KR100448727B1 - Method of discriminating weathered coal using oxidation heat - Google Patents
Method of discriminating weathered coal using oxidation heat Download PDFInfo
- Publication number
- KR100448727B1 KR100448727B1 KR1019960065183A KR19960065183A KR100448727B1 KR 100448727 B1 KR100448727 B1 KR 100448727B1 KR 1019960065183 A KR1019960065183 A KR 1019960065183A KR 19960065183 A KR19960065183 A KR 19960065183A KR 100448727 B1 KR100448727 B1 KR 100448727B1
- Authority
- KR
- South Korea
- Prior art keywords
- coal
- weathered
- heat
- weathered coal
- reaction
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
본 발명은 고로용 코크스제조원료 등에 사용되는 석탄의 품질이 열화(산화)된 풍화탄을 판별하는 방법에 관한 것으로써, 석탄을 산화성분위기 하에서 일정한 온도까지 승온하여 방출되는 단위질량당의 총반응열의 감소여부에 의해 풍화탄을 판별하므로써, 짧은시간내에 보다 간단하고 효율적으로 풍화탄을 판별할 수 있는 방법을 제공하고자 하는데, 그 목적이 있다.The present invention relates to a method for determining weathered coal in which the quality of coal used in blast furnace coke is deteriorated (oxidized), and reducing the total heat of reaction per unit mass emitted by heating the coal to a constant temperature under an oxidizing atmosphere. The purpose of the present invention is to provide a method for discriminating weathered coal more simply and efficiently in a short time by discriminating weathered coal based on whether or not it is.
본 발명은 석탄중의 풍화탄을 판별하는 방법에 있어서, 석탄을 산화성분위기 하에서 5℃/분 이상의 승온속도로 600-800℃ 온도영역까지 가열하여 방출되는 단위 질량당의 총반응열이 미풍화탄의 것보다 적은 석탄을 풍화탄이라고 판단하는 산화반응열을 이용한 풍화탄 판별방법을 그 요지로 한다.The present invention is a method for discriminating weathered coal in coal, wherein the total heat of reaction per unit mass emitted by heating coal to a temperature range of 600-800 ° C. at an elevated temperature rate of 5 ° C./min or more under an oxidizing atmosphere is higher than that of uncoated coal. The main point is a method for discriminating weathered coal using heat of oxidation that determines that little coal is weathered coal.
Description
본 발명은 고로용 코크스 제조원료 등에 사용되는 석탄의 품질이 열화(산화)된 풍화탄을 판별하는 방법에 관한 것으로써, 보다 상세하게는 산화반응열을 이용하여 풍화탄을 판별하는 방법에 관한 것이다.The present invention relates to a method for determining weathered coal in which the quality of coal deteriorated (oxidized) used in blast furnace coke production raw materials and the like, and more particularly, relates to a method for discriminating weathered coal using heat of oxidation reaction.
석탄은 태고의 식물이 지하에 매몰되어 장시간에 걸쳐 석탄화된 물질로서, 채광되어 대기(공기)중에 노출되는 순간부터 서서히 풍화되기 시작하여 유동도의 감소, 반사율의 저하, 발열량의 감소와 같은 물성변화가 시작되는 특정을 가진다.Coal is a substance that ancient plants are buried underground and coalified for a long time. Coal is gradually weathered from the moment it is mined and exposed to the atmosphere (air), and it has properties such as decrease of fluidity, decrease of reflectance and decrease of calorific value. It has a specific beginning to change.
이러한 석탄의 풍화현상은 자연현상으로서 회피할 수는 없으나, 고로용 코크스의 제조시에는 코크스품질저하, 발전용 연료로 사용될 경우에는 발열량 저하 등의 문제점을 야기하므로, 원료탄을 효과적으로 이용해야하는 공업적 측면에서는 석탄의 풍화여부를 판별하는 것이 매우 필요한 기술이라고 할 수 있다.Such weathering of coal cannot be avoided as a natural phenomenon, but it causes problems such as deterioration of coke quality in the manufacture of blast furnace coke and lowered calorific value when used as fuel for power generation. It is a very necessary technique to determine whether the coal is weathered.
