Magnesia chrome brick manufacturers tell you the difference between directly bonded magnesia chrome brick and re bonded magnesia chrome brick

Among refractories, magnesia chrome bricks and reconstituted magnesia chrome bricks are widely used in metallurgy, chemical industry and other fields as important materials. Although they are all magnesia chrome refractories, there are significant differences between them. This paper will list these differences, and discuss their basic properties, production technology, application fields and so on.

2、 Basic properties

1. Physical properties

The physical properties of magnesia chrome brick and reconstituted magnesia chrome brick are also different. Magnesium chrome bricks have high compressive strength and tensile strength, can withstand large pressure and tensile force, and are not easy to crack or deform. The physical properties of the reconstituted magnesia chrome brick are more superior, and its compressive strength and tensile strength are higher than those of magnesia chrome brick, which can withstand greater pressure and tension. In addition, its coefficient of linear expansion is also very low, which can effectively avoid the crack and burst caused by temperature change.

2. Chemical properties

There are also obvious differences in chemical properties between magnesia chrome bricks and reconstituted magnesia chrome bricks. The main components of magnesia chrome brick are magnesium oxide, chromium oxide, etc., which have stable chemical composition, good corrosion resistance, oxidation resistance and other properties, and can maintain good durability in high temperature environment. At the same time, it can also resist acid and alkaline chemical corrosion. Compared with the re bonded magnesia chrome brick, a certain amount of microcrystalline oxide is added, which can make its chemical composition more stable and can be used in more extreme chemical environment for a long time.

3. Fire resistance

The fire resistance of magnesia chrome brick and reconstituted magnesia chrome brick are also different. Magnesia chrome bricks can be used in high temperature environment above 1500 ℃ for a long time without softening, melting and other problems. Combined magnesia chrome brick is more superior, which can be used in high temperature environment above 1700 ℃ for a long time, and has higher heat resistance and fire resistance.

4. Thermal stability

There are also differences in thermal stability between magnesia chrome bricks and reconstituted magnesia chrome bricks. The thermal stability of magnesia chrome brick is very good, that is, its chemical and physical properties will not change significantly under certain pressure and impact force at high temperature. The re bonded magnesia chrome brick is more stable and can maintain better physical and chemical properties at higher temperatures.

5. Impermeability

There are also differences in anti-seepage performance between magnesia chrome brick and reconstituted magnesia chrome brick. Magnesia chrome brick has good closed hole performance, which can effectively prevent the penetration and erosion of slag and metal liquid, thus improving the service life and operation efficiency of the equipment. Combined with magnesia chrome brick, the anti-seepage effect is further improved. It can operate stably for a long time under high temperature and high pressure, acidic or alkaline conditions, and is more suitable for complex industrial environments.

3、 Production process

The production process of magnesia chrome brick and reconstituted magnesia chrome brick is also different. In terms of the selection of raw materials, magnesium chrome bricks have higher requirements than magnesium chrome bricks, so it is necessary to select higher quality raw materials. In terms of production process, the production process of magnesium chromium brick is more complex, and higher-level production process is required, including finer grinding, higher pressure forming and longer firing time.

4、 Application fields

There are also great differences between magnesia chrome bricks and reconstituted magnesia chrome bricks in application fields. Magnesia chrome bricks are mainly used in the metallurgical industry, and are mainly used in the manufacture of high-temperature equipment such as aluminum oxide electrolytic cell and molten steel ladle. The combined magnesia chrome brick has been applied in a wider range of fields, including petroleum, chemical, electric power and other industries, and its uses are more diversified.

5、 Development trend

With the continuous development of the industrial field, the performance and quality requirements of refractories are becoming higher and higher. Combined with the appearance of magnesia chrome brick, it marks a major breakthrough in the performance and application fields of magnesia chrome brick. In the future, with the continuous emergence and application of high-tech and new materials, the performance and quality of magnesium chromium brick will be further improved and improved, and its application range will also be continuously expanded and extended.

In a word, although both magnesia chrome bricks and reconstituted magnesia chrome bricks belong to magnesia chrome series of refractories, they are obviously different in basic properties, production process, application fields, etc. In the future, with the continuous improvement of technology and the continuous change of market demand, these two materials will also continue to develop and evolve to adapt to a wider range of application fields and market demand.