Long Nozzle Long nozzle: During continuous casting, the long nozzle connects the ladle to the tundish. Its function is to block air during molten steel pouring, preventing secondary oxidation and nitrogen absorption, while also curbing molten steel splashing and slag entrainment. As molten steel rapidly flows through the nozzle, it must exhibit excellent thermal shock […]

Standards for replacing tapholes (1) The tapping time is less than 3 minutes. (2) The tapping hole is irregular in shape or has obvious pits inside, and the tapping steel is scattered. (3) The tapping hole life is longer than the specified furnace life, which is pre-arranged according to the production plan. How to replace

CaO-ZrO2-C submerged nozzle linings often experience abnormal damage during practical use. Analysis indicates this is due to the formation of large amounts of ZrC during use, which causes microstructural degradation. To improve this, technicians at Shinagawa Refractory Co., Ltd. in Japan explored measures to suppress the ZrC formation reaction under low CO partial pressure conditions.

Rotary kiln refractory magnesia calcium carbon bricks have many excellent properties and are widely used in refining outside the furnace. However, there are still some problems in the use of magnesia calcium carbon bricks. High-temperature reaction of magnesium oxide and its resistance to slag penetration Above 1500°C, the MgO in the Mg-Ca-C refractory matrix readily

Overview of Commonly Used Refractories for Tundish During the steelmaking process, the tundish needs to withstand extremely high temperatures and strong erosion from molten steel, so choosing the right refractory material is crucial. The following are some commonly used tundish refractory materials: High alumina refractory materials High-alumina refractory materials are made from high-bauxite ore and

Refractory materials, the “industrial armor” of high-temperature industries like steel, cement, and nonferrous metals, are directly linked to the security of China’s basic industries. Currently, my country’s refractory industry is undergoing a period of profound adjustment, facing multiple challenges including overcapacity, environmental upgrades, and structural shifts in demand. Industry Status: Overcapacity and Transformation Pains Coexist

1.Alumina cement castables Alumina cement castables are generally used in the low-temperature zone, flue area, and furnace body of heating furnaces with a temperature not exceeding 1300°C. Alumina cement castables are a type of castable produced by mixing various refractory aggregates and powders in a certain proportion using aluminate cement as a binder. They have

Industrial heating furnaces are widely used in industries such as metallurgy, petroleum, and chemicals to heat metal materials to temperatures suitable for rolling and forging. The article details the key structures of industrial heating furnaces, including the radiation chamber, convection chamber, waste heat recovery system, burner, and ventilation system. The radiation chamber primarily heats the

As the core equipment of steelmaking, the quality of converter lining construction directly determines the service life and production efficiency of converter. This plan combines advanced domestic and foreign experience to build a systematic solution from three dimensions: material selection, process optimization, and quality control. It focuses on the differences in working conditions in different

The roof of a steel rolling heating furnace can be divided into two types: arched roof and flat roof. The arched roof is built with refractory bricks. Generally, the inner layer is a 232mm or 300mm thick refractory brick layer, and the outer layer is covered with an insulation layer. This type is only used