複合耐火物キャスタブルとは?

Composite refractory castable is a monolithic refractory material made by mixing a variety of raw materials in different proportions of aggregate and fine powder and then adding different proportions of binders.

Why is composite refractory castable needed?

As the service life of multiple furnace types and multiple furnace lining components increases, a variety of raw materials are needed to make composite refractory castables to resist the erosion of various furnace lining atmospheres. Basically, より多い 70% of the castables currently used in the market are composite refractory castables.

Clay castables and high-aluminum castables are castables with a single component, while 低セメントキャスタブル also have a variety of composite component castables. 例えば, adding silicon carbide becomes silicon carbide high-aluminum low-cement castables. , and adding mullite is to add a certain proportion of mullite to the bauxite raw material, or add a certain proportion of corundum. In fact, corundum is also bauxite, but those with an aluminum content of more than 90% are called corundum materials.

加えて, according to different needs, olivine, chromium, アンダルサイ​​ト, kyanite, sillimanite, cordierite, 等. are added as composite refractory castables. For use in some special parts, a variety of ingredients can also be added. The three-layer compounding of raw stone, 炭化ケイ素, and corundum is also a composite castable to increase the service life of special parts. Some also add green silicon carbide for better performance.

There are more castables that add silicon carbide composites because the blast furnace trench and some wear-resistant parts use multiple composites. したがって, in the current use of refractory materials, there are more and more multiple composite materials. Especially under the major task of environmental protection, the lining atmosphere of the garbage incinerator is multi-complex, and the corrosion and wear conditions are intertwined, which cannot be determined by a certain corrosion component. したがって, triple or even quadruple composite refractory castables have appeared. Lining to resist various erosions of the lining.

しかし, in general, the proportion of chromium added cannot be high, because chromium pollution also introduces unnecessary damage. したがって, in general, the composite ingredients are determined based on different furnace types, different temperatures, and different degrees of corrosion. To increase the service life of the refractory castable lining.