Petroleum coke is a product obtained by separating light and heavy crude oil through distillation and thermal cracking of heavy crude oil. In appearance, coke is black blocks (or particles) of irregular shape and varying sizes with a metallic luster. Coke particles have a porous structure. The main element composition is carbon, which accounts for more than 80%, and contains 1.5%-8% hydrogen. The rest are oxygen, nitrogen, sulfur and metal elements.

Properties of Petroleum Coke

Petroleum coke grinding machine equipment and process flow

From the appearance, petroleum coke is irregular in shape, black blocks (or particles) of varying sizes, with metallic luster, porous structure of particles, the main element composition is carbon, relative density 0.9-1.1, combined with material characteristics, the main equipment is generally selected Raymond mill, except for the size of the masterbatch, and then the equipment performance, output, etc., as well as whether there are special quality requirements. The common petroleum coke grinding process is as follows

Petroleum coke mill

As the main equipment of the grinding production line, it has a three-dimensional structure, small footprint, strong set-up, and an independent production system from block materials to finished powder. The workshop can basically realize unmanned operation with high efficiency. The finished fine powder is of good quality, uniform, high sorting accuracy, higher screening rate, and the fineness can be adjusted according to demand.

Petroleum coke production process

Raw material warehouse → bucket elevator → jaw crusher → Raymond mill → electromagnetic vibrating feeder → analyzer → powder collector → pipeline device → dust collector → power distribution cabinet → finished product warehouse, etc.

Crushing system:

Before pre-calcining the raw coke, the raw coke needs to be pre-crushed to within 40mm, and then crushed again after coarse screening. Some petroleum coke manufacturers do not screen before coarse crushing, so that the smaller pieces that meet the requirements and the large pieces of petroleum coke directly enter the crusher together, and the small pieces of raw coke are crushed again, making the raw materials finer.

Grinding system:

The material is fed into the Raymond mill for grinding, and the finished product passes through the powder selector, enters the cyclone powder collector and pulse dust collector for collection, and is fed into the blower from the lower discharge port;

Finished product conveying system:

The blower outlet is equipped with a pneumatic conveying system to transport the finished product to the finished product warehouse, and the excess gas is filtered by the dust collector on the top of the warehouse;

Dust removal system:

The whole system is equipped with three pulse dust collectors, and exhaust ports are installed at all dust-raising points to ensure that there is no dust leakage in the whole system and dust-free operation is achieved on site.

Control system:

This system is equipped with an intelligent PLC control cabinet and a host computer, which has the start/stop, monitoring, and interlocking functions of all equipment in the whole system, and a DNS interface is reserved to achieve remote control.

What are the uses of petroleum coke?

The largest user of petroleum coke is the cement industry, which consumes about 40% of the petroleum coke market share.

Depending on its quality, petroleum coke can be used in industries such as graphite making, smelting and chemical industry.

Low-sulfur, better-quality cooked coke, such as needle coke, is used to make high-power graphite electrodes and certain special carbon products. In the steelmaking industry, needle coke is an important material for developing new technologies for electric furnace steelmaking.

Medium-sulfur, ordinary cooked coke is used in large quantities for aluminum smelting.

High-sulfur, ordinary raw coke is used in chemical production, such as the manufacture of calcium carbide, silicon carbide, etc., and as a fuel for metal casting, etc.