Chemical & physical properties
crystal form alpha alumina trigonal system
chemical nature amphoteric
reaction with acids subject to mild attack by aqua andor hydrofluoric acid
reaction with alkalis very slight with strong hot solution only
oxidation-reduction effects none
true density(gcm3) 3.97
hardness knoop(kgcm2) 2000-2200
mohs 9.0
color dark brown
color after firing light blue
melting point 2000 c
max. Usable temperature 1900 c
specific heat (calg c) 0.26 (20-29 c)
coefficient of thermal conductivity
(calcm2.sec.c) room temperature 900 c
0.047 0.013
electrical resistivity (wcm) 30 c 300 c 900 c 1600 c
1016 1013 105 104
coefficient of liner expansion (x10-6) 7-9(0-1600c)

chemical composition (% by weight)
grit item 10 90 100 180 220-220 230 400 500 -1200
al2o3 94.5 97.0 9305 min. 92.5 min. 91.0 min. 89.0 min.
Tio2 1.5 3.8 1.5 3.8 1.5 -3.8 4.0 max 4.0 max

magnetic matters contents (% by weight)
grit no. magnetic matters content
16#-30

Zinc Ingot Standards

Permitted total of 6 5 4 3 2 1 Nominal Zn Class Standard
elements in columns 16 Max Al% Max Cu% Max Sn% Max Fe% Max Cd% Max Pb% content (%) Reference



0.01 0.002 0.001 0.003 0.005 0.005 99.99 Z2 EN 1179

0.01 0.005 0.004 0.007 99.99 Special Zinc Metal JIS H2107

0.03 0.01 0.005 0.02 99.97 Ordinary Zinc Metal JIS H2107

0.05 0.01 0.002 0.001 0.02 0.01 0.03 99.95 Zn-3 ISO 752

0.4 0.02 0.1 0.3 99.6 Distilled zinc metal special JIS H2107




Price : LME + 60$ FOB Bandar Abbas Port.
Payment : 100% TT
Delivery : Within 1 week from the time of down payment.
Others : Can be discussed.

Specifications for special customers we can provide higher al2o3 percentage rotary 88 rotary 87 rotary 86.5 rotary 86 rotary 85
al2o3 88 87 86.5 86 85
fe2o3 1.8 1.8 1.8 2 2
sio2 5.5 6.5 7 7.5 8.5
tio2 3.8 4 4 4 4
bulk density 3.25 3.25 3.2 3.2 3.15.

Aluminum OxideCalcined Alumina Alumina Specifications
Parameters u.m. Value Analysis Method
Al2O3 % 99 Min By Difference
SiO2 % 0.012 ZSNP 03-02-01
Fe2O3 % 0.014 ZSNP 03-02-01
Na2O % 0.47 ISIRI 1061:1386
CaO % 0.010 ISIRI 10619:1386
L.O.I. % 0.48 ISIRI 8346:1384
+150 m % 10 ZSNP 03-01-05
-75 45 m % 40-50 ZSNP 03-01-05
+44 m % 11-14 ZSNP 03-01-05
Midean m 84.2 ZSNP 03-01-05

Nepheline syenite, a non-consisting free slica crystalline rock , is formed of albite ,
microcline type of feldspar and nepheline mineral. Non-consisting free slica , high
alkaline and alumina , high melting capacity and low melting range are ideal
characteristics of nepheline syenite adjusting to the ceramic and glass industry.
This means that the mineral nepheline syenite consists higher alumina and alkaline
compared to typical felspar. Nepheline syenite is an important source of silica (%59-60),
almina (%20-24 Al2O3) and alkali (% 8-10 Na2O, % 5-7 K2O). Nepheline syenite rock
consists of Nepheline, microcline and albite minerals.
Chemically low silica , high alkaline and miner logically non-consisting free silica in
nepheline syenite composition forms a glassy phase with low viscosity at low
temperature.
Moreover, high alumina in the composition increases the resistance of glassy phase
deformation and low deformation values are obtained despite high alkaline content.
Nepheline due to non-consisting free silica has a significant capability of reacting with
silica and resolving.
The high alumina and resolving capability of quartz in the composition of nepheline,
increases the durability by supporting mullite formation.