The content that corundum brick is alumina is more than the 90 ％ , fireproof data products that gives priority to brilliant photograph with corundum. Of corundum brick fireproof degree also can differ according to corundum goods. What Zhengzhou flourish Cheng Naicai introduces corundum brick in detail for everybody is fireproof degree.
Of corundum brick fireproof degree say to be able to bear or endure again fusibility. High temperature of token object resistance and infusible function index. Fireproof degree of physics that is not material is invariable, however index of a technology, its discretion is comprised by the chemistry of stock, spend dispersedly, what fluid photograph amid occupies scale and fluid photograph viscosity to wait for a decision. Decision material is fireproof the chemical and mineral composition that spent main factor is material reachs his to distributing circumstance, what all sorts of foreign matter composition have the foreign matter composition of strong flux action to be able to reduce material badly especially is fireproof degree.
Of corundum brick fireproof spend determine the method is: Become experiment stock the truncation triangle awl that becomes set dimension, it is certain to be in warm up when heating below speed, as a result of the weight of itself bend gradually, the temperature when trying awl to bend top and chassis contact experiments namely of stock fireproof degree.
The intensity of normal temperature compression of corundum brick (can amount to 340MPa) taller, loading bate begins temperature (be more than 1700 ℃ ) , chemical stability is good, wait to all have stronger counteractive capacity to acidity or basic slag, metal and vitreous fluid. Thermal shock stability organizes a structure to concern with its, of compact product be able to bear or endure aggressivity can be good, but thermal shock stability is poorer.
Normally cent is corundum brick agglomeration corundum brick and brick of electric frit corundum two kinds. Can use agglomeration alumina and electric frit corundum to make respectively former or Al2O3/SiO2 compares tall aluminous grog and agglomeration alumina to cooperate, use agglomeration legal system to become. The agent makes usable also phosphoric acid or other cohere do not burn corundum brick. The finery outside basically be being used at furnace of puddling blast furnace and blast furnace hot-blast stove, steel-making, slip water implement, vitreous frit kiln and petro-chemical industry furnace.
Corundum is fireproof material is stable in vacuum and inert gase medium. Corundum is fireproof material evaporates in true aerial speed, with the corundum brick that electric frit corundum gives priority to, in 1700 ～ be in when 1900 ℃ ～ of 2.29 × 10-7 fluctuates between S) of · of 5.75 × 10-7g/(cm2, ～ of 2.09 × L0-7 is in helium gas medium S) of · of 4.37 × 10-7g/(cm2.
Major of limited company of Zhengzhou flourish Cheng Naicai produces a sale fireproof stuff is old, we have seasoned technical group and excelsior manufacturing group, offer technical support and kiln furnace to build for the client build wait for a service, if you have demand to corundum brick, the welcome calls limited company of flourish Cheng Naicai, flourish Cheng Naicai, beside you be able to bear or endure material expert!
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