Detailed Application Range of Monomorphic Refractory Castables

Refractory castable is the most widely produced and used type of unshaped refractory. Today, with the rapid advancement of industrial technology, the types of refractory castables are ever-changing. Refractory castables are simpler in application than refractory bricks, save energy, have low costs, and are convenient for mechanized construction. It has been widely used in various types of thermal equipment such as cement, steel, glass, and electric power. 1. Application of refractory castable in cement rotary kiln. In the new dry process cement rotary kiln, refractory castables have been widely used. There are many types of refractory castables used in the kiln. According to the different working environments of the kiln, the refractory castables used include ordinary refractory castables, low cement refractory castables, ultra-low cement refractory castables, cement-free refractory castables, steel fiber refractory castables, anti-burst refractory castables, anti-skinning refractory castables, phosphate refractory castables, alkali-resistant castables, heat-insulating castables, in addition, there are new types of castables such as self-flowing refractory castables. 2. Application of refractory castables in glass melting furnaces. Due to the requirements of the working environment of the glass melting furnace itself, the applied refractory castable should have the characteristics of good high-temperature resistance, strong resistance to glass liquid erosion,...

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The Difference Between Refractory Castable and Refractory Plastic

Refractory castables and refractory plastics are amorphous refractory materials, both of which are composed of refractory aggregates, powders, binders, etc. In addition to the different construction methods, refractory castables have different uses. 1. Refractory Castable Many properties of refractory castables depend to a large extent on the type and amount of binder. In terms of strength, except for those made of light particles, since the strength of the pellets is generally higher than the strength of the binder-hardened body and the bonding strength between the particles, the strength of the castable actually depends on The binding strength of the binder. The fluidity of refractory castables is generally higher than that of refractory ramming mass. Therefore, most of the refractory castables can be placed tightly and filled with the model only after pouring or shaking. After the castable is formed, it is necessary to adopt appropriate methods to promote hardening according to the hardening characteristics of the binder. For example, cement should be protected under proper wet conditions. For some metals, inorganic salts have to be dried and baked, etc. The high-temperature properties of refractory castables are also closely related to the type and amount of binder. If the selected granular...

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Refractory Castables Commonly Used in High-temperature Kilns

What are the refractory castables commonly used in high-temperature kilns? 1. Application of refractory castable in cement rotary kiln. In the new dry process cement rotary kiln, refractory castables have been widely used. According to different working environments of the kiln, the refractory castables used include ordinary refractory castables, low cement refractory castables, ultra-low cement refractory castables, cement-free refractory castables, steel fiber refractory castables, explosion-proof refractory castables, Anti-skinning refractory castables, phosphate refractory castables, alkali-resistant castables, heat insulation castables, in addition, there are new types of castables such as self-flowing refractory castables. 2. The application of refractory castables in glass-melting furnaces. Due to the requirements of the working environment of the glass melting furnace itself, the applied refractory castable should have the characteristics of good high-temperature resistance, strong resistance to glass liquid erosion, and low porosity. The refractory castables mainly used include fused silica castables, corundum castables, lightweight mullite castables, zircon ramming materials, etc. 3. Application of refractory castables in the metallurgical industry. (1) Refractory castables for ironmaking systems In the ironmaking system, there are many refractory castables for blast furnace tapping troughs, and ASC refractory castables are generally used. ASC castables are generally low-cement or ultra-low-cement castables, which are mainly...

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Types of Wear-resistant Refractory Materials for Circulating Fluidized Bed Boilers

The operating temperature of the circulating fluidized bed boiler is high, and the temperature in the furnace changes frequently, resulting in thermal shock. At the same time, there are many high-temperature solid particles in the furnace, which continuously erode the heating surface, so it is necessary to lay wear-resistant refractory materials for maintenance. Types and characteristics of wear-resistant refractory materials for circulating fluidized bed boilers: Wear-resistant refractory type Introduction of wear-resistant refractory materials for circulating fluidized bed boilers Wear-resistant refractory materials can be divided into fixed materials and non-fixed materials according to their delivery conditions and can be divided into wear-resistant refractory materials (including bricks, castables, plastics, and mortars); refractory materials (including bricks, castables, mortar); refractory insulation materials (including bricks, castables, and mortar). typesetting material (1) Wear-resistant refractory materials (dense refractory materials): silica-alumina bricks (silicon bricks, refractory clay bricks, high-alumina bricks), zirconium-silicon bricks, non-composite bricks (carbon bricks, silicon carbon bricks), magnesium-calcium-chrome bricks and Electrolytic magnesia product categories (magnesia bricks, chrome-magnesia bricks, chrome bricks, dolomite bricks). (2) Insulation materials: refractory insulation bricks, insulation bricks, insulation blocks, ceramic fibers. Unshaped material Unshaped materials include castables, plastering materials, plastics, repair materials, spray gun materials, castables, vibrating materials, plastering materials, etc., and can be...

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Causes of Refractory Brick Falling off During the Drying Process of New Cement Kiln

Rotary kiln lining brick is an important piece of equipment to ensure the continuity of cement clinker production. Therefore, if the rotary kiln is an important machine, then the refractory brick lining is the motor. However, when many cement factories build a new rotary kiln, the refractory bricks in the kiln will fall off, and they don’t know what to do. What is the reason? The main reason is that the refractory bricks are not locked during the masonry process. 1. Analysis of the causes of brick falling during the drying process of refractory bricks (1) Improper use of cement. During the masonry process, it is necessary to use refractory mortar to bond the refractory bricks built by the rotary kiln, and it is also necessary to use mortar to level the refractory bricks. When the mortar is applied unevenly, it is easy to cause the model ratio of the refractory bricks to be unbalanced, resulting in the brick surface tilting, and the size of the bricks being inconsistent. The use of mortar has a particularly prominent impact on winter construction. Due to the decrease in the ambient temperature, the fluidity of the refractory mortar becomes poor, and freezing occurs....

