon bricks as raw materials