It is of importance to select and use the proper electric arc furnace refractory materials within the steelmaking industry. The primary purpose of these refractories is to safeguard the furnace lining, enhance heating efficiency, ensure steel quality, and prolong the furnace’s service life.

Given the necessity to withstand a range of formidable challenges, such as high temperatures, slag erosion, physical impact, and chemical erosion, the selection of the right refractories plays a vital role in the steelmaking process. This article will deliver a comprehensive analysis of some of the leading electric arc furnace refractories used in steelmaking, outlining their properties and functions to provide you with a better understanding of these crucial aspects.

What Are Electric Arc Furnace Refractory Materials?

The steelmaking electric arc furnace system mainly utilizes a wide array of refractory materials, including magnesia-carbon bricks, EBT bricks, hot repair mass, cold ramming mass, gunning, sand filling at the taphole, and more.

Characteristics and Roles of Electric Arc Furnace Refractories

• Magnesium-carbon Brick

The working layer bricks for steelmaking electric arc furnaces——magnesia carbon bricks, primarily use large crystalline high-purity fused magnesia and pure flake graphite as their main materials. During the manufacturing process, these materials are mixed with resin and added with composite antioxidants, and are shaped using advanced high-pressure molding technology.

The MgO-C bricks we offer exhibit outstanding characteristics, such as low porosity, high-temperature strength, corrosion resistance, and resistance to spalling. To meet customers’ individual requirements, we provide various models of magnesia carbon bricks designed for different smelting conditions, including the slag line, hot spots, and the tap hole.

• Tap Hole Brick

EBT bricks are made of high-quality fused magnesia and highly pure flake graphite. The manufacturing process includes high-pressure pressing and isostatic pressing. This brick has excellent characteristics such as low porosity, good corrosion resistance, oxidation resistance and long service life.

• Hot Repair Mass

Hot repair mass play a significant role in the steelmaking process in an electric arc furnace. When there is a need to replace the taphole, these materials can fill the gap between the bricks and the bottom of the electric arc furnace. Additionally, in the case of local depressions or cracks on the furnace’s bottom, hot repair materials can assist in minor repairs. This repair material is a blend of high-quality iron, calcium, magnesium components, and a unique organic binder. Our hot repair materials series exhibits excellent high-temperature and corrosion resistance, thereby providing your electric arc furnace with durable and reliable protection.

• Cold Ramming Mass

The cold ramming mass for the electric furnace bottom is manufactured through cold pressing and is composed of high-purity magnesium oxide, high-quality magnesium calcium iron composite materials, and additives. It possesses several key characteristics, including a simple structure, excellent sintering performance, strong integrity, high resistance to molten steel permeation, corrosion resistance, absence of floatation, and a long service life.

• Gunning

The Gunning for electric arc furnace steelmaking is specifically designed for the steelmaking process in electric arc furnaces. It is primarily composed of fused magnesia and composite binding agents. This spray material exhibits numerous excellent characteristics, including strong adhesion, low rebound rate, ease of sintering, corrosion resistance, and wear resistance.

• Tap hole filling mass

The sand filling at the taphole for electric arc furnaces is a high-quality refractory material designed specifically for the steelmaking process in electric arc furnaces. It features a unique formula, primarily composed of various proportions of high-quality magnesia, olivine, quartz materials, and suitable additives. This sand filling material offers numerous advantages, including ease of construction, excellent sintering performance, strong slag resistance, absence of floatation, and safety in usage.

Conclusion

The above is a detailed introduction to the electric arc furnace refractory materials. In addition to supplying refractory materials for the electric furnace, ZTM company also has a comprehensive overall contracting ability for refractory materials in the electric furnace system, providing a full range of solutions from lining structure design to product production, supply, construction, maintenance, dismantling, and new product research and development. With our professional technical team and rich industry experience, we provide one-stop service to ensure that your electric furnace system operates safely, stably, and efficiently.

If you have any questions or needs regarding refractory materials for the electric furnace, please feel free to contact us. We will serve you wholeheartedly and look forward to cooperating with you! We will jointly discuss the selection, application, and optimization of refractory materials, providing customized solutions for your electric furnace system.