What should be paid attention to during the production of insulating refractory bricks

In today's high-temperature industrial environment, the quality of insulating refractory bricks directly affects the safety and work efficiency of equipment. Dongtai Hongda always adheres to the principle of "quality first" and ensures the excellent performance of its insulating refractory bricks in various applications through rigorous raw material selection, precise proportioning and mixing process, scientific molding and drying treatment, and strict firing and cooling process.

Raw material selection and quality control
Dongtai Hongda's insulating refractory bricks mainly use high-purity alumina (Al₂O₃) and silicate (SiO₂) and other mineral raw materials. The company has established long-term cooperative relations with well-known domestic and foreign mining companies to ensure the purity and stability of the raw materials used. In order to ensure product quality, Dongtai Hongda has implemented a strict raw material inspection system, and conducts comprehensive chemical composition analysis and physical property tests on each batch of raw materials to ensure that they meet production standards. This series of measures not only improves the reliability of the product, but also provides customers with higher safety guarantees.

Raw material proportioning and mixing process
The proportioning and mixing process of raw materials are crucial to the final performance of insulating refractory bricks. Dongtai Hongda uses an advanced computer batching system that can accurately control the ratio of various raw materials to ensure the stability of the chemical composition of the product. During the mixing process, efficient mixing equipment is used to reasonably adjust the stirring time and intensity to ensure that the raw materials are fully and evenly mixed. This process lays a solid foundation for subsequent molding and firing, ensuring that the final product reaches the industry-leading level in all performance indicators.

Molding and Drying Process
Molding is a key link in the production of insulating refractory bricks. Dongtai Hongda has introduced advanced technologies such as isostatic pressing and vibration molding to ensure the dimensional accuracy and shape stability of the products. During the molding process, the company strictly controls the temperature, humidity, molding pressure and time of the mold to prevent cracks and defects inside the product. The molded product needs to be finely dried. Dongtai Hongda adopts a gradually increasing drying process to effectively avoid product cracking caused by thermal shock and ensure the stability of the product in subsequent processes.

Firing and Cooling Process
Firing is a decisive step in the production process of insulating refractory bricks. Dongtai Hongda uses high-temperature tunnel kilns for firing, precisely controlling the firing temperature and holding time, so that the crystal structure inside the product is fully developed and a dense microstructure is formed, thereby significantly improving the thermal resistance and mechanical strength of the product. To ensure the stability of the firing process, the company is equipped with an advanced kiln control system to monitor the temperature and atmosphere changes in the kiln in real time to cope with various possible variables. The fired product needs to be slowly cooled to prevent internal stress caused by rapid cooling, thereby effectively reducing the risk of cracking or deformation of the product.