The difference between vacuum graphitization furnace and continuous graphitization furnace

Vacuum graphitizing furnace

There are many expressions of graphitization. Simply put, graphitization is heat treatment. So that the carbon atoms, which used to be in a mess, are aligned. It is worth noting that graphitization is a key technical link in the industrial production process, whether it is a large isotropic graphite, or a small size of brushes, conductive sliders, and even a series of carbon-graphite products such as lithium-ion battery anode materials.

According to the operation design, it can be divided into two main types: vacuum graphitization furnace and continuous graphitization furnace.

Vacuum graphitization furnace is a small and medium-sized graphitization furnace for high temperature treatment of materials in the "vacuum" environment. It is generally used in laboratories or small batch production devices. It adopts the form of resistance heating and the temperature can reach 3000℃. And good temperature uniformity; Special high temperature infrared measurement technology, accurate temperature control, small error; External circulation cooling system, single furnace production cycle is short, high efficiency. It is used in the high-temperature treatment and graphitization of carbon structural parts (products), C/C composite products, graphene, carbon fiber products, sintered graphitization of carbon fiber filament and other materials that can be sintered and smelted in carbon environment.

Continuous graphitization furnace

Continuous graphitization furnace is not a specific graphitization process furnace, the existing continuous graphitization furnace has a variety of forms. The so-called continuous graphitization process is relative to the intermittent graphitization process. The so-called continuous graphitization process generally refers to the process without power failure in the production. The graphitized products need to go through a series of temperature zones, so as to achieve continuous graphitization.

Continuous graphitization furnace also has another form, similar to the internal series graphitization method, electrodes in the furnace end to end, series connected into electrode column, current directly through the electrode column to produce Joule heat, so as to achieve graphitization.

The furnace that produces graphitized products in continuous production mode has many advantages compared with the intermittent graphitized furnace, such as reducing heavy manual labor, convenient to realize mechanization and continuous operation; Improve product quality and uniform heat treatment; Reduce the number of handling products, edge off Angle phenomenon can be greatly reduced; Improve working conditions and facilitate smoke removal and dust removal; Reduce the consumption of insulation material, one add can be sealed.

Carbon tube furnace is a kind of small continuous graphitization furnace with external heating. It mainly adopts the principle of thermal purification and is used for the high temperature purification of graphite. The principle of thermal purification is mainly used for graphite purification at high temperature.

The continuous graphitization furnace body is a vertical cuboid shell. It adopts direct current electricity and two electrodes are distributed on the left and right. When the current generated by the voltage between the two electrodes passes through the material, the material converts the electric energy into heat energy due to its own resistance, and the material is gradually heated and calcined. As the material moves down, the material is gradually heated to 2500 ~ 3000℃ for high temperature graphitization, and the lattice transformation of carbon atoms occurs, becoming high purity graphitized coke. Graphitized coke gradually moves down and is discharged by discharging equipment after cooling.