Refractories-Crucible | Flake Graphite

After natural flake graphite is mined and floated, some graphite raw materials and primary processed graphite products are formed. If natural flake graphite wants to develop in a wider and deeper field.

Flake graphite is widely used in advanced refractories and coatings in the metallurgy industry. Like a crucible. The crucible is an important part of a chemical instrument. It is a container for melting and refining metal liquids and solid-liquid heating and reaction, and is the basis for ensuring the smooth progress of chemical reactions.

Graphite products made by flake graphite

Graphite crucible is made of natural flake graphite as the main raw material and plastic refractory clay or carbon as binder. It has the characteristics of high temperature resistance, strong thermal conductivity, good corrosion resistance and long service life. In the process of high temperature use, the coefficient of thermal expansion is small, and it has certain strain resistance to rapid cooling and rapid heating. It has strong corrosion resistance with acidic and alkaline solutions, has excellent chemical stability, and does not participate in any chemical reactions during the smelting process. The inner wall of the graphite crucible is smooth, and the melted metal liquid is not easy to leak and adhere to the inner wall of the crucible, so that the metal liquid has good fluidity and castability, and is suitable for various mold casting. Due to the above excellent characteristics, graphite crucibles are widely used in the smelting of alloy tool steel and non-ferrous metals and their alloys.

Application of flake graphite in refractories

Graphite crucible is an advanced refractory material made of natural flake graphite, wax stone, silicon carbide and other raw materials. It is used for smelting and casting copper, aluminum, zinc, lead, gold, silver and various rare metals. Natural flake graphite is the main raw material, and clay and other refractory raw materials are added, which are generally called clay graphite crucibles, and pitches with pitch as the binder are used as carbon binder crucibles, and crucibles made only by the sintering force of clay are called marker clays Binder crucible, with excellent strength and thermal shock resistance, is used for smelting steel, copper, copper alloy, etc., and various rare metals.

Crucible products made of natural flake graphite include crucibles, stoppers, retort nozzles, etc., which have the characteristics of low thermal expansion and good data stability.

Natural flake graphite exhibits fire resistance in the process of metal smelting, graphite crucible products have good thermal shock stability and excellent thermal conductivity at high temperatures, and are also very stable when infiltrated and washed by metals, so graphite crucibles and related products It is widely used in direct molten metal processing.

Features of graphite crucibles

1. The high density of the graphite crucible makes the crucible have the best thermal conductivity, and its thermal conductivity is obviously better than other imported crucibles;

2. The exterior of the graphite crucible has a special glaze layer and dense molding materials, which greatly improves the corrosion resistance of the product and prolongs its service life;

3. The graphite components in the graphite crucible are all made of natural graphite, which has very good thermal conductivity. Do not place the graphite crucible on a cold metal table immediately after heating to avoid it from cracking due to rapid cooling.

Most of the graphite crucibles currently produced in my country are made of natural flake graphite, which has a small thermal expansion coefficient during high temperature use and has a certain strain resistance to rapid cooling and rapid heating. The inner wall of the crucible made of natural flake graphite is smooth, and the melted metal liquid is not easy to leak and adhere to the inner wall of the crucible, so that the metal liquid has good fluidity and castability, and is suitable for casting of various molds.