Product Description

Graphitized Petroleum Coke
Graphitization is the heat treatment of graphite products. Through high temperature, the originally disorganized carbon atoms are arranged neatly. The graphitization process is a process in which the carbon material changes from the two-dimensional structure of the carbon network to the three-dimensional ordered structure through the growth of"microcrystals"under the action of high temperature. Graphitization process is an important process in the production of carbon graphite materials, and graphitization degree is an important index of materials processed.

The graphitization temperature can be roughly divided into two stages, the first stage is between 1000-1800ºC, the second stage is between 1800-3000ºC, above 2000ºC is the key stage for the change of the microcrystalline structure of carbon atoms, different graphite materials have different requirements for graphitization temperature.

Graphitization can be divided into direct method and indirect method according to the heating method, and intermittent and continuous method according to the operation mode. To graphitize the material, it is necessary to use the processing equipment - graphitization furnace.

Graphitization equipment is divided into two categories according to different ways: that is, it is divided into direct heating furnace and indirect heating furnace according to the heating method. The material to be heated in the direct heating furnace is directly used as the heating body. Indirect heating furnace is the material only heating body, heat from the material outside the heating body.

According to the operation design, it can be divided into five main types: Acheson graphitization furnace, internal series graphitization furnace, vacuum graphitization furnace, continuous graphitization furnace and box type graphitization furnace.

Graphitization processing cost is mainly affected by crucible, resistance material and other direct materials, labor costs, depreciation and water, electricity, among which electricity accounts for the highest proportion, about 60% of the graphitization cost. Usually, 1 ton of graphitization capacity needs to consume 12-14,000 KWH of electricity, graphitization is a high energy consumption process.

Graphitization production cycle and construction cycle are long, the general production cycle needs about a month, the construction cycle needs at least half a year to 1 year, so the graphitization capacity release cycle is long.

Due to the low unit electricity price, Inner Mongolia is an important concentration of graphitization capacity in China, accounting for about 46% of the country's total capacity. The remaining capacity is distributed in Sichuan, Shanxi, Yunnan and other regions. Due to the local government's energy consumption control policies, environmental assessment pressure, frequent power rationing and rising electricity costs and other reasons, the release and expansion of graphitization capacity are not as expected, and the operating rate of enterprises is also limited to a certain extent, leading to a larger supply gap and a new high price.