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Refractory material
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AX Introductio
n
Q History and importance
الداع دده
ceramic
material o:
product whose
chemical and
oe The urgent need of steel ۳۷۹۵
properties allow industries and ...
1318 Aminabad refractory factory in
& Tehran with a daily capacity of 5,000
tons
Azar refractory in Isfahan with
oe production capacity of 40,000 tons
of bricks and mass
Comparison with ۳ * الق
metals: More resistance to creep, لكا 2
heat
temperature Y Less deformation "” Low thermal
environment conductivity
¥ Economic =
factor ۳
صفحه 4:
Refractory
requirements
High temperature
ae) (1 eal
Heat storage capa!
luted 1 اناد
مأ دعومقطء معلل0ند
The general لكاي ينا
تسیا تا ات ۱۳ requirement
خأمعاء لقعم sofa
3 5 refractory
۱۰۱۰۱۱۱۶ ۸: ile lie)
08۲۵۶ ۷۱۱۲۱ ۸
metals, hot gases and
erosion) and ... لالأأعهمقء وماموع8
قضة ومألده! غأكصتهوج
abrasion forces ایا لت ارت
operating conditions
صفحه 5:
/ ۳۲۵۵۵۵۵
4 5 ۲ اك وتسم
ید eet
6
impact
ert
متعدعطة ۹
1
نت
6
و
ae 0
اسان refractor »
55 00
Pony
reenter
Porosity
Ertl
density
‘Thermal sai
Er tt ۰ یی |
لان
5 |
ae
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Classification based on chemical
composition
O Stable to acids but attacked
by alkalis
>> Acidic
EB Vettes ti tr tcre (0 YAO
۸ Refractories
* Stable to alkaline but
Bier omy terete
Refractories * Magnesia (MgO) م29
‘* Dolomite (MgCO, + CaCO,) and
chrome-magnesia (Cr,0, + MgO)
كلع طامط مغ عآطهز5 2
(@mmeviral Refractories كن
> Alumina (Al,0,), chrome
(Cr,0,) and carbon
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00 Bauxite refractories
Om ا ا لي لالت Cy
0 انا
3 Silica carbide refractory
0 Forsterite refractories |
Oxide refractories such as beryllium
2 Pte erter mente iit
۳ 8
Classification based on raw
material
3 Silica refractories
9 Magnesium refractories
3 PPC ت رت
98 Graphite refractories
ا ا الاك 3
3 Alumina silicate refractory
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۲ Ay Classification based on raw
Magnesite refractories
* More than 90% SiO,, less than 8.5%
of oxides of aluminum, titanium,
iron and calcium
Advantages:
Y No softening until fusion point is
reached;
7 High refractoriness;
Y High resistance to spalling flux
and slag,
.,.” _ Volume stabili
ilica refractories
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Graphite reduces the
Wettability properties of
corrosive slag
‘eases thermal conductivity
Improves thermal shock
Used arbistaneducing
conditions
U High thermal resistance
of graphite and a small amount
clay
A Graphite 7 aA
refractories
Q Bakhtaran Dolomite, Isfahan
(Hassan Robat)
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Classification based on raw
eo etary
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Ay Classification based on raw
LX
~ material
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/ Classification based on physical
~~ shape
۲ ١
ار Unshaped
للم نا ا
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وم
Rammi
gM
Unshaped
Xe
tabl oe
e
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bond
1
1 af
ین
ود
— ۳ مه هه
Conventi 0 5
_onal jerec morta
صفحه 15:
Steel and iron industry
Copper industry
Application
of
refractories
material
Aluminum industry
Cement industry
Glass industry
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Steel
111111177
QO major consumer of refractory = 70
materials /
5 =
Sabie tim ite tt) ۵ تدعط ومتل۲۷۵
SATO Cay O Side walls
Y Torpedo ladles ا ل"
۷ جمونوده منع8 Q Hot spots
همفصن۳ 0 6 1
QO Slag leve
۱۵:
Furnace Y Energy Optimizing 4 Burner valves and slag
امه م۳
عممصس Y Secondary Refining 1 Ceiling
at سید
2215م ا
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‘Copper industry
Chromite-magnesium refractories Aluminosilicate materials
Cela Tee Umum tly
Slag cleaning ايا يت
د 1 Co 72 یا
er
atta Magnesite-chromite refractories with Magnesite-chromite ا ا
Ag strength, at high temperatures and refractories direct ممز۱0 ۲۵۶۵
عوط bonded Pema ete Cec
1 ۱ و ا
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/ ا 0 عالق
Y Zirconia refractory
ل
4 ا لنت
كنا
tty ل لكا
temperatures
زان رز ۲۳۶۹۱ حون ۷
ation امعم ۷
materials
Regenerators
High resistance to thermal shock ¥
Laat ا ل Rep ingot Me
معصماعنوعد ومع0 ۷
فا وت ۱۰۱۱۱
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Melting/Holding
ladles Furnace
Jaunde
High corrosion
High strength”
High alumina bri
eclaigh alumina bricks with
@hesphetehindsties with little or
Aluminum
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Pre ۱۹۸
Calciners furnace
Ducts Coolers
Y Dolomite refractories
¥ Magnesia-chrome
ا[عصنمهك
¥ Magnasia-Alumina
oy yn |
a stata CN
Cement
industry
صفحه 21:
noe)
[1] Schacht, Charles. Refractories handbook. CRC Press, 2004.
[2] Nemati, Ziarat Ali, Ceramic refractories, Tehran:
Scientific publications of Sharif University of
weed vite) Cen اللو
[3] Gerald Rothschka, translated by Dr. Behzad Mir Hadi, refractory materials,
second edition, September, Iran University of Science and Technology, 1999.
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