CN111392708A - Organic-weight-ratio petroleum coke and preparation method of calcined petroleum coke - Google Patents

Abstract

The invention belongs to the field of calcined coke production, and particularly relates to petroleum coke with an organic weight ratio and a preparation method of calcined coke thereof; the calcined coke comprises the following raw materials: low sulfur coke and high sulfur coke; the applicant obtains a new production process of calcined coke through multiple creative tests, the production process adopts low-sulfur coke and high-sulfur coke with organic weight ratio, and the use of ultra-low-sulfur coke is abandoned, and the calcined coke obtained by the production process has the sulfur content of 3% and the average resistivity of 600 mu omega m on the basis of saving cost.

Description

Organic-weight-ratio petroleum coke and preparation method of calcined petroleum coke

The technical field is as follows:

the invention relates to the field of calcined coke production, in particular to petroleum coke with an organic weight ratio and a preparation method of calcined coke thereof.

Background art:

the main application field of the calcined coke in China is electrolytic aluminum industry, which accounts for more than 65% of the consumption of the whole calcined coke, and then the calcined coke is used as a fuel in the industries of carbon, industrial silicon and other smelting industries, mainly cement, power generation, glass and the like, and occupies a small proportion.

The petroleum coke is called green coke and contains some volatile components of non-carbonized hydrocarbon, the calcination of the petroleum coke is an important process in the carbon production process, the calcination is carried out at high temperature under the condition of air isolation, the volatile components and moisture in the raw materials are removed, the structures and the element compositions of various carbonaceous raw materials are changed in a series of depths in the calcination process, the physical and chemical properties of the various carbonaceous raw materials are improved, and the calcined coke is further obtained. The calcined coke is mainly used for producing an anode carbon block and a cathode for electrolytic aluminum, and a carbon increasing agent, a graphite electrode, an electrode for industrial silicon, yellow phosphorus and titanium alloy for the metallurgical steel industry. The application is more common that: the product can be used as regenerated graphite material, anode additive, additive in steel industry, and can be used as coating, covering, and conducting after being crushed. However, the existing calcined coke production process has the disadvantages of poor product quality and high production cost due to the insufficient calcination, high resistivity of the calcined coke product, high residual sulfur content and low calcined coke recovery rate.

The invention content is as follows:

based on the reasons, the applicant obtains a new production process of calcined coke through multiple creative tests, the production process adopts low-sulfur coke and high-sulfur coke with organic weight ratio, the use of ultra-low-sulfur coke is abandoned, the calcined coke obtained by the production process has the sulfur content of 3 percent and the average resistivity of 600 mu omega m on the basis of saving cost.

The invention is realized by the following technical scheme.

A preparation method of calcined coke comprises the following raw materials: low sulfur coke and high sulfur coke.

Wherein the sulfur content of the low-sulfur coke is 1.5 to 2.0 percent.

Wherein the content of the high sulfur coke is 3.8 to 4.5 percent.

Wherein the weight ratio of the low-sulfur coke to the high-sulfur coke is 0.8-1.2: 0.8-1.2.

Wherein the weight ratio of the low-sulfur coke to the high-sulfur coke is 1: 1.

The preparation method of the calcined coke comprises the following steps:

(1) taking the petroleum coke and crushing;

(2) adding the calcined coke into a calcining furnace, calcining at 1200-1300 ℃ under the condition of air isolation, and controlling the number-dividing negative pressure of each flame path of the calcining furnace at 80-100 Pa to obtain calcined coke.

The petroleum coke used in the invention can be divided into three categories of high-sulfur coke (the sulfur content is 3.8-4.5% and is represented by Suideae and Tahe), low-sulfur coke (the sulfur content is 1.5-2.0% and is represented by Yumen and Wupetrochemical 3A and the low sulfur of the Suideae) and ultra-low-sulfur coke (the sulfur content is less than 1.5% in China standard, Kepetrochemical and Zhoushan).

The invention has the following beneficial effects:

1. the production cost of calcined coke is further reduced, and after the petroleum coke blending process is optimized, the cost of calcined coke produced by only adopting the ratio of low-sulfur coke and high-sulfur coke is 84 yuan/ton lower than that of calcined coke produced by the ratio of ultra-sulfur coke and high-sulfur coke, and the effect is considerable all the year round.

2. The daily production mainly uses low-sulfur coke matched with high-sulfur coke, and the proportion influence on the production caused by the large change of the production formula is avoided.

3. A great deal of purchasing is concentrated on low-sulfur coke and high-sulfur coke with obvious production cost effect, and the advantage of large purchasing amount is utilized to strive for preferential purchasing price for petrochemical manufacturers. Meanwhile, the purchase of the ultralow-sulfur petroleum coke with poor cost performance is reduced as much as possible, and the purchase fund is saved.

4. The physical and chemical indexes of the furnace top material (mixed petroleum coke) are more stable, and powerful guarantee is provided for the stable operation of the calcining furnace

Detailed Description

In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easily understood, the invention is further explained with the following embodiments, but the following embodiments are only the preferred embodiments of the invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention.

The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.

Preparation examples:

example 1

The calcined coke is prepared from the following raw materials: the weight ratio of the low-sulfur coke to the high-sulfur coke is 2: 3, the sulfur content of the low-sulfur coke is 1.5 to 2.0 percent, and the sulfur content of the high-sulfur coke is 3.8 to 4.5 percent.

