Graphite crucible, Graphite bonded silicon carbide crucible, SiC graphite crucible in Smelting industry
Graphite boat
Graphite boat is the most representative category of graphite production and processing. With the continuous completion of its efficacy, the comprehensive use area has been greatly improved.
The high-quality graphite boat is specifically built through high-precision machining equipment and good process flow, thus meeting the diversified requirements of modern production for the graphite boat. Especially in terms of specific size requirements, standardized production processes have been developed, which provides the most powerful guarantee for meeting specific size requirements. The improvement of production technology also largely meets the requirements of modern production for good appearance.
The qualified graphite boat depends on continuous improvement of its material selection requirements and standards. By introducing high-purity graphite materials, the graphite products have low impurity content and excellent comprehensive quality, so as to better meet the requirements of non deformation use under long-term high temperature. It is better to meet the customer's requirements for the use of graphite boat.
Graphite boat ceramic assembly adopts the highest standard ceramics on the market. The imported materials can further improve the comprehensive anti-corrosion performance through the play of auxiliary effects. This makes it not easy to burst, and better delay the comprehensive service life. The service life of the ink boat and the full play of its use effect are closely related to the daily maintenance. The graphite boat itself is special, so the specific maintenance work should be completed as much as possible according to the requirements of the manufacturer of the graphite boat.
1. Storage of graphite boat
The graphite boat with good quality should be stored in a dry and clean environment. The pore structure of high-quality graphite itself makes it have a certain degree of adsorption. The wet or polluted environment will make the cleaned and baked graphite boat easy to be polluted or damped again. Only by ensuring the conformity of the storage environment can we provide the most powerful support for the subsequent guarantee of the use efficiency of the graphite boat.
2. Handle with care
The ceramic and graphite parts of the best-selling graphite boat components all belong to fragile materials. In the process of handling or use, collision shall be avoided as far as possible;. If the components are found to be broken, cracked, loose, etc., they should be replaced and locked again in time.
3. To achieve matching maintenance of auxiliary parts
During the maintenance of the graphite boat, it is suggested that the components, boat pieces and process cards should be provided by the supplier of the graphite boat. This can avoid the damage caused during the replacement process due to the failure of the component accuracy to match the original boat.
4. To do a good numbering management as far as possible
In applications, the graphite boat shall be numbered and managed as much as possible, as well as design and make regular cleaning, drying, maintenance and inspection. It will ensure good management on graphite boat and stability on its application. The integrally cleaned graphite boat shall replace the ceramic components regularly. It plays an important role in the orderly maintenance of the graphite boat.
In order to better ensure the improvement of the use efficiency of the graphite boat, better reduce the maintenance cost, timely carry out maintenance in daily use, and carry out systematic planning and system according to relevant processes.
Graphite crucible
High purity graphite crucible is widely used in metallurgical industry. Its main function is to put all kinds of liquid metals.
1. The high-purity graphite crucible is easy to get damp. The crucible will become soft after being affected with moisture. When some objects with impact force strike, the wet crucible will deform. Once the water enters the high-purity graphite crucible, it will affect the raw materials contained in it, which will cause dilution of the raw materials, and some chemical reactions will also occur to further affect its quality. Therefore, waterproof measures must be taken.
2. The high-purity graphite crucible has high quality, which is not easy to be damaged. However, it should be handled with care. Falling from high altitude or bumping has little effect on the quality of graphite crucible. However, if the process continues for a long time, cracks will appear. After this happens, there is no way to remedy it, so we have to replace it.
3. The high-purity graphite crucible must not be heated on an open flame. The thermal conductivity of the high-purity graphite crucible itself is not particularly sufficient. It is meaningless to heat it on the top. Meanwhile, it is not beautiful to use smoke and fire to bake or to make the bottom of it appear scorched. High-purity graphite crucible has good thermal conductivity and high temperature resistance. Under the high temperature, the coefficient of thermal expansion is small. The high-purity graphite crucible has certain strain resistance to rapid heating and cooling, strong corrosion resistance to acid and alkali solvents, and good chemical stability. High-purity graphite crucible is widely used. It is mainly used for smelting various non-ferrous metals such as silver, aluminum, lead, copper, zinc, medium carbon steel and rare metals. The high-purity graphite crucible has stable quality, and long service life, which greatly reduces fuel consumption and labor intensity, improved labor intensity, and creates better economic benefits.
Crucibles can be divided into graphite crucibles, clay crucibles and metal crucibles. Graphite crucibles are divided into ordinary graphite crucibles, special-shaped graphite crucibles and high-purity graphite crucibles. Due to different properties, applications and service conditions, raw materials, production methods, process technologies and product models and specifications used by various types of graphite crucibles are also different. The main raw material of graphite crucible is crystalline natural graphite. Therefore, it maintains the original physical and chemical properties of natural graphite.
In another words, it has good thermal conductivity and high temperature resistance. Under the high temperature, the coefficient of thermal expansion is small. The high-purity graphite crucible has certain strain resistance to rapid heating and cooling, strong corrosion resistance to acid and alkali solvents, and good chemical stability.
Crucibles have various sizes, which have no limitation of production scale, batch size, and types of smelting materials in application. The clients can select the crucibles freely. Depending on its strong applicability, the crucibles can ensure the purity of material to be smelted.
Depending on above excellent properties, graphite crucibles are widely used in metallurgy, casting, machinery, chemical industry and other industrial sectors for smelting alloy tool steel and smelting non-ferrous metals and their alloys. At present, it has good technical and economic effects. Crucibles are generally divided into three categories:
1) copper smelting crucible: its specification is “No.”.
2) copper alloy crucible: 100 No., for special round shape and 100 No., for round shape;
3) crucible for steelmaking: 100 No.;
There are three formation methods for crucibles.
1) hand molding: primitive and ancient molding method
2) rotational molding
3) compression molding
The high density of graphite crucible makes the crucible have good thermal conductivity. Its heat conduction effect is obviously superior to other imported crucibles. The graphite crucible has a special glaze layer and dense molding materials, which greatly improves the corrosion resistance of the product and extends its service life.
The graphite in the graphite crucible is made of natural graphite, with excellent thermal conductivity. After heating, the graphite crucible cannot be placed on the cold metal table immediately to prevent it from cracking due to rapid cooling.
1. Thermal stability
The graphite crucible is specially designed to ensure the reliability of product quality according to the service conditions of rapid heating and cooling.
2. Corrosion resistance
The uniform and fine matrix design delays the erosion of the crucible.
3. Impact resistance
Graphite crucible can withstand extremely high thermal shock strength. Thus, any process treatment can be carried out with confidence.
4. Acid resistance
The addition of special materials can significantly improve the quality of the crucible. Then, it shows outstanding acid resistance indicators and greatly extends the service life of the graphite crucible.
5. High thermal conductivity
The high content of fixed carbon ensures good thermal conductivity, shortens the dissolution time, and significantly reduces fuel consumption or other energy consumption.
6. Control of metal pollution
The strict control of material composition ensures that the graphite crucible does not pollute the metal during dissolution.
7. Stable quality
The manufacturing technology and quality of high-pressure forming can ensure the system and the stability of quality.
