CN111122379A - Method for detecting adaptability of coking coal - Google Patents
Method for detecting adaptability of coking coal Download PDFInfo
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- CN111122379A CN111122379A CN202010012226.9A CN202010012226A CN111122379A CN 111122379 A CN111122379 A CN 111122379A CN 202010012226 A CN202010012226 A CN 202010012226A CN 111122379 A CN111122379 A CN 111122379A
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- coal
- coking
- adaptability
- suitability
- detecting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
Abstract
The invention discloses a method for detecting the adaptability of coking coal, which comprises the following steps: step 1, respectively crushing two single coking coals to design fineness; step 2, mixing the two single coking coals according to the weight ratio of 1: (1-3) fully and uniformly mixing the raw materials in proportion to obtain a mixed coal sample; and 3, placing the mixed coal sample in a heating device, pressing the mixed coal sample into a coal cake and the like. The adaptability of the small sample is detected and quantified to obtain a coking coal adaptability index CI, the higher the coking coal adaptability index CI is, the better the adaptability is, so that a large-scale small coke oven test does not need to be organized for researching the adaptability of the coking coal, the method is simple, convenient, rapid, time-saving and labor-saving, the method not only can adapt to the fast rhythm of industrial production, but also can accurately reflect the adaptability among different coal types, and the defects of the existing detection method are overcome.
Description
Technical Field
The invention relates to the technical field of coking coal suitability detection, in particular to a method for detecting coking coal suitability.
Background
Under the traditional chamber coking condition, in order to produce high-quality metallurgical coke meeting the production requirement of a blast furnace, the softening interval and the temperature interval of the colloidal substance of each single coal in the blended coal are required to be well overlapped, so that the blended coal can be in a plastic state within a larger temperature range in the coking process, the process time of mutual melting, permeation and interaction in the interval is long, the formed coke is compact, the strength is higher, and the various coals in the blended coal are required to have better adaptability.
The existing method for detecting the adaptability of coking coal comprises the following steps: a large-scale small coke oven test is organized to conduct coking suitability research, and finally the suitability result of coking coal is obtained.
Disclosure of Invention
The invention aims to: aiming at the existing problems, the method for detecting the adaptability of the coking coal is provided, the compatibility between the two types of coking coal is simply, rapidly and conveniently found by adopting a small sample taking mode, the large-scale small coke oven test is not required to be organized for researching the adaptability of the coking coal, the method can be adapted to the fast rhythm of industrial production, and the defects of the existing detection method are overcome.
The technical scheme adopted by the invention is as follows: a method for detecting the suitability of coking coal is characterized by comprising the following steps:
step 1, respectively crushing two single coking coals to design fineness;
step 2, mixing the two single coking coals according to the weight ratio of 1: (1-3) fully and uniformly mixing the raw materials in proportion to obtain a mixed coal sample;
step 3, placing the mixed coal sample in a heating device, and pressing into a coal cake;
step 4, heating and coking the coal cake at constant temperature to obtain coke cake, taking out the coke cake from the heating device and weighing to obtain weight parameter m1；
Step 5, putting the coke cake into a rotary drum, and rotating at the rotating speed of 45-55rad/min for 3-7 min;
and 6, after the rotation is finished, taking out the coke cake, screening the coke cake by using a screen, weighing oversize materials to obtain a weight parameter m2；
Step 7, using m2Divided by m1And recording the obtained numerical value as a coking coal suitability index CI, and finishing the detection.
In the method, the compatibility between two types of coking coal is simply, rapidly and rapidly ascertained by adopting a small sample sampling mode, the adaptability of the small sample is detected and quantified to obtain a coking coal adaptability index CI, the higher the coking coal adaptability index CI is, the better the adaptability is, and otherwise, the poorer the adaptability is, so that a large-scale small coke oven test does not need to be organized for researching the adaptability of the coking coal, the method is simple, rapid, time-saving and labor-saving, not only can adapt to the rapid rhythm of industrial production, but also can accurately reflect the adaptability between different coal types, and the defects of the existing detection method are overcome.
In the invention, in order to reflect the adaptability between different coal types more accurately, in step 5, the inner wall of the bottom of the rotary drum is provided with a plurality of rib plates, and the rib plates are used for forming an uneven wall surface on the inner wall of the bottom of the rotary drum. The main reason for arranging the rib plates is that if the rib plates are not arranged, the movement condition of the coke cake in the rotary drum is as follows: the coke cake shape stability can not be effectively tested by the movement mode along the sliding of the inner wall of the bottom of the rotary drum, so that the adaptability of the two coal types can not be accurately detected, and after the rib plate is arranged, the rib plate and the coke cake form impact, so that the movement mode of the coke cake is changed, the sliding is changed into swinging rolling, and therefore the coke cake shape stability can be more effectively tested, and the accuracy is improved.
Preferably, the rib plates are arranged on the inner wall of the rotary drum in pairs and symmetrically, the height of the rib plates is not more than 30mm, the thickness of the rib plates is not more than 10mm, the number of the rib plates is more preferably one pair, the height of the rib plates is more preferably 20mm, and the thickness of the rib plates is more preferably 1-2 mm.
