Optimum Toughness Of The Grains Brown Fused Alumina,Suite To Abrasives And Refractorie

Brown aluminium oxide
BFA
Brown corundum

Short Description

Brown Fused Alumina is produced by the smelting of Calcined Bauxite in an electric arc furnace at temperatures greater than 2000°C. A slow solidification process follows the fusion, to yield blocky crystals. The melting help in removing residual sulphur and carbon , Strict control over Titania levels during the fusion process ensures optimum toughness of the grains.

Then the cooled crude is further crushed, cleaned of magnetic impurities in high intensity magnetic separators and classified into narrow size fractions to suit the end use. Dedicated lines produce products for different applications.

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Application

Brown Fused Alumina is a tough, sharp abrasives which is highly suitable for grinding metals of high tensile strength. Its thermal properties make it an excellent material for use in the manufacture of refractory products. This material is also used in other applications like blasting and surface hardening.

Grade	Specification	Chemical Composition(F46)
Grade	Specification	Al₂O₃	SiO₂	Fe₂O₃	TiO₂	CaO
Brick Grade *	0-1,1-3,3-5mm-8+16,-16+30,-30+60mesh,Fines	≥95.2	≤1.0	≤0.3	≤3.0	≤0.4
Castable Grade	0-1,1-3,3-5mm-8+16,-16+30,-30+60mesh,Fines	≥95	≤1.5	≤0.3	≤3.0	≤0.4
Vitrified Grade	F12-F220	≥95.5	≤1.0	≤0.3	2.2-3.0	≤0.4
Resin &Blasting Grade	F12-F220	≥95	≤1.5	≤0.3	≤3.0	≤0.4
Micro Grade	P240-P1200	≥92-95	≤1.0-1.8	≤0.3-0.5	≤2.2-4.5	-
Micro Grade	F240-F1000	≥88-95	≤1.0-2.5	≤0.3-0.5	≤2.2-6.5	-
Melting point		2050℃
Refractoriness		1980℃
True density		3.90ming/cm³
Mohs hardness		9.00min

Items	Size	Chemical Composition (%)
Items	Size	Al₂O₃	TiO₂	CaO	SiO₂	Fe₂O₃
A和A-P₁	F4～F80 P12～P80	95.00～97.50	1.70～3.40	≤0.42	≤1.00	≤0.30
	F90～F150 P100～P150	94.50～97.00	1.70～3.40	≤0.42	≤1.00	≤0.30
	F180～F220 P180～P220	94.00～97.00	1.70～3.60	≤0.45	≤1.00	≤0.30
	F230～F800 (P240～P800）	≥93.50	1.70～3.80	≤0.45	≤1.20	≤0.30
	F1000～F1200 (P1000～P1200）	≥93.00	≤4.00	≤0.50	≤1.40	≤0.30
	P1500～P2500	≥92.50	≤4.20	≤0.55	≤1.60	≤0.30
A-B和A-P₂	F4～F80 P12～P80	≥94.00	1.50～3.80	≤0.45	≤1.20	≤0.30
	F90～F220 P100～P220	≥93.00	1.50～4.00	≤0.50	≤1.40	-
	F230～F800 (P240～P800)	≥92.50	≤4.20	≤0.60	≤1.60	-
	F1000～F1200 (P1000～P1200）	≥92.00	≤4.20	≤0.60	≤1.80	-
	P1500～P2500	≥92.00	≤4.50	≤0.60	≤2.00	-
A-S	16～220	≥93.00	-	-	-	-

Brick/ Vitrified Grade BFA : Is produced using special grade Bauxite in controlled fusion parameters. This grade is suitable for Bricks/ Vitrified products preventing Cracks/ Fissures, Holes and Black spots in the end product.