Refractory materials used in iron stove
Iron stoves are essential in many industrial fields, as they are used as furnaces and heating devices. The structure of the iron stove is made of furnace wall bricks, furnace roofs, furnace doors, and stoves. The material is mainly clay bricks or firebricks, which must have excellent thermal shock resistance, abrasion resistance and good chemical stability, which can resist higher temperature and corrosive gas. They are called refractory materials.
Refractory materials are important materials for building iron stoves, and their quality directly affects the performance and service life of iron stoves. Generally, the temperature resistance of materials used in iron stoves is high, generally 1200~1400℃. Taking into account the molten iron temperature of 1420~1540℃, the furnace linings used to smelt iron in iron stoves are more required to have stronger thermal shock resistance and high temperature performance. There are various materials available on the market, often with different properties such as bonding strength, air permeability and thermal shock resistance, so users must take the furnace conditions into account before selecting a suitable material.
Magnesia-chrome brick is used as the lining material in high-temperature parts (such as the crown and top of blast furnace or other types of iron stove), as it has good thermal shock resistance due to its MgO content. Magnesia-chrome bricks are made of magnesia, chrome ore and a binder, formed in the form of an arc. It has good thermal shock stability, mechanical strength and good erosion resistance to molten steel and iron slag.
Magnesia-carbon brick is often used in the iron stove hearth because the material has low thermal expansion, high strength and high refractoriness, as well as excellent resistance to alkaline slag erosion. Magnesia-carbon bricks are mainly composed of MgO, C and SiC. Magnesia- carbon brick is a kind of new magnesia refractory material which is produced by synthesis technology. It has high strength, low thermal expansion and good thermal shock resistance. It has high refractoriness and is suitable for furnace bottom.
Play ball brick is the main material of flue, upper and lower channels and other parts of iron stove. The material of the ball brick is mainly clay, and sintered brick made of tabular alumina, alumina and Mullite as refractory raw material is often used in furnace bottom, furnace wall and furnace door. The ball brick has the characteristics of low thermal shock resistance, low price, good air permeability and strong bonding strength.
Silicon carbide brick is also a kind of refractory material with high temperature resistance and high thermal shock resistance. It is used as lining material in steel furnace and hot furnace roller hearth. The main materials are silicon carbide and carbon. The silicon carbide brick has features like high temperature resistance, good thermal shock resistance and slag corrosion resistance. It is suitable for parts of the furnace that require strong airtight and good thermal shock resistance.
The above are some of the common refractory materials used in iron stoves in industrial production. Different materials should be selected according to the temperature of the furnace and the condition of the slag, so as to ensure the normal production of the furnace and prolong its service life.
