Crucible is mainly divided into three types of graphite crucible, clay crucible and metal crucible. In order to adapt to the development of social economy, people invented the innovation, expand the scope of its use, such as graphite crucible, silicon carbide crucible, electric furnace crucible, crucible, intermediate frequency furnace isostatic pressing graphite crucible, and so on. GW group, professional build graphite products for 30 years, this article is about the advantages of molten copper graphite crucible:

　　(1) high heat conductivity, by using the high thermal conductivity graphite and other raw materials, shorten the melting time.

　　(2) heat shock, heat shock performance is strong, for thermal shock, not easy to burst;

　　(3) the high heat resistance, high refractoriness, resistant to 1200 ~ 1600 ℃ high temperature;

　　(4) the erosion resistance, strong corrosive against molten soup;

　　The molten copper graphite crucible is now smelting factory and foundry enterprises use most a configuration, it has special properties of solid, not only is only can resist high temperature and hot environment edify, can also is one of the best for heat conduction. In the process of use also is very not easy to deformation, there will not be heated as inflation is probably cold shrink problem. Very well under the environment of alternating use of. And its chemical properties are very stable, is not susceptible to decay and dissolved. Started in on the cold isostatic pressing molding in manufacturing, manufacturing pressure of 600 mpa. Make products internal structure symmetry in good condition, high strength. In the metal industry now, often have higher dissolution results. Its advantage lies in the crucible, and even can probably in low temperature environment, promote the melting of metals. And thus it can be seen, so that the oxidation resistance of the crucible and constant temperature black and white is often high. Is in the process of production, is widely used. And dealing with other products, molten copper graphite crucible without too much pollution, therefore sought by Volkswagen, its market demand also increases gradually.

       Graphite crucible can be widely applicable to smelting of gold and silver, copper, iron, aluminum, zinc, tin, and adapt to the coke, oil, natural gas, electric and other smelting various heating methods. Advanced crucible molding technology of static crucible forming method, this technique make the crucible: volume density, high temperature resistant, heat, acid alkali corrosion resistance, high temperature strength, oxidation resistance of high, save fuel at the same time and reduce the labor intensity of the workers. Products have been widely used in power, metallurgy, oil, fire, chemical, two network transformation and other basic industries and modern engineering facilities.

　　The below is the characteristics of graphite crucible:

　　1. The chemical graphite crucible is used for the natural graphite crucible, which has good thermal conductivity and saves fuel.;

　　2. The operation of the aluminum crucible is convenient, has a good mobility, the environment is very small;

　　3. Aluminum graphite crucible should use natural graphite, good retention of the characteristics of graphite, high temperature, alumina graphite crucible with good heat resistance, can be high temperature 1800 degrees;

　　4. Aluminum graphite crucible surface contains special coating, good corrosion resistance, oxidation resistance;

　　5. The aluminum material of the aluminum graphite crucible pollution is rarely, almost zero.

　　The graphite crucible is widely used in metallurgy, foundry, mechanical, chemical and other industrial departments. It is widely used in smelting and smelting of alloy tool steel and smelting of nonferrous metals and alloys. It has good technical and economic effect.. How are these features reflected?

　　1. The density of the graphite crucible makes the crucible have the best heat conduction, and its heat conduction effect is better than other imported crucible.

　　2. The graphite crucible has a special glaze layer and compact molding material, which greatly improves the corrosion resistance and prolongs its service life.

　　3. Graphite crucible graphite ingredients all of the natural graphite, thermal conductivity is very good. The graphite crucible can not be heated immediately after it is placed on the cold metal desktop, to avoid it caused by a sharp cooling and rupture. A variety of small number of the most suitable for alloy melting crucible. To change the type of the alloy, only the exchange of graphite crucible can be. Other fusion methods like reverberatory furnace and crucible induction furnace melting, suitable for in a large number of single alloy melting, if transform melting alloy type, if not replacing lining refractories, metal pollution.

　　The crucible made of graphite material is called graphite crucible.It has a long history to use the graphite crucible.At first the graphite crucible consists of natural graphite (flake graphite and amorphous graphite) and clay,sand,using the pottery manufacturing process to produce.it used to melt metal(copper,iron,steel etc.)

　　The graphite has a high mechanical strength, refractoriness, Thermal conductivity,could withstand repeated smelting and Erosion of high temperature solution.with the development of modern industry, the development of metal casting in electric furnace makes the natural graphite limited.

　　Since the advent of artificial graphite by the end of nineteenth Century,the artificial graphite crucibles are widely used. High purity fine structure graphite,high strength graphite,glassy carbon material broaden the application range of graphite crucible.the graphite crucibles start to use for precious metals smelting, silver refining, uranium smelting, silicon manufacturing and chemical analysis.

　　Graphite crucible can be classified into natural graphite crucible,artificial graphite crucible,high purity graphite crucible and glassy carbon crucible according to its material classification.it also can be classified into steel melting,copper melting,gold melting and chemical analysis crucibles.

　　The service life of graphite crucible is determined by the material,quality,and the use methed.the graphite crucible is usually need high purity and high density in order to avoid the pollution to the melting metal.

　　The gold melting crucible need high purity and high density,the bulk density need to be >1.80g/cm3,and the ash need to be <50*10-6.the gold melting crucible is usually made of the high purity,high density and fine particle graphite material.

　　The graphite crucible used for uranium extraction is usually big type ones. Φ400mm*700mm and Φ500mm*800mm is widely used.

　　Graphite crucible is also widely used for chemical andlysis,it includes

　　(1) Graphite crucible for sampling before furnacing;

　　(2) Making standard sample.

　　(3) Glassy carbon crucible for chemical analysis.

　　(4) Oxygen analysis