What's the performance and production process of a non burned magnesia chrome brick?

Non-burned magnesia chrome bricks, also known as unfired magnesia chrome bricks or chemically bonded magnesia chrome bricks, are a type of refractory brick that is not fired at high temperatures like traditional fired bricks. Instead, they are chemically bonded using various binders and additives. Here's an overview of the performance and production process of non-burned magnesia chrome bricks:

Performance:

1、High Temperature Performance: Non-burned magnesia chrome bricks exhibit excellent performance at high temperatures, typically up to 1700°C (3092°F). They have good thermal stability and can withstand thermal shock and fluctuations in temperature.

2、Corrosion Resistance: These bricks have strong resistance to chemical attack from slags, alkalis, and acidic environments. The combination of magnesia (MgO) and chrome oxide (Cr2O3) provides superior corrosion resistance.

3、Mechanical Strength: Non-burned magnesia chrome bricks have good mechanical strength, ensuring structural integrity under load and reducing the risk of spalling or cracking.

4、Application Range: They are commonly used in industries such as steelmaking, cement manufacturing, non-ferrous metal refining, and petrochemical processes. Specific applications include electric arc furnaces, ladle linings, tundish lining, and rotary kilns.

Production Process:

1、Raw Material Preparation: The raw materials used in non-burned magnesia chrome bricks include magnesia, chrome ore, and various binders and additives. The magnesia and chrome ore are finely ground to achieve the desired particle size distribution.

2、Mixing: The ground magnesia and chrome ore are mixed with binders and additives, such as organic resins or chemical bonding agents, in a specific ratio. This mixture forms a plastic mass that can be shaped or molded into the desired brick dimensions.

3、Shaping: The plastic mass is shaped into bricks using various techniques such as pressing, extrusion, or casting. The shaping process ensures the desired brick shape and dimensions are achieved.

4、Drying: The formed bricks undergo a drying process where moisture is removed gradually to prevent cracking or deformation. Slow and controlled drying is crucial to maintain the integrity of the unfired bricks.

5、Curing: After drying, the bricks go through a curing process to allow the chemical bonding agents to cure and harden, resulting in the final strength and integrity of the product.

Testing and Quality Control: The non-burned magnesia chrome bricks undergo rigorous testing to ensure they meet the required specifications for composition, physical properties, and performance characteristics. This includes testing for compressive strength, corrosion resistance, thermal shock resistance, and other relevant parameters.

It's worth noting that the production processes may vary among manufacturers, and different additives or binders can be used depending on specific requirements. Therefore, it is important to consult the manufacturer's specifications and technical data sheets for detailed information on the performance and production process of a particular non-burned magnesia chrome brick.