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Solve the Problems Existing in Refractory Materials of Cement Rotary Kiln

During the operation of the cement rotary kiln, faults such as egg accumulation, flying sand, snowman making, and ring formation often occur. These failures not only affect the operation of the kiln but also affect the service life of the lining refractory material. To solve these problems, it is necessary to clarify the formation mechanism of these faults and destroy the formation conditions of the faults, so as to achieve the purpose of high yield, high quality, and low consumption. Today we will talk about the ring formation problem of cement rotary kilns. The former and the latter are divided into three types. Among them, the most difficult to deal with is the rear ring. Use refractory materials to slow ring formation In order to slow down the formation of rings, in addition to controlling raw materials and fuels, improving the flammability of raw materials, improving combustion, adopting thin material quick-turn operations, and stabilizing thermal systems, refractory materials can also be used. The test results show that the sulfur-alkali ring can be relieved by using bricks containing SiC or ZrO2, the sulfur-alkali ring can be relieved by the use of magnesium aluminum spinel bricks and magnesia alumina spinel castables, and...

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Solve the Problem of the Back Ring in the Cement Rotary Kiln

During the operation of the cement rotary kiln, faults such as egg accumulation, flying sand, snowman making, and ring formation often occur. These failures not only affect the operation of the kiln but also affect the service life of the lining refractory material. To solve these problems, it is necessary to clarify the formation mechanism of these faults and destroy the formation conditions of the faults, so as to achieve the purpose of high yield, high quality, and low consumption. Today we will talk about the ring formation problem of cement rotary kilns. The former and the latter are divided into three types. Among them, the most difficult to deal with is the rear ring. Rear Ring Problem The latter is the ring formed at the junction of the launch zone and the transition zone. The kiln back ring has a close relationship with the low melting point material in the kiln. It is also closely related to coal ash. Therefore, the latter ring is also called the pulverized coal ring. When materials in the transition zone enter the firing zone, they will be blocked by the kiln skin. Some materials stay for a certain period of time before entering...

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Solve the Problem of the Front Ring in the Cement Rotary Kiln

During the operation of the cement rotary kiln, faults such as egg accumulation, flying sand, snowman making, and ring formation often occur. These failures not only affect the operation of the kiln but also affect the service life of the lining refractory material. To solve these problems, it is necessary to clarify the formation mechanism of these faults and destroy the formation conditions of the faults, so as to achieve the purpose of high yield, high quality, and low consumption. Today we will talk about the ring formation problem of cement rotary kilns. The former and the latter are divided into three types. Among them, the most difficult to deal with is the rear ring. front ring problem The front ring is the ring connected to the cooling zone. When the material in the kiln enters the cooling zone from the firing zone, a part of the clinker that cannot be completely solidified on the kiln skin is formed on the surface. If it is not dealt with in time, it will accumulate and develop into an anterior ring. Henan Xinhongji Refractory Material Co., Ltd. summed up some experience of ring forming before processing ①When the current ring-forming position is...

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Solve the Problem of Sulfur-alkali Circulation in Cement Rotary Kiln

During the operation of the cement rotary kiln, faults such as egg accumulation, flying sand, snowman making, and ring formation often occur. These failures not only affect the operation of the kiln but also affect the service life of the lining refractory material. To solve these problems, it is necessary to clarify the formation mechanism of these faults and destroy the formation conditions of the faults, so as to achieve the purpose of high yield, high quality, and low consumption. Today we will talk about the ring formation problem of cement rotary kilns. The former and the latter are divided into three types. Among them, the most difficult to deal with is the rear ring. The problem with the sulfur-alkali cycle The sulfur-alkaline ring is a circle formed in the decomposition zone, which not only contains a large number of volatile components but also contains some characteristic minerals, such as 2c2s?CaSO4 and 2c2s?CaCO3. The formation mechanism of the sulfur-alkali ring is that a large number of volatile components act as binders. When C2S is stabilized or transformed into 2c2s?CaSO4 and 2c2s?CaCO3, the conversion of β-C2S-γ-C2S will not occur, and there will be no pulverization accompanying the conversion, and there is...

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Construction Methods and Requirements of Refractory Bricks for Fluidized Furnaces

Fluidized furnace lining refractories are mainly composed of refractory bricks and monolithic refractories. The following are the construction methods of refractory bricks. The lining masonry of a fluidized furnace is mainly divided into two parts: wall and vault. 1. Refractory brick wall masonry. Before construction, use a theodolite to measure the center line of the furnace, re-measure the foundation elevation, and mark the height of the first layer of bricks on the furnace shell every 5 meters. Draw a layered line along the vertical direction as a reference for the furnace bottom and furnace wall masonry. All brickwork joints must be filled with adhesive (including joints between brickwork and steel shell and between brick layers), so all brickwork joints are filled without gaps and holes. And regularly check whether the position of the masonry after masonry is accurate. For multi-layer brick masonry floors, the total thickness of the brick walls must be checked. The required thickness of mortar joints should be 2mm as far as possible (tolerance ±1mm). A waterproof layer is set between the calcium silicate board, the high alumina insulating bricks, and the insulation refractory brick to prevent the absorption of solidified water. A plastered subfloor can be...

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