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Different types of graphite processing and how to improve bulk density

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Different types of graphite processing and how to improve bulk density

Date of release:2018-06-26 Author:Qingdao xingrunda sealing materials co. LTD Click:

Graphite is used in a wide range of applications, including firebrick, crucible, continuous casting powder, mold core, mold casting, detergent and high temperature resistant materials. Because graphite products have many excellent properties, they are widely used in metallurgy, machinery, electric, chemical, textile, national defense and other industrial sectors.


Graphite products should be maintained in these aspects:


1.To prevent the side and bottom lead of the graphite products directly sprayed by the strong corrosion flame;


2. In the process of application, turn graphite products once a week to extend the life of graphite products;


3. The use of appropriate fuel additives and additives will reduce the life of graphite products;


4. The graphite products should be kept at an appropriate distance from the furnace wall, and the graphite products should be placed in the center of the furnace;


5. When removing the surface wall slag and coking of graphite products, tap lightly to prevent the damage of graphite products;


6. Handle with care, avoid shock;


7. Graphite products are strictly moisture-proof and must be stored in a dry place or on a wooden frame;


8. The specification number of graphite products is the capacity of copper;


9. Hot baking is required in the drying equipment or by the furnace before application, and the temperature gradually rises to 500 degrees Celsius;


Graphite products have good lubricity and abrasion resistance, high temperature resistance, self-lubricating and chemical corrosion resistance. Today, we will introduce different types of processing of graphite products:


 Graphene manufacturers

  1.The processing of graphite anode mainly USES petroleum coke as the raw material and coal tar asphalt as the binder, which is made by calcination, batching, mixing, pressing, roasting, impregnation, graphitization and machine processing. It is commonly used as a conductive anode for electrolytic equipment in electrochemical industry.


2, graphite electrode, graphite products processing mainly petroleum coke, needle coke as raw material, coal pitch as binder, calcination, ingredients, kneading, molding, baking and graphitization, machining and made, which is released in electric arc furnace in the form of arc conductor of electricity to heat melting furnace charge, according to its quality indicators, can be divided into ordinary power, high power and high power.


3. The processing of special graphite products mainly takes high-quality petroleum coke as the raw material, and coal tar pitch or synthetic resin as the binder, which is made from raw materials preparation, ingredients, mixing, kneading, crushing, re-mixing, molding, repeated roasting, repeated impregnation, purification, graphitization and machine processing. It is commonly used in aerospace, electronics and nuclear industries.


1.Increase the bulk density of roasting and roasting products


The coking value is related to the atmosphere in the roasting system. Because the decomposition of the binder and the porosity of the product are far less than that of the filler, the gas concentration gradient between the product and the filler is caused. The higher the gradient, the greater the gas diffusion rate in the product, which will increase the gas decomposition in the product and reduce the coke value. In order to obtain a large coke forming value, the permeability of the filler should not be too large. Pressure roasting is very effective to increase the bulk density of products.


2. A roasting process can increase the density of the product and increase the volume shrinkage to increase the density of the product


The weight loss of roasting product after graphitization is about 2.6%. To increase the bulk density of roasting product in the graphene chemical sequence, it is necessary to increase the volume shrinkage. Using special resin as binder can increase the shrinkage of the product in roasting and graphite chemical sequence. Reduce the temperature increase rate of the product in the range of 1400~2100 degrees. You can also get the effect of increasing gross contraction.


To control the density of final product, the density of raw product must be measured and controlled. It can be seen that too much binding dose is unfavorable for the bulk density of the product, because 40% of the weight of the binder is released by volatile matter in the roasting process. However, it has also been proved in practice that, with too few adhesive, many pores will appear in the raw products, and the density of the body will be reduced and other performance indicators will be affected.


3. Increase volume shrinkage to increase body density


The weight loss of roasting product after graphitization is about 2.6%. To increase the bulk density of roasting product in the graphene chemical sequence, it is necessary to increase the volume shrinkage. Using special resin as binder can increase the shrinkage of the product in roasting and graphite chemical sequence. Reduce the temperature increase rate of the product in the range of 1400~2100 degrees. You can also get the effect of increasing gross contraction.


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Key word:Graphenemanufacturers,Qingdaographenemanufacturer,Agoodmanufacturerofgraphene

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