Principle, Manufacture and Application of Light Bone Refractory Materials (Ⅰ)

Principle, Manufacture and Application of Light Bone Refractory Materials (Ⅰ)

2023/10/16

The high-temperature industry is the basic industry for the production of structural materials (steel, glass, ceramics, etc.) and excellent functional materials (sensors, absorption materials, catalysts, energy storage materials, etc.). The refractory lining is the basis of high-temperature industrial furnace, which plays a vital role in the efficiency and quality of high-temperature industry. On the one hand, compared with radiation and exhaust gas, heat dissipation through the furnace lining is the main heat loss path adopted by industrial furnaces. Among them, the thermal insulation performance of refractory lining is one of the main factors that determine the energy efficiency and consumption of high temperature furnace. Refractory lining, on the other hand, involves the entire high-temperature production process.

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Principle, Manufacture and Application of Light Bone Refractory (Ⅱ)

Principle, Manufacture and Application of Light Bone Refractory (Ⅱ)

2023/10/16

Lightweight refractories made with this lightweight aggregate exhibit lower bulk density and thermal conductivity than ordinary dense refractories. However, a key challenge is the resistance of the material to slag erosion and the mechanical properties. In order to obtain lightweight refractories with guaranteed resistance to slag corrosion and stress damage, researchers have made several attempts to manufacture lightweight aggregates with a high proportion of closed pores and small pore sizes. The superplastic foaming method is a solution that allows the manufacture of ceramics with a high volume fraction of fine closed pores. In addition, lightweight microporous alumina, bauxite and magnesia materials can also be obtained by adding nano-additives.

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Principle, Manufacture and Application of Light Bone Refractory Materials (Ⅲ)

Principle, Manufacture and Application of Light Bone Refractory Materials (Ⅲ)

2023/10/16

When pore formers are added to the starting powder, they burn during the heat treatment, leaving voids in the ceramic material. The porosity level of the fabricated material can be easily controlled using pore formers compared to other techniques. In this case, a higher sintering temperature can be applied to the ceramic green body, thereby increasing the mechanical strength of the produced lightweight material. Currently used pore-forming agents can be divided into two categories: organic materials and inorganic materials. Commonly used organic pore formers include starch, rice hulls, seragos, PMMA microspheres, and walnut shells, while commonly used inorganic materials include coal ash and carbon.

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