Introduction to Clay Refractory Mud

Clay refractory mud is a refractory material with clay and fine stone powder as the main materials. It is mainly used for repairing high-temperature furnaces, ovens, chimneys, stoves, fireplaces, and other refractory structures, sealing boundary interfaces, laying refractory bricks, and bonding insulation materials. Clay refractory mud has high-temperature resistance and fire resistance. It can still maintain stable performance under high-temperature conditions below 1500°C and is not easy to fall off or crack. In addition, clay refractory clay also has good plasticity and adhesion, so it can be easily shaped into various complex shapes and structures. Clay mud with a specific viscosity is made by mixing powdered clay and water. When using, first clean the area to be repaired, stick the clay refractory mud to the location that needs to be repaired, and fully compact it. The clay refractory clay will then harden rapidly over time to form a strong repair layer that is very fire resistant. It is worth noting that clay refractory mud is only suitable for low-temperature combustion or heating places. If used at high temperatures, the clay refractory mud may fall off or crack, thereby reducing the performance of the clay refractory mud, for places used at...

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Composition and Characteristics of Clay Refractory Bricks

Clay refractory bricks are a common type of refractory material with good fire resistance, corrosion resistance, and mechanical strength. They are widely used in various high-temperature environments in industrial equipment, furnaces, and buildings. Material composition and characteristics of clay refractory bricks The main components of clay refractory bricks are clay and kaolin, and a certain proportion of auxiliary materials such as quartz sand, bauxite, and coal gangue are usually added. The content of clay is usually between 50% and 70%, while the content of kaolin is between 10% and 30%. Clay refractory bricks have the following characteristics: 1. Good fire resistance: Clay refractory bricks have good high-temperature resistance, usually able to withstand temperatures above 1000℃, and some can even reach temperatures above 1500℃. 2. Strong corrosion resistance: Clay and kaolin in clay refractory brick materials contain high levels of silicates and aluminates, which can resist various acids, alkalis, salt, and other chemical corrosion. Therefore, they are widely used in fields such as chemical engineering, metallurgy, and power. 3. Good wear resistance: Clay refractory bricks have high hardness and density, and their surface is not easily worn, so they can maintain surface smoothness and mechanical strength for a long time at...

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Introduction to High Aluminum Wear-resistant Castables

High aluminum wear-resistant castable is a specially designed refractory material with high fire resistance and good wear resistance. This material is mainly used for the refractory lining of various high-temperature industrial furnaces, especially those parts that need to withstand high wear. The following is a detailed introduction to high-aluminum wear-resistant castables. Main ingredients and raw materials High-aluminum wear-resistant castables are based on high-aluminum materials (such as alumina, corundum, etc.), and add other auxiliary materials (such as quartz powder, mica, calcium silicate, etc.). In addition, special wear-resistant materials such as zirconia, corundum, etc. are added to improve the wear performance of the material. Features and performance 1. Fire resistance: High aluminum wear-resistant castable has excellent fire resistance and can withstand high temperatures up to 1800°C. Its high fire resistance is mainly due to the high content of alumina and corundum, two materials with high melting points and good fire resistance. 2. Wear resistance: Special wear-resistant materials are added to high-aluminum wear-resistant castables to improve the hardness and wear resistance of the material. This gives it a long service life under high temperatures and high pressure conditions. 3. Slag resistance: High-aluminum wear-resistant castables have good slag resistance and can effectively resist the...

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Characteristics of Silicon Carbide in Silicon Carbide Refractory Materials

Silicon carbide, also known as emery or refractory sand, is a ceramic-like compound formed by bonding silicon and carbon. Emery exists in nature in the form of a rare mineral such as moissanite. There are very few natural ones, and the ones used in industry are all synthetic raw materials. Silicon carbide is the main raw material for silicon carbide bricks and silicon carbide castables. Today I will give you a brief introduction to some aspects of silicon carbide, hoping it will be helpful to you. There are at least 70 crystal forms of silicon carbide. α-SiC is the most common allomorph. It is formed at high temperatures above 2000℃. It has a hexagonal crystal structure (like wurtzite). The unit cell is a face-centered cubic structure. Each unit cell contains 4 C atoms and 4 Si atoms. Similar to diamond structure. β-SiC, with a cubic crystal structure, is similar to diamond. It is generated below 2000℃. β-SiC will transform into α-SiC above 2100℃. As for another type of silicon carbide, μ-SiC is the most stable and there is a more pleasant sound when colliding. These two types have not yet been commercially applied. The silicon carbide produced industrially in my...

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What is Unshaped Refractory Material

Unshaped refractory materials mainly include three types: refractory castables, refractory mortars, and refractory cement. Refractory castables are the most widely used unshaped refractory materials. It is mainly used for the lining of heating equipment such as various heating furnaces and kilns. Some high-quality varieties can also be used for high-blast furnaces. Refractory mortar is a joint refractory material (available in powder form and mud form). Used as joint material for refractory masonry. It consists of refractory powder and admixtures, and of course, the finished product is usually mixed. Refractory cement comes in two forms: dry powder (in bags) and mud (in barrels). Refractory cement (not ordinary cement) is a refractory material used as a binder and refractory powder when manufacturing refractory castables. It is a semi-finished product. The summary is: that both castables and refractory cement are refractory products that can be used directly; while refractory cement is the binder of refractory castables (refractory concrete) and cannot be used alone. Fireclay as a raw material is often called “refractory clay” and is usually made into clay bricks and clay refractory castables. But for “refractory clay”, we generally should not think of it as “refractory mortar”. Usually refractory mortar is considered...