The preparation method of the calcined coke comprises the following steps:

(1) taking the petroleum coke and crushing;

(2) adding the calcined coke into a calcining furnace, calcining at 1200-1300 ℃ under the condition of air isolation, and controlling the number-dividing negative pressure of each flame path of the calcining furnace at 80-100 Pa to obtain calcined coke.

The sulfur content of calcined coke prepared by the method reaches 3%, and the average resistivity value is 600 mu omega m.

Example 2

The calcined coke is prepared from the following raw materials: the weight ratio of the low-sulfur coke to the high-sulfur coke is 3: 2, the sulfur content of the low-sulfur coke is 1.5 to 2.0 percent, and the sulfur content of the high-sulfur coke is 3.8 to 4.5 percent.

The preparation method of the calcined coke comprises the following steps:

(1) taking the petroleum coke and crushing;

(2) adding the calcined coke into a calcining furnace, calcining at 1200-1300 ℃ under the condition of air isolation, and controlling the number-dividing negative pressure of each flame path of the calcining furnace at 80-100 Pa to obtain calcined coke.

The sulfur content of calcined coke prepared by the method reaches 3%, and the average resistivity value is 600 mu omega m.

Example 3

The calcined coke is prepared from the following raw materials: the weight ratio of the low-sulfur coke to the high-sulfur coke is 1:1, the sulfur content of the low-sulfur coke is 1.5 to 2.0 percent, and the sulfur content of the high-sulfur coke is 3.8 to 4.5 percent.

The preparation method of the calcined coke comprises the following steps:

(1) taking the petroleum coke and crushing;

(2) adding the calcined coke into a calcining furnace, calcining at 1200-1300 ℃ under the condition of air isolation, and controlling the number-dividing negative pressure of each flame path of the calcining furnace at 80-100 Pa to obtain calcined coke.

The sulfur content of calcined coke prepared by the method reaches 3%, and the average resistivity value is 600 mu omega m.

Example 4

The calcined coke is prepared from the following raw materials: the weight ratio of the low-sulfur coke to the high-sulfur coke is 0.9: 1, the sulfur content of the low-sulfur coke is 1.5 to 2.0 percent, and the sulfur content of the high-sulfur coke is 3.8 to 4.5 percent.

The preparation method of the calcined coke comprises the following steps:

(1) taking the petroleum coke and crushing;

(2) adding the calcined coke into a calcining furnace, calcining at 1200-1300 ℃ under the condition of air isolation, and controlling the number-dividing negative pressure of each flame path of the calcining furnace at 80-100 Pa to obtain calcined coke.

The sulfur content of calcined coke prepared by the method reaches 3%, and the average resistivity value is 600 mu omega m.

Example 5

The calcined coke is prepared from the following raw materials: the weight ratio of the low-sulfur coke to the high-sulfur coke is 1: 0.9 percent, 1.5 to 2.0 percent of sulfur content of low-sulfur coke and 3.8 to 4.5 percent of high-sulfur coke.

The preparation method of the calcined coke comprises the following steps:

(1) taking the petroleum coke and crushing;

(2) adding the calcined coke into a calcining furnace, calcining at 1200-1300 ℃ under the condition of air isolation, and controlling the number-dividing negative pressure of each flame path of the calcining furnace at 80-100 Pa to obtain calcined coke.

The sulfur content of calcined coke prepared by the method reaches 3%, and the average resistivity value is 600 mu omega m.

Comparative example 1

The calcined coke is prepared from the following raw materials: the weight ratio of the ultra-low sulfur coke to the high sulfur coke is 0.7: 3, the sulfur content of the ultra-low sulfur coke is 1.0 to 1.5 percent, and the sulfur content of the high sulfur coke is 3.8 to 4.5 percent.

The preparation method of the calcined coke comprises the following steps:

(1) taking the petroleum coke and crushing;

(2) adding the calcined coke into a calcining furnace, calcining at 1200-1300 ℃ under the condition of air isolation, and controlling the number-dividing negative pressure of each flame path of the calcining furnace at 80-100 Pa to obtain calcined coke.

The sulfur content of calcined coke prepared by the method reaches 2.45 percent, and the average resistivity value is 500 mu omega m.

The foregoing is a preferred embodiment of the present invention, and is not intended to limit the invention in any way, so that modifications and equivalents may be made thereto without departing from the spirit and scope of the invention.

Claims (6)

1. A preparation method of calcined coke is characterized by comprising the following steps: the raw materials for preparing the calcined coke comprise: low sulfur coke and high sulfur coke.

2. The method of claim 1, wherein the low sulfur coke has a sulfur content of 1.5% to 2.0%.

3. The method of claim 1, wherein the high sulfur coke content is 3.8% -4.5%.

4. The method for preparing calcined coke according to claim 1, wherein the weight ratio of the low-sulfur coke to the high-sulfur coke is 0.8-1.2: 0.8-1.2.

5. The method for preparing calcined coke according to claim 1, wherein the weight ratio of the low-sulfur coke to the high-sulfur coke is 1: 1.

6. A method of producing calcined coke according to any one of claims 1 to 5, characterized in that the method comprises:

(1) taking the petroleum coke and crushing;

(2) adding the calcined coke into a calcining furnace, calcining at 1200-1300 ℃ under the condition of air isolation, and controlling the number-dividing negative pressure of each flame path of the calcining furnace at 80-100 Pa to obtain calcined coke.