한편, 풍화탄 판별을 위한 종래의 기술로는, 자장층에서 석탄중의 부대전자(스핀)의 가동변화로부터 석탄의 풍화도를 측정하는 방법(일본 특개공 소 54-110897)이 알려져 있다. 이 방법은 전자스핀 공명분석기(ESR)를 이용하여 원료탄에 흡착된 산소농도증가에 기인하는 부대전자수의 증감현상을 이용하여 풍화도를 측정하는 것으로서, 분석시료의 제조과정에서 부착되는 공기(정확하게는 산소)를 완전히 제거하기 위해 고진공의 탈기작업을 비롯한, 분석시료제조에 장시간이 소요되는 단점이 있다.On the other hand, as a conventional technique for discriminating weathered coal, a method (Japanese Laid-Open Patent Publication 54-110897) for measuring the weathering degree of coal from the change of the operation of the incident electrons (spin) in coal in the magnetic field layer is known. This method uses an electron spin resonance analyzer (ESR) to measure the degree of weathering by increasing or decreasing the number of incident electrons due to the increase in oxygen concentration adsorbed on the raw coal. In order to completely remove the oxygen), there is a disadvantage in that it takes a long time to prepare an analytical sample, including a high vacuum degassing operation.
또한, 석탄중에 함유된 비트리니트 성분의 반사율변화를 이용하여 원료탄의 풍화도를 판정하는 방법(일본 특개공 소61-19143)이 알려져 있는데, 이 방법은 시편의 제작, 표면가공도 향상, 비트리니트의 분리기술 등이 수반되어야 하는 단점이 있다.In addition, a method of determining the weathering degree of raw coal using a change in reflectance of non-trinite components contained in coal is known (Japanese Patent Laid-Open No. 61-19143). There is a disadvantage that the separation technique of the knit should be accompanied.
또한, 풍화탄을 가열할 경우, 발생되는 메탄, 일산화탄소, 이산화탄소 등의 3성분가스 조성변화로부터 풍화도를 판정하는 방법(일본, 특개공 평6-337265(1994년))이 알려져 있는데, 이 방법은 가열시스템에서 시료를 열분해하고, 가스분석기를 이용하여 발생가스의 조성을 분석한 후, 상술한 3성분의 가스조성을 삼각도법으로 표시하는 것으로, 풍화도 판별과정이 복잡한 문제점이 있다.In addition, a method of determining the degree of weathering from changes in composition of three-component gases such as methane, carbon monoxide, and carbon dioxide generated when heating weathered coal (Japanese Patent Publication No. 6-337265 (1994)) is known. The pyrolysis of the sample in the heating system, analysis of the composition of the gas generated by using a gas analyzer, and then displaying the gas composition of the three components described above by a triangulation method, there is a problem of determining the degree of weathering is complicated.
한편, 일본, 특개공 소60-244846(1985년)의 경우, 열중량분석기를 이용하여 미풍화탄과 풍화탄을 불활성가스 분위기하에서 승온함에 따른 중량감소 속도의 차로부터 풍화여부를 판별하는 방법이 알려져 있다.On the other hand, in Japan, Japanese Patent Application Laid-Open No. 60-244846 (1985), a method for determining weathering from the difference in weight loss rate by raising the temperature of un weathered coal and weathered coal in an inert gas atmosphere using a thermogravimetric analyzer is known. have.
