Comprehensive protection of the metal jet from oxidation
23.05.2017
Inserts MKRV-340
Inserts and liners in the mold MKRV-340 is made of refractory fiber a mullite-siliceous composition, produced by melting pure aluminum and silicon oxides in an electric furnace with subsequent fiber formation by blowing. To give the material strength, an organic binder is added to the fiber, the products are formed by vacuum pressing.
Inserts MKRV-340 are used for thermal insulation of the main part of ingots of round, square, rectangular and polygonal sections. The products have a design for easy installation in a pouring mold or pouring form, income extensions are opposite or fixed with glue, and/or mechanical fasteners, staples. During installation, possible linear or volume shrinkage during heating is taken into account.
Inserts and tabs MKRV-340 with the following properties:
- high heat resistance
- low density
- low thermal conductivity
- low heat capacity
- structural strength
- the material is flexible and tightly fits the structures
- thermal shock resistance
- easily processed
- resistance to vibrations and deformations
The fibers are chemically resistant to acids and alkalis. When used at high temperatures, it should be protected from the effects of concentrated alkalis, hydrofluoric and phosphoric acids.
Fibers are more resistant to temperature effects in oxidizing and neutral environments.
In a reducing environment, thermal insulation properties decrease.
Application
- ingot castings for rolling on slabbing (rectangular blank)
- ingot castings for rolling on blooming (square blank)
- casting pipe castings (round billet)
- casting and forging castings
- foundry molds of machine-building foundries
Advantages
- reduction of the consumption coefficient of the metal when redistributing ingots in the billet and rolling of different sections
- ease of installation
- reduction of the metal capacity of the construction of castings and profitable extensions
- reducing consumption of ceramic refractories
- reducing consumption of insulating mixtures
- does not contain burning additives and asbestos
Technical specifications
|
Brand |
Inserts MKRV-340 |
|
Standard |
GOST 23619-79 |
|
Connective |
organic, inorganic |
|
Density, no more, kg / m3 |
340 |
|
Application temperature is maximum, ° С |
1650 |
|
Melting temperature, °С |
1800 |
|
Mass loss at 1000 °C, no more, % |
6 |
|
Thermal conductivity at 600 °C, no more, W/(m K) |
0.23 |
|
Heat capacity at 1000 °C, kJ/(kg K) |
1,047 |
Thermal conductivity of the material
|
T, ° С |
200 |
400 |
600 |
800 |
1000 |
1200 |
|
λ, W/(m K) |
0.15 |
0.19 |
0.23 |
0.29 |
0.40 |
0.53 |
Dimensions. Release forms
|
molding molds for slabbing - ingots by weight, tn |
14-21 |
|
blacksmith ingots by weight, tn |
0.1-120 |
|
pipe ingots under billets, inches |
5, 6, 9, 12 |
Inserts and tabs are produced in standard sizes, as well as in sizes according to the individual requirements of customers.