CN114088710A

CN114088710A - Process method for judging source of metallurgical coke non-molten material

Info

Publication number: CN114088710A
Application number: CN202111372631.2A
Authority: CN
Inventors: 吴利波; 丁爽
Original assignee: HEILONGJIANG JIANLONG CHEMICAL CO Ltd
Current assignee: HEILONGJIANG JIANLONG CHEMICAL CO Ltd
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-02-25

Abstract

The invention relates to and belongs to the technical field of steel production, in particular to a process method for judging the source of metallurgical coke non-molten matters, which comprises the following steps of 1, collecting a matched single coal sample on site, and dividing and airing the coal sample for later use; 2. separating the small coke oven test coal box by using a coal sample separation plate with a round hole; the number of the separation spaces is determined according to the number of the blended coal or the number of the coal types to be detected; 3. respectively filling the separated spaces with the single coal samples to avoid the contact and mixing of the single coals; 4. loading a test coal box into a test coke oven for coking, wherein the coking heating time is 20h and the temperature is 1100 ℃; 5. after coke is quenched, the coke section is observed, and whether non-melting particles exist or not and the size and the state of the particles are checked. The source of the non-melting particles can be quickly found, the number of one-time tests is large, the test steps are simple, the test time is short, and the test result is visual.

Description

Process method for judging source of metallurgical coke non-molten material

Technical Field

The invention belongs to the technical field of steel production, and particularly relates to a process method for judging the source of metallurgical coke non-molten matters.

Background

At present, the quantity of coal blending and coking coal is more and more, and the coal blending is more and more serious. Resulting in the frequent occurrence of non-melting particles in the coke which directly destroy the post-reaction strength of the coke. Therefore, it is necessary to design a process for determining the source of the metallurgical coke-free fusant.

Disclosure of Invention

In order to solve the technical problems, the invention provides a process method for judging the source of non-molten metallurgical coke, wherein air cannons are arranged at the bottom edge points of a dome, 1-12 coal samples can be checked at one time within 8-20 hours by utilizing a test coke oven, which single coal the non-molten particles come from can be efficiently checked, and an effective method is provided for solving the problem of coke quality glide. The method can quickly search the source of the non-melting particles, and has the advantages of large number of one-time tests, simple test steps, short test time and visual test result performance. Is an optimal method for finding out which single coal causes the coke quality to slide down, and is a preferred method for checking the state and the quality of the single coal mixed coal.

The technical scheme adopted by the invention is as follows: a process method for judging the source of metallurgical coke infusible matter is characterized in that: the process method comprises the following steps:

firstly, a matched single coal sample is adopted on site, and various coal samples are subjected to division and air drying for later use; the coal sample is not crushed and can be properly dried in the air, and the same moisture of each coal sample is kept;

step two, a coal sample partition plate with a round hole with the diameter of 15mm is used for partitioning a small coke oven test coal box, and the 40 kg test coke oven coal box is divided into 2, 4, 8 or 12 spaces; the number of the separation spaces is determined according to the number of the blended coal or the number of the coal types to be detected; the coal sample partition plate can adopt a 314L stainless steel plate (delta =3 mm), a plurality of blocks can be manufactured, deformation and oxidation are reduced by adopting the stainless steel plate, multiple use is achieved, and a phi =15mm hole is drilled in the stainless steel plate, so that the volatile gas can be smoothly discharged;

step three, respectively filling the separated spaces with the single coal samples to avoid the contact and mixing of the single coals;

step four, the coal box is arranged in a test coke oven for coking, the coking heating time is 8-24h, the temperature is 1000-;

and fifthly, after coke is quenched, observing the section of the coke, and checking whether non-molten particles exist and the size and the state of the particles.

Further, in the fourth step, the heating time for coking is 16 h.

Further, in the fourth step, the heating temperature for coking is 1100 ℃.

Furthermore, the coal box is divided into equal spaces by utilizing the partition plates with different sizes, and the upper coal layer and the lower coal layer can be provided with the partition plates which are slightly smaller than the transverse sectional area of the coal box. Single coal with equal weight and different coal types can be loaded in each space.

The invention has the beneficial effects that: the process method for judging the source of the non-molten metallurgical coke is provided, the air cannons are arranged at the edge points of the bottom of the dome, 1-12 coal samples can be checked at one time within 8-20 hours by utilizing a test coke oven, the single coal from which the non-molten particles come can be efficiently checked, and an effective method is provided for solving the problem of the downward quality of the coke. The method can quickly search the source of the non-melting particles, and has the advantages of large number of one-time tests, simple test steps, short test time and visual test result performance. Is an optimal method for finding out which single coal causes the coke quality to slide down, and is a preferred method for checking the state and the quality of the single coal mixed coal.

Drawings

FIG. 1 is a schematic structural diagram of a test coal box in the first embodiment;

FIG. 2 is a schematic structural view of a coal-like partition plate according to the first embodiment.

Detailed Description

Referring to fig. 1 and 2, a process for determining the source of metallurgical coke-free smelt, the process comprising the steps of:

firstly, a single coal sample for blending is adopted on site, and each coal sample is subjected to division and air drying for later use; the coal sample is not crushed and can be properly dried in the air, and the same moisture of each coal sample is kept;

step three, respectively filling each single coal sample into the separated space to avoid the contact and mixing of each single coal;

step four, the coal box is put into a test coke oven for coking, the coking heating time is 20 hours, the temperature is 1100 ℃, the time and the temperature are controlled according to the time of knowing the result and the amount of the coal sample, the heating time is short, and the heating temperature can be properly increased;

and step five, after coke quenching, observing the coke cross section, and checking whether non-molten particles exist and the size and the state of the particles.

The classification of the national standard bituminous coals is 14, and part of bituminous coals are not suitable for coking, wherein the fragmentation property of the bituminous coals is poor, coal particles cannot be melted, and the bituminous coals are mixed into coking coals to destroy the coke quality. It is not possible to distinguish in the original clean coal sample which coals are not melted and are melted during the coking process. By the high-temperature refining of the coal sample, the coking states of the non-melting coal type (non-coking coal type) and the melting coal type (coking coal type) are completely different and can be obviously distinguished from each other on the coke section. In the actual coking process, the coal sample is crushed, so that the particles of the non-molten coal are greatly reduced, and the state of the particles on the cross section of the coke is greatly reduced. By not pulverizing the coal sample, the particle size of the unmelted coal species can be maintained, which can maintain the maximum appearance on the coke cross-section. By the process method, the non-melting coal particles can be clearly shown on the surface of the coke, so that the coal types and the degree of the non-melting coal types can be distinguished.

Claims

1. A process method for judging the source of metallurgical coke infusible matter is characterized in that: the process method comprises the following steps:

firstly, a matched single coal sample is adopted on site, and various coal samples are subjected to division and air drying for later use;

step two, a coal sample partition plate with a round hole with the diameter of 15mm is used for partitioning a small coke oven test coal box, and 40 kg of the test coal box is divided into 2, 4, 8 or 12 spaces; the number of the separation spaces is determined according to the number of the blended coal or the number of the coal types to be detected;

step four, placing the test coal box into a test coke oven for coking, wherein the coking heating time is 8-24h, and the temperature is 1000-1200 ℃;

2. The process method for judging the source of the metallurgical coke-free fusant as claimed in claim 1, wherein the process comprises the following steps: in the fourth step, the coking heating time is 16 h.

3. The process method for judging the source of the metallurgical coke-free fusant as claimed in claim 1, wherein the process comprises the following steps: in the fourth step, the heating temperature for coking is 1100 ℃.