What is Brown fused alumina/Brown Alumina Oxide

Brown fused alumina is made from Calcined Bauxite. It is a hard and tough material, used in manufacturing of grinding wheels (both vitrified and resin bonded) and coated products.

These grains are also used for shot blasting and as polishing media.

Refractory grade BFA is used as a raw material in the manufacture of high alumina refractory..

PPHYSICAL PROPERTIES

Specific Weight	3.96 g/ cm³
Mohs Hardness	9.0
Crystal form	α-Al₂O₃
Melting Point	2250℃

1.Used for refractory,casting,foundry and Painting etc

TYPICAL CHEMICAL ANALISIS [%]

Size	Al₂O₃	Fe₂O₃	SiO₂	TiO₂	CaO	MgO
0-1mm 1-3mm 3-5mm 5-8mm	≥95.0	≤0.30	≤1.0	1.7-3.4	≤0.42	/
200F 325F	≥92.5	≤1.0	≤3.0	3.0-5.0	≤0.60	/

2,Used for abrasives,blasting,grinding,ceramic,rust removal,surface treatment,floor coating,abrasion resistant layer etc

TECHEMICAL ANALISIS [%]

Al₂O₃	Fe₂O₃	SiO₂	MgO	CaO	TiO₂	Na₂O	K₂O	LOI
≥95.0	≤0.30	≤1.0	/	0.42	1.7-3.4	/	/	< 0.09

PARTICLE SIZE DISTRIBUTION

F8	+4000um	+2800um	≤20%	+2360um	≥45%	+2360+2000um	≥70%	-1700um	≤3%
F10	+3350um	+2360um	≤20%	+2000um	≥45%	+2000+1700um	≥70%	-1400um	≤3%
F12	+2800um	+2000um	≤20%	+1700um	≥45%	+1700+1400um	≥70%	-1180um	≤3%
F14	+2360um	+1700um	≤20%	+1400um	≥45%	+1400+1180um	≥70%	-1000um	≤3%
F16	+2000um	+1400um	≤20%	+1180um	≥45%	+1180+1000um	≥70%	-850um	≤3%
F20	+1700um	+1180um	≤20%	+1000um	≥45%	+1000+850um	≥70%	-710um	≤3%
F22	+1400um	+1000um	≤20%	+850um	≥45%	+850+710um	≥70%	-600um	≤3%
F24	+1180um	+850um	≤25%	+710um	≥45%	+710+600um	≥65%	-500um	≤3%
F30	+1000um	+710um	≤25%	+600um	≥45%	+600+500um	≥65%	-425um	≤3%
F36	+850um	+600um	≤25%	+500um	≥45%	+500+425um	≥65%	-355um	≤3%
F46	+600um	+425um	≤30%	+355um	≥40%	355+300um	≥65%	-250um	≤3%
F54	+500um	+355um	≤30%	+300um	≥40%	+300+250um	≥65%	-212um	≤3%
F60	+425um	+300um	≤30%	+250um	≥40%	250+212um	≥65%	-180um	≤3%
F70	+355um	+250um	≤25%	+212um	≥40%	+212+180um	≥65%	-150um	≤3%
F80	+300um	+212um	≤25%	+180um	≥40%	+180+150um	≥65%	-125um	≤3%
F90	+250um	+180um	≤20%	+150um	≥40%	+150+125um	≥65%	-106um	≤3%
F100	+212um	+150um	≤20%	+125um	≥40%	+125+106um	≥65%	-75um	≤3%
F120	+180um	+125um	≤20%	≥40%	≥40%	+106+90um	≥65%	-63um	≤3%
F150	+150um	+106um	≤15%	+75um	≥40%	+75+63um	≥65%	-45um	≤3%
F180	+125um	+90um	≤15%	+75um	*	+75+63um	≥40%	-53um	*
F220	+106um	+75um	≤15%	+63um	*	+63+53um	≥40%	-45um	*

3.Used for Grinding,polishing,lapping,whetstone,polishing pads,ceramic membrance etc

TYPICAL CHEMICAL ANALISIS [%]

Al₂O₃	Fe₂O₃	SiO₂	FeO	MgO	CaO	TiO₂	Na₂O	K₂O	LOI
92.5-96.0	≤0.75	≤2.0	/	≤0.50	/	1.7-3.4	/	/	< 0.09

PARTICLE SIZE DISTRIBUTION

CHAPTER Ⅰ（JIS STANDARD）

Size	DO(um)	D3(um)	D50(um)	D94(um)
#240	≤127	≤103	57.0±3.0	≥40
#280	≤112	≤87	48.0±3.0	≥33
#320	≤98	≤74	40.0±2.5	≥27
#360	≤86	≤66	35.0±2.0	≥23
#400	≤75	≤58	30.0±2.0	≥20
#500	≤63	≤50	25.0±2.0	≥16
#600	≤53	≤41	20.0±1.5	≥13
#700	≤45	≤37	17.0±1.5	≥11
#800	≤38	≤31	14.0±1.0	≥9.0
#1000	≤32	≤27	11.5±1.0	≥7.0
#1200	≤27	≤23	9.5±0.8	≥5.5
#1500	≤23	≤20	8.0±0.6	≥4.5
#2000	≤19	≤17	6.7±0.6	≥4.0

CHAPTER Ⅱ（FEPA STANDARD）

Size	D3(um)	D50(um)	D94（um)
F230	＜82	53.0±3.0	>34
F240	＜70	44.5±2.0	>28
F280	＜59	36.5±1.5	>22
F320	＜49	29.2±1.5	>16.5
F360	＜40	22.8±1.5	>12
F400	＜32	17.3±1.0	>8
F500	＜25	12.8±1.0	>5
F600	＜19	9.3±1.0	>3
F800	＜14	6.5±1.0	>2