A kind of production method of needle coke

Abstract

The invention discloses a production method of needle coke, which comprises the following steps: S2, taking out the solvent and soft asphalt according to the ratio of 1:1.5-2, mixing them evenly, and separating the light phase and the heavy phase; S3, taking the S1 The heavy phase obtained in the process is heated to 150-200°C, separated from the water in the dehydration tower and then introduced into the tube furnace, heated to 300-360°C by the tube furnace, then introduced into the distillation tower for distillation, and the oil and gas in the distillation pass through the condensation tower After cooling, it becomes light oil, and the distilled asphalt is discharged for later use; S4, prepare coke; S5, take out the coke after cooling, and then crush it to particles with a particle size D50 not greater than 50mm, and mix coke, needle coke, and light oil according to the following weight The ratio of parts is taken out and mixed: 3‑4: 2‑3: 0.5‑1, heated to 150‑180°C during mixing, and stirred for 1‑2 hours; then filtered to retain the solid phase; S6, add Ni‑into the solid phase The Mo-based catalyst is then heated to 300-400° C. and maintained at an air pressure of 10-15Mpa, stirred for 1-2 hours, and taken out to obtain needle coke raw materials; S7, coke the needle coke raw materials.

Description

technical field [0001] The invention relates to needle coke preparation technology, in particular to a production method of needle coke. Background technique [0002] Needle coke is a high-quality variety that is vigorously developed among carbon materials. Its appearance is a silver-gray porous solid with metallic luster. The width ratio is like a fibrous or needle-like texture, and it feels smooth to the touch. It is a raw material for the production of high-end carbon products such as ultra-high-power electrodes, special carbon materials, carbon fibers and their composite materials. According to different production raw materials, needle coke can be divided into oil-based needle coke and coal-based needle coke. Needle coke produced with petroleum residue as raw material is oil-based needle coke; needle coke produced with coal tar pitch and its fractions as raw material is coal-based needle coke. [0003] At present, coal-based needle coke is mainly used in China, but th...

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Problems solved by technology

[0003] At present, coal-based needle coke is mainly used in China, but the preparation process of coal-based needle coke of various manufacturers is classified as confidential or protected by patents, and the production cost is relatively high and the yield is low. Conducive to the current fierce market competition