JPH07126657A - Blast furnace coke manufacturing method - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a method of rapidly heating coal to cause caking, and charging the coal into a carbonization furnace without losing the caking to obtain carbonized coke. . [Composition] When the hot forming temperature (T) after rapid heating of coal at 10 ² to 10 ⁶ ° C / min is Ts> T ≧ Ts-10 (° C) with respect to the softening and melting temperature (Ts). , 0.1-1
Hot forming at 0 kg / cm ² , Ts-10> T ≧ T
In the case of s-50 (° C), hot molding is performed at 10 to 100 kg / cm ² , and Ts-50> T ≧ Ts-150 (° C)
In the case of, hot molding at 100-500 kg / cm ² ,
After that, carbonization is carried out, and a method for producing blast furnace coke, which is characterized in that

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing blast furnace coke, which comprises rapidly heating coal, hot-molding it, and then subjecting it to carbonization.

[0002]

2. Description of the Related Art Coal is rapidly heated and then hot-formed, and then
In the method for producing blast furnace coke by carbonization, by rapidly heating the coal to just before the softening start temperature, a softening and melting component is suddenly generated, and the caking property is improved, but the temperature is further increased, When the temperature is maintained as it is, the reaction of the softening and melting component changing to semi-coke proceeds. When the softened and melted component becomes semi-coke, the caking property is lost, so that subsequent agglomeration in the carbonization furnace is not performed.

In this process, in handling, 2
If the time is enough, the hot molded product can be smoothly transferred and charged into the carbonization furnace. Also, troubles can be dealt with. But,
At the temperature immediately before the start of softening, if the softening and melting component is held for 5 to 30 minutes, the softening and melting component becomes semi-coke. Therefore, it is necessary to maintain the softened and melted state for up to 2 hours.

[0004]

The object of the present invention is to maintain the softening and melting state where the caking property appears in the rapid thermal decomposition of coal for 2 hours to eliminate the caking property before charging the carbonization furnace. Instead, it is to smoothly agglomerate in a carbonization furnace to produce high-strength coke.

[0005]

In the present invention, in order to solve the above-mentioned problems, a rapidly heated product is hot-molded to suppress the release of the softening and melting component out of the system so that the softening and melting state is maintained for 2 hours. Can be held. That is, 10 ² to 1 of coal
0 for hot working temperature after rapid heating at ⁶ ° C. / min (T) is softening and melting temperature (Ts), Ts> T ≧ Ts-10
In the case of (° C), hot forming is performed at 0.1 to 10 kg / cm ² , and in the case of Ts-10> T ≧ Ts-50 (° C),
Hot molding is performed at 10 to 100 kg / cm ² for Ts-5.
When 0> T ≧ Ts−150 (° C.), 100 to 500
It is characterized in that it is hot-molded at kg / cm ² and then dry-distilled.

[0006]

In the present invention, when coal is rapidly heated, it softens and melts and exhibits a caking property. However, since this caking property disappears with temperature and time, a rapidly heated product is maintained in order to maintain this softened and molten state. Was hot molded. As a result, it was clarified that the softened and molten state can be maintained for 2 hours by adjusting the hot molding temperature and the hot molding pressure, and that a hot molded product having a strength capable of withstanding handling can be obtained.

That is, in the present invention, 10 ²
Hot forming temperature (T) after rapid heating at -10 ⁶ ° C / min
With respect to the softening melting temperature (Ts), Ts> T ≧ Ts−1
In case of 0 (° C), hot forming is performed at 0.1 to 10 kg / cm ² , and in case of Ts-10> T ≧ Ts-50 (° C), hot forming is performed at 10 to 100 kg / cm ^2. Done, Ts
In the case of −50> T ≧ Ts−150 (° C.), 100 to 5
It was found that high-strength coke can be obtained by hot molding at 00 kg / cm ² and then charging to a carbonization furnace by 2 hours for carbonization.

