Taking a company’s self-heating copper smelting furnace as an example, it is mainly used to process nickel-containing copper concentrate. This copper concentrate has high nickel content, low iron content, low sulfur content, and no gangue. Based on the furnace conditions and the following principles for selecting refractory materials, we use high-quality magnesia-chrome bricks as the … Read more
Two silicon-carbide mullite bricks, commonly used in the low-temperature zone of cement rotary kilns, were randomly selected. One was silicon-carbide mullite brick 1680, and the other was silicon-silicon brick 1550. Alkali erosion resistance tests were conducted using the static crucible method. Samples measuring 80 mm × 80 mm × 80 mm were cut from each … Read more
Energy-saving refractory materials, also known as energy-efficient refractory materials or lightweight insulating refractory materials, refer to refractory materials that significantly reduce heat loss in industrial kilns, lighten equipment weight, and lower production energy consumption while maintaining excellent high-temperature resistance through methods such as reducing material bulk density, lowering thermal conductivity, and optimizing structure. These materials … Read more
Vertical ladle zinc smelting is an important zinc smelting process. The outer side of the vertical ladle furnace is in direct contact with a high-temperature flame of 1300-1340°C, while the inner side is in direct contact with zinc vapor and slag reaching up to 1200°C. It is subjected to high temperatures, oxidation, thermal shock, erosion, … Read more
The gasifier serves as the primary component of a pressurized coal-water slurry gasification unit, and the quality of the refractory bricks used in its construction is the principal factor determining the gasifier’s operational cycle. Gasifier operation entails conditions of extreme temperature and high pressure. Oxygen and coal slurry are injected into the gasifier through opposing … Read more
Phosphoric acid reacts negligibly with acidic oxides at room temperature and does not undergo hardening; consequently, it is unsuitable for use as a binder in acidic refractory materials. In contrast, phosphoric acid reacts with amphoteric oxides (such as Al₂O₃) at room temperature to form a hard solid, and the reaction rate between them can be … Read more
As an advanced type of firing equipment, the shuttle kiln has found widespread application in various sectors: in the machinery industry—specifically in plants producing electrical ceramics and grinding wheels; in the building materials industry—within sanitary ceramics factories; and in other fields such as environmental protection and refractory materials. Characterized by low energy consumption, uniform temperature … Read more
Furnace Insulation and Fire-Blocking Boards: Ceramic Fiber Boards. The furnace chamber—also referred to as the furnace core or combustion chamber—requires the use of insulating materials characterized by low thermal conductivity, whether for the chamber itself or for pre-formed furnace cores. As the combustion chamber, the efficiency of fuel combustion directly determines the temperature attained within … Read more
Following the completion of carbon or graphite brick masonry in the blast furnace hearth, carbon-based monolithic materials are also required. The primary monolithic refractory materials utilized in the blast furnace hearth are carbon ramming mixes and carbonaceous injection mixes. Carbon Ramming Mix Carbon ramming mix is categorized into two types: that applied to the furnace … Read more
To achieve low-carbon, energy-efficient, and high-performance operation—characterized by elevated blast temperatures, extended service life, and large-scale capacity—in blast furnace hot blast stoves, increasingly stringent requirements have been imposed on the refractory materials utilized therein. Bauxite-based homogenized materials, produced through a process of homogenization and sintering, exhibit a uniform microstructure distribution as well as stable chemical … Read more
