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We all know that refractory castable material is used to build high-temperature kiln linings, but many people want to know how to produce refractory castable material. Today, the editor will take you to understand the production process of refractory castable materials. 1. Crushing and crushing: A jaw crusher is used for the coarse crushing of raw materials, mainly for the coarse crushing of large pieces of materials. Medium and fine crushing equipment for refractory raw materials includes cone crushers, drum crushers, and dry crushers. 2. Screening and fine grinding: Screen the crushed materials according to particle size. The equipment includes a fixed inclined screen and an electromagnetic vibrating screen. Manufacture of refractory powders, including ball mills, tube mills, and vibration mills. 3. Pre-mixing: Pre-mix admixtures, admixtures, binders, fine powders, and other powders. The equipment is a double-spiral conical mixer, etc. 4. Ingredients scale: Electronic weighing is generally used to ensure the accuracy of weighing. 5. Mixing: Use a forced mixer to stir the material. The mixed material can be input into the packaging machine and then packaged, or it can be packaged into bags directly from the outlet of the mixer. 6. Distribution and sealing: Use dispensing equipment for dispensing,...
The composition of refractory bricks is mainly mixed powdery particles composed of a variety of aggregates or aggregates and one or more binders. When used, they must be mixed evenly with one or more liquids and have a strong flow. sex. Different refractory bricks have different raw materials, such as silicon alumina, clay, etc.: According to the different compositions of refractory bricks, they can be divided into five categories, namely: silicon-alumina series refractory bricks, alkaline series refractory bricks, carbon-containing refractory bricks, zirconium-containing refractory bricks, and insulating refractory bricks. Any stove is not built with only one kind of refractory bricks but requires the use of different refractory bricks in conjunction with each other. The following is a detailed introduction to the components of these five categories of refractory bricks. 1. Silicon-aluminum refractory bricks, it is reported, are based on the AL2O3-SiO2 binary system phase diagram as the basic theory, and mainly include the following types. Silica brick refers to refractory bricks containing more than 93% SiO2 and is the main variety of acid refractory bricks. It is mainly used for building coke ovens and is also used in the vaults and other load-bearing parts of thermal kilns of various glass,...
Refractory castables have strong fluidity and plasticity. It is one of the most widely produced and used amorphous refractory materials. Mainly used to build various heating furnace linings and other overall structures. Refractory castables have high room temperature strength and are used to make prefabricated components and install them on-site in rotary kilns. So what preparations should we make before construction? 1. Determine the shape and structure of the castable facility and clean it. 2. Process channel settings. 3. Construction machinery, vibration tools, etc. must be in good condition and have complete parts. 4. Anchor type, proportion, location, and cold welding quality. Metal anchors must be expansion compensated. 5. Preventive measures should be taken to prevent dehydration (glue) of castables in the surrounding refractory brick insulation layer. 6. The packaging and delivery date of the castable, and conduct a pre-test to check whether it is invalid. 7. The quality of construction water must reach drinking water quality. 8. Implementation of construction technical inspection. 9. Pouring procedure. Through the above inspection, to facilitate our subsequent construction, if any parts are unqualified, they will be replaced in time to avoid problems during the construction process.
The blast furnace is currently the main smelting equipment, which has the characteristics of simple public welfare and high production capacity. The refractory brick furnace lined in a blast furnace to occupy an important position. However, during the production process, due to the role of various functions, the inner lining of the fire-resistant brick of the furnace wall was gradually eroded. Therefore, to extend the service life of the high-temperature furnace, it is necessary to reasonably choose the refractory brick furnace. The selection method for the refractory bricks of each part is as follows: 1. The stove and throat are mainly impacted and worn by the furnace material. Generally, steel bricks or water-cooled steel bricks are used. 2. When using a thin-walled structure in modern large blast furnaces, chemical erosion, and abrasion resistance should be selected. Among them, high-density clay bricks are most suitable to replace bricks. 3. Its destruction mechanism is mainly the heat shake peeling, high-temperature gas erosion, the precipitation of alkaline metals, zinc, and carbon, and the chemical erosion of the initial residue. The brick lining should be used to resist the refractory material with heat shock, residual slag erosion, and anti-erosion. The practice has proved that...
Fire-resistant plastic is made of 70-80% granular and powdery materials, plus 10-25% plastic clay and other binders and an appropriate amount of plasticizer. Through adjustment, it can maintain high plasticity within a corresponding period, but the fire-resistant plastic The construction and maintenance of refractory plastics must be carried out according to certain standards. Today I will give you a brief introduction to the construction, maintenance, and baking requirements of refractory plastics. Fire-resistant plastic construction 1. Mixing: The plastic must be mixed with a forced mixer with a speed of not less than 26 rpm. Dry mix for 2-3 minutes, and then add clean water. The amount of water should be added according to the water-adding range requirements of different brands. Ensure that it is easy to mix. Under the best construction performance, the less water is used, the better. After adding water, stir for no less than 5 minutes until uniform. The mixed materials should be used up within half an hour. If there is any material that has initially been set and dried, it should not be used again. used, should be scrapped. 2. Pouring and vibration molding: The material should be vibrated while the cloth is being spread,...
