CN-122016552-A - Quick method for evaluating single coal quality by checking loss amount of coking single coal after high-temperature reaction

CN122016552ACN 122016552 ACN122016552 ACN 122016552ACN-122016552-A

Abstract

The invention discloses a rapid method for evaluating the quality of single coal by checking the loss amount of coking single coal after high-temperature reaction, and relates to a rapid method for evaluating the quality of single coal by checking the loss amount of coking single coal after high-temperature reaction. The invention aims to solve the problems of long period and high cost of the existing detection method. The method comprises the steps of carrying out standardized treatment on raw material coal, carrying out charging and tamping, carrying out coking and placing and feeding, carrying out heating coking, carrying out quenching and cooling, screening and weighing six coke blocks, carrying out high-temperature reaction test, weighing eight after reaction, carrying out calculation on nine loss amounts and evaluating quality, wherein the method is used for evaluating the quality of single coal for checking the loss amount of coking single coal after high-temperature reaction.

Inventors

LIU JIANXUN
CONG WEI
CHAI YUFENG
WANG DENGFU
ZHANG XIUYUAN
WEI MING
WANG YUGUANG

Assignees

黑龙江建龙化工有限公司
黑龙江建龙钒钛研究院有限公司

Dates

Publication Date: 20260512
Application Date: 20260324

Claims (9)

1. A rapid method for evaluating the quality of single coal for checking the loss amount after high-temperature reaction of coking single coal is characterized in that the rapid method for evaluating the quality of single coal for checking the loss amount after high-temperature reaction of coking single coal is specifically carried out according to the following steps: 1. raw material coal standardization treatment, namely crushing single coal for coking to be detected, and naturally airing crushed coal samples; 2. filling and tamping, namely filling the treated coal sample into a test container, and tamping the coal sample in the container; 3. the method comprises the steps of coking, placing and delivering the test container filled with the coal sample into a special coal box for the test coke oven symmetrically, ensuring uniform heating in the coal box; 4. heating and coking, namely heating and coking the coal sample in the coal box according to a conventional heating system of a test coke oven, so as to ensure the standardization of a coking process and fully refine the coal sample into coke; 5. quenching and cooling, namely discharging the test sample from the coke oven after coking is finished, and cooling and quenching the coke by adopting a small quantity of water spraying mode for multiple times; 6. screening and weighing coke blocks, namely crushing the coke after quenching, adopting a standard screen to screen the oversize coke with the size larger than 5mm, weighing the screened coke and recording data as the initial weight of the coke; 7. high temperature reaction test, namely, carrying out high temperature reaction test on the screened blocky coke, and simulating the high temperature reaction environment of the coke in actual production; 8. weighing after the reaction, namely taking out the coke in the container after the high-temperature reaction test is finished, weighing the reacted blocky coke and recording data as the residual weight of the coke; 9. and evaluating the high-temperature reactivity and coking quality of the single coal by comparing the loss data of different batches of the same coal type, wherein the lower the loss is, the better the high-temperature reactivity and the higher the coking quality of the single coal are.
2. The rapid method for evaluating the quality of single coal for checking the loss amount after the high-temperature reaction of single coal for coking according to claim 1, wherein the single coal for coking to be checked in the step one is coking coal, fat coal, gas coal, 1/3 coke or lean coal.
3. The rapid method for evaluating the quality of single coal by detecting the loss amount of coking single coal after high-temperature reaction according to claim 1, which is characterized in that in the first step, the fineness ratio of less than 3mm in a coal sample is controlled to be more than 90%, and the moisture content of the coal sample is controlled to be less than 10% by airing.
4. The quick method for evaluating the quality of single coal by detecting the loss amount of coking single coal after high-temperature reaction according to claim 1 is characterized in that in the second step, a 306L stainless steel pipe with the diameter of 125mm is used for cutting a pipe body with the length of 200mm, a stainless steel plate with the thickness of 3mm is used for welding and plugging the bottom, a cover plate made of the stainless steel plate is manufactured in a matched mode, a cylindrical test container is manufactured, and 8-16 test containers are manufactured in batches according to the actual volume of a test Jiao Lutie box.
5. The rapid method for evaluating the quality of single coal by checking the loss amount after high-temperature reaction of coking single coal according to claim 1, wherein the tamping operation in the second step controls the bulk specific gravity of the coal sample to be 1.1 ton/m 3 .
6. The rapid method for evaluating the quality of single coal by checking the loss amount after the high-temperature reaction of single coal for coking, which is characterized by 1.0 ℃ per minute of heating rate of coking in the fourth step, 850 ℃ of coal charging temperature of coking, 1050 ℃ of constant temperature of coking and 18h of coking time.
7. The rapid method for evaluating the quality of single coal by checking the loss amount of coking single coal after high-temperature reaction according to claim 1, which is characterized in that in the fifth step, the moisture content of coke is controlled to be lower than 5% by cooling and quenching, and the physical shape of the coke is ensured to be complete.
8. The rapid method for evaluating the quality of single coal by checking the loss amount after high temperature reaction of coking single coal according to claim 1, wherein the crushing treatment in the step six is to crush large coke of more than 40mm to below 40 mm.
9. The quick method for evaluating the quality of the single coal by checking the loss amount after the high-temperature reaction of the coking single coal is characterized by comprising the following steps of heating an electric furnace, heating at a temperature of 8-16 ℃ per minute, introducing nitrogen at a flow of 0.8L/min when the temperature of a material layer reaches 400 ℃, stabilizing for 10min when the temperature of the material layer reaches 1100 ℃, cutting off the nitrogen, introducing carbon dioxide at a flow of 5L/min, recording the starting reaction time, recovering the temperature of the material layer to 1100 ℃ within 5-10 min after introducing the carbon dioxide, reacting for 2h, stopping heating, cutting off the carbon dioxide, introducing the nitrogen at a flow of 2L/min, discharging the furnace after the temperature of the material layer reaches below 100 ℃ under the protection of the nitrogen, and ending the high-temperature reaction test.

