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Method for detecting suitability of coking coal

A coking coal and adaptability technology, which is applied in the preparation of test samples, measuring devices, and weighing by removing certain components, can solve the problems of long test period, long time consumption, and inability to adapt to the fast pace of industrial production.

Inactive Publication Date: 2020-05-08
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing method for testing the suitability of coking coal is: organize large-scale small coke oven tests to conduct coking suitability research, and finally obtain the suitability results of coking coal. This method is increasingly unable to meet the actual production of enterprises. The method not only needs to consume a lot of manpower and material costs, but also has a long test cycle and time-consuming, and cannot adapt to the fast pace of industrial production. At the same time, therefore, it is urgent to find a time-saving and cost-saving method that can quickly perform suitability testing. method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1, crushing the coking coal 1 and 1 / 3 coking coal 1 coal samples to below 0.5 mm respectively;

[0024] Step 2, two kinds of single coals are fully mixed into a mixed coal sample with a total weight of 10.5g in a ratio of 1:1 by weight;

[0025] Step 3, place the mixed coal sample in the crucible, and compact it with a 150g heavy briquetting block for 40s (i.e. pressed into a briquette);

[0026] Step 4. Put the crucible into a muffle furnace with a preheating temperature of 850-900°C (that is, a heating device, which includes but is not limited to a muffle furnace) to keep the temperature constant for 60 minutes, during which 2L / min nitrogen protection is introduced into the muffle furnace ;

[0027] Step 5. After constant temperature for 60 minutes, take out the coke slag (that is, coke cake, just called it differently) in the crucible, and weigh it, record m 1 =7.42g;

[0028] Step 6. Put the coke slag into a drum with an inner diameter of 200mm and a depth o...

Embodiment 2

[0032] Step 1, crushing the coking coal 2 and 1 / 3 coking coal 2 coal samples to below 0.5mm respectively;

[0033] Step 2, two kinds of single coals are fully mixed into a mixed coal sample with a total weight of 10.8g in a weight ratio of 1:2;

[0034] Step 3. Put the mixed coal sample in the crucible and compact it with a 150g heavy briquetting block for 60s;

[0035] Step 4. Send the crucible into a muffle furnace with a preheating temperature of 850-900°C to keep the temperature constant for 60 minutes, during which 2L / min nitrogen protection is introduced into the muffle furnace;

[0036] Step 5. After constant temperature for 60 minutes, take out the coke slag in the crucible and weigh it, record m 1 =7.38g;

[0037] Step 6. Put the coke slag into a drum with an inner diameter of 200mm and a depth of 70mm, and rotate at a speed of 50±2r / min for 5min;

[0038] Step 7. Sieve the coke block obtained after drumming with a 2mm square hole sieve, weigh the sieve, record m ...

Embodiment 3

[0041] Step 1, crushing the coking coal 3 and 1 / 3 coking coal 3 coal samples to below 0.5mm respectively;

[0042] Step 2. Fully mix the two single types of coal at a weight ratio of 1:3 to form a mixed coal sample with a total weight of 10.2 g.

[0043] Step 3. Put the mixed coal sample in the crucible and compact it with a 150g heavy briquetting block for 30s;

[0044] Step 4. Send the crucible into a muffle furnace with a preheating temperature of 850-900°C to keep the temperature constant for 60 minutes, during which 2L / min nitrogen protection is introduced into the muffle furnace;

[0045] Step 5. After constant temperature for 60 minutes, take out the coke slag in the crucible and weigh it, record m 1 =7.26g;

[0046] Step 6. Put the coke slag into a drum with an inner diameter of 200mm and a depth of 70mm, and rotate at a speed of 50±2r / min for 5min;

[0047] Step 7. Sieve the coke block obtained after drumming with a 2mm square hole sieve, weigh the sieve, and recor...

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Abstract

The invention discloses a method for detecting suitability of coking coal. The method comprises the following steps: 1, respectively crushing two kinds of single coking coal to designed fineness; 2, fully and uniformly mixing the two single coking coals according to a weight ratio of 1:(1-3) to obtain a mixed coal sample; and 3, placing the mixed coal sample in a heating device, and pressing the mixed coal sample into a coal cake. Through detecting the suitability of a small sample, the small sample is quantified to obtain a coking coal suitability index CI, the higher the coking coal suitability index CI is, the better the suitability is, so that a large-scale small coke oven test does not need to be organized for coking coal suitability research, and the method is simple, convenient, quick, time-saving and labor-saving, not only can adapt to the fast pace of industrial production, but also can accurately reflect the suitability among different coal types, and overcomes the defects ofan existing detection method.

Description

technical field [0001] The invention relates to the technical field of testing the suitability of coking coal, in particular to a method for testing the suitability of coking coal. Background technique [0002] Under traditional chamber coking conditions, in order to produce high-quality metallurgical coke that meets the requirements of blast furnace production, it is required that the softening range and temperature interval of the colloids of each single coal in the blended coal can be well overlapped, so that the blended coal can be used In the process of coking, coal can be in a plastic state within a relatively large temperature range, and the process of mutual melting, infiltration and interaction in this range takes a long time, and the formed coke is dense and high in strength, that is, it is required to cooperate with each other in the coal. Coal types have good adaptability. [0003] The existing method for testing the suitability of coking coal is: organize large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04G01N1/28
CPCG01N5/04G01N1/286
Inventor 杨正林李轶王萍王映荣高云祥杨立新
Owner WUKUN STEEL