KR101149118B1 - Method for improving cold strength and hot strength of coke - Google Patents
Method for improving cold strength and hot strength of coke Download PDFInfo
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- KR101149118B1 KR101149118B1 KR1020100061255A KR20100061255A KR101149118B1 KR 101149118 B1 KR101149118 B1 KR 101149118B1 KR 1020100061255 A KR1020100061255 A KR 1020100061255A KR 20100061255 A KR20100061255 A KR 20100061255A KR 101149118 B1 KR101149118 B1 KR 101149118B1
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- 239000000571 coke Substances 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000003245 coal Substances 0.000 claims abstract description 89
- -1 silane compound Chemical class 0.000 claims abstract description 41
- 229910000077 silane Inorganic materials 0.000 claims abstract description 39
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 238000004132 cross linking Methods 0.000 claims abstract description 13
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 7
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 14
- 125000000217 alkyl group Chemical group 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- PHQOGHDTIVQXHL-UHFFFAOYSA-N n'-(3-trimethoxysilylpropyl)ethane-1,2-diamine Chemical compound CO[Si](OC)(OC)CCCNCCN PHQOGHDTIVQXHL-UHFFFAOYSA-N 0.000 claims description 5
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 3
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 230000000052 comparative effect Effects 0.000 description 7
- 238000011068 loading method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical group [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 3
- 125000002947 alkylene group Chemical group 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- 239000002802 bituminous coal Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 150000004756 silanes Chemical class 0.000 description 3
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 2
- 239000003830 anthracite Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 150000002828 nitro derivatives Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
- C10B57/06—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition containing additives
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
본 발명은 코크스의 냉간강도 및 열간강도 향상방법에 관한 것으로, 본 발명은 석탄에 가교 반응을 일으키는 가교제로 실란화합물을 첨가하고, 상기 실란화합물을 첨가한 석탄을 코크스 오븐 설비에 장입하여 가열 건류함으로써 코크스를 제조한다.
본 발명은 실란화합물 첨가를 통해 석탄의 품질에 의존하지 않고도 코크스의 강도를 향상시키는 것이 가능하므로 코크스 제조를 위한 석탄 선택의 폭을 넓힐 수 있는 이점이 있다.The present invention relates to a method of improving the cold strength and hot strength of coke, and the present invention is to add a silane compound as a crosslinking agent to cause a crosslinking reaction to coal, and to charge the coal with the silane compound in a coke oven to heat and dry Coke is prepared.
The present invention has the advantage that it is possible to improve the strength of the coke without depending on the quality of the coal through the addition of the silane compound has a wide range of coal selection for coke production.
Description
본 발명은 코크스의 냉간강도 및 열간강도 향상방법에 관한 것으로, 더욱 상세하게는 실란화합물 첨가를 통한 코크스의 냉간강도 및 열간강도 향상방법에 관한 것이다.The present invention relates to a method for improving cold strength and hot strength of coke, and more particularly, to a method for improving cold strength and hot strength of coke through the addition of a silane compound.
코크스는 고로의 열원으로 사용되는 연료인 동시에 철광석을 환원시키는 환원제의 역할을 한다. 코크스는 석탄을 코크스 오븐 설비에서 가열 건류하여 제조한다. Coke is a fuel used as a heat source for blast furnaces and also serves as a reducing agent for reducing iron ore. Coke is produced by heating and coal drying coal in a coke oven plant.
코크스 제조용 석탄은 건류시에 점결이 잘 이루어질 수 있는 점결성을 가져야 하므로 원료로는 역청탄이 많이 사용된다. 코크스 제조에 이용되는 석탄을 일반적인 연료용과 구분하여 원료탄이라 칭한다. Coal making coal has a coking property that can be caking well during dry distillation, so bituminous coal is used as a raw material. Coal used in the coke production is called raw coal separately from general fuels.
코크스는 열원과 환원제로서의 역할뿐만 아니라 노내의 통기성을 좋게 하는 역할을 위하여 어느 정도의 품질평가 기준을 만족해야 한다. Coke must meet some quality criteria for its role as a heat source and reducing agent, as well as for improving the ventilation in the furnace.