이에, 본 발명자들은 상기한 종래방법들의 제반문제점을 해결하기 위하여 연구 및 실험을 행하고, 그 결과에 근거하여 본 발명을 제안하게 된 것으로써, 본 발명은 석탄을 산화성 분위기하에서 승온하여 일정한 온도구간에서 방출되는 단위질량당의 총반응열의 감소여부에 의해 풍화탄을 판별하므로써, 짧은 시간내에 보다 간단하고 효율적으로 풍화탄을 판별할 수 있는 방법을 제공하고자 하는데, 그 목적이 있다.Accordingly, the present inventors conducted research and experiments to solve the above-mentioned problems of the conventional methods, and based on the results, the present invention proposes the present invention. The present invention raises the coal temperature under an oxidizing atmosphere and at a constant temperature range. The purpose of the present invention is to provide a method for discriminating weathered coal more simply and efficiently within a short time by discriminating weathered coal by whether or not the total heat of reaction per unit mass emitted is reduced.
이하, 본 발명에 대하여 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated.
본 발명은 석탄중의 풍화탄을 판별하는 방법에 있어서, 석탄을 산화성분위기 하에서 5℃/분 이상의 승온속도로 600-800℃ 온도영역까지 가열하여 방출되는 단위 질량당의 총반응열이 미풍화탄의 것보다 적은 석탄을 풍화탄이라고 판단하는 산화반응열을 이용한 풍화탄 판별방법에 관한 것이다.The present invention is a method for discriminating weathered coal in coal, wherein the total heat of reaction per unit mass emitted by heating coal to a temperature range of 600-800 ° C. at an elevated temperature rate of 5 ° C./min or more under an oxidizing atmosphere is higher than that of uncoated coal. The present invention relates to a method for discriminating weathered coal by using heat of oxidation reaction in which little coal is considered weathered coal.
이하, 본 발명에 대하여 상세히 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.
본 발명은 시차열분석기를 이용하여 미풍화탄 또는 풍화탄 시료를 산소 또는 공기 등의 산화성가스 분위기하에서 승온함에 있어, 분석시료가 산소와 반응할 때 발생되는 반응열의 차이로부터 풍화탄을 판별하는 것이다. 다시말하면, 산화성 가스분위기하에서 석탄을 승온하면 산소와의 발열반응이 진행됨에 있어, 미풍화탄에서는 산소와의 반응열이 현저한 반면, 이미 산소와의 반응열이 대기중으로 방출되어 버린 풍화탄에서는, 공급되는 산소와의 반응열이 미풍화탄의 경우보다 감소되는데, 본 발명에서는 이를 이용하여, 미풍화탄파 풍화탄을 판별하는 것이다.In the present invention, when the un weathered coal or weathered coal sample is heated in an oxidizing gas atmosphere such as oxygen or air by using a differential thermal analyzer, the weathered coal is discriminated from the difference in reaction heat generated when the analytical sample reacts with oxygen. In other words, when the coal is heated in the oxidizing gas atmosphere, the exothermic reaction with oxygen proceeds. In the unweather coal, the heat of reaction with oxygen is remarkable, whereas in the weathered coal in which the heat of reaction with oxygen has already been released into the atmosphere, the oxygen to be supplied is supplied. The heat of reaction with and is reduced than in the case of unweathered coal, in the present invention, to determine the unweathered coal wave weathering coal.
석탄을 구성하는 주된 원소는 탄소와 수소이며, 질소, 산소등이 소량 함유되어 매우 복잡한 탄화수소화합물의 형태로 존재하고 있다.The main elements that make up coal are carbon and hydrogen, and nitrogen and oxygen are present in the form of highly complex hydrocarbon compounds.
석탄의 풍화기구는 일단 공기중의 산소가 석탄입자표면에 물리.화학적으로흡착되어, 다시말하면, 탄화수소화합물중에 산소와 반응하기 쉬운 반응점에 흡착되어 산화반응이 시작되어 퍼옥사이드(peroxide) 형태의 프리라디칼을 형성한 후, 수산기, 카르보닐기, 카르복실기 등의 함산소관능기의 형태로 전환되어 원료탄중에 존재하게 되는 것이다.The weathering mechanism of coal is once oxygen in the air is physically and chemically adsorbed on the surface of coal particles, that is, it is adsorbed at the reaction point which is easy to react with oxygen in the hydrocarbon compound and the oxidation reaction is started, so that the peroxide type free After forming a radical, it is converted into the form of oxygen functional groups, such as a hydroxyl group, a carbonyl group, and a carboxyl group, and exists in a raw coal.
