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Henan Changxing Refractory Material Co.,Ltd.

EAF Furnace Refractory

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EAF Bottom Ramming Mass

EAF Refractories

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EAF Bottom Ramming Mass Introduction: EAF Bottom Ramming Mass is suitable for high-power EAF, ultra-high-power EAF bottom, furnace slope and other parts. Dry ramming mass can be used for the bottom of DC and AC EAF furnace, carried out construction by ramming. Ramming mix for EAF production technics: 1.Based on high purified compound dolomite sand and high purified magnesia.2.Add magnesia iron sand.3.Adding certain quantity of anchoring agent . EAF Bottom Ramming Mass Use method :1.Spread the material in the bottom with thichness of100mm to 150mm and rammed hard, 2.Clean the surface, repeat the ramming work once again3.Put a piece of steel sheet on the surface to avoid damage on the surface when putting scrap and hot metal.4.Knotting quality inspection method: use a 4mm diameter iron rod, such as φ 4mm welding rod, the insertion depth does not exceed 20mm. EAF Bottom Ramming Mass Advantages: 1.Easy to sinter ;2.Strong anti-permeability;3.High refractoriness;4.Long service life.5.Good sintering property and strong corrosion resistance6.It can be constructed for the first time, and can also be hot-repaired.
EAF Back Filler

EAF Refractories

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EAF Back Filler Introduction：EAF back filler is made of burnt magnesia as raw material, which has the characteristics of good construction performance, erosion resistance, erosion resistance, etc. It has good heat preservation performance, high temperature resistance and good thermal shock resistance. The product is a filler between the permanent layer and the working layer of the electric furnace and the ladle, and the filling effect is good. EAF Back Filler Advantages: Convenient construction, erosion resistance, erosion resistance, excellent high temperature resistance, thermal shock stability.
EAF Magnesia Carbon Brick

EAF Refractories

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EAF Magnesia Carbon Brick Introduction：EAF magnesia carbon brick refers to a refractory product made of magnesia and graphite as raw materials for electric furnace lining. EAF magnesia carbon brick has high fire resistance, high corrosion resistance, excellent heat-resistant peeling property, high-temperature volume stability, and high thermal shock resistance. According to the smelting conditions and the smelting steel grade, different quality magnesia carbon bricks can be provided. The main factors that determine the quality of magnesium carbon bricks used in EAF include the purity of magnesite from MgO source, the kinds of impurities, the grain binding state of magnesite and the grain size. EAF walls are almost entirely built with magnesia carbon bricks. Therefore, the service life of magnesia carbon bricks determines the service life of EAF. The main factors that determine the quality of magnesia carbon bricks for EAF include the purity of MgO source magnesia, impurity types, and periclase grain bonding state and grain size; The purity, crystallinity and scale size of flake graphite as the source of carbon introduction; Phenolic resin is usually used as the binder, and the main influencing factors are the addition amount and the amount of residual carbon. EAF Magnesia Carbon Brick Advantages: high erosion resistance, excellent heat-resistant spalling and high temperature stability. The basic requirements of electric furnace for magnesia carbon brick are: (1) The thermal conductivity is low to ensure less heat loss and improve the thermal efficiency of the electric furnace;(2) High thermal chemical and thermal physical corrosion resistance coefficient, which requires good volume stability;(3) Slag resistance, peeling resistance, oxidation resistance and high compressive strength, so as to obtain low consumption and long life.
Magnesia brick

EAF Refractories

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Magnesia brick Introduction:The magnesia brick is made of magnesium oxide as the main raw material. Because of its high refractoriness, magnesia brick has a high specific heat capacity at high temperatures, and is mainly used in the permanent layer of the electric furnace to provide heat storage. The melting point of MgO is as high as 2800℃, and the refractoriness of magnesia bricks is generally high, reaching above 2000℃. Therefore, magnesia bricks have good high temperature resistance, high temperature vacuum stability is good, and strong resistance to alkaline slag. Magnesia brick Advantages: high refractoriness, high specific heat capacity
EBT Taphole Block