코크스의 품질평가 기준으로 냉간(상온)강도와 열간강도가 있다. 냉간강도와 열간강도는 코크스가 운반 중 또는 노내에서 붕괴되지 않도록 적정한 강도를 유지하기 위해 요구된다.Coke quality evaluation criteria include cold (room temperature) and hot strength. Cold strength and hot strength are required to maintain adequate strength so that coke does not collapse during transportation or in the furnace.
본 발명의 목적은 실란화합물 첨가를 통하여 석탄 품질에 의존하지 않고도 코크스의 강도를 유지할 수 있도록 한 코크스의 냉간강도 및 열간강도 향상방법을 제공하는 것이다. It is an object of the present invention to provide a method of improving the cold strength and hot strength of coke to maintain the strength of coke without relying on coal quality through the addition of silane compounds.
상기한 바와 같은 목적을 달성하기 위한 본 발명의 특징에 따르면, 본 발명은 석탄에 가교 반응을 일으키는 가교제로 하기의 <화학식1>로 표시되는 실란화합물을 첨가하고, 상기 실란화합물을 첨가한 석탄을 코크스 오븐 설비에 장입하여 가열 건류함으로써 코크스를 제조한다.
<화학식1>
R-Si(OR')n
[R은 페닐기, 멀켑토기, 프로필기, 아미노에칠아미노프로필기로 이루어진 군으로부터 선택되고, R'는 CH3기(알킬기) 그룹으로부터 선택되며, n은 3이다.]According to a feature of the present invention for achieving the above object, the present invention is to add a silane compound represented by the following <Formula 1> as a crosslinking agent causing a crosslinking reaction to the coal, the coal to which the silane compound is added Coke is manufactured by charging into a coke oven installation and heat-drying.
<Formula 1>
R-Si (OR ') n
[R is selected from the group consisting of a phenyl group, a multo earth group, a propyl group, an aminoethylaminopropyl group, R 'is selected from a CH 3 group (alkyl group) group, and n is 3.]
상기 실란화합물은 페닐트리메톡시실란, 멀켑토트리메톡시실란, 프로필트리메톡시실란, 아미노에칠아미노프로필트리메톡시실란 중 선택된 1종이다.The said silane compound is 1 type selected from a phenyl trimethoxysilane, a merceto trimethoxysilane, propyl trimethoxysilane, and amino ethylaminopropyl trimethoxysilane.
상기 실란화합물은 상기 석탄 총중량 대비 3.0wt% 이상 30.0wt% 이하 범위로 첨가된다.The silane compound is added in the range of 3.0wt% or more and 30.0wt% or less with respect to the total weight of coal.
상기 실란화합물은 5~30nm의 입자크기를 갖는다.The silane compound has a particle size of 5 ~ 30nm.
상기 코크스 오븐 설비의 노 온도는 1110~1120℃로 유지하고 상기 노에서 석탄의 가열시간은 석탄의 중심부 온도가 850~950℃에 도달 후 1~3시간 유지한다. The furnace temperature of the coke oven equipment is maintained at 1110 ~ 1120 ℃ and the heating time of the coal in the furnace is maintained for 1 to 3 hours after the central temperature of the coal reaches 850 ~ 950 ℃.
본 발명은 실란화합물 첨가를 통한 석탄 내에서의 가교 반응에 의해 코크스의 강도를 향상시킨다. 이는 석탄의 품질에 의존하지 않고도 코크스의 강도를 향상시키므로 코크스 제조를 위한 석탄 선택의 폭을 넓힐 수 있다. 따라서 제조원가를 절감하면서도 생산성 및 코크스 품질의 향상을 가져올 수 있는 유용한 효과가 있다.The present invention improves the strength of coke by crosslinking reactions in coal through the addition of silane compounds. This improves the strength of the coke without relying on the quality of the coal, thus broadening the choice of coal for coke production. Therefore, there is a useful effect that can bring about improved productivity and coke quality while reducing manufacturing costs.
