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Product Name:Crucible Furnace Cover Brick
Product Description:
Description
Crucible furnace cover brick
Clay Brick, clay brick mainly mullite (25% ~ 50%) and cristobalite and quartz (up to 30%) composition. Usually, the hard clay is used as raw material to calcine the clinker in advance, and then the soft clay is used to calcine the brick at 1300 ~ 1400 °C. It is commonly used in blast furnace, hot blast furnace, heating furnace, power boiler, lime cellar, Rotary Cellar, ceramic and refractory brick firing cellar.
202210271452589de53e6d1eac4ed1863de9f6d5835abf
20221027145258ead16ebf938043bb995cd79ccc718378
Huanya supplying a comprehensive range of CLAY FIREBRICKS.Alumina content in approximate 28-45% are classified to CLAY FIREBRICKS
Note:Special-shaped Clay Firebrick is more expensive than commom square or rectangle ones.
Clay Firebrick Product Data
Material
Common
Special
Blast furnace
Hot blast stove
Glass Furnace
Item
SK32
SK34
ZGN-42
GN-42
RN-42
RN-40
RN-36
BN-40a
BN-40b
Pyrometric Cone Equivalent
Orton cone
31-32
33-34
–
–
–
–
–
–
–
Refractoriness (°C)
1715
1760
1760
1760
1760
1740
1700
–
–
Bulk Density (kg/m3)
2100-2200
2200-2250
2200
2200
2200
2200
2150
2250
2250
Apparent Porosity (%)
22-24
18-20
≤15
≤16
≤24
≤24
≤25
≤18
≤18
Cold Crushing Strength (MPa)
22-32
30-35
≥58.8
≥49.0
≥29.4
≥24.5
≥19.6
≥49.0
≥34.3
Modulus of Rupture (kg/cm2)
55-70
60-80
–
–
–
–
–
–
–
Reheat test,
permanent
linear change
after heating at
(1350°C%,3h)
–
–
–
–
–
0~-3
0~-0.5
(1400°C%,2h)
–
–
–
–
–
–
–
0~-0.4
0~-0.4
(1450°C%,3h)
–
–
0~-2
0~-3
0~-0.4
–
–
–
–
(1400°C%)
0.0-0.2
-0.18
–
–
–
–
–
–
–
0.2 MPa soft under load (%)
–
–
≥1450
≥1430
≥1400
≥1350
≥1300
≥1450
≥1400
SiO2 (%)
57.8
52.4
–
–
–
–
–
–
–
Al2O3 (%)
36.2
42.1
≥42
≥42
≥42
≥40
≥36
≥40
≥40
Fe2O3 (%)
2
1.4
≤1.7
≤1.7
–
–
–
≤1.5
≤1.5
Cao (%)
0.5
0.4
–
–
–
–
–
–
–
Na2O+K2O+Li2O (%)
0.5
0.5
–
–
–
–
–
–
–
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Crucible furnace alchemy operation process is as follows:
(1) Heat up and bake: slowly raise the furnace temperature and bake the crucible. The slow heating is to prevent the wet crucible from bursting due to sudden heating.
(2) Heating and feeding: When the temperature continues to rise to 800 °C, take out the crucible from the furnace, carefully add the stirred charge into it, and cover the upper part of the charge with a small amount of borax. When the charge in the crucible is melted, stop the oil and stop the air, add part of the charge wrapped in paper, and continue heating. Charges can be added multiple times.
(3) Melting: After the charge is added enough, it enters the full melting stage. Usually, a 20# crucible can melt 10-15 kg of gold mud at a time. It takes 1.5 hours to melt. Take it out, and quickly pour the melt into a squatting tank (a conical cast iron tank with a big mouth and a pointed bottom) to cool in layers, pour it out after condensation, and strike with a small hammer to separate the slag from the gold-silver alloy.
(4) Ingot casting: After smelting, all gold nuggets are concentrated for ingot casting.
Crucible smelting is mostly found in small mines, and is suitable for smelting gold placer, amalgam and gold-containing steel wool, and can also be used for smelting cyanide gold mud.
testing center-01
Why Choose Us
1.Strong professional:
Our company has thirty years producing experience in refractory products. Our manager will supervise on a various refractories production materials, process control, quality supervision and package delivery, and ensure the products are 100% qualified.
2.Annual supply:
Our company has passed ISO 9001 quality management system certification and SGS certification. And the annual supply of shaped and unshaped refractory product is 28, 800-35, 000 tons.
3.Export experiences:
Now we have gained a global sales network reaching Russia, South Korea, Vietnam, Pakistan, Bulgaria, France, India, Egypt, Congo, Angola, South Africa etc.
4. Production equipment:
Production and testing equipment are new, complete and automated or semi- automated. Such modern facilities and equipment have provided the fine technical guarantee for the production and testing.
5. Testing equipment:
Our company's testing equipment as follows:
High Temperature RUL. Tester
Bulk Density Tester
The Pressure Tester
Refractoriness Tester
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Factory and Machines
Huanya Refractory CO.,LTD has been established over 10 years, now we |
