Types and Properties of Refractory Materials for Electric Furnace Top
Electric furnace, also known as electric arc furnace, is a device that uses the electric arc between the electrode end and the furnace material as the heat source for steelmaking. It is mainly used to smelt scrap steel. The steel grade and process equipment, as well as the size of the furnace determine its internal structure, which is generally determined by the furnace top, wall, bottom, and tapping groove. Today we will talk about the prefabricated refractory materials used for the top of the electric furnace, as a reference for you to choose refractory materials for the electric furnace.
The prefabricated refractory material used for the top of the electric furnace is made of fused corundum and chromium oxide refractory raw materials as aggregates, with binders and additives added. After mixing, it is poured into the prefabricated mold and formed. After drying, it enters the drying room for drying.
1、 Physical and chemical indicators of prefabricated components on the top of electric furnace
project
Electric furnace top pouring material
eighty
eighty-five
Maximum operating temperature, ℃ ≥
one thousand seven hundred and twenty
one thousand seven hundred and fifty
Al2O3,% ≥
eighty
eighty-five
Cr2O3,% ≥
2-5
2-5
Volume density, g/cm3 ≥
110 ℃ × 24 hours
two point eight
two point nine
1600 ℃ × 3h
two point eight
two point nine
Compressive strength, Mpa ≥
110 ℃ × 24 hours
thirty
thirty
1600 ℃ × 3h
forty
forty
Bending strength, Mpa ≥
110 ℃ × 24 hours
six
six
1600 ℃ × 3h
eight
eight
Heating permanent line change 1600 ℃ × 3h%
0.2-0.6
-
application
Ultra high power electric furnace top and refining furnace cover
2、 Advantages of Prefabricated Parts for Electric Furnace Top
1. Easy installation, good usage effect, and long service life.
2. High strength, anti peeling, and good slag resistance in high-temperature environments.
3. Convenient construction, available for on-site pouring or off-site prefabrication.
3、 Manufacturing process flow of prefabricated components on the top of electric furnace
Raw materials - ingredients - mixing - pouring vibration molding - drying - packaging
1. Select the casting materials to be made based on the size of the electric furnace top, steelmaking process, steelmaking steel grade, etc.
2. Strictly control the size and grading of particles according to the formula for proportioning aggregates and powders.
3. Mix the prepared refractory raw materials evenly and then mix them strictly according to the specified time.
4. Set up the electric furnace mold, inject the prepared slurry into the mold, and vibrate to form it.
5. The prefabricated parts on the formed furnace top are removed from the mold and enter the drying room to remove moisture.
6. The dried prefabricated parts are packaged and sent to the site to avoid collisions during transportation.
Note: During on-site installation, follow the operating regulations and pay attention to construction safety.
The above is a brief introduction to the prefabricated components used for the top of the electric arc furnace. The refractory materials used for the top of the electric arc furnace vary slightly depending on factors such as the size of the electric furnace, steelmaking process, and steel grade. For specific information, please consult Chongde Refractory Technology. We will provide you with suitable refractory materials based on the electric furnace you are using.