Further, in step 6, the screen is a square hole screen, and the hole diameter of the screen is not more than 2 mm. Screen meshShould not be too large or too small, otherwise it will affect m2The value of (a) is such that the resulting suitability index CI is higher or lower, and it has been found experimentally that, in the present invention, the mesh size is preferably not greater than 2 mm.
In the invention, when two single coking coals are crushed, the crushing fineness needs to be designed reasonably, if the particle size of the crushed particles is too large, the relative contact area of the two coking coal particles is too small when the two coking coal particles are mixed, so that the stability of the coke cake form is influenced, the obtained adaptability index CI is influenced finally, and the adaptability between the two coking coals cannot be reflected accurately, therefore, the adaptability index CI can be obtained accurately when the two single coking coals are crushed to be below 2mm respectively after being summarized through a plurality of experiments, further, the accuracy is greatly improved when the single coking coals are crushed to be below 0.5mm respectively, and the adaptability between the single coking coals can be reflected more accurately.
Further, in order to prevent the coal cake from being oxidized in the heating process to affect the experimental detection, in step 4, when the coal block is heated, the coal block is heated under the protective atmosphere condition.
Further, in order to make the coal cake form the coke cake better, the coal cake needs to be heated to the temperature close to the coking temperature, so in the step 4, the heating temperature is 850-.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that: the invention simply, conveniently and rapidly finds the compatibility between two types of coking coal by adopting a small sample taking mode, namely the adaptability of the small sample is detected and quantified to obtain the coking coal adaptability index CI, the higher the coking coal adaptability index CI is, the better the adaptability is, otherwise, the poorer the adaptability is, further, a large-scale small coke oven test is not required to be organized for researching the adaptability of the coking coal, the method is simple, convenient, rapid, time-saving and labor-saving, not only can adapt to the rapid pace of industrial production, but also can accurately reflect the adaptability between different coal types, and overcomes the defects of the existing detection method.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
1, respectively crushing a coking coal 1 sample and a coking coal 1 sample of 1/3 to be less than 0.5 mm;
step 2, fully and uniformly mixing the two kinds of single coal according to the weight ratio of 1:1 to obtain a mixed coal sample with the total weight of 10.5 g;
step 3, placing the mixed coal sample in a crucible, and compacting for 40s by using a 150g weight pressing block (namely pressing into a coal cake);
step 4, the crucible is sent into a muffle furnace (namely a heating device including but not limited to a muffle furnace) with the preheating temperature of 850-;
step 5, keeping the temperature for 60min, taking out the coke slag (namely the coke cake, which is called differently) in the crucible, weighing, and recording m1＝7.42g；
Step 6, putting the coke slag into a rotary drum with the inner diameter of 200mm and the depth of 70mm, and rotating at the rotating speed of 50 +/-2 r/min for 5 min;
step 7, screening the coke blocks obtained after the drum rotation by using a 2mm square-hole sieve, weighing oversize materials, and recording m2＝4.07g；
Step 8, with m1As denominator, m2The value obtained by calculation as a molecule was recorded as a coking coal suitability index CI of 0.548, and the suitability index CI between coking coal 1 and 1/3 coking coal 1 coal samples was found to be 0.548.
Example 2
Step 1, respectively crushing a coking coal 2 sample and a coking coal 2 sample of 1/3 to be less than 0.5 mm;
step 2, fully and uniformly mixing the two kinds of single coal according to the weight ratio of 1:2 to obtain a mixed coal sample with the total weight of 10.8 g;
step 3, placing the mixed coal sample in a crucible, and compacting for 60s by using a 150g weight pressing block;
step 4, the crucible is sent into a muffle furnace with the preheating temperature of 850-;
step 5, keeping the temperature for 60min, taking out the coke slag in the crucible, weighing, and recording m1＝7.38g；
Step 6, putting the coke slag into a rotary drum with the inner diameter of 200mm and the depth of 70mm, and rotating at the rotating speed of 50 +/-2 r/min for 5 min;
step 7, screening the coke blocks obtained after the drum rotation by using a 2mm square-hole sieve, weighing oversize materials, and recording m2＝4.53g；
Step 8, with m1As denominator, m2The calculation was performed as a numerator, and the obtained value was recorded as a coking coal suitability index CI of 0.614, that is, the suitability index CI between the coking coals 2 and 1/3 coking coal 2 coal samples was 0.614.
Example 3
Step 1, respectively crushing coking coal 3 and 1/3 coking coal 3 coal samples to be less than 0.5 mm;
and 2, fully and uniformly mixing the two kinds of single coal according to the weight ratio of 1:3 to obtain a mixed coal sample with the total weight of 10.2 g.
