Blast Furnace Composition
The blast furnace is divided into a furnace throat, a furnace body, a furnace waist, a belly, a hearth bottom, an iron tap, and a blast furnace tap.
The blast furnace throat is usually made of excellent clay bricks or high density high alumina bricks.
Clay bricks and castables can be used as linings for large and medium sized blast furnaces, or SiC bricks
Lining protection tube, straight blow tube and medium gas lift pipe are lined and repaired with spray paint
The furnace body is composed of low porosity clay bricks and
high alumina bricks.
Silicon nitride and silicon carbide bricks for the waist of 1000m3 or more
Sic brick is used for the waist of the blast furnace below 1000m3
China's general use of silicon carbide bricks
Germany generally uses semi-graphite bricks, fused corundum bricks, mullite bricks, direct bonded or silicon nitride bonded silicon carbide bricks.
Dutch semi-graphite brick
European and American blast furnaces use silicon carbide bricks and graphite bricks
Hearth furnace bottom China, Japan, Russia mostly use carbon brick, aluminum silicate refractory brick, clay brick and other comprehensive furnace bottom
The United States uses a full carbon brick bottom
Blast Furnace Iron Drainage Main groove uses corundum silicon carbide carbon material ramming material.
Hot-water bauxite is made of high-alumina bauxite clinker silicon carbide carbon-based material
Clay bricks are generally used when the air temperature is lower than 900 degrees.
When the wind temperature is higher than 900 degrees, the lining and checker bricks in the high temperature part are made of high alumina brick, mullite brick, sillimanite brick and silica brick.
The smelting reduction furnace includes a prereduction furnace and a final reduction furnace
Pre-reduction furnace Commonly used clay bricks, high-aluminum bricks have high requirements for peeling, abrasion resistance and impact resistance.
Final reduction furnace Aluminium carbon brick, high alumina brick, carbon brick, aluminum silicon carbide carbon brick are used for the equipment adopting the converter and the electric furnace.
Converters Oxygen converter linings are mostly made of carbon-containing alkaline refractories, magnesia bricks, magnesia carbon bricks, and immersion bricks.
Electric furnace, furnace cover, high alumina brick (general aluminum content above 70), alkaline brick, castable and ramming material.
Furnace wall, magnesia brick, magnesia brick, magnesia carbon brick
Magnesium Ramming or Castable
Cast iron tank Magnesium, high alumina, carbon or silicon carbide material, can be brick or masonry
Furnace Refining Furnace
AOD furnace uses magnesia brick, refractory concrete ramming material
The ladle used in the VOD furnace, the lining except the slag line area is mainly made of ordinary magnesia brick, zircon brick and high alumina brick.
Magnesia or clay bricks for permanent lining; magnesium ramming at the bottom of the ladle and the side wall
Ladle furnaces use magnesia bricks, magnesia chrome bricks, magnesia carbon bricks and high alumina bricks, high alumina castables and spray coatings
RH uses high alumina bricks, magnesia bricks, magnesia bricks, and ramming and castables
DH furnace adopts direct combination, electrofusion and recombination and semi-recombination of magnesia-aluminum chrome brick, or use of magnesium silicon carbide brick, magnesium carbide silicon carbide brick, nozzle and other parts with high aluminum or corundum castable and beating Magnesium chrome ramming material
Steel drum vacuum arc heating degassing furnace VAD uses magnesia brick, magnesia carbon brick, high alumina brick
The LF furnace uses magnesia carbon bricks and does not burn high alumina bricks.
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Stirring iron barrel 1 Brick lining Clay brick, high alumina brick, zircon brick, magnesia carbon brick
Projection lining
Beating lining with zircon enamel and high-aluminum and aluminum-chrome ramming
Pouring and vibrating linings with siliceous, magnesia-chrome and zircon and high-aluminum
Stirring iron barrel 2 lining brick, permanent layer of barrel, barrel wall and bottom of the barrel, using clay brick,Zircon bricks, magnesia carbon bricks
Sleeve and plug bricks are made of clay and high alumina
Block bricks are generally divided into clay and high alumina
The nozzle brick is generally clayy and high alumina, magnesia, corundum, zircon
Argon blowing bricks 1. Argon blowing rods are often made of Al2o3-Cao and Al2o3-Sio3-Cao series castables.
2. Breathable brick
Sliding nozzle 1. Block bricks Made of clay and high alumina
The cork is made of corundum and alkaline refractory
Skateboard bricks are made of high-aluminum, corundum, magnesia, magnesia and chrome, aluminum and aluminum-zirconium
The water inlet does not burn high aluminum, fused quartz stone brick, aluminum carbon
Fused quartz and aluminum carbon refractories are used in long nozzles
Intermediate tank: divided into inner lining, barrel wall and bottom of the barrel, using clay brick
Slag line area: zircon brick, magnesia carbon brick
Coating: High alumina, magnesia and magnesia chrome brick coating
Insulation board: Silicone insulation board, resin bonding
Slag wall: can be built with ordinary fired bricks or prefabricated blocks
Sizing nozzle
Sliding nozzle
Immersion nozzle for pouring fused silica for general steel grades
Cast aluminum steel with high quality steel
Heating furnace: clay brick, silica brick or high alumina brick for furnace cover and furnace wall
Lightweight clay brick or aluminum silicate fiber felt for insulation layer
Step-type heating furnace: plastic and heat-insulating materials for furnace body
Masonry for the bottom and flue
Rotary bottom heating furnace: the furnace wall is made of clay brick, high alumina brick
The roof is made of high-alumina brick or clay brick
Bottom clay lightweight insulation brick, the bottom of the furnace is made of castable prefabricated large-scale opposite-soil bricks, and the middle part of the furnace is made of clay bricks.
The whole furnace can also be poured and beaten with clay refractory castable or plastic.
Rapid heating furnace: blast furnace brick and castable
Clay bricks and castables in the middle of the furnace wall
The working layer of the bottom of the furnace is made of clay bricks and castables.
The thermal insulation layer uses lightweight clay bricks and ceramic fibers
Induction heating furnace: alumina-based and silica-based castables
Forging furnace: clay brick and clay castable for furnace wall
Clay brick and clay castable
Clay brick, magnesia brick, magnesia castable
Insulation layer using clay insulation brick, fiber felt
Annealing furnace: divided into cold-rolled steel annealing furnace, generally with light clay bricks and insulating bricks
Wire annealing furnace is divided into bottom furnace, generally used with light clay bricks and insulated bricks.
Cover furnaces generally use lightweight refractory materials and refractory fibers
Wire annealing muffle furnace generally adopts clay brick
Steel pipes and bar annealing furnaces generally use clay bricks and insulated bricks, which are divided into two types: dome and hanging structure.
Casting annealing furnace is divided into clay refractory castable
Carburizing furnace, generally using heavy anti-carburizing brick
The heat treatment furnace uses high-aluminum and aluminum silicate fired products or amorphous refractories