도 1은 실란화합물 첨가를 통한 석탄 내에서의 가교 반응을 보인 모식도.1 is a schematic diagram showing a crosslinking reaction in coal through the addition of a silane compound.
이하, 본 발명을 첨부된 도면을 참조하여 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.
본 발명은 석탄에 가교 반응을 일으키는 가교제를 첨가하고, 가교제를 첨가한 석탄을 코크스 오븐 설비에 장입하여 가열 건류함으로써 코크스를 제조한다.This invention adds the crosslinking agent which produces a crosslinking reaction to coal, and charges the coal which added the crosslinking agent to the coke oven installation, and heat-drys it to manufacture coke.
코크스의 냉간강도와 열간강도는 석탄의 여러가지 성상 중 점결성에 의해 좌우된다. 점결성이 우수한 석탄(저반응성)과 그렇지 못한 석탄(고반응성)을 균일하게 혼합하여 점결성분과 불활성성분을 적절히 조화시키면 높은 강도의 코크스를 제조할 수 있다.The cold and hot strength of the coke depends on the coking properties among the various properties of coal. High coke can be produced by uniformly mixing the caking component and the inert component by uniformly mixing coal (low reactivity) and coal (high reactivity) which are not excellent in caking.
코크스의 강도는 제조 공정 조건에 영향을 받기도 하지만 석탄 품질에 따라 코크스의 강도가 결정된다. 이러한 이유로 석탄 품질에 따라 코크스의 강도 및 제조비용이 결정된다.The strength of the coke is influenced by the manufacturing process conditions, but the quality of the coal determines the strength of the coke. For this reason, the quality of the coke determines the strength and cost of the coke.
따라서 본 발명에서는 석탄 품질에 의존하지 않고 가교제 첨가를 통하여 코크스 강도를 향상시킨다. 석탄 품질에 의존하지 않고 코크스 강도를 향상시키면 석탄 선택의 폭이 넓어질 뿐 아니라 석탄의 품질이 의존하지 않아도 되므로 코크스 제조 원가를 경감할 수 있다.Therefore, the present invention improves coke strength through the addition of a crosslinking agent without depending on coal quality. Improving the coke strength without relying on coal quality can lead to a wider range of coal choices and reduce the cost of coke production because the quality of the coal does not have to depend on it.
가교제는 하기의 <화학식1>로 표시되는 실란화합물을 사용한다.
<화학식1>
R-Si(OR')n
[R은 페닐기, 멀켑토기, 프로필기, 아미노에칠아미노프로필기로 이루어진 군으로부터 선택되고, R'는 CH3기(알킬기) 그룹으로부터 선택되며, n은 3이다.]The crosslinking agent uses a silane compound represented by the following <Formula 1>.
<Formula 1>
R-Si (OR ') n
[R is selected from the group consisting of a phenyl group, a multo earth group, a propyl group, an aminoethylaminopropyl group, R 'is selected from a CH 3 group (alkyl group) group, and n is 3.]
실란화합물은 석탄내의 유기성분과 가교 반응을 일으켜 코크스의 강도를 향상시킨다. 가교 반응은 사슬모양의 구조를, 도 1에 도시된 바와 같이, 망상구조(3차원 그물구조)로 바꿔 거대한 분자형태로 커지므로 인장강도를 증가시키는 역할을 한다. 인장강도 증가에 따라 냉간강도 및 열간강도가 향상된다.The silane compound crosslinks with the organic components in the coal to improve the coke strength. The crosslinking reaction serves to increase the tensile strength since the chain-shaped structure, as shown in FIG. 1, is changed into a network structure (three-dimensional network structure) and grows into a large molecular form. As tensile strength increases, cold and hot strengths improve.