EAF Refractories

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EBT Taphole Block Introduction： The taphole block is made of high-crystalline fused magnesia and high-purity graphite and is formed by high pressure. EBT Taphole Block has the Product advantages of good oxidation resistance, high strength, good corrosion resistance, good integrity, convenient replacement and long service life. EBT Taphole Block is an ideal tapping material for large and medium electric furnaces. EBT Taphole Block Advantages:good oxidation resistance, good corrosion resistance, easy replacement.
EAF Cover

EAF Refractories

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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.
EAF Dry Ramming Mix

EAF Refractories

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EAF Dry Ramming Mix Introduction：EAF dry ramming mix is prepared according to the particle packing theory by selecting advanced synthetic raw materials, additives and binders. EAF dry ramming mix has the advantages of strong penetration resistance, corrosion resistance, easy sintering, high packing density and convenient installation. EAF dry ramming mix is an ideal material for electric furnace bottoms in the steel industry. Under normal circumstances, the one-time life of dry ramming mass can reach more than 300 furnaces, and it can be extended to 500~600 furnaces through hot repair, and even some products on the market can reach more than 600 furnaces. Construction of EAF Dry Ramming Mass: Before the construction of the electric furnace bottom dry ramming material, attention should be paid to clean up the permanent layer residue, dust, iron wire, plastic cloth and other foreign objects. Calculate the knot size, the actual knot thickness is equal to the required knot thickness multiplied by 1.09, and a sufficient amount of ramming material should be prepared according to the construction furnace slope and furnace bottom size. After receiving the material, check whether the ramming material has debris. If it is damp, the debris should be cleaned up. The damp material should not be used, and the knotting equipment such as rammers, pneumatic picks, etc. should be prepared. EAF Dry Ramming Mix Advantages: Strong anti-erosion ability and easy installation.
EAF Gunning Mix

EAF Refractories

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EAF Gunning Mix Introduction： With magnesium based and magnesium-calcium based raw material, proper bonding agent and agglutinant, EAF gunning mix has the advantages of high bonding strength, strong erosion resistance and anti-spalling performance. Hot repair effect is better when the temperature is over 1000℃, adhesion rate is over 85%. In the production process of electric furnace steelmaking, it is a very common method to improve the service life of electric furnace refractory linings by optimizing gunning repair materials. Generally, the aggregate material in the EAF gunning material is the same as the material of the gunning furnace lining.  The gunning materials for EAF include magnesia, magnesia dolomite, magnesia chromite, magnesia carbon, magnesia dolomite carbon, etc. in addition, some highly active seawater magnesia is used in the aggregate to promote sintering and improve the density and strength of gunning layer. In order to make gunning materials solidify rapidly and adhere to furnace lining, a small amount of additives are often added to the aggregate. EAF Gunning Mix Advantages: During the smelting process, the EAF gunning mix is subjected to the same high temperature and harsh working environment as the repaired furnace lining. Therefore, the EAF gunning material should not only have high fire resistance, corrosion resistance, erosion resistance, spalling resistance, etc., but also the furnace lining has good adhesion. High bonding strength;Strong erosion resistance;Anti-spalling.
EBT Filler

EAF Refractories

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EBT Filler Introduction: The electric furnace tapping filler is made of specific high-quality olivine sand with high refractoriness for the eccentric bottom electric furnace tap. Before the tapping, put the EBT filler at the tapping platform, and the molten steel can smoothly flow into the ladle through the filler. The automatic opening rate of this product can be more than 90%. EBT filling mass compound is high refractory granular material, which is used in electric arc furnace with eccentric bottom tapping for free and easier opening of tap hole. This does not sinter under steel making temperatures and hence remains highly flow able at high temperatures. EBT Filler Advantages: Easy to use, and with high opening rate