Refractory News

This paper reviews the application technology, construction methods, and online maintenance and repair technology of magnesia-carbon bricks for converters. It analyzes the damage mechanism of magnesia-carbon refractories during use, discusses the development trends of low-carbon magnesia-carbon bricks and environmentally friendly rapid repair materials, and proposes relevant suggestions. Converters play a role in steelmaking, including decarburization,

In response to the severe erosion of the lining of double-nozzle fully refined steel ladles, which affects the safe use of the ladles and restricts smooth production, this study investigated ways to extend the service life of double-nozzle fully refined steel ladles. Through the development and application of technologies such as composite lining construction, refining

The factory currently has five 210t converters, as well as refining equipment such as CAS, LF, and RH, producing a wide range of products including pipeline steel, automotive steel, shipbuilding steel, and silicon steel. Prior to 2009, the ladle refractory bricks used were internally packed. In the production of low-end steel grades and when the

Reducing the production cost per ton of steel is an effective way for steel companies to improve their competitiveness. Minimizing controllable heat loss within the ladle is an effective measure to reduce production costs and save energy. By covering the ladle and using corresponding cover-opening devices, radiative heat loss is significantly reduced. The ladle is

Given the unique characteristics of electric furnace cast iron smelting, foundry professionals must update their thinking in many areas—including cast iron composition selection, charge composition, scrap steel usage, inoculation processes, carbon enrichment and de-carbonization, sulfur enrichment and de-sulfurization, spheroidization processes, creep hardening processes, temperature control, and pouring techniques—and adopt practical measures to ensure and improve

Electric furnace covers are subjected to both high temperatures and frequent rapid heating and cooling, placing high demands on refractory materials. The refractory materials used in electric furnace covers in my country have evolved from initially using large, specific silica composite bricks, to non-fired high-alumina bricks prepared with various binders (water glass, phosphoric acid, aluminum

The design of the electric furnace, as well as the selection and arrangement of the refractory materials used for its lining, significantly influence the operating cycle of the converter. The following details the design of the electric furnace’s roof, hearth, and furnace chamber, along with the configuration of the refractory materials utilized for the lining.

1.Check the furnace body’s operating condition This includes the inspection and treatment of the furnace body yoke, hydraulic system, water cooling system, induction coil and its insulating varnish, coil paste, and empty furnace test. (1) Visually inspect the furnace body yoke fastening screws for looseness. If loose, they must be tightened. At the same time,

The working frequency of a medium-frequency induction electric furnace (hereinafter referred to as a “medium-frequency furnace”) ranges from 50 to 2000 Hz, and it is widely utilized for the smelting of both ferrous and non-ferrous metals. Compared to other casting equipment, medium-frequency induction furnaces offer numerous advantages, including high thermal efficiency, short melting times, minimal

High-alumina bricks are aluminum silicate refractory materials containing an Al₂O₃ content of 48% or higher. Due to their high alumina content, they are classified as high-alumina refractory materials. They can also be categorized into grades based on their Al₂O₃ content; for instance: First-grade high-alumina bricks contain >75% Al₂O₃; Second-grade high-alumina bricks contain 65%–70% Al₂O₃; and

The task of thermal insulation construction is to assemble the primary insulation layer, reinforcing materials, and surface finish materials into a thermal insulation structure according to design specifications. Currently, there are seven commonly used construction methods for thermal insulation structures. 1.Coating insulation method Using unshaped insulation materials (such as expanded perlite) mixed with a binder

When selecting and purchasing refractory materials, we often find ourselves overwhelmed by their diverse performance metrics, operating temperatures, and application ranges. However, understanding the raw materials used in various refractories enables quick identification of suitable options. Therefore, today we introduce the 8 most common raw materials for refractories used in the high-temperature kiln industry. This