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Types, Materials, and Applications of Refractory Balls

Refractory balls, also known as refractory ceramic balls, are usually made of industrial alumina and refractory kaolin as the main aggregates. They are known for their high mechanical strength, long life, strong chemical stability, and impressive heat resistance. , some variants of which are capable of withstanding temperatures up to 1900°C. Application of refractory balls Refractory balls are especially suitable for high and low-temperature conversion furnaces, reforming furnaces, hydro converters, desulfurization tanks, methanation furnaces, etc. in fertilizer plants. They disperse gases and liquids and support, cover, and protect catalysts. Additionally, these refractory ceramic balls are used in hot blast furnaces and heating retrofit equipment in the steel industry. Types and materials of fire-resistant balls 1. Based on refractoriness Refractory ceramic balls are divided into ordinary refractory balls and high alumina refractory balls. Ordinary refractory balls are suitable for converters and converters in the sulfuric acid and fertilizer industries, while high-aluminum refractory balls are suitable for hot blast furnaces and heating converters in urea, steel, and other industries. 2. Based on materials Refractory balls can be made from a variety of materials, including high alumina, silica, and magnesium aluminum, each with different properties making them suitable for specific applications: High aluminum...

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The Advantages of Chrome Corundum Bricks

The main ingredients in chrome corundum bricks are alumina and chromium, which are held together by a solid binder. The specific bonding mechanism can vary based on the manufacturing process and the specific composition of the brick. Chrome corundum bricks are known for their unique composition and properties. It is widely used. Today I will take you to understand its characteristics. 1. High-temperature resistance: Chrome corundum bricks have excellent thermal stability and are suitable for use in high-temperature environments. They can withstand temperatures up to 1800°C, making them ideal for applications in industries such as steel, cement, glass, and non-ferrous metals. 2. Chemical resistance: Chrome corundum bricks have strong resistance to chemical corrosion, especially to alkali, slag, and molten metal. This corrosion resistance allows it to maintain structural integrity and performance in harsh chemical environments, making it suitable for use in furnaces and kilns where corrosive materials are present. 3. Wear resistance: Chrome corundum bricks have excellent wear resistance, making them durable. They can withstand the aggressive action of abrasives and ensure a long service life even in highly abrasive environments such as cement kilns or ladles. 4. High Mechanical Strength: These bricks have high compressive strength and structural integrity,...

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What are the Types of Refractory Cement?

Refractory cement is also called aluminate cement, also known as high-temperature cement. It is made of high-quality bauxite and high-quality lime as raw materials and is mixed into an appropriate amount of raw material in a certain proportion. After sintering, the resulting cooked product has aluminate as the main component. The material is then ground into fine powder to make a fire-resistant hydraulic cementitious material called refractory cement. The refractory degree of refractory cement is not less than 1580 degrees Celsius. According to different compositions, it can be divided into aluminate refractory cement, low calcium aluminate refractory cement, calcium magnesium aluminate cement, and dolomite refractory cement. Cement is added with special materials used in the preparation of high-temperature resistant (fire-resistant) concrete. There are: Low calcium aluminate refractory cement with pure bauxite and limestone as the main raw materials. Dolomite high-temperature cement is made from dolomite as the main raw material and then added with apatite, iron ore, etc. Materials that can produce chemical reactions and harden at high temperatures, such as high-temperature-resistant cement with refractory sulfates, borates, and phosphates as cementing materials, are used. Refractory cement product classification 1. Aluminate refractory cement Also called high alumina cement, it is the...

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Types, Characteristics, and Applications of Zirconium Corundum Bricks

Zirconium corundum brick refers to a refractory brick containing 30~41% ZrO2. The main mineral composition is corundum, baddeleyite, and glass phase. Zirconium corundum brick is a white solid formed by melting pure alumina powder and zircon sand containing about 65% zirconium oxide and 34% silica in an electric furnace and then pouring it into the mold for cooling. Its petrographic structure is composed of corundum. It is composed of the eutectoid of zircon plagiolite and the glass phase. From a phase perspective, it is the eutectoid of the corundum phase and the zircon plagiolite phase. The glass phase is filled between their crystals. 1. Types of zirconium corundum bricks Fused zirconium corundum brick. Also known as fused AZS bricks. It is made of industrial alumina and selected zircon, with a small amount of Na2CO3 added for electrofusion. When producing zirconium corundum bricks with high ZrO2 content, some ZrO2 needs to be added. Molten zirconium corundum bricks are commonly known as tinplate bricks and also called corundum clinched zircon bricks. These cast materials are produced by arc melting, subsequent casting into molds, and long-term heat treatment. The main chemical components are Al2O3 50%~70%, ZrO2 20%~40%, and the rest is SiO2. The...

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The Difference between Clay Refractory Bricks and High Alumina Bricks

There are two main types of refractory bricks commonly used: clay refractory bricks and high alumina bricks. These two types of refractory bricks are very different in appearance from physical and chemical indicators, and their uses are also very different. So how to distinguish these two types of refractory bricks? Today I will briefly introduce it to you in an article. 1. Clay refractory bricks Clay refractory bricks are the earliest refractory building materials. They use high-alumina vanadium clay as the main raw material and are used for lining high-temperature kilns to provide thermal insulation. Clay refractory bricks are the main varieties of silicon-alumina series products. It is a refractory product using clay clinker as aggregate and an Al2O3 content of 30-48%. Clay bricks are divided into ordinary clay bricks and low-creep clay bricks according to their Al2O3 content. Ordinary clay bricks are divided into RN-42 and RN-40. Low creep clay is divided into DRN-45\DRN-42\DRN-40, etc. The mineral composition of clay bricks is mainly kaolinite (Al2O3·2SiO2·2H2O) and 6% to 7% impurities (potassium, sodium, calcium, titanium, iron oxides). The firing process of clay bricks is mainly a process in which kaolinite continuously loses water and decomposes to form mullite (3Al2O3·2SiO2) crystals....

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