실란화합물은 입자크기가 5~30nm인 것을 첨가한다. 실란화합물은 이 입자크기에서 50~500㎡/g의 표면적으로 가지며, 이 표면에서 실란기(Si-OR)가 존재한다. 표면에 실란기가 존재하면 친수성 및 표면에너지가 높아져 가교 반응이 촉진된다. 이때, 가교 반응은 실란기의 R이 떨어져 나가면서 O에 석탄이 부착되는 방식으로 진행된다.The silane compound is added with a particle size of 5 ~ 30nm. The silane compound has a surface area of 50 to 500 m < 2 > / g at this particle size, and a silane group (Si-OR) is present on this surface. The presence of silane groups on the surface increases the hydrophilicity and surface energy to promote the crosslinking reaction. At this time, the crosslinking reaction proceeds in such a way that coal is attached to O while R of the silane group is separated.
실란화합물의 입자크기는 5nm 미만은 공정상 제조가 어렵고, 30nm를 초과하면 가교 반응이 저하된다.If the particle size of the silane compound is less than 5 nm in process, it is difficult to manufacture, and if it exceeds 30 nm, the crosslinking reaction is lowered.
실란화합물은 석탄 총중량 대비 3.0wt% 이상 30.0wt% 이하 범위로 첨가된다. 실란화합물은 석탄 총중량 대비 3.0wt% 미만으로 첨가되면 가교 반응이 미비하여 코크스의 열간강도 및 냉간강도 향상 효과가 없고, 30.0wt%를 초과하여 첨가되면 실란화합물 입자간 응집으로 코크스 강도를 저하시키거나 그 효과가 포화되며 후공정인 고로 공정에도 영향을 미치게 된다. The silane compound is added in a range of 3.0 wt% or more and 30.0 wt% or less based on the total weight of coal. When the silane compound is added at less than 3.0wt% of the total weight of coal, the crosslinking reaction is insufficient to improve the hot and cold strength of the coke. If the silane compound is added at more than 30.0wt%, the coke strength is reduced by aggregation of the silane compound particles. The effect is saturated and affects the blast furnace process as a post process.
실란화합물은 말단기가 방향족(Aromatic), 알킬(Alkyl), 알킬렌(Alkylene), 니트로(Nitriro) 화합물 중 선택된 1종이 사용될 수 있다.As the silane compound, one group selected from among aromatic (Aromatic), alkyl (Alkyl), alkylene (Alkylene), and nitriro compounds may be used.
아로마텍, 알킬, 알킬렌, 니트로 화합물의 예로는 각각 페닐트리메톡시실란, 멀켑토트리메톡시실란, 프로필트리메톡시실란, 아미노에칠아미노프로필트리메톡시실란이 채용된다.Examples of the aromatech, alkyl, alkylene and nitro compounds include phenyltrimethoxysilane, multototrimethoxysilane, propyltrimethoxysilane and aminoethylaminopropyltrimethoxysilane.
이 중 실란화합물은 코크스 냉간강도 및 열간강도 향상을 위해 말단기가 방향족인 페닐트리메톡시실란을 채용하는 것이 바람직하다.Among the silane compounds, it is preferable to employ phenyltrimethoxysilane having an aromatic terminal group in order to improve coke cold strength and hot strength.
한편, 코크스 제조시 실란화합물을 첨가한 석탄의 장입밀도는 740~760kg/m3이다. 장입밀도가 높을수록 건류 후 코크스의 품질 즉, 강도가 높게 나타난다. 장입밀도는 장입되는 석탄의 수분에 의해 좌우된다. 석탄의 수분을 낮추기 위해서는 대규모의 설비투자가 요구되어 원가상승 요인이 된다. On the other hand, the loading density of coal to which the silane compound is added in the coke production is 740 ~ 760kg / m 3 . The higher the loading density, the higher the coke quality, i.e., strength, after drying. The loading density depends on the moisture of the coal to be charged. In order to reduce the moisture of coal, large-scale facility investment is required, which leads to a cost increase.
석탄의 수분 함량은 7.7~8.3wt%이다. 석탄의 수분 함량은 낮으면 장입밀도를 높인다. 그러나 낮은 수분 함량은 수송시 분진을 발생시켜 대기를 오염시킬 수 있고, 특히, 하한치가 7.7wt% 미만이 되기 위해서는 대규모의 설비투자가 요구되는 문제점이 있다.The moisture content of coal is 7.7-8.3 wt%. Low moisture content of coal increases the loading density. However, the low moisture content may generate dust during transport and pollute the air, and in particular, there is a problem that requires a large-scale investment in the lower limit to be less than 7.7wt%.
