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　　 Casting electric furnace This is a medium-frequency induction furnace used on equipment originally employed in the casting industry. Casting is a manufacturing process in which metal is melted into a liquid meeting specific requirements and then poured into molds. After cooling and solidification, followed by cleaning and finishing operations, the castings attain the desired shape, dimensions, and properties.

　　Casting electric furnace—product-type electric furnace

　　Since the billets are nearly shaped, achieving the goal of minimal or no further machining, this approach to some extent reduces both the cost and time associated with casting blanks. Casting is one of the fundamental technologies in modern manufacturing. Using medium-frequency induction furnaces enables more efficient and energy-saving casting processes, reducing costs and minimizing environmental impact. Entering the 21st century, the casting industry will gradually phase out traditional coal-fired burners and adopt... Casting electric furnace 。

　　In recent years, the number of newly built foundries has been increasing steadily, leaving many companies caught in a dilemma between cupola furnace melting and induction furnace melting. To determine which smelting method—cupola furnace or electric induction furnace—is better, let’s compare them from several perspectives: process technology, materials used, investment costs, environmental impact, and sustainability.

　　The internal quality of molten iron must ensure the performance and reliability of castings; therefore, the melting quality of molten iron is a critical step in the casting production process.

　　Today, the whole world is paying close attention to environmental protection. As society continues to develop and progress, people’s awareness of environmental protection is steadily increasing, and their expectations for environmental protection are becoming ever higher. Consequently, choosing the right melting equipment is becoming increasingly important. That’s why, in the construction of our new foundry, we’ve opted for cupola furnaces and electric casting furnaces for melting.

　　2. Cupola furnace and Casting electric furnace Melt the characteristics of each.

　　2.1. Characteristics of cupola furnace melting

　　2.1.1 Advantages of cupola furnace smelting:

　　The cupola furnace is currently a widely used iron-smelting equipment that utilizes coke as its fuel. The heat generated from the combustion of coke is directly applied to melt the charge materials and raise the temperature of the molten iron, making it more energy-efficient than electric arc furnaces and other types of furnaces. Moreover, the cupola furnace boasts relatively simple equipment, making it suitable for both large and small-scale factories. Since the 1970s, significant breakthroughs have been achieved in the modernization of cupola furnace technology. Today, computer-assisted operation of cupola furnaces has enabled fully automated production, maintaining high efficiency while also meeting environmental protection requirements. To date, countries around the world still rely primarily on cupola furnaces for iron smelting, often combining them with induction furnaces to further enhance overall thermal efficiency, precisely adjust and homogenize the chemical composition of the molten iron, and adapt to large-scale production needs.

　　It can continuously produce molten iron. The large-scale, water-cooled, lining-free cupola furnace boasts an extended service life and can operate continuously for up to 300 hours.

　　The equipment has low costs. Although cupola furnace equipment has relatively low initial costs, it can effectively remove smoke and dust, and its exhaust gas purification system meets environmental protection requirements. The cost of dust removal equipment alone is more than five times that of the cupola furnace equipment.

　　2.1.2 Disadvantages of cupola furnace smelting:

　　The smelting process emits large amounts of dust and exhaust gases, which can easily cause environmental pollution.

　　During the cupola smelting process, since the molten iron comes into direct contact with coke, the molten iron undergoes a carbon- and sulfur-enrichment process. The absorption of sulfur from the coke by the liquid iron is detrimental to the production of ductile iron castings. When the charge materials in the cupola melt, the mass fraction of sulfur often increases by 50% to 100%. Sulfur from the coke enters the molten iron in two different ways.