The insulation layer of an alumina rotary kiln is a layer of refractory fiber felt on the kiln shell, and then diatomaceous earth, floating bead bricks, or lightweight clay bricks. Some now use lightweight refractory castables. The working lining of the prezone is constructed with clay bricks, and the high-temperature calcined zone is constructed with high alumina bricks or phosphate-bonded unfired high alumina bricks. At present, unshaped refractory materials have been widely used in the aluminum industry, such as low-calcium aluminate refractory castables for the calcining zone, steel fiber-reinforced wear-resistant castables for the kiln mouth, kiln hood, kiln tail, and other parts. The flash furnace installs heat-resistant steel anchors or ceramic anchors on the furnace shell, then lays a layer of 20mm thick refractory fiber felt, and finally pours 200-300mm thick refractory castables. The working lining of the reverberatory furnace of the aluminum smelting furnace in contact with the aluminum liquid is generally built with high-aluminum bricks with an aluminum content of 80 to 85%; when smelting high-purity metallic aluminum, mullite bricks or corundum bricks are used. The combination of silicon nitride and silicon nitride bricks is used for the erosion and wear parts of the hearth slope such as...
Recently, many customers have inquired about refractory materials for waste incinerators. In response to the selection problems faced by customers, Xinhongji Refractory has compiled a list of refractory materials for waste incinerators for reference only. Different types of incinerators vary based on type, temperature, and location. Please read carefully. Commonly used incinerators include intermittent incinerators, grate incinerators, calcium oxide incineration systems, fluidized bed incinerators, rotary incinerators, etc. Refractory materials for waste incinerators have the following characteristics: Good volume stability; good high-temperature strength and wear resistance; good acid resistance; good seismic stability; good corrosion resistance (CO, Cl2, SO2, HCl, alkali metal vapor, etc.); good processability (amorphous); good heat resistance and insulation. Use different incinerators, different components, and different temperatures. The following selection suggestions are for reference only: The operating temperature of the top, side walls, and burner of the combustion chamber is 1000-1400℃. High alumina bricks, clay bricks with a fire-resistance rating of 1750~1790℃ and plastic bricks with a fire-resistance rating of 1750~1790℃ can be selected; The operating temperature of the upper, middle, and lower parts of the grate side is 1000~1200℃. Silicon carbide bricks, clay bricks, and wear-resistant castables with a fire resistance of 1710-1750℃ can be used; The operating...
In their daily lives, people often see fires breaking out in some places, causing huge property losses and even casualties. For this reason, more and more companies are using refractory materials made of refractory castables in construction. So, fire-resistant How does the castable perform? What are the properties of castables? 1. Acid-resistant castable is a new anti-corrosion material composed of multiple components, including potassium silicate as the binder, inorganic molecular materials as the curing agent, and silicate as the acid-resistant filler. 2. Acid-resistant castables have high mechanical strength and excellent bonding properties, especially the bonding force between rapid masonry granite materials, acid-resistant ceramic tiles, porcelain plates, and cement. 3. Acid-resistant castables have stable performance in various concentrations of organic acids and inorganic acids, especially in dilute acids, industrial water, and neutral aqueous solutions, no crystalline salts are generated, and they have substantial impermeability. 4. Good heat resistance. In titanium rotary kiln lining, the service temperature can reach 950℃-1000℃. 5. The acid-resistant castable uses a non-toxic curing agent, which is non-toxic to construction workers and construction workers. It can be used for anti-corrosion projects of food, medicine, and other equipment, and has been identified by the medical and health department. 6....
Castables are mainly divided into castables for ordinary construction and refractory castables for high-temperature kilns. It is an amorphous material. Ordinary castables for building buildings usually refer to materials poured into the construction of building walls. They are usually not It has refractory properties, and refractory castable is a type of castable used in the construction of high-temperature kiln linings. There are many types of castables. Today, the editor will take you to understand what refractory castables are. Refractory castables are usually composed of refractory aggregates, powders, and binders, but sometimes to improve the fire resistance of refractory castables, we also add various refractory raw materials, such as stainless steel fibers, inorganic fibers, corundum, etc. Special refractory materials are used to improve the refractory properties of the castables to ensure that they can work normally during the operation of high-temperature furnaces. There are many types of refractory castables. Generally, there are two main types during the use of high-temperature kilns. One is lightweight insulation castables, and the other is heavy refractory castables. Lightweight insulation castables are divided into clay-based and high-aluminum based on raw materials, such as lightweight acid-resistant castables, lightweight alkali-resistant castables, etc. There are many types. We generally...
Hook castables refer to the castables used in tap hooks in blast furnace tapping plants. Blast furnaces are mainstream iron-making equipment. They are eroded by molten iron for a long time during operation, so they are used during construction. Refractory materials of various materials, such as refractory castables, refractory bricks, etc. Iron Hook Castable The blast furnace tap hook is a circulation channel for molten iron and requires high-temperature-resistant refractory castables. The blast furnace tap hook castable is a castable specially designed for the tap hook. It is generally an ultra-low cement refractory castable. Castable refractory castables composed of corundum or high-alumina clinker, silicon carbide, carbon, binders, and admixtures are mainly used for the lining of blast furnace tap hooks. Properties of Hook Castables To adapt to high-temperature resistance, iron hook castables have very good characteristics, such as high strength, thermal shock resistance, etc. The following editor will introduce several types in detail: 1. The first properties of iron hook castables are high-temperature resistance and high strength. The strength is high enough to resist the erosion of molten iron, that is, it has strong resistance to the erosion and erosion of molten iron and slag; 2. It has good thermal...
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