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Refractory castable

Refractory castable is a granular or powdery material prepared by mixing refractory aggregate and refractory powder according to a certain ratio and adding an appropriate amount of binder.
Refractory castable has high fluidity and is a kind of amorphous refractory suitable for casting molding. Its plasticity is strong, wide range of applications, can be used according to the conditions of use to the material and binder to be selected, the optional material is clay, high aluminum, silicon, magnesium, magnesium chromium, silicon carbide, silicon nitride, zircon and so on.

Product description:

◎ Refractory castable is a granular or powdery material prepared by mixing refractory aggregate and refractory powder according to a certain ratio and adding an appropriate amount of binder.
◎ Refractory castable has high fluidity and is a kind of amorphous refractory suitable for casting molding. Its plasticity is strong, wide range of applications, can be used according to the conditions of use to the material and binder to be selected, the optional material is clay, high aluminum, silicon, magnesium, magnesium chromium, silicon carbide, silicon nitride, zircon and so on.
◎ Refractory castable according to the conditions of use can be prepared acid-resistant or alkali-resistant castable, wear resistance and erosion resistance castable.
◎ Refractory castable can be directly cast into the lining body, or can be used by casting or shaking method into prefabricated blocks. Refractory castables are used as integral linings, often in combination with metal or ceramic anchors, or with stainless steel fiber reinforcement to improve mechanical and thermal shock resistance.

Product category:

According to the combination form:

◎ Ordinary refractory castable JMC (CaO>2.5%)

◎ Low cement refractory castable JC (2.5%>Ca021.0%)

◎ Ultra-low cement refractory castable JUC (1.0%>Ca020.2%)

◎ Cementless refractory castable JNC water glass bonded castable, phosphate bonded castable

By aggregate:

◎ High aluminum refractory castable (Al2O3≥45%)

◎ Clay refractory castable (45%>Al2O3≥10%)

◎ Silica refractory castable (SiO2≥85%,10%>Al2O3)

◎ Alkaline refractory castables (magnesia, chromite, spinel, magnesia olivine, dolomite, and other alkaline earth metal oxides)

◎ Special refractory castables (carbon, carbide, nitride, quartz, etc.)

Product features:

◎ Wear resistance — impact resistance, erosion resistance, wear resistance, long service life.

◎ Acid and alkali resistance – special high temperature atmosphere, corresponding to special ingredients, acid or alkali resistance.

◎ Fast hardening and drying – 2~3h after pouring hardening, can immediately oven.

◎ High refractoriness – excellent material selection, high refractoriness, excellent high temperature performance.

◎ Convenient construction – machine mixing, vibration pouring construction.

◎ Saving the construction period – greatly shorten the construction period, significant economic benefits.

Typical application:

◎ Heating furnace lining; Furnace in flame environment, such as rolling steel heating pit wall, top, bottom, water pipe, burner casting or prefabrication, industrial boiler lining; High strength and low cement – clay, high aluminum, mullite castable – are used in chemical equipment such as synthetic ammonia 1 and 2 stage conversion furnace lining for pouring.

◎ Refractory lining of industrial kiln uses harsh environment, erosion, with ultra-high strength – high aluminum, mullite, corundum castable.

◎ Mechanical shock, vibration, wear, frequent cooling and heating parts, such as flame environment heating furnace door, door frame, soaking furnace cover; Steel fiber reinforced for high temperature cement kilns, coal shotguns, etc. – clay, high aluminum, mullite, corundum refractory castable.

◎ High temperature washing parts of flame furnace, burner brick, sintering igniter, fire shield beam, furnace bottom, cement rotary kiln, lime kiln, waste burning. High alumina, mullite, corundum refractory castable without cement is used in the furnace

◎ Refractory lining of all kinds of industrial kiln equipment, such as all kinds of rolling and metallurgical heating furnaces, soaking furnaces, annealing furnaces, heat treatment lining bodies, industrial boilers, tunnel kiln inverted flame kiln, gas furnace lining bodies can be combined with clay refractory castable.

◎ Special atmosphere, pipe bandaged application of prefabricated refractory castable precast.

Technical index:

Item Several common refractory castables
Product name Clay castable Low cement high aluminum castable Mullite castable Corundum castable
Product code RDGW-NN/NL RDGW-GL RDGW-M RDGW-G
Use

temperature

1350~1450 1300~1500 1550 1650
Unit weight Kg/m3 2000~2400 2200~2600 2700~2800 2800~3000
Aluminum content % 45/60/70 60/70/75/80 68~77 95~99
Compressive strength after drying (MPa) ≥10 ≥35 ≥40 ≥70
Flexural strength after drying (MPa) ≥2 ≥5 ≥6 ≥7
Linear change rate%,T×3h ≤1 ≤1 ≤1 ≤1
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