CN108254403B - Evaluation method for coking efficiency of single coal blending - Google Patents

Abstract

The invention relates to an evaluation method, in particular to an evaluation method for the coking efficiency of single coal blending; single coal char test: performing a coke oven test on each single coal to simulate the actual production state of coking; after the coke is smelted, the experimental result is measured, including the mechanical strength and the strength after reaction of the single coal coke; establishing a same-coal test database, and comparing and analyzing data; establishing a database of the mechanical strength and the post-reaction strength of the single coal coke and the blended coal coking coke, namely testing or producing the blended coal and establishing a machine account; establishing a corresponding database of single coal and blended coal coking coke; calculating the mass of single coal and the data of coke refined by blended coal; and (3) coke quality prediction: and (4) performing summation calculation by using a coal blending scheme and the mechanical strength and the post-reaction strength of the single coal, and calculating the mechanical strength and the post-reaction strength of the coke. The blending efficiency of single coal is improved, the quality stability of coke is ensured, and the economic benefit is improved.

Description

Evaluation method for coking efficiency of single coal blending

The technical field is as follows:

the invention relates to an evaluation method, in particular to an evaluation method for the coking efficiency of single coal blending.

Background art:

the quality indexes of the existing coking coal are volatile components (Vdaf) and ash content (Ad%). In the actual production, the phenomenon that the coke strength (M25 and CSR) is not related or has small correlation with the maximum thickness of volatile components and a colloidal layer often occurs, so that the coke strength index cannot be predicted accurately. This indicates that the existing indexes do not fully reflect the characteristics of coking coal which affect the coke quality. A quality index is added in the coking coal quality index, and the added single coal quality index has stronger correlation with the coke strength (M25 and CSR).

The invention content is as follows:

the invention utilizes the inaccuracy of the maximum thickness (Ymm) of the colloidal layer and the caking index (G) to predict the coke strength and even contradicts the reality, and increases the M25 and CSR predicted coke strength for single coal coking, thereby solving the problem of inaccurate prediction of the coke strength and ensuring more accurate prediction of the coke strength. The blending efficiency of single coal is improved, the stable quality of coke is ensured, and the economic benefit is improved.

The technical scheme adopted by the invention is as follows: a method for evaluating the coking efficiency of single coal blending comprises the following steps:

the method comprises the following steps: single coal coking test;

(1) performing a coke oven test on each single coal, simulating the actual production state of coking, wherein the refining time and the tamping bulk density are consistent with the actual production;

(2) after the coke is refined, the experimental result is measured, and the experimental result comprises the mechanical strength (M25) and the post-reaction strength (CSR) of the coke of the single coal;

(3) establishing a same-coal test database, and comparing and analyzing the data;

step two: establishing a database of mechanical strength (M25) of single coal coke, post-reaction strength (CSR) and blended coal refining coke;

(1) testing or producing the blended coal, and establishing a platform account;

(2) establishing a corresponding database of coke refined from single coal and blended coal;

(3) calculating the mass of single coal and the data of coke refined by blended coal;

(4) and coke quality prediction: the coke mechanical strength (M25) and the post-reaction strength (CSR) are calculated by adding the coal blending scheme and the single coal mechanical strength (M25) and the post-reaction strength (CSR).

The invention has the beneficial effects that: the inaccuracy of predicting the coke strength by utilizing the maximum thickness (Ymm) of the colloidal layer and the caking index (G) is even contrary to the reality, the problem of inaccuracy of predicting the coke strength is solved by increasing the predicted coke strength of M25 and CSR for single coal coking, and the predicted coke strength is more accurate. The blending efficiency of single coal is improved, the stable quality of coke is ensured, and the economic benefit is improved.

The specific implementation mode is as follows: a method for evaluating the coking efficiency of single coal blending is characterized in that: the method comprises the following steps:

the method comprises the following steps: single coal coking test;

(1) performing a coke oven test on each single coal, simulating the actual production state of coking, wherein the refining time and the tamping bulk density are consistent with the actual production;

(2) after the coke is refined, the experimental result is measured, and the experimental result comprises the mechanical strength (M25) and the post-reaction strength (CSR) of the coke of the single coal;

(3) establishing a same-coal test database, and comparing and analyzing the data;

step two: establishing a database of mechanical strength (M25) of single coal coke, post-reaction strength (CSR) and blended coal refining coke;

(1) testing or producing the blended coal, and establishing a platform account;

(2) establishing a corresponding database of coke refined from single coal and blended coal;

(3) calculating the mass of single coal and the data of coke refined by blended coal;

(4) and coke quality prediction: the coke mechanical strength (M25) and the post-reaction strength (CSR) are calculated by adding the coal blending scheme and the single coal mechanical strength (M25) and the post-reaction strength (CSR).

The principle that single coal can be independently refined into coke is utilized, the quality index and the coke strength (M25 and CSR) of the single coal are obtained, and the coke quality can be predicted by combining a coal blending scheme to carry out addition calculation. Through a large number of experiments, the coking performance (the mechanical strength and the strength after reaction of the coke formed by single coal coking) of single coal and the actually produced coke are very strongly correlated (the correlation coefficient reaches 0.984).

Claims (1)

1. A method for evaluating the coking efficiency of single coal blending is characterized in that: the method comprises the following steps:

the method comprises the following steps: single coal coking test;

(1) performing a coke oven test on each single coal, simulating the actual production state of coking, wherein the refining time and the tamping bulk density are consistent with the actual production;

(2) after the coke is refined, the experimental result is measured, and the experimental result comprises the mechanical strength M25 and the post-reaction strength CSR of the coke of the single coal;

(3) establishing a same-coal test database, and comparing and analyzing the data;

step two: establishing a database of the mechanical strength M25 of the single coal coke, the post-reaction strength CSR and the blended coal coking coke;

(1) testing or producing the blended coal, and establishing a platform account;

(2) establishing a corresponding database of coke refined from single coal and blended coal;

(3) calculating the mass of single coal and the data of coke refined by blended coal;

(4) and coke quality prediction: and (3) calculating the mechanical strength M25 and the post-reaction strength CSR of the coke by utilizing a coal blending scheme and the mechanical strength M25 and the post-reaction strength CSR of the single coal for addition calculation.