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WO2010024545A2 - Procédé de production adiabatique de matériau cuit au moyen d'un four vertical - Google Patents

Procédé de production adiabatique de matériau cuit au moyen d'un four vertical Download PDF

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Publication number
WO2010024545A2
WO2010024545A2 PCT/KR2009/004554 KR2009004554W WO2010024545A2 WO 2010024545 A2 WO2010024545 A2 WO 2010024545A2 KR 2009004554 W KR2009004554 W KR 2009004554W WO 2010024545 A2 WO2010024545 A2 WO 2010024545A2
Authority
WO
WIPO (PCT)
Prior art keywords
autothermal
pellets
firing furnace
firing
kiln
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2009/004554
Other languages
English (en)
Korean (ko)
Other versions
WO2010024545A3 (fr
Inventor
남철우
김병규
최영윤
김병곤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Korea Institute of Geoscience and Mineral Resources KIGAM
Original Assignee
Korea Institute of Geoscience and Mineral Resources KIGAM
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Korea Institute of Geoscience and Mineral Resources KIGAM filed Critical Korea Institute of Geoscience and Mineral Resources KIGAM
Priority to CN200980133570.5A priority Critical patent/CN102144039B/zh
Publication of WO2010024545A2 publication Critical patent/WO2010024545A2/fr
Publication of WO2010024545A3 publication Critical patent/WO2010024545A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • C22B1/22—Sintering; Agglomerating in other sintering apparatus
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/2413—Binding; Briquetting ; Granulating enduration of pellets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B17/00—Furnaces of a kind not covered by any of groups F27B1/00 - F27B15/00

Definitions

  • the present invention relates to a vertical autothermal firing furnace wider than the upper portion and a method for manufacturing the autothermal firing body.
  • pellets are calcined at a predetermined temperature by external heating in a stocker or rotary kiln type kiln to obtain a calcined body.
  • the combustion heat is used by containing some carbon component, but the autothermal calcination in the full sense is difficult, and the stalker-type stalker has a problem in that the furnace is driven at a high temperature due to its low durability. Economic operation is difficult due to the increase in operating costs.
  • Rotary kiln type kiln is mainly used for the firing of volcanic ash, and the kiln is configured to charge about 15% of the internal space of the kiln and to be fired by indirect heating by a burner, so that thermal efficiency and work efficiency are low.
  • the plasticity is difficult to maintain because the cohesiveness is lowered at a specific temperature range during firing and the shape of the pellets is difficult to maintain due to wear.
  • the present invention proposes a vertical autothermal firing furnace having a simple structure and no driving part even at high temperatures in order to more economically fire pellets.
  • the present invention provides a method for producing a self-heating calcined body to autothermally fire with heat generated when the pellets are fired without additional heat supply.
  • the present invention proposes a method for preventing fusion due to overfiring by limiting the maximum temperature to a predetermined temperature or less according to the firing temperature of the pellet.
  • the present invention relates to a vertical autothermal firing furnace having a tapered shape and a wider lower portion than the upper portion.
  • the present invention relates to a method for preparing a fired body by autothermal firing after pellets containing carbon and preheated by filling the firing furnace, and continuously adding the pellets.
  • the vertical self-heating kiln is a circular, oval or polygonal cross section of the lower tapered shape than the upper, filled with pellets containing carbon, such as coal, the pre-heated at a constant temperature so that the filled pellets autothermally fired (100 );
  • a pellet input unit configured to supply pellets into the firing furnace 100 in an upper portion of the firing furnace 100
  • the firing furnace 100 characterized in that it comprises an air conditioning unit 310 for controlling the amount of air required for the autothermal firing of the pellets supplied into the firing furnace (100).
  • the autothermal firing furnace refers to a firing furnace configured to sinter pellets with heat generated when firing pellets without additional heat supply.
  • the firing furnace 100 preferably has an inclination angle of 2 to 30 °, and a cross sectional area is widened from the top to the bottom.
  • the shape of the firing furnace 100 is easily discharged by moving the pellets downward in the firing process. There is an advantage to doing this.
  • the air control unit 310 controls the amount of air supplied into the firing furnace 100, and by controlling the firing rate in accordance with the air supply amount to limit the maximum internal temperature to a predetermined temperature or less to prevent underfiring.
