Sintered And Fused Mullite For Refractory Production

Sintered Mullite And Fused Mullite Are Primarily Used For The Production Of Refractories And The Casting Of Steel And Titanium Alloys

Sintered Mullite is choosed the natural high-quality bauxite, through multi-level homogenization, calcined at over 1750℃. It is characterized by high bulk density, stable quality stability thermal shock resistance, low index of high temperature creep and good chemical corrosion resistance performance and so on. Extremely rare in its natural form, mullite is artificially produced for industry by melting or firing various alumino-silicates. The outstanding thermo-mechanical properties and stability of the resulting synthetic mullite make it a key component in many refractory and foundry applications.

Items	Chemical composition (Mass fraction)/%				Bulk density g/cm³	Apparent porosity %	Refractoriness ℃	3Al2O3.2SiO2 Phase (Mass fraction)/%
Items	Al₂O₃	TiO₂	Fe₂O₃	Na₂O+K₂O
SM75	73~77	≤0.5	≤0.5	≤0.2	≥2.90	≤3	180	≥90
SM70-1	69~73	≤0.5	≤0.5	≤0.2	≥2.85	≤3	180	≥90
SM70-2	67~72	≤3.5	≤1.5	≤0.4	≥2.75	≤5	180	≥85
SM60-1	57~62	≤0.5	≤0.5	≤0.5	≥2.65	≤5	180	≥80
SM60-2	57~62	≤3.0	≤1.5	≤1.5	≥2.65	≤5	180	≥75

S-Sintered; M-Mullite; -1: level 1 Samples: SM70-1, Sintered Mullite, Al₂O₃:70%; Grade 1 product Although mullite exists as a natural mineral, occurrences in nature are extremely rare. The industry relies on synthetic mullites which are achieved by melting or ‘calcining’ various alumino-silicates such as kaolin, clays, rarely andalusite or fine silica and alumina to high temperatures. One of the best natural sources of mullite is kaolin (as kaolinic clays). It is ideal for the production of refractories such as fired or unfired bricks, castables and plastic mixes. Sintered mullite and fused mullite are primarily used for the production of refractories and the casting of steel and titanium alloys.• Good creep resistance • Low thermal expansion • Low thermal conductivity • Good chemical stability • Excellent thermo-mechanical stability • Excellent thermal shock resistance • Low porosity • Comparatively lightweight • Oxidation resistance

Sintered Mullite And Fused Mullite Are Primarily Used For The Production Of Refractories And The Casting Of Steel And Titanium Alloys

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