EAF Cover

EAF Cover Introduction:

The EAF cover is designed to extend the life of the EAF top. According to the basic principle of refractory materials and different electric furnace operating conditions, corundum castables are used for on-site casting or pre-fabrication. EAF cover has the Product advantages of convenient construction, erosion resistance, good thermal shock resistance and long service life.

The pouring of the electric furnace cover mainly uses corundum and special grade alumina as refractory materials, adding other additives such as mullite, kyanite, etc., and preparing them according to the formula ratio. After fully mixing, adding appropriate water can be used for construction.  High-alumina castable as the castable for electric furnace cover has good thermal shock resistance, strong wear resistance and corrosion resistance, high high temperature and compressive strength, good peeling resistance and slag resistance, and is suitable for the working environment of electric furnace cover.

The electric furnace cover is cast off-site and can be transported to the steel plant for direct use.  The electric furnace cover cast with high-aluminum castable has good integrity and convenient construction, which is better than refractory brick masonry. It is currently one of the refractory products used for the electric furnace cover.

EAF Cover Advantages: 

convenient construction and long service life.

Electric Furnace Cover Classification:

Refractory bricks are required to have good thermal shock resistance, corrosion resistance to high-temperature slag splashing, and integrity, and the most important thing is to ensure that the structure is firm and does not crack. 

1.Silica refractory brick stove cover. It is built with silicon refractory bricks, which is light in weight and low in price, and has good high-temperature structural strength and creep resistance. However, the molten siO2 at high temperature produces continuous droplets, which leads to a decrease in slag reduction and affects smelting operations. Therefore, high-alumina bricks with better performance were later used. 

2. High alumina brick furnace cover. The non-fired high-alumina refractory bricks with 80% high-alumina brick content combined with phosphate and fired mullite bricks or non-fired phosphate-combined mullite bricks all have good thermal shock resistance in common. 

3. Alkaline refractory brick stove cover. Magnesium bricks for electric furnace covers can stabilize the structure of the furnace cover, but iron sheets must be used to insert iron sheets during masonry. However, the linear expansion coefficient of magnesia brick is too large, and the dosage is not much. Other alkaline bricks such as magnesia chrome, chrome magnesia, dolomite, magnesia aluminum. With excellent fire resistance and corrosion resistance to iron oxide and molten slag, the service performance is better than high alumina bricks under harsh conditions. 

4. Casting furnace cover as a whole. The integral casting furnace cover promotes the further improvement of the life of the furnace cover. After the furnace cover is water-cooled, the electrode is also water-cooled. From the material, high-aluminum ultra-low cement castable and stainless steel fiber are used, and the life span is increased by 3-4 times.