CN103421526A

CN103421526A - Needle coke preparation method

Info

Publication number: CN103421526A
Application number: CN2013103156252A
Authority: CN
Inventors: 张玮; 王松录; 张力强; 郭鹏飞; 徐学卫; 杨涛; 周浩; 刘献华; 岳文琪
Original assignee: 张玮
Priority date: 2013-07-25
Filing date: 2013-07-25
Publication date: 2013-12-04
Anticipated expiration: 2033-07-25
Also published as: CN103421526B

Abstract

The invention provides a high-purity needle coke preparation method which is simple in production technology and lower in cost. Carbon black and coal tar are taken as raw materials, wherein the weight ratio of the coal tar to the carbon black is 1-1.3 to 1; the carbon black and the coal tar are delivered to a stirrer for uniform stirring and then kept for 5-10 minutes under the pressure of 100-150 MPa to form a certain shape; the high-purity needle coke is obtained by calcinating 20-22 hours under 1000-1200 DEG C. According to the invention, the high-purity carbon black extracted from kiln carbon black and the coal tar extracted from coal tar are taken as the raw materials, so that the problem that the ash content of the raw material obtained through a common method is greater is solved, and the produced needle coke has the advantages of high purity, less ash content and the like.

Description

A kind of method for preparing needle coke

Technical field

The invention belongs to a kind of needle coke preparation method, is a kind of method of utilizing carbon black after purification and coal tar to prepare the high purity needle coke specifically.

Background technology

Needle coke is a kind of high quality carbon cellulosic material, and good orientation, electroconductibility, thermal conductivity are arranged.Its greying goods are widely used in the Electric furnace steel making electrode, and nuclear reactor deceleration material reaches the fields such as rocketry.

Along with domestic Graphite Electrodes industry product structure Continuous optimization, ultra-high power graphite electrode proportion constantly increases in recent years, and needle coke demand speedup is obviously accelerated.The same period, because Chinese needle coke manufacturing enterprise quantity is few, the technical foundation weakness, the technology barrier of ubiquity stably manufactured and production quality control aspect, China's needle coke production capacity increasess slowly, needle coke product-feed breach constantly widens, and in the topmost needle coke country of consumption of the whole world, Chinese needle coke strained market supply situation is the most remarkable.

Summary of the invention

The purpose of this invention is to provide a kind of simple, the lower-cost method for preparing the high purity needle coke of production technique.

For achieving the above object, the technique means that the present invention takes is, a kind of method for preparing needle coke is provided, adopting carbon black and coal tar is raw material, wherein the weight ratio of coal tar and carbon black is 1-1.3:1, carbon black and coal tar is sent into to agitator and stir, and then under 100-150MPa pressure, keeps 5-10 minute, make certain shape, under 1000-1200 ℃, calcining gets final product to such an extent that make the high purity needle coke in 20-22 hour.

Preferably, the temperature in above-mentioned agitator remains 150-180 ℃.

In aforesaid method, carbon black used is to carry out sectional sampling chemical examination ash content in generation carbon black De Yao road, then takes ash content to do raw material at the carbon black below 0.3.

In aforesaid method, at first coal tar used adopt the centrifugal settling technology to be purified, and then takes ash content to do raw material at the coal tar below 0.3.

Take the highly purified carbon black that extracts in Cong Yao road carbon black in the present invention and from coal tar purification coal tar do raw material, overcome the larger problem of ash content raw materials used in the usual way, thereby the needle coke of producing has the advantages such as purity is high, ash content is low.

The accompanying drawing explanation

Accompanying drawing 1 is process flow sheet of the present invention.

Embodiment

Embodiment 1

As shown in Figure 1, the coal tar produced in coking is entered to the purification of carrying out coal tar in the centrifugal settling device, purification process carries out under 150-200 ℃, extracts ash content at the coal tar below 0.28; Carry out the sectional sampling chemical examination in carbon black Zai Yao road in the Jiang Yao road, take ash content at the carbon black below 0.28, ash content is stirred in the carbon black below 0.28 joins agitator at the coal tar below 0.28 and ash content, wherein the weight ratio of coal tar and carbon black is 1.1:1, temperature in agitator remains 180 ℃, then under 100MPa pressure, keep 10 minutes, make certain shape, under 1000 ℃ of high temperature, calcining gets final product to such an extent that make the high purity needle coke in 22 hours, and the ash content of the needle coke prepared is below 0.28.

Embodiment 2

As shown in Figure 1, the coal tar produced in coking is entered to the purification of carrying out coal tar in the centrifugal settling device, purification process carries out under 150-200 ℃, extracts ash content at the coal tar below 0.3; Carry out the sectional sampling chemical examination in carbon black Zai Yao road in the Jiang Yao road, take ash content at the carbon black below 0.3, ash content is stirred in the carbon black below 0.3 joins agitator at the coal tar below 0.3 and ash content, wherein the weight ratio of coal tar and carbon black is 1:1, temperature in agitator remains 150 ℃, then under 150MPa pressure, keep 5 minutes, make certain shape, under 1200 ℃ of high temperature, calcining gets final product to such an extent that make the high purity needle coke in 20 hours, and the ash content of the needle coke prepared is below 0.3.

Embodiment 3

As shown in Figure 1, the coal tar produced in coking is entered to the purification of carrying out coal tar in the centrifugal settling device, purification process carries out under 150-200 ℃, extracts ash content at the coal tar below 0.25; Carry out the sectional sampling chemical examination in carbon black Zai Yao road in the Jiang Yao road, take ash content at the carbon black below 0.26, ash content is stirred in the carbon black below 0.26 joins agitator at the coal tar below 0.25 and ash content, wherein the weight ratio of coal tar and carbon black is 1.3:1, temperature in agitator remains 165 ℃, then under 120MPa pressure, keep 8 minutes, make certain shape, under 1100 ℃ of high temperature, calcining gets final product to such an extent that make the high purity needle coke in 21 hours, and the ash content of the needle coke prepared is below 0.26.

Claims

1. a method for preparing needle coke, its feature in, adopting carbon black and coal tar is raw material, wherein the weight ratio of coal tar and carbon black is 1-1.3:1, carbon black and coal tar are sent into to agitator to stir, then keep 5-10 minute under 100-150MPa, make certain shape, under 1000-1200 ℃, calcining gets final product to such an extent that make the high purity needle coke in 20-22 hour.

2. a kind of method for preparing needle coke as claimed in claim 1, its feature in, the temperature in described agitator remains 150-180 ℃.

3. a kind of method for preparing needle coke as claimed in claim 1, its feature is to carry out sectional sampling chemical examination ash content producing in carbon black De Yao road in, carbon black used, then takes ash content to do raw material at the carbon black below 0.3.

4. a kind of method for preparing needle coke as claimed in claim 1, its feature in, at first coal tar used adopt the centrifugal settling technology to be purified, and then takes ash content to do raw material at the coal tar below 0.3.