High quality manufacturer fused magnesia alumina spinel for
refractory fireproof brick
High quality manufacturer fused magnesia alumina spinel for
refractory fireproof brick :
| Item | Chemical Composition |
| Al2O3 | ≥50% |
| Fe2O3 | ≤2% |
| Bulk density | ≤1.0g/cm3 |
| CCS | ≥5Mpa |
High quality manufacturer fused magnesia alumina spinel for
refractory fireproof brick is also called high alumina insulating
brick. It contains more than 48% Al2O3 and mainly consists of
mullite and glass phase or corundum. It is usually made of high
bauxite and a small amount of clay. After the raw materials are
grounded, it is made into mud. Then it is cast and molded and fired
at 1300~1500℃. Sometimes industrial alumimum is used to replace
bauxite. Inorganic matter is added as ignition loss substance in
order to increase the porosity of the refractory.
High quality manufacturer fused magnesia alumina spinel for
refractory fireproof brick is an ideal insulating refractory
refractory material, with advantages of high strength, low thermal
conductivity, good insulation property and low price. For various
industrial kilns & furnaces, it is a kind of essential refractory
for energy saving and temperature preservation.
In order to improve product performance, industrial alumina,
corundum, sillimanite, kyanite, and silica are added The powder can
be produced with bulk density above 0.4g/cm3. Al2O3 content and
bulk density are different, the highest operating temperature is
also different, usually 1250-1350 ℃, some up to 1550 ℃
Production process:
High quality manufacturer fused magnesia alumina spinel for
refractory fireproof brick includes five parts: preparation of foaming agent, preparation of
foam slurry, molding, drying and firing.
(1) Preparation of foaming agent.
(2) Modulation of foam mud.
(3) Forming.
(4) Dry.
(5) Firing.
Features:
1. High porosity
2. Small bulk density
3. Low thermal conductivity
4. Small heat capacity
5. Good thermal insulation
6. Lightweight
Compared with dense refractory bricks, High quality manufacturer fused magnesia alumina spinel for
refractory fireproof brick have the following advantages:
(1) With low heat storage and high thermal efficiency, it can speed
up the turnover of intermittent operation kilns, improve production
efficiency, reduce fuel consumption and save energy.
(2) Low thermal conductivity, which can reduce the thickness of the
furnace wall and roof, reduce the quality of the furnace body, and
simplify the structure of the furnace.
(3) The furnace temperature can become uniform. Conducive to
improving product quality.
(4) The temperature outside the furnace is low, which is convenient
for operation, improves labor efficiency, and improves labor
conditions for kiln installation and discharge.
Application:
1. Quenching furnace
2. Annealing furnace
3. Box type electric furnace
4. Small heat treatment furnace such as pit electric furnace
5. Tunnel Kiln
6. Roller Kiln
7. Hot air stove of blast furnace
8. Coke oven and other large kilns.
High quality manufacturer fused magnesia alumina spinel for
refractory fireproof brick are widely used in thermal equipment in metallurgy, petrochemical,
machinery, electric power, building materials, aerospace,
shipbuilding and other industrial sectors.
Zhengzhou Annec CO., Ltd. was founded in 2003, and has been a
NASDAQ listed corporation since 2011 with ticker identification
ANNC. Annec had become the industrial leader within China in the
areas of refractory production, Engineering for hot blast stove of
blast furnace, and capability for EPC project. Annec has its own
Provincial Enterprise Technology Center and Top Combustion Hot
Blast Stove Research Centre, Annec (Beijing) Engineering &
Technology Co., Ltd and four Manufacturers for Refractories. The
annual output of different type of refractories can reach 150
thousand tons, and undertaken capability of more than 10 turnkey
projects for hot blast stove.