이러한 산소의 흡착반응은 발열반응이기 때문에, 석탄층의 자연발화현상, 또는 원료탄을 야드에서 파일로 쌓아 장기간 보관할 경우 파일온도의 상승 또는 자연발화의 위험성이 야기되는 것이다. 다시말하면, 풍화탄은 이미 대기중의 산소와 반응하여 이때 발생되는 반응열이 대기중으로 방출된 상태의 물질로 해석할 수 있다.Since the oxygen adsorption reaction is an exothermic reaction, spontaneous ignition of the coal seam, or if the raw coal is stored in piles in the yard for long-term storage, the risk of raising the pile temperature or spontaneous combustion is caused. In other words, the weathered coal can be interpreted as a substance that reacts with oxygen in the atmosphere and the heat of reaction generated at this time is released into the atmosphere.
따라서, 어떤 미풍화탄이 산소와 반응할 때 발생되는 단위질량당의 총반응열은 일정함에 비해, 이것의 풍화탄은 이미 산소와 반응된 것이며 풍화(산화)시에 발생된 반응열은 이미 풍화탄외부로 방출되었기 때문에, 본 발명의 시차열분석기상에서 공급되는 산소와의 반응열은 감소되어, 전체적으로는 단위질량당의 총반응열이 감소하게 된다.Thus, while the total heat of reaction per unit mass generated by the reaction of some un weathered coal with oxygen is constant, its weathered coal is already reacted with oxygen and the heat of reaction generated during weathering (oxidation) is already released outside the weathered coal. As a result, the heat of reaction with oxygen supplied on the differential thermal analyzer of the present invention is reduced, and the total heat of reaction per unit mass is reduced as a whole.
그러므로, 어떤 석탄의 풍화여부를 판별하기 위해서는, 이것의 미풍화탄에 대하여 단위질량당의 총반응열을 측정한 후, 시차열분석기로 측정되는 반응열의 감소경향으로부터 동석탄의 풍화정도를 판별할 수 있다.Therefore, in order to determine whether the coal is weathered, the total heat of reaction per unit mass of the uncoated coal can be measured, and then the degree of weathering of the copper coal can be determined from the decreasing trend of the heat of reaction measured by a differential thermal analyzer.
한편, 풍화탄에 있어 산소와의 반응열의 감소경향은 산소가 석탄에 흡착되기 쉬운 200-400℃의 저온영역에서 현저하게 나타나므로, 이로 인해 시차열분석기의 반응열변화곡선의 형태에 차이가 있게 되므로 총반응열의 변화와 함께 풍화도의 판정에 이용될 수가 있다.On the other hand, the decreasing tendency of reaction heat with oxygen in weathered coal is remarkable in the low temperature range of 200-400 ° C. where oxygen is easily adsorbed by coal, and therefore, there is a difference in the shape of the reaction heat change curve of the differential thermal analyzer. It can be used to determine the degree of weathering with the change in total heat of reaction.
다시말하면, 미풍화탄의 산화반응에서는 상기 저온영역에서 발열반응이 현저하지만, 풍화탄의 산화반응에는, 이 온도영역에서의 반응열이 급감되어 반응열분포곡선에 차이를 나타내는데, 이로부터 석탄의 풍화여부를 판별할 수 있는 것이다.In other words, in the oxidation reaction of unweathered coal, the exothermic reaction is remarkable in the low temperature region, but in the oxidation reaction of the weathered coal, the heat of reaction in the temperature region is drastically reduced, resulting in a difference in the reaction heat distribution curve. It can be determined.
