Corundum casting material
Specification: 25kg/bag
Fused alumina casting material is made by melting alumina or high-purity alumina powder in an electric arc furnace refining the alumina composition, and producing a variety of products according to the content of alumina and different processes. Component of fused alumina casting Fused alumina is a crystalline mineral of alumina. Fused alumina is a refractory material with a hardness second only to the diamond stone. The structure consists of three square crystal systems and six square bottom lattices. The crystal is barrel-shaped and short columnar, and a few have rough stripes on the plates double cones. The aggregate is a dense granular mass with many variants. Fused alumina is relatively stable. Its chemical properties are stable and it is resistant to and alkali corrosion. The main characteristics are high strength, good volume stability, excellent corrosion resistance, and it is not affected by reducing gases such as H2 andCo Scope of application It is generally used for coal nozzles in power plants, boiler linings, burners, furnace tops, slide rails of heating furnaces, cement rotary kilns, melting furnaces for non-ferrous metals, and the iron and steel industry, etc. The specifications of fused alumina casting material are as follows: 1. Ordinary fused alumina casting material is prepared by adding refractory powder, pure calciumuminate cement binder, silica micro powder and admixture to high alumina clay or electric fused brown fused alumina as aggregate; 2. Fusedina mullite casting material is a refractory casting material that can be cast and constructed by using mullite mature material as the main raw material and fusedina fine powder as the matrix, and adding additives, admixtures and other auxiliary materials; 3. Electric melting pure steel fused alumina casting material usesAL203 with a content of more than 90% as the main crystal phase of refractory products, and is compounded with appropriate amount of dispers, accelerator, and other admixtures according to a strict formula.
Project
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Corundum Mullite | Sapphire | Fused pure corundum | |
Al2O3/% | ≥75 | ≥85 | ≥90 | |
Volume density g/cm³ | 2.7 | 2.8 | 2.9 | |
Use temperature/℃ | ≥1450 | ≥1500 | ≥1550 | |
Heating wire variation rate/% | ±0.5 | ±0.5 | ±0.5 | |
Pressure resistance/MPa | ≥70 | ≥90 | ≥110 | |
Construction water addition/% | 6-8 | 5-6 | 5-6 | |
Construction method | Shuttering Vibration | Shuttering Vibration | Shuttering Vibration | |
*Can be negotiated and customized according to the customer's indicators. | ||||
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