Description

Quick method for evaluating single coal quality by checking loss amount of coking single coal after high-temperature reaction Technical Field The invention relates to a rapid method for evaluating the quality of single coal by checking the loss of coking single coal after high-temperature reaction. Background In the coking and coking production process of iron and steel enterprises, the intensity after reaction (CSR) of coking single coal is a core index for evaluating the quality of single coal, and the quality of coking products and the production efficiency of subsequent blast furnace ironmaking are directly determined. The existing method for checking the strength of the coking single coal after reaction needs to independently refine the single coal for 24 hours through a test coke oven, and then a series of detection operations for the strength of the coking coal after reaction are carried out after the refining is finished. The traditional detection method has obvious technical defects that on one hand, the detection period is overlong, the 24-hour refining process of single coal coking occupies main detection time, quality state data of single coal cannot be quickly obtained, the quick screening and quality control of raw material coal in coking production are greatly puzzled, on the other hand, the detection cost is higher, batch detection cannot be realized in a single coal coking mode, only one coal sample can be detected in each batch, the detection cost of equipment, energy and manual units is high, and the large-scale quality detection of coking raw material coal by enterprises is not facilitated. Therefore, research and development of a coking single coal quality evaluation method capable of batch detection, shortening the detection period and reducing the detection cost and ensuring the accuracy of the detection result becomes a technical problem to be solved urgently in the coking production field of iron and steel enterprises. Disclosure of Invention The invention provides a rapid method for evaluating the quality of single coal by checking the loss amount of coking single coal after high-temperature reaction, which solves the problems of long period and high cost of the existing detection method, realizes batch rapid checking of the high-temperature reactivity of single coal, evaluates the coking performance of single coal with high efficiency, and provides a rapid and accurate basis for controlling the quality of raw materials in coking production. The quick method for evaluating the quality of the single coal by checking the loss amount of the coking single coal after the high-temperature reaction is specifically carried out according to the following steps: 1. raw material coal standardization treatment, namely crushing single coal for coking to be detected, and naturally airing crushed coal samples; 2. filling and tamping, namely filling the treated coal sample into a test container, and tamping the coal sample in the container; 3. the method comprises the steps of coking, placing and delivering the test container filled with the coal sample into a special coal box for the test coke oven symmetrically, ensuring uniform heating in the coal box; 4. heating and coking, namely heating and coking the coal sample in the coal box according to a conventional heating system of a test coke oven, so as to ensure the standardization of a coking process and fully refine the coal sample into coke; 5. quenching and cooling, namely discharging the test sample from the coke oven after coking is finished, and cooling and quenching the coke by adopting a small quantity of water spraying mode for multiple times; 6. screening and weighing coke blocks, namely crushing the coke after quenching, adopting a standard screen to screen the oversize coke with the size larger than 5mm, weighing the screened coke and recording data as the initial weight of the coke; 7. high temperature reaction test, namely, carrying out high temperature reaction test on the screened blocky coke, and simulating the high temperature reaction environment of the coke in actual production; 8. weighing after the reaction, namely taking out the coke in the container after the high-temperature reaction test is finished, weighing the reacted blocky coke and recording data as the residual weight of the coke; 9. and evaluating the high-temperature reactivity and coking quality of the single coal by comparing the loss data of different batches of the same coal type, wherein the lower the loss is, the better the high-temperature reactivity and the higher the coking quality of the single coal are. The beneficial effects of the invention are as follows: compared with the prior art, the inspection method of the invention has the following remarkable effects and advantages: the invention realizes batch detection and greatly shortens the detection period, namely, single coal is respectively filled into different containers and then is fed into a cok