본 발명에 보다 바람직하게 적용될 수 있는 석탄은 코크스제조용으로 사용되는, 휘발분함량이 15-35%인 석탄이다. 또한, 본 발명에 있어 풍화탄 판별용 석탄의 입도는 균일한 것이 바람직하다. 왜냐하면, 시차열분석기를 이응하는 경우, 입도변화에 의한 산화반응속도의 영향이 관여되는 것을 방지하기 위함이다. 바람직한 석탄의 입도는 100메쉬(150㎛)이하이다.Coal which may be more preferably applied to the present invention is coal having a volatile content of 15-35%, which is used for producing coke. Moreover, in this invention, it is preferable that the particle size of the coal for weathering coal discrimination is uniform. This is because the response of the differential thermal analyzer is to prevent the influence of the oxidation reaction rate due to the particle size change. Preferred particle size of coal is 100 mesh (150 mu m) or less.
시차열분석기를 이용하여 석탄을 산화성분위기하에서 승온시키는 경우 승온속도는 측정시간의 효율성을 도모하는 측면에서 5℃/분 이상이 바람직하며, 보다 바람직한 승온속도는 5-15℃/분이다.In the case of raising the temperature of coal under an oxidizing atmosphere using a differential thermal analyzer, the temperature increase rate is preferably 5 ° C./min or more, and more preferably 5-15 ° C./min in terms of improving the efficiency of the measurement time.
그리고, 승온속도차에 의해 반응열 변화곡선이 고온 또는 저온쪽으로 이동되는 현상을 방지하여 판결정도를 향상시키기 위하여 승온속도는 일정한 것이 바람직하다.In addition, the temperature increase rate is preferably constant in order to prevent the phenomenon that the reaction heat change curve is shifted toward the high or low temperature due to the temperature increase rate to improve plate crystallinity.
또한, 본 발명에 있어 최고 승온속도를 600-800℃로 제한한 이유는 시차열분석기의 분석결과로 부터 얻어진 반응열변화곡선의 하부면적이 단위질량당 총반응열로 전환됨을 고려할 때 각곡선의 면적을 구함에 있어 명백한 베이스라인을 얻기 위함이며, 보다 바람직한 최종승온온도는 700-800℃이다.In addition, in the present invention, the reason for limiting the maximum temperature increase rate to 600-800 ° C. is that the lower area of the reaction heat change curve obtained from the analysis result of the differential thermal analyzer is converted into the total heat of reaction per unit mass. In order to obtain a clear baseline in obtaining, a more preferable final elevated temperature is 700-800 ° C.
본 발명에서 석탄의 승온시 분위기는 공기, 산소 또는 오존 등의 산화성 분위기이어야 한다.In the present invention, the atmosphere at the time of heating up the coal should be an oxidizing atmosphere such as air, oxygen or ozone.
이하, 실시예를 통하여 본 발명을 보다 구체적으로 설명한다.Hereinafter, the present invention will be described in more detail with reference to Examples.
실시예1Example 1
공업분석에 의한 휘발분함량이 16.9%로 매우 낮으며, 원소분석에 의한 탄소함량이 92.2%인 석탄화도가 높은 SR탄을 100메쉬이하로 분쇄한 후, 시차열분석기를 이용하여 공기분위기하에서 10℃/분의 승온속도로 800℃까지 가열할 때 반응열곡선을 조사하고, 그 결과를 제1도의 (가)에, 동시료를 대기중에 1개월간 방치하여 풍화시킨 풍화탄을 동일조건에서 가열할 때 발생되는 반응열곡선을 조사하고, 그 결과를 제1도의 (나)에 나타내었다. 제1도에 나타난 바와같이, 미풍화탄과 풍화탄은 200-400℃의 저온영역에서 반응열에 있어 현저한 차이를 나타내고 있다.The volatilized SR coal, which has a very low volatile content of 16.9% by industrial analysis and a 92.2% carbon content by elemental analysis, was pulverized to less than 100 mesh, and then subjected to a differential thermal analyzer at 10 ° C under an air atmosphere. The reaction heat curve is investigated when heating to 800 ℃ at the temperature increase rate per minute, and the result is shown in (a) of FIG. 1, and the result is when the weathered coal is heated under the same conditions by allowing the same material to stand in air for 1 month. The reaction heat curve was investigated and the result is shown in (b) of FIG. As shown in FIG. 1, un weathered coal and weathered coal show a significant difference in the heat of reaction in the low temperature region of 200-400 ° C.