  • the air control unit 310 is not limited significantly, but may be a communication type, it may be provided with a manned blower (I.D Fan (Induced Draft Fan)).
  • the air control unit 310 may further include an air volume control device 300 and control the air control unit 310 through the air amount control device 300 to adjust the internal temperature and the firing speed of the kiln. .
  • the vertical self-heating kiln is installed adjacent to the temperature sensor 320 and the air control unit 310 provided to measure the temperature inside the kiln 100, the water level of the pellets filled in the kiln 100 It may further include a water level sensor 230 for measuring.
  • the water level sensor 230 may use an optical sensor.
  • the temperature sensor 320 is provided with at least one, it is possible to measure the temperature inside the kiln according to the height of the kiln. More specifically, the firing furnace 100 may be provided in one or a plurality in a downward direction, and when provided in plural by varying the length of the temperature sensor, effectively measuring the temperature inside the vertical autothermal firing furnace according to the height. can do. In addition, the temperature sensor may be provided over the outside and inside of the kiln through the communication type air control unit 310.
  • the discharge unit 510 may be provided with a screw feeder or pin crusher to discharge a certain amount of the self-fired pellets.
  • the discharge unit, the air amount control device 300 and the temperature sensor is controlled by the controller 520.
  • the firing furnace 100 may be provided with a heater 400 or may be preheated to a predetermined temperature using combustion heat of fossil fuel.
  • the heater 400 may be used to preheat the pellet containing carbon filled in the firing furnace, but is not limited thereto, and any heat source capable of preheating the pellet may be used, and pellets continuously added after preheating may be used. It is autothermally calcined with heat generated during firing of the pellets.
  • the heater 400 may be provided in a band shape in contact with the inner surface of the firing furnace.
  • the pellet input part may include a feeder 210 for temporarily storing the pellet and supplying the hopper 200 to the inside of the firing furnace 100 and a predetermined amount of the pellets provided at the bottom of the hopper to be supplied into the firing furnace.
  • the level of pellets in the kiln can be adjusted through the water level sensor 230 and the feeder 210.
  • a vibrating feeder may be used, and the vibrating feeder is connected to the water level sensor and adjusts the amount of pellets containing carbon supplied from the hopper according to the vibration and tilt of the feeder. can do.
  • the feeder is not particularly limited, but may be connected to the communication air control unit 310 to supply the pellets.
  • the present invention is a step of preheating by filling the pellet containing the carbon into the vertical autothermal kiln, and the pellet containing the carbon continuously into the pellet containing the carbon into the preheated pellet It provides a method for producing a self-heating calcined body comprising the step of discharging the self-heating calcined body generated by the autothermal calcining.
  • any heat source capable of preheating the pellet may be used without limitation, and may be preheated by using a combustion heat of fossil fuel or a heater provided in the kiln.
  • the heat source used in the preheating is necessary only for the first preheating, since the heat generated in the calcining reaction is possible due to the carbon contained in the pellets, so that autothermal calcining is possible.
  • the present invention is characterized in that the pellets introduced into the firing furnace is baked by maintaining 800 ⁇ 1300 °C.
  • Carbon contained in the pellets may be subjected to autothermal firing during firing, and the carbon content is preferably 4.5 to 15% by weight, and when the carbon content is less than 4.5% by weight, autothermal firing does not occur effectively.
  • the pellet may contain 2 to 30% moisture. If the pellet contains less than 2% moisture, the durability of the autothermally calcined body produced after firing may be reduced or may be overfired. If the pellet contains more than 30% of water, the durability of the autothermal calcined body produced after firing may be Can fall.
  • Pellets containing water in the above range may be naturally dried with heat generated during the process of self-firing the pellets that are first introduced, and thus, the drying process is not necessary in the present invention and may have an economic effect.
  • the pellets are carbon-containing materials selected from coal waste-rock, coal and mixtures thereof, and red mud, dolomite, waste foundry sand, illite, pearlite, zeolite, diatomaceous earth, bentonite, vermiculite, manganese slag, clay, coal ash, fly ash, bottom ash and these It may include an inorganic material selected from the group consisting of a mixture of.
