EAF Refractories

Refractory brick The use of kilns is inseparable from refractory bricks, but if the details of refractory bricks are not properly handled during the masonry process, it will bring a lot of trouble to the later use. Therefore, when building refractory bricks, pay attention to the angle and also Pay attention to the location, as far as possible, choose refractory bricks with good refractory material performance, and there will be no thermal expansion and contraction and chemical reactions during use, as described in detail below. How to choose refractory brick: 1. Resist the effect of high temperature heat load, not softening or melting. Refractory bricks are required to have a fairly high degree of refractoriness. 2. Resist the effect of high temperature heat load, the volume does not shrink and only uniform expansion. It is required that the material has high volume stability, the residual shrinkage and residual expansion should be small, without crystal form transformation and

Cracks may occur in refractory lining during service, so it is very important to know the extent of refractory resistance to crack propagation. The advantages of advanced pourable system over compact conventional castables and bricks can be easily seen by comparing the WOF values. Low Cement Castables have the best fracture resistance below 1100 C. Ultra-low cement and cement-free products produce better values at higher temperatures. The main advantage of these castables for users is that they are tougher than other similar refractories such as bricks, plastic refractories or traditional castables. Many applications of refractory castables require wear resistance or corrosion of castables. Most of these applications are in the range of moderate to low temperatures (below 1100 degrees Celsius). For wear-resistant applications, advanced pourable systems such as low cement, ultra-low cement, high cement, low moisture and chemically bonded castab

Types of light thermal insulation bricks Lightweight thermal insulation bricks are divided into many kinds according to the materials used, such as clay, silica and high alumina, which are called lightweight clay bricks, lightweight silica bricks and lightweight high alumina bricks. The composition, characteristics, service temperature and uses of lightweight insulating bricks are as follows: 1.Lightweight clay thermal insulation brick : used for various industrial kilns and furnaces without contact with Molten Substances and without the role of corrosive gas insulation layer material. 2.Lightweight High Aluminum Insulation Brick 3.Mullite Light Thermal Insulation Brick 4.Silica thermal insulation brick: It is suitable for use in high temperature kiln without contact with molten slag, such as the thermal insulation material of the lining of silica brick in large blast furnace and the thermal insulation of silica brick masonry in glass kiln. Article S

High Alumina Brick High alumina brick is a kind of neutral refractories. It is manufactured from bauxite or other refractory raw materials within high alumina formed by molding and calcination. High aluminum refractory bricks has high refractoriness, high load softening temperature, thermal shock stability, good slag resistance, acid, alkali, peeling resistance, erosion resistance and so on. High alumina brick is mainly used for electric furnace top, blast furnace, hot air stove, ladle, cement kiln, glass kiln and other thermal furnace lining. High alumina brick is widely used in iron, steel, chemicals, cement and other industries. Article source: http://www.ruizhirefractory.com/en/product/high-alumina-brick.html Email: sales@ruizhirefractory.com

Silica Ramming Mass Silica ramming mass also known as acidic ramming mass.The raw material of silica ramming mass is high quality quartz, mixed with high quality boric acid. Silica content of its raw material is more than 99%. Generally we will add 1 % to 1.5 % to premix with quartz, but it can be changed as per customers’ requirements. Silica ramming mass is one of the most popular products in our company. Plays a crucial role in induction furnaces during melting of steel. This substance is used to line induction furnaces and its quality decides smooth working and more efficient output from the furnace. Our monthly production capacity is 10,000MT/month. Advantages of Silica ramming mass: High erosion resistance. High bonding strength. Free engineering services to guarantee service life. Does not expand or shrink with temperature changes Article source: http://www.ruizhirefractory.com/en/product/silica-ramming-mass.html Email: sales@ruizhirefractory.com

Optimize the furnace campaign The magnesia carbon brick at the door of the furnace is the weak point of the closed-loop masonry of the furnace wall. Magnesia carbon bricks will have a large thermal expansion after undergoing smelting high temperature, and will be released in the doorway area to make the magnesia carbon bricks arch. For this reason, when adding magnesia carbon bricks at the door of the furnace, by adding special materials, a 1-2mm brick joint is reserved to meet the expansion space between the magnesia carbon bricks and eliminate the thermal expansion effect. The furnace door electrode is used to fix the furnace door brick, which is convenient for slag cleaning. The graphite electrode is used in traditional masonry. Because of its short burning life, it is replaced by steel water-cooled analog electrode, which solves this problem and saves the service life. Can reach more than 2000 furnaces. Article source: http://www.ruizhirefractory.com/en/new/optimize-the-furnace-cam