한편, 제1도의 반응열곡선으로 부터 구한 단위질량당 총반응열을 구하고 그 결과를 하기표 1에 나타내었다. 하기 표1에 나타난 바와같이, 풍화탄은 미풍화탄에 비해 반응열이 8.9% 감소되어 있는 것을 알 수 있는데, 이로부터 풍화탄을 판별할 수 있음을 알 수 있다.On the other hand, the total heat of reaction per unit mass obtained from the heat curve of FIG. 1 was obtained and the results are shown in Table 1 below. As shown in Table 1 below, it can be seen that weathering coal has a 8.9% decrease in reaction heat compared to unweathered coal, and it can be seen from the weathering coal.
[표1]Table 1
실시예2Example 2
공업분석에 의한 휘발분함량이 32.8%로 매우 높은 HM탄에 대하여 미풍화탄과 풍화탄을 각각 100메쉬이하로 분쇄한 후, 시차열분석기클 이용하여 공기분위기하에서 10℃/분의 승온속도로 800℃까지 가열할 때 발생되는 반응열곡선을 제2도의 (가)에, 동시료를 대기중에 1개월간 방치하여 풍화시킨 풍화탄을 동일조건에서 가열할 때 발생되는 반응열 곡선을 제2도의 (나)에 나타내었다. 또한 이들 곡선의 면적으로 구한 단위질량당 총반응열을 하기 표2에 나타내었다. 하기표2에 나타난 바와같이, 미풍화탄에 비해 풍화탄의 단위질량당 총반응열이 33.8%로 현저하게 감소됨을 알 수 있는데, 이로부터 풍화탄을 판별할 수 있음을 알 수 있다. 더우기, 본 발명의 풍화탄 판별방법은 고휘발분탄에 더욱 효과적임을 알 수 있다.After pulverizing un weathered coal and weathered coal at 100 mesh or less for HM coal having a very high volatile content of 32.8% by industrial analysis, the temperature difference was 800 ° C. at 10 ° C./min in an air atmosphere using a differential thermal analyzer. Figure 2 shows the reaction heat curves generated when heating up to (a) of Figure 2 and the heat curves generated when the weathered coals heated by weathering the weathered coal for 1 month in the air under the same conditions. It was. The total heat of reaction per unit mass determined by the area of these curves is shown in Table 2 below. As shown in Table 2 below, it can be seen that the total heat of reaction per unit mass of the weathered coal is significantly reduced to 33.8% compared to the un weathered coal, from which the weathered coal can be determined. Moreover, it can be seen that the weathering coal discrimination method of the present invention is more effective for high volatility coal.
[표2][Table 2]
실시예3Example 3
공업분석에 의한 휘발분함량이 23.8%인 GY탄에 대하여 미풍화탄과 풍화탄을 각각 100메쉬이하로 분쇄한 후, 시차열분석기를 이용하여 공기분위기하에서 10℃/분의 승온속도로 800℃까지 가열할 때 발생되는 단위질량당 총반응열과 동시료를 대기중에서 1개월간 방치하여 풍화시킨 풍화탄을 동일조건에서 처리함에 따른 단위질량당의 총반응열을 하기 표3에 나타내었다.After grinding the weathered coal and weathered coal to 100 mesh or less for GY coal having 23.8% of volatile content by industrial analysis, it was heated to 800 ℃ at 10 ℃ / min in a air atmosphere using a differential thermal analyzer. The total heat of reaction per unit mass and the total heat of reaction per unit mass according to treatment of weathered coals weathered by weathering coals left for one month in the air under the same conditions are shown in Table 3 below.