Step 3, placing the mixed coal sample in a crucible, and compacting for 30s by using a 150g weight pressing block;
step 4, the crucible is sent into a muffle furnace with the preheating temperature of 850-;
step 5, keeping the temperature for 60min, taking out the coke slag in the crucible, weighing, and recording m1＝7.26g；
Step 6, putting the coke slag into a rotary drum with the inner diameter of 200mm and the depth of 70mm, and rotating at the rotating speed of 50 +/-2 r/min for 5 min;
step 7, screening the coke blocks obtained after the drum rotation by using a 2mm square-hole sieve, weighing oversize materials, and recording the weight as m2＝3.97g；
Step 8, with m1As denominator, m2The value obtained by calculation as a numerator was taken as the coking coal suitability index CI of 0.546, that is, the suitability index CI between the coking coals 3 and 1/3 coking coal 3 coal samples was 0.546.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A method for detecting the suitability of coking coal is characterized by comprising the following steps:
step 1, respectively crushing two single coking coals to design fineness;
step 2, mixing the two single coking coals according to the weight ratio of 1: (1-3) fully and uniformly mixing the raw materials in proportion to obtain a mixed coal sample;
step 3, placing the mixed coal sample in a heating device, and pressing into a coal cake;
step 4, heating and coking the coal cake at constant temperature to obtain coke cake, taking out the coke cake from the heating device and weighing to obtain weight parameter m1；
Step 5, putting the coke cake into a rotary drum, and rotating at the rotating speed of 45-55rad/min for 3-7 min;
and 6, after the rotation is finished, taking out the coke cake, screening the coke cake by using a screen, weighing oversize materials to obtain a weight parameter m2；
Step 7, using m2Divided by m1And recording the obtained numerical value as a coking coal suitability index CI, and finishing the detection.
2. The method for detecting the suitability of coking coal according to claim 1, wherein in step 5, the inner wall of the bottom of the rotary drum comprises a plurality of rib plates for forming an uneven wall surface on the inner wall of the bottom of the rotary drum.
3. The method for detecting the suitability of coking coal according to claim 2, wherein the rib plates are arranged on the inner wall of the rotary drum in pairs and symmetrically, and the height of the rib plates is not more than 30mm, and the thickness of the rib plates is not more than 10 mm.
4. The method for detecting the suitability of coking coal according to claim 1, wherein in step 6, the screen is a square-hole screen having a hole diameter of not more than 2 mm.
5. The method for detecting the suitability of coking coal according to claim 1, wherein in step 1, the design fineness is 2mm or less.
6. The method for detecting the suitability of coking coal as claimed in claim 1, wherein in step 4, when the coal briquette is heated, the coal briquette is heated under a protective atmosphere.
7. The method for detecting the suitability of coking coal as claimed in claim 1, wherein in the step 4, the heating temperature is 850-.
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| CN202010012226.9A CN111122379A (en) | 2020-01-07 | 2020-01-07 | Method for detecting adaptability of coking coal |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103154700A (en) * | 2010-09-01 | 2013-06-12 | 杰富意钢铁株式会社 | Method for evaluating thermal plasticities of coal and caking additive and method for producing coke |
| CN103760105A (en) * | 2014-01-22 | 2014-04-30 | 安徽工业大学 | Measuring method of coal bonding characteristic index under tamping condition |
| CN103808623A (en) * | 2014-02-20 | 2014-05-21 | 武钢集团昆明钢铁股份有限公司 | Method for detecting reactivity and post-reaction strength of coke |
| CN104697833A (en) * | 2015-03-05 | 2015-06-10 | 山东钢铁股份有限公司 | Standard sample for inspecting hot strength of coke and preparation method of standard sample |
| CN109709298A (en) * | 2018-12-29 | 2019-05-03 | 天津钢铁集团有限公司 | A kind of coke inspection by sampling and load in mixture matching method |
-
2020
- 2020-01-07 CN CN202010012226.9A patent/CN111122379A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103154700A (en) * | 2010-09-01 | 2013-06-12 | 杰富意钢铁株式会社 | Method for evaluating thermal plasticities of coal and caking additive and method for producing coke |
| CN103760105A (en) * | 2014-01-22 | 2014-04-30 | 安徽工业大学 | Measuring method of coal bonding characteristic index under tamping condition |
| CN103808623A (en) * | 2014-02-20 | 2014-05-21 | 武钢集团昆明钢铁股份有限公司 | Method for detecting reactivity and post-reaction strength of coke |
| CN104697833A (en) * | 2015-03-05 | 2015-06-10 | 山东钢铁股份有限公司 | Standard sample for inspecting hot strength of coke and preparation method of standard sample |
| CN109709298A (en) * | 2018-12-29 | 2019-05-03 | 天津钢铁集团有限公司 | A kind of coke inspection by sampling and load in mixture matching method |
Non-Patent Citations (6)
| Title |
|---|
| R.ÁLVAREZ等: "An approach to blast furnace coke quality prediction", 《FUEL》 * |
| 中华人民共和国国家质量监督检验检疫总局等: "《中华人民共和国国家标准GB/T4000-2017》", 14 October 2017 * |
| 张世东等: "大比例配无烟煤炼焦生产高 CSＲ 焦炭的研究", 《燃料与化工》 * |
| 李金龙等: "焦炭混合入炉研究", 《河北联合大学学报 ( 自然科学版)》 * |
| 胡德生等: "《焦炭反应性及反应后强度试验方法》中国国家标准的商榷", 《宝钢技术》 * |
| 解俐: "同粒度分布对配合煤、焦炭质量影响", 《山西化工》 * |
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