코크스 오븐 설비의 노 온도는 1110~1120℃이다. 노 온도는 코크스의 강도와 관련되는 것으로 위 범위보다 낮으면 강도 확보가 어렵고, 위 온도보다 높으면 취성이 발생할 수 있다. The furnace temperature of the coke oven plant is 1110-1120 ° C. The furnace temperature is related to the strength of the coke and if it is lower than the above range, it is difficult to secure the strength, and if it is higher than the above temperature, brittleness may occur.
실란화합물이 첨가된 석탄은 노에 장입된 후 중심부 온도가 850~950℃에 도달한 후 1~3시간, 보다 정확하게는 2시간 유지하는 가열 건류를 통하여 코크스로 제조된다. 이 과정에서 석탄 내부의 휘발분과 CO, CO2 등의 배가스가 배출되어 코크스로 제조된다. 제조된 코크스의 주성분은 탄소이며, 수소, 질소, 황, 산소가 소량 포함된다.Coal added with the silane compound is made of coke through heated dry distillation which is maintained for 1 to 3 hours, more precisely 2 hours after the core temperature reaches 850 to 950 ° C. In this process, volatile matter inside the coal and flue gas such as CO and CO 2 are discharged to produce coke. The main component of the coke produced is carbon, and contains a small amount of hydrogen, nitrogen, sulfur, and oxygen.
가열온도도 코크스의 강도와 관련된다. 위 범위를 만족하지 않으면 강도 확보가 어렵고, 과도한 가열은 취성을 증가시킬 수 있다.
The heating temperature is also related to the strength of the coke. If the above range is not satisfied, it is difficult to secure the strength, and excessive heating may increase brittleness.
본 발명의 실시예를 다른 비교예와 대비하여 설명한다. 그러나 하기 실시예는 본 발명을 예시하는 것일 뿐, 본 발명이 하기 실시예에 의해 한정되는 것은 아니다. Examples of the present invention will be described in comparison with other comparative examples. However, the following examples are merely to illustrate the invention, the present invention is not limited by the following examples.
<실시예 1>≪ Example 1 >
저휘발분 석탄과 고휘발분 석탄에 표 1의 실란화합물을 첨가하고, 코크스 오븐 설비에 장입하여 가열 건류함으로써 코크스를 제조한 후 코크스의 강도를 측정하였다. The silane compound of Table 1 was added to low volatile coal and high volatile coal, it charged to the coke oven installation, and heated and dried to produce coke, and measured the coke strength.
이때, 코크스 제조조건은 아래와 같이 하였다.At this time, the coke production conditions were as follows.
- 실란화합물 입자크기: 25nm-Silane compound particle size: 25nm
- 장입밀도: 750kg/m3 -Loading Density: 750kg / m 3
- 수분: 8.0±0.3%Moisture: 8.0 ± 0.3%
- 로 온도: 1150℃Furnace temperature: 1150 ℃
- 가열온도(soaking time): 석탄 중심부 온도 900℃ 도달 후 2시간 유지함.Soaking time: Maintained for 2 hours after reaching 900 ℃ of coal core temperature.
여기서, 저휘발분 석탄은 휘발분이 3~7%이고, 고휘발분 석탄은 휘발분 34~36%인 석탄에 해당된다. 저휘발분 석탄의 예로는 무연탄이 있고, 고휘발분 석탄의 예로는 역청탄이 있다. 실란화합물은 입자크기가 5wt%인 것을 사용하였다.Here, the low volatile coal is 3 to 7% volatile matter, the high volatile coal corresponds to 34 to 36% volatile coal. An example of low volatile coal is anthracite and an example of high volatile coal is bituminous coal. As the silane compound, a particle size of 5 wt% was used.
division
Tanjong
(wt%)Silane compound
(wt%)
Remarks
(후공정에 영향을 미침)Comparative example
(Affects post-processing)
표 1에 의하면, 실란화합물을 첨가한 경우 코크스 강도가 증가하는 경향을 보이며, 이 중 3.0~50.0wt% 범위의 페닐트리메톡시실란을 첨가한 경우 코크스 강도가 더욱 증가하였다. According to Table 1, the coke strength increased when the silane compound was added, and the coke strength was further increased when phenyltrimethoxysilane was added in the range of 3.0 to 50.0 wt%.
