Introduction to Refractory Castable

Refractory castables are utilized in hazardous environments and thus their reliability should be accurately evaluated to avoid incidents.

Calcium aluminate cement (CAC) can induce the development of high green mechanical strength to refractory castables in a short period of time (24 h).

In refractory castables during heat treatment, there is a dynamic change from a hydraulic bond to a ceramic bond.

To achieve better performance of bauxite-corundum refractory castables in the steelmaking industry, we developed two reinforcement approaches (i.

: This paper compares the thermal shock damage resistance and the slag corrosion resistance of a high-alumina and an alumina-containing andalusite refractory castable.

Hydratable magnesium carboxylate (HMC), which is similar to the properties of cement, can be used as a potential binder for refractory castables.

A growing interest in designing high-alumina MgO-bonded refractory castables has been identified in recent years due to the magnesia ability to react: (i) with water at the initial processing stages of these materials (inducing the precipitation of brucite phase) or (ii) with alumina, giving rise to in situ MgAl2O4 generation at high temperatures.

Therefore, HCCCA can be used as a novel binder of carbon-containing refractory castables.

% in laboratory-scale conventional refractory castable samples fired at 120, 850, 1050, and 1400 oC.

Refractory castables develop microstructures after curing that behave as partially saturated porous media.

Aiming at optimizing properties of alumina-spinel refractory castables, coarse corundum particles were replaced partially with the particles of a novel porous multi-component CMA (CaO-MgO-Al2O3) aggregate in the same size.

Refractory castables are crucial for the production of steel and other materials.

As a case study to apply BCCs, a refractory castable was placed inside a climatic chamber, and cracks were generated due to localized expansions during its curing and drying.

Moreover, the scanning electron microscopy (SEM) results of HCM and refractory castable samples are presented in the paper.

Different nano-powders and colloidal suspensions have been utilized to improve the properties of refractory castables.

Matrix samples were obtained for phase and microstructural characterization in details, and the results were compared with those corresponding to the refractory castables.

Advanced high alumina refractory castables of ultra-low and to cement types, are well-known because of their ability on developing similar and/or superior thermal and mechanical properties.

The Fe and Mn of the molten steel transferred into the castable during the early smelting stage, so a reacted metamorphic layer with lower melting point was formed between the refractory castable and high manganese steel.

New challenges have been identified over recent decades regarding the increasing complexity of the dry out step of refractory castables, mainly due to the advances on the particle size distribution design (and consequent reduction in the ceramic linings' permeability) and growing demand for shorter equipment maintenance time, which generally results in pressures to speed up the drying.

ABSTRACT Among the most significant problems in industrial refractory manufacture, especially of monolithic refractories, are the formation of cracks and loss of strength in green bodies or during heating of the refractory castables.

The AE parameters were obtained in cyclic three-point bending for refractory castables showing different brittleness at failure.

In this study, mechanical and structural properties of two high alumina refractory castables, i.

The materials were manufactured by refractory castable technology and subsequently sintered at 1600 °C for 4 h.

Here, we have introduced a facile route to fabricate the Al2O3-CaO-Cr2O3 refractory castables to mitigate Cr(VI) using basic silica sol (pH∼9) via in-situ secondary phase modification.

The properties are also equated with the different advanced bonding systems of high alumina refractory castables.

In this paper, various aspects of the contribution and effect of nanotechnology, on the development of refractory castables are discussed.

In this study, the effect of reclaimed bauxite on andalusite-containing refractory castables for tundish applications was investigated.

The effect of replacing the ball pitch with coated graphite (CG) on the microstructure, apparent porosity, physical properties, oxidation resistance, and slag corrosion resistance of Al2O3–SiC–C (ASC) refractory castables was investigated by a scanning electron microscope, an energy-dispersive X-ray spectroscope, a transmission electron microscope, and other dedicated equipment.

Great efforts have been made recently to totally or partially replace calcium aluminate cement (CAC) by alternative materials in refractory castables, in order to attain an enhanced thermomechanical performance of these ceramic linings at intermediate temperatures (600–1200 °C).

In the present paper, the effect of silicon carbide (SiC) fines was studied on the phase and microstructural properties of bauxite-based low-cement refractory castables (LCC) at different firing temperatures.

Diffusion tests were performed with solid diffusants of Iron oxides in contact with porous silico-aluminous refractory castables in high-temperature conditions.

The physical properties of refractory castables at different temperatures have been estimated to supplement the rheological pattern.