[Supply] high alumina brick high alumina brick factory | alumina brick prices | alumina brick offer - Longtime

[Supply] high alumina brick high alumina brick factory | alumina brick prices | alumina brick offer - Longtime alumina bricks which sintering temperature: below 200 ℃, to exclude residual moisture of the body blank; 200-1250 ℃, combined with clay The decomposition of kaolinite dehydrated to form mullite and free SiO2; above 1250 ℃, clinker α-Al2O3 and SiO2 combine to generate free secondary mullite, accompanied by volume expansion. (Note: to generate different phase density) we understand the sintering temperature alumina bricks, high alumina bricks come to look at the performance benefits are there? 1, refractoriness. Alumina brick products are aluminum silicate refractories products in the advanced species, with its refractoriness Al2O3, increased content increases, generally not less than 1750-1790 ℃. Such as Al2O3 content of more than 95% of corundum brick, refractoriness up to 1900-2000 ℃. 2, load softening temperature. Load softening temperature alumina brick products with silica and alkali metal oxide content increases and decreases, but higher than clay products, about 1420-1530 ℃. Al2O3. Content greater than 95% of corundum brick, its load softening temperature up to 1600 ℃. 3, slag resistance. Because of high alumina brick products was neutral aluminum oxide and high levels, so these materials, products for pH slag erosion can have a strong resistance. 4, thermal shock resistance. Alumina brick products, corundum and mullite two crystals coexist, since the coefficient of thermal expansion than the mullite corundum large thermal expansion coefficient, temperature change when refractory bricks, due to differences in expansion cause stress concentration. Therefore, high alumina brick products than clay products, thermal shock resistance is poor, generally only 3-5 times the number of water-cooled. 5, reheating linear change. If the firing temperature sufficiently high alumina brick products, firing sufficient time, the volume of the stable, heavy firing line change is small; on the contrary, is generated as residual shrinkage of clay brick products, because also occur due to recrystallization. Longtime Zouping Refractories Co. (www.zpltnhcl.com) is a construction, building materials company, is approved by the relevant state registration of enterprises. Main refractories, refractory bricks, the company is located in the town pond China Zouping County resident. Longtime Refractories Co. Zouping spirit of "customer first, honesty first" principle, with the number of enterprises established long-term cooperative relationship. Warmly welcome friends to visit, study, business negotiations.