How is the surface of graphite mold coated?

Generally, the surface of the graphite mold is coated with an antioxidant protective coating, which is both resistant to high temperature and oxidation. This protective coating can reduce the material loss during the steelmaking process by 19% to 50%, and the service life of the material when used will be increased by 20% to 60%, thus reducing the cost of steelmaking. It is a very good mold processing material.

Graphite products have excellent chemical stability, widely used in the manufacture of heat exchangers, reaction tanks, condensers, fire towers, suction towers, freezers, heaters, filters, pumps and other facilities. Due to the special processing of graphite, its corrosion resistance, good electrical conductivity, high permeability.

The equipment is used in alcohol chemical industry, hydrometallurgy, acid and base consumption, fiber decomposition, paper making and other light industry units. Can save a small amount of non-metallic materials. Therefore, graphite can also be used as a vacuum smelting, low-temperature resistance furnace tube, rod, plate, shed and other components of graphite soundproof plate and base.

The basic function of graphite anti-oxidation coating for mold materials is to isolate the graphite material from the oxidation corrosion environment. The main features of the anti-oxidation coating are :1. Greatly reduce the diffusion coefficient of oxygen; 2. Thermal expansion and contraction have good self-healing ability, which can close the cracks generated from the oxidation threshold to the highest use temperature, resist the erosion and penetration of slag, reduce inclusions in steel, and thus produce a pure effect on the molten steel; 3. It can establish a good combination, thermal shock resistance, thermal fatigue resistance and thermal matching between the antioxidant coating and the substrate.

Graphite products have a strong self-smoothing function, but also maintain some of the chemical properties of flake graphite. Because graphite has many high-quality functions, it is widely used in metallurgy, electrical, mechanical, chemical, printing and dyeing, national defense and other light industrial units. Graphite products have been widely used in metallurgy, alcohol chemical industry, chemical industry, aerospace, high-energy cleaning, electronics and other fields. Graphite can be used for consumption or rotation, crucible, continuous melting powder, mold core, mold, detergent and low temperature data, and is closely linked to the coking industry.