| Item | Chemical Composition |
| Al2O3 | ≥50% |
| Fe2O3 | ≤2% |
| Bulk density | ≤1.0g/cm3 |
| CCS | ≥5Mpa |
White Lightweight Refractory Mullite High Alumina Brick refers to a heat-insulating refractory product made of bauxite with
an Al2O3 content of not less than 48%.
White Lightweight Refractory Mullite High Alumina Brick are mainly made of bauxite clinker, combined with clay as raw
materials, mixed with binders and sawdust.
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:
White Lightweight Refractory Mullite High Alumina 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, White Lightweight Refractory Mullite High Alumina 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.
White Lightweight Refractory Mullite High Alumina 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.
