The chemical composition of fireproof material is to point to the compound that makes fireproof material, also weigh chemical composition. Generally speaking, different fireproof material has different chemical part, and fireproof material presses avery kind of how much can the content of each composition divide into two parts again, one part is the main part that takes absolute majority, another part is to occupy a few foreign matter composition. In fireproof material, the composition that normally need determines has Al2O3, Si02, Fe203, CaO, MgO, Ti02, Na20, K2O to wait, fireproof to containing carbon material and carborundum are fireproof for material, carbon and carborundum also are important chemical composition.
What makes direct tie?
By be able to bear or endure the way of a kind of union that photograph of brilliant of a house where a fire started contacts a generation directly says for direct union, it is united in wedlock unlike chemistry already, also do not belong to union of pottery and porcelain. The product of direct union has strength of higher high temperature machinery commonly, the sex that fight broken bits and bulk stability are better also. In if direct union is magnesian chromic brick, square magnesian stone and square magnesian stone, square magnesian Shi Yumei is chromic the direct union between pointed spar.
What is chemical union?
Chemical union is the union that in pointing to refractory products, forms by chemical bond. Add a few union substance namely, falling under the condition of firing temperature, happen a series of the union that chemistry makes make goods sclerotic instead and forms. This kind of union exists generally in burning refractory products. Its formation and property basically depend on the property of place chemically bond. Some can make below normal temperature some of goods sclerosis; needs to heat to make to the ability after proper temperature goods gains particular strength. With the refractory products of chemical union, classics high temperature is used, some can form union of pottery and porcelain.
What is union of pottery and porcelain?
Advocate the silicate noncrystalline of low melting point of brilliant alternate with and the union that crystalloid binds together and form call pottery and porcelain union. If common magnesia brick is medium,the between union of a magnesian stone is the union of pottery and porcelain that forms by the low frit content such as magnesian calcic olivine or magnesian rose picrite. The agglomeration of this kind of goods participates in next finishing in fluid photograph. The property of constituent of union of pottery and porcelain reachs his to be in advocate the distributinging condition of brilliant alternate with, great to the property influence of refractory products.
Common fireproof material has firebrick, tall aluminium brick, pouring brick of brick of brick of brick of makings, tall aluminous firebrick, heat preservation, tall aluminous wear-resisting, argillaceous heat preservation, light qualitative tall aluminium, its are fireproof common union means has in the process that material is using the following 6 in:
(１ ) to hydrate is united in wedlock -- have the aid of produces to hydrate to reaction makes to hydrate product and produce tie at the bond below normal temperature and water.
(2) chemical union -- have the aid of at bond and stiffening agent, or chemical reaction produces below normal temperature between bond and fireproof material, or chemical reaction happens to make the compound that has bond effect when heating and generation is united in wedlock.
(3) aggregate union -- have the aid of at adding activator or cross-linking agent, consociate agent happens to condensation polymerization forms network shape structure and generate combinative strength.
(4) pottery and porcelain is united in wedlock -- the department shows microtherm agglomeration is united in wedlock, coming loose namely shape joins the auxiliary that can drop firing temperature or metallic powder in fireproof material, with dropping fluid photograph occurrence temperature greatly, one fluid originallies to react below stimulative low temperature and produce microtherm agglomeration tie.
(5) adhesion union -- be at one of action of following a few kinds of physics generation union of have the aid of.
Action of １ , physisorption: The interaction force between support member -- Fan Dehua force and produce tie;
2, diffuse action: Below the action that heats up motion in corporeal element, binder and be happened to diffuse each other by the element of felt content action, form diffusion layer, form firm union thereby;
3, electrostatic action: Binder and be being existed by the interface of felt content electric double layer, by the electrostatic gravitation action of electric double layer generation is united in wedlock.
(6) agglomeration is united in wedlock -- support joins flocculating agent to make small particle (colloid particle) produce agglomeration and produce tie.
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