페닐트리메톡시실란을 3.0wt% 미만으로 첨가한 경우는 코크스의 열간강도와 냉간강도가 증가되지 않았다. 그리고, 페닐트리메톡시실란을 30.0wt%를 초과하여 첨가하는 경우 그 효과가 포화되었다. 이는 퓸드 실리카 입자간 응집으로 인한 것이다. 또한, 페닐트리메톡시실란을 30.0wt%를 초과하여 첨가한 경우 후공정인 고로 용선 품질에 영향을 미쳤다.
When phenyltrimethoxysilane was added at less than 3.0 wt%, the hot and cold strengths of the coke did not increase. In addition, the effect was saturated when phenyltrimethoxysilane was added in excess of 30.0wt%. This is due to the aggregation between the fumed silica particles. In addition, the addition of more than 30.0 wt% of phenyltrimethoxysilane affected the blast furnace molten iron quality.
<실시예 2><Example 2>
실란화합물의 입자크기가 코크스 강도에 미치는 영향을 측정하였다. The effect of particle size of silane compound on coke strength was measured.
이때, 코크스 제조조건은 아래와 같이 하였다.At this time, the coke production conditions were as follows.
- 장입밀도: 750kg/m3 -Loading Density: 750kg / m 3
- 수분: 8.0±0.3%Moisture: 8.0 ± 0.3%
- 로 온도: 1150℃Furnace temperature: 1150 ℃
- 가열온도(soaking time): 석탄 중심부 온도 900℃ 도달 후 2시간 유지함.Soaking time: Maintained for 2 hours after reaching 900 ℃ of coal core temperature.
여기서, 저휘발분 석탄은 휘발분이 3~7%이고, 고휘발분 석탄은 휘발분 34~36%인 석탄에 해당된다. 저휘발분 석탄의 예로는 무연탄이 있고, 고휘발분 석탄의 예로는 역청탄이 있다. 실란화합물로는 페닐트리메톡시실란을 사용하였다.Here, the low volatile coal is 3 to 7% volatile matter, the high volatile coal corresponds to 34 to 36% volatile coal. An example of low volatile coal is anthracite and an example of high volatile coal is bituminous coal. Phenyltrimethoxysilane was used as the silane compound.
Remarks
(nm)Particle size
(nm)
표 2에 의하면, 실란화합물이 5~30nm 입자크기를 가질때 석탄 품질에 관계없이 코크스 강도가 향상되었다. 하지만 실란화합물의 입자크기가 30nm를 초과하는 범위에서는 코크스 강도가 오히려 낮아졌다.According to Table 2, when the silane compound had a particle size of 5 to 30 nm, coke strength was improved regardless of coal quality. However, the coke strength was lowered in the range where the particle size of the silane compound exceeded 30 nm.
이는 실란화합물의 입자크기가 30nm를 초과하면 실라놀(Si-OR)기가 존재하지 않아 가교 반응이 일어나지 않기 때문이다. This is because when the particle size of the silane compound exceeds 30 nm, no silanol (Si-OR) group is present and thus no crosslinking reaction occurs.
이를 통해, 석탄의 품질에 관계없이 실란화합물 첨가를 통한 가교 반응에 의해 코크스의 강도를 향상시킬 수 있음을 알 수 있다. 이는 코크스 제조를 위한 석탄 선택의 폭을 넓힐 수 있어 제조원가를 절감할 수 있는 유용한 효과가 있다.Through this, it can be seen that the strength of the coke can be improved by the crosslinking reaction through the addition of the silane compound regardless of the quality of the coal. This can widen the choice of coal for coke production and has a useful effect of reducing manufacturing costs.
