گرافیت چرب نقره ای 80-85 درصد
گرافیت چرب 97 درصد
مش 800 یا میکرومتر 18
گرافیت چرب 90 درصد
مش 325 یا میکرومتر 43
Fatty graphite is a crystalline structure, semi-metal and one of the 3 allotropes of carbon. The maximum range of use of graphite is in steel and cast iron production industries, and it can be said that carbon is an inseparable member of the structure of steel and cast iron, which will induce different properties to these materials with any percentage in the melt of cast iron and steel. The use of fatty graphite in the metallurgical industry has a very wide range, which can be used for such things as:
Increasing the hardness of steel by adding graphite
Production of metallurgical industrial electrodes with petroleum coke press
Regeneration of steel and metal oxides using carbon oxidation in the form of metallurgical coke, thermal coal, coke, graphite and
It is a conductor of electric current and is the most stable form of carbon under standard conditions. Graphite has the highest natural strength and hardness, is rustproof and heat resistant, has high natural lubricity and high heat resistance up to 4500 degrees Fahrenheit (2480 degrees Celsius), is electrically and thermally conductive, has chemical stability, and is resistant to radiation. (beam), low friction and high compressive strength are also among its other features
Graphite surfaces, greasy graphite
Graphite has many uses, including
By combining fatty graphite with a solvent, it can be used as a coating for the casting mold, and it can also be used to clean the mold. Graphite is also used to make casting crucibles.
Forge and greasy graphite industries
Choosing the right lubricant for the mold is one of the most important and effective factors in the successful forging process. Maximizing the lifetime of the mold, preventing the parts from sticking to the mold is part of the benefits and application of liquid graphite.
Fatty graphite is one of the main components of oils such as grease, etc. This substance creates a thin layer on the applied surface with the combination of oil and thus reduces friction.
Brake and clutch pads
Fatty graphite is also used in the production of brake and clutch pads, and its use in this industry has increased in recent years.
Fatty graphite and dry graphite have high covering power and expansion, and when used in paint, its layers are placed parallel to the surface and become very resistant to water penetration. Also, graphite strongly adheres to the metals located on the painted surfaces and as a result increases the adhesion of the paint to the surface. Graphite is used in the manufacture of repair paints for steel skeletons and primary linings that prevent corrosion, which is often used in the second application. It is mixed with red lead.
In electronic devices and especially in electric typewriters, the use of graphite mineral is very evident. And in the manufacture of mobile phone parts and electric cars from graphite, fatty graphite is used due to its high conductivity.
The word graphite comes from the Greek language, which means "writing". Therefore, the most common use of fatty graphite is in making pencils.
Fatty graphite is widely used due to its high heat tolerance and invariability and high thermal resistance, in general, when a refractory material is needed in the vicinity of high heat.
Types of graphite
There are three main types of natural graphite, each of which is found in different types of deposits:
The mineral graphite is a mass of carbon. Named in 1789 by Abraham Gottlob Werner of Ancient Greece (diagram), "to draw/write". . Unlike diamond (another allitrope of carbon), graphite is an electrical conductor, making it a semi-solid. Graphite is the most stable form of carbon under standard conditions. As a result, it is used in thermochemistry as a standard mode to determine the heat of formation of carbon compounds. Graphite may be the highest grade of coal, just above anthracite and instead called meta-anthracite, although it is not commonly used as a fuel because it is difficult to ignite.
Vienna graphite is considered the rarest, most valuable and highest quality natural graphite. It consists of direct deposition of solid graphite and graphitic carbon from high-temperature subsurface fluids.
The grade of Vienna graphite is usually above 90% Cg, with a purity of 95-99% unrefined carbon.
Vienna graphite has higher thermal and electrical conductivity and also has the highest degree of cohesive cohesion among all natural graphites. Vienna graphite is easily molded and formed into solid shapes without the aid of an additional bond, resulting in significant cost savings over lower grade raw materials. Sri Lanka is the only jurisdiction that currently produces vein graphite. Due to the carbon content typically found with bulk/vein graphite, recovery operations and costs will typically be lower than flake or amorphous graphite recovery. Bulk graphite processing techniques include everything from hand sorting of large concentrated samples to standard crushing, grinding, floor floating and milling. Bulk/vein graphite is suitable for many of the same applications as flake graphite and has a clear competitive edge in terms of market price and product applications.
Lump vs. Flake
Although flake and mass have similar crystal structures, their differences occur in the range of natural grades, or the percentage of carbon (% C) in the ore body. Shell grades are typically between 2-10°C, while massifs like those found in Sri Lanka are easily over 80%°C. Amorphous degrees are usually between 15 and 30 degrees Celsius.
This range of grades