[표3]Table 3
상기 표3에 나타난 바와같이, 미풍화탄에 비해 풍화탄의 단위질량당 총반응열이 10.3% 감소됨을 알 수 있는데, 이로부터 미풍화탄과 풍화탄의 판별이 가능함을 알 수 있다.As shown in Table 3 above, it can be seen that the total heat of reaction per unit mass of the weathered coal is reduced by 10.3% compared to the un weathered coal. From this, it can be seen that the un weathered coal and the weathered coal can be discriminated.
실시예4Example 4
공업분석에 의한 휘발분함량이 20.5%인 PD탄에 대하여 미풍화탄과 풍화탄을 각각 100메쉬이하로 분쇄한 후, 시차열분석기를 이용하여 공기분위기하에서 10℃/분의 승온속도로 800℃까지 가열할 때 발생되는 단위질량당 총반응열과 동시료를 대기중에서 1개월간 방치하여 풍화시킨 풍화탄을 동일조건에서 처리함에 따른 단위질량당의 총반응열을 하기 표4에 나타내었다.Uncoated coal and weathered coal were pulverized to 100 mesh or less for PD coal having 20.5% volatile content according to industrial analysis, and then heated to 800 ° C at a temperature rising rate of 10 ° C / min using an air differential analyzer using a differential thermal analyzer. The total heat of reaction per unit mass and the heat of reaction per unit mass according to the treatment of weathered coals weathered by weathering coals left for one month in the air under the same conditions are shown in Table 4 below.
[표4]Table 4
상기 표4에 나타난 바와같이, 미풍화탄에 비해 풍화탄의 단위질량당 총반응열이 15.8% 감소됨을 알 수 있는데, 이로부터 미풍화탄과 풍화탄의 판별이 가능함을 알 수 있다.As shown in Table 4, it can be seen that the total heat of reaction per unit mass of the weathered coal is reduced by 15.8% compared to the un weathered coal. From this, it can be seen that the un weathered coal and the weathered coal can be discriminated.
상술한 바와같이, 본 발명은 석탄을 산화성분위기하에서 승온하여 일정한 온도구간에서 방출되는 단위질량당의 총반응열의 감소여부에 의해 풍화탄을 판별하므로써, 짧은시간내에 보다 간단하고 효율적으로 풍화탄을 판별할 수 있는 효과가 있는 것이다.As described above, the present invention can determine the weathered coal more simply and efficiently in a short time by determining the weathered coal by reducing the total heat of reaction per unit mass emitted by raising the coal temperature under the oxidizing atmosphere. It can be effective.