본 발명은 상기한 실시 예에 한정되는 것이 아니라, 본 발명의 요지에 벗어나지 않는 범위에서 다양하게 변경하여 실시할 수 있으며 이는 본 발명의 구성에 포함됨을 밝혀둔다.The present invention is not limited to the above-described embodiments, and various changes can be made without departing from the gist of the present invention, which is understood to be included in the configuration of the present invention.
Claims (5)
상기 실란화합물을 첨가한 석탄을 코크스 오븐 설비에 장입하여 가열 건류함으로써 코크스를 제조하는 것을 특징으로 하는 코크스의 냉간강도 및 열간강도 향상방법.
<화학식1>
R-Si(OR')n
[R은 페닐기, 멀켑토기, 프로필기, 아미노에칠아미노프로필기로 이루어진 군으로부터 선택되고, R'는 CH3기(알킬기) 그룹으로부터 선택되며, n은 3이다.]As a crosslinking agent causing a crosslinking reaction to coal, a silane compound represented by the following <Formula 1> is added,
The method of improving the cold strength and hot strength of the coke is characterized in that the coke is produced by charging the coal with the silane compound into a coke oven facility and heating and drying the same.
<Formula 1>
R-Si (OR ') n
[R is selected from the group consisting of a phenyl group, a multo earth group, a propyl group, an aminoethylaminopropyl group, R 'is selected from a CH 3 group (alkyl group) group, and n is 3.]
상기 실란화합물은 페닐트리메톡시실란, 멀켑토트리메톡시실란, 프로필트리메톡시실란, 아미노에칠아미노프로필트리메톡시실란 중 선택된 1종인 것을 특징으로 하는 코크스 냉간강도 및 열간강도 향상방법. The method according to claim 1,
The silane compound is phenyltrimethoxysilane, mercetotrimethoxysilane, propyltrimethoxysilane, aminoethylaminopropyltrimethoxysilane, characterized in that the coke cold strength and hot strength improvement method.
상기 실란화합물은 상기 석탄 총중량 대비 3.0wt% 이상 30.0wt% 이하 범위로 첨가되는 것을 특징으로 하는 코크스의 냉간강도 및 열간강도 향상방법. The method according to claim 2,
The silane compound is a method of improving the cold strength and hot strength of the coke, characterized in that added in the range of 3.0wt% or more and 30.0wt% or less relative to the total weight of the coal.
상기 실란화합물은 5~30nm의 입자크기를 갖는 것을 특징으로 하는 코크스의 냉간강도 및 열간강도 향상방법. The method according to any one of claims 1 to 3,
The silane compound has a particle size of 5 ~ 30nm coke's cold strength and hot strength improvement method.
상기 코크스 오븐 설비의 노 온도는 1110~1120℃로 유지하고
상기 노에서 석탄의 가열시간은 석탄의 중심부 온도가 850~950℃에 도달 후 1~3시간 유지하는 것을 특징으로 하는 코크스의 냉간강도 및 열간강도 향상방법.The method according to claim 1,
The furnace temperature of the coke oven equipment is maintained at 1110 ~ 1120 ℃
The heating time of the coal in the furnace is a method of improving the cold strength and hot strength of the coke, characterized in that to maintain for 1 to 3 hours after the central temperature of the coal reaches 850 ~ 950 ℃.
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| KR20110095357A (en) * | 2008-12-10 | 2011-08-24 | 신닛뽄세이테쯔 카부시키카이샤 | Manufacturing method of blast furnace coke |
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| KR20100007808A (en) * | 2008-07-14 | 2010-01-22 | 소니 에릭슨 모빌 커뮤니케이션즈 재팬, 아이엔씨. | Biaxial hinge device and portable terminal device |
| KR20110095357A (en) * | 2008-12-10 | 2011-08-24 | 신닛뽄세이테쯔 카부시키카이샤 | Manufacturing method of blast furnace coke |
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