  • the autothermal fired body discharged by the autothermal firing is characterized in that the collapse strength is 5 ⁇ 200kgf /, the collapse strength may vary depending on the mixing ratio of the carbon-containing material and the inorganic material of the pellets, carbon content, firing temperature.
  • the collapse strength refers to the maximum pressure at the instant of breakage by applying pressure to the autothermal fired body at a constant speed in one axial direction, and the unit is kgf / piece.
  • the pellets used in the present invention are not particularly limited, but may be manufactured by molding into a spherical or oval shape having a diameter of 5 to 30 mm, and excellent durability when the autothermal fired body is manufactured in the above range.
  • the method of molding the pellets is not particularly limited, and a machine such as a pelletizer may be used.
  • the present invention has the advantage that it is possible to treat the unused mineral resources and waste resources by manufacturing the autothermal calcined body without using additional fuel using coal ash, red mud.
  • the manufactured autothermal fired body can be used as a lightweight aggregate and a porous ceramic fired body, which is expected to use industrially.
  • the kiln according to the present invention has the advantage that the pellets can be easily moved downward and discharged during the firing process because the cross-sectional area increases in the tapered shape toward the bottom of the kiln.
  • the present invention can be autothermally calcined without additional heat supply by using a pellet containing carbon, and the newly added pellets are naturally dried with heat generated during firing, thereby maximizing thermal efficiency by omitting the drying process.
  • Firing furnace 100 is a tapered vertical self-heating kiln, the cross section is circular, the upper diameter of 80mm.
  • Hopper 200 and the vibrating feeder 210 was provided on the top of the kiln.
  • a pin crusher was installed at the lower part of the kiln to discharge the pellets, and an air control unit 310 was provided with an ID fan (Induced Draft Fan). In contact with the air volume control device 300 was installed.
  • Three 50mm, 100mm and 150mm length temperature sensors 320 were provided in the downward direction from the top of the kiln so as to penetrate from the outside to the inside of the kiln, and provided with an optical sensor which is a water level sensor 230 adjacent to the temperature sensor. The level of the pellet was measured to control the feeder speed.
  • the heater 400 was installed in a band shape on the upper inner surface of the kiln, but the heater 400 was installed at a height of 200 mm to 300 mm from the bottom of the kiln.
  • composition ratios of the pellets are shown in Table 1.
  • the fixed carbon content was measured by KS E 3705 (Industrial Analysis Method of Coal).
  • the pellets were filled in a vertical autothermal kiln, preheated the heating wire of the heater so that the internal temperature of the kiln was 750 ° C, and new pellets were continuously added, and the maximum limit temperature of the kiln was limited to 1100 ° C.
  • the autothermal firing was performed while the power supply of the heating coil of the heater was cut off.
  • the autothermal calcined body was continuously discharged through the outlet.
  • the firing furnace maximum limit temperature of the pellets is shown in Table 1.
  • composition ratios of the pellets are shown in Table 1.
  • the fixed carbon content was measured by KS E 3705 (Industrial Analysis Method of Coal).
  • the autothermal fired body was manufactured in the same manner as in Example 1 except that the firing furnace maximum limit temperature was 1050 ° C.
  • the firing furnace maximum limit temperature of the pellets is shown in Table 1.
  • composition ratios of the pellets are shown in Table 1.
  • the fixed carbon content was measured by KS E 3705 (industrial analysis method of coal).
  • the autothermal fired body was manufactured in the same manner as in Example 1 except that the firing furnace maximum limit temperature was 1000 ° C.
  • the firing furnace maximum limit temperature of the pellets is shown in Table 1.
  • composition ratios of the pellets are shown in Table 1.
  • the fixed carbon content was measured by KS E 3705 (Industrial Analysis Method of Coal).
  • the autothermal fired body was manufactured in the same manner as in Example 1.
  • the firing furnace maximum limit temperature of the pellets is shown in Table 1.
  • composition ratios of the pellets are shown in Table 1.
  • the fixed carbon content was measured by KS E 3705 (Industrial Analysis Method of Coal).
  • the autothermal fired body was manufactured by the same method as Example 2 above.
  • the firing furnace maximum limit temperature of the pellets is shown in Table 1.
  • composition ratios of the pellets are shown in Table 1.
  • the fixed carbon content was measured by KS E 3705 (industrial analysis method of coal).
  • the autothermal fired body was manufactured in the same manner as