제1도-제2도 : 미풍화탄과 풍화탄을 공기분위기하에서 승온할 때 온도에 따른 발열량변화를 나타내는 그래프1 to 2: Graph showing the change of calorific value according to temperature when unweathered coal and weathered coal are heated in air atmosphere
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960065183A KR100448727B1 (en) | 1996-12-13 | 1996-12-13 | Method of discriminating weathered coal using oxidation heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960065183A KR100448727B1 (en) | 1996-12-13 | 1996-12-13 | Method of discriminating weathered coal using oxidation heat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19980046779A KR19980046779A (en) | 1998-09-15 |
| KR100448727B1 true KR100448727B1 (en) | 2004-12-30 |
Family
ID=49516215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960065183A KR100448727B1 (en) | 1996-12-13 | 1996-12-13 | Method of discriminating weathered coal using oxidation heat |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100448727B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20240023973A (en) | 2022-08-16 | 2024-02-23 | 장영식 | ice pack for cold compress |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60244846A (en) * | 1984-05-21 | 1985-12-04 | Kansai Coke & Chem Co Ltd | Method for discriminating degree of oxidation of coal |
| JPS62187239A (en) * | 1986-02-13 | 1987-08-15 | Kansai Coke & Chem Co Ltd | Method for measuring coal control index |
| JPH06337265A (en) * | 1993-05-28 | 1994-12-06 | Kansai Coke & Chem Co Ltd | Method for deciding weathering of coal |
-
1996
- 1996-12-13 KR KR1019960065183A patent/KR100448727B1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60244846A (en) * | 1984-05-21 | 1985-12-04 | Kansai Coke & Chem Co Ltd | Method for discriminating degree of oxidation of coal |
| JPS62187239A (en) * | 1986-02-13 | 1987-08-15 | Kansai Coke & Chem Co Ltd | Method for measuring coal control index |
| JPH06337265A (en) * | 1993-05-28 | 1994-12-06 | Kansai Coke & Chem Co Ltd | Method for deciding weathering of coal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20240023973A (en) | 2022-08-16 | 2024-02-23 | 장영식 | ice pack for cold compress |
Also Published As
| Publication number | Publication date |
|---|---|
| KR19980046779A (en) | 1998-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Perry et al. | Application of XPS to coal characterization | |
| Hu et al. | Non-isothermal TGA study on the combustion reaction kinetics and mechanism of low-rank coal char | |
| Manning et al. | Oxygen self-diffusion and surface exchange studies of oxide electrolytes having the fluorite structure | |
| Kumar et al. | Influence of carbonization conditions on the gasification of acacia and eucalyptus wood chars by carbon dioxide | |
| Green et al. | Stable radicals formation in coals undergoing weathering: effect of coal rank | |
| Lu et al. | Coal char reactivity and structural evolution during combustion—Factors influencing blast furnace pulverized coal injection operation | |
| Elder | Proximate analysis by automated thermogravimetry | |
| Ghetti | DTG combustion behaviour of coal: Correlations with proximate and ultimate analysis data | |
| Villey et al. | Influence of elemental composition on carbonization pyrolysis of sporopollenin and lignite as models of kerogens | |
| KR100448727B1 (en) | Method of discriminating weathered coal using oxidation heat | |
| Zhang et al. | The mechanism of microwave-induced phase transformation and sulfur conversion in gold-bearing pyrite under inert atmospheres | |
| CN111433330A (en) | Method for producing modified coal | |
| Murakami et al. | Effect of types of carbonaceous material and CaO addition on reduction behavior of pre-reduced iron ore–carbon composite | |
| US9802825B2 (en) | Process for manufacturing silicon carbide | |
| Huan et al. | Structural evolution of a bituminous coal char related to its synchronized gasification behavior with H2O and/or CO2 | |
| Wang et al. | Investigation of the Properties and Reactivity of Biocarbons at High Temperature in Mixture of CO/CO2 | |
| Burchill et al. | Studies of coals and binder systems for smokeless fuel briquettes | |
| Rousset et al. | Comparing four bio-reducers self-ignition propensity by applying heat-based methods derived from coal | |
| US6013530A (en) | Process for determination of sulfur content | |
| Cronauer et al. | Liquefaction of partially dried and oxidized coals: 1. Coal drying and oxidation | |
| de Andrés et al. | The influence of mineral matter and carbonization conditions on nitrogen release during coal combustion | |
| KR19980046778A (en) | Weathering coal discrimination method using thermogravimetric analyzer | |
| Ramos et al. | Reactivity assessment of charcoal for use in silicon production | |
| Weeda et al. | Anomalous carbon dioxide gasification behaviour of high temperature coal chars | |
| Hu et al. | Crystalline structure development of coal during low-temperature oxidation under lean-oxygen environments caused by methane emission in gob |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20120903 Year of fee payment: 9 |
|
| FPAY | Annual fee payment |
Payment date: 20130903 Year of fee payment: 10 |
|
| LAPS | Lapse due to unpaid annual fee |