In the present invention, coal is treated at 10 ² to 10 ⁶ ° C.
Molding pressure of less than 0.1 kg / cm ² when the hot molding temperature (T) after rapid heating at 1 / min is Ts> T ≧ Ts−10 (° C.) with respect to the softening melting temperature (Ts) A molded product cannot be obtained by molding with, and furthermore, when it is charged into a carbonization furnace, the caking property of the rapidly heated product completely disappears in 5 minutes. On the other hand, when the molding pressure exceeds 10 kg / cm ² , the obtained molded product swells in the carbonization furnace, and the coke obtained has a high porosity and weak strength. When the hot forming temperature (T) after rapid heating of coal at 10 ² to 10 ⁶ ° C / min is Ts-10> T ≧ Ts-50 (° C) with respect to the softening and melting temperature (Ts). To 10
A molded product cannot be formed by molding at a molding pressure of less than kg / cm ^2, and when the product is charged into a dry distillation furnace, the rapidly heated product completely loses its caking property in 10 minutes. On the other hand, when the molding pressure exceeds 100 kg / cm ² , the obtained molded product swells in the carbonization furnace, and the coke obtained has high porosity and weak strength. The hot forming temperature (T) after rapid heating of coal at 10 ² to 10 ⁶ ° C / min is Ts-50> relative to the softening and melting temperature (Ts).
When T ≧ Ts-150 (° C.), 100 kg / cm ²
If you mold with a molding pressure of less than
When this is charged into a carbonization furnace, the caking property of the rapidly heated material completely disappears in 20 minutes. . Meanwhile, molding pressure 500k
When it exceeds g / cm ² , the obtained molded product swells in the carbonization furnace, and the coke obtained has high porosity and weak strength. Dry distillation after hot forming is 8
Coke can be obtained by performing the treatment at 00 to 1350 ° C.

[0009]

EXAMPLES Table 1 shows that, using the apparatus shown in FIG. 1, a coal blend consisting of 10 types of coal was rapidly heated to a softening start temperature of 390 ° C. at 3 × 10 ⁴ ° C./min, and then 380 to 389.
Mold at each molding pressure at ℃, and then change the charging time to the carbonization furnace 10

[0010]

[Outer 1]

[0011]

[Table 1]

From Table 1, when the hot forming temperature (T) is Ts> T ≧ Ts-10 (° C.) with respect to the softening melting temperature (Ts), the hot forming is performed at 0.1 to 10 kg / cm ^2. Then, after charging the dry distillation furnace to dry distillation for up to 2 hours, DI
It can be seen that high-strength coke of ≧ 80 (%) is obtained.

Table 2 shows that the coal shown in FIG. 1 was used to rapidly heat blended coal consisting of 10 types of coal at a softening start temperature of 390 ° C. at 3 × 10 ⁴ ° C./minute, and then 340-37.
The strength (DI) of the coke obtained by molding at 9 ° C. at each molding pressure and then changing the charging time to the carbonization furnace 10 to 1000 ° C. in the carbonization furnace 10 was measured. .

[0014]

[Table 2]

From Table 2, the hot forming temperature (T) is Ts-10> T ≧ Ts-50 with respect to the softening and melting temperature (Ts).
In the case of (° C.), hot molding is performed at 10 to 100 kg / cm ² , and after that, the coke with DI ≧ 80 (%) is obtained by charging into a dry distillation furnace and dry distillation within 2 hours. I understand.

Table 3 shows that the coal shown in FIG. 1 was used to rapidly heat a coal blend consisting of 10 types of coal at a softening start temperature of 390 ° C. at 3 × 10 ⁴ ° C./min, and then 240 to 33.
The strength (DI) of the coke obtained by molding at 9 ° C. at each molding pressure and then changing the charging time to the carbonization furnace 10 to 1000 ° C. in the carbonization furnace 10 was measured. .

[0017]

[Table 3]

From Table 3, the hot forming temperature (T) is Ts-50> T≥Ts-150 with respect to the softening and melting temperature (Ts).
In the case of (° C.), hot molding is performed at 100 to 500 kg / cm ² , and after that, by charging to a dry distillation furnace and dry distillation for up to 2 hours, high strength coke with DI ≧ 80 (%) is obtained. I understand.

[0019]

EFFECTS OF THE INVENTION By carrying out the present invention, since the caking property of coal that has been made to caking by rapid heating can be maintained for 2 hours, the handling to the carbonization furnace is smoothly performed, and further,
High strength coke can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic view of a coke manufacturing apparatus used in the present invention.

[Explanation of symbols]

10 ... Dry distillation furnace, 11 ... Hopper, 12 ... Carbonization chamber, 13 ... Charging port, 14 ... Heat storage chamber, 15 ... Combustion chamber, 16 ... Extruder, 17 ... Rack, 19 ... Coke bucket, 20 ... Coke reforming device, 21 ... dryer,
22 ... Preheater, 23 ... Hot air stove,
24 ... Molding machine, 25 ... Pre-chamber,
26 ... Cooling chamber.

Claims (1)

[Claims] 1. The hot forming temperature (T) after rapid heating of coal at 10 ² to 10 ⁶ ° C./min is Ts> T ≧ Ts−10 (° C.) with respect to the softening melting temperature (Ts). If 0.1
Hot-molded at 10kg / cm ² , Ts-10> T
In the case of ≧ Ts-50 (° C), 10 to 100 kg / cm
^2. Hot-molded at ² , Ts-50> T ≧ Ts-150
A method for producing coke for a blast furnace, which comprises hot molding at 100 to 500 kg / cm ² in the case of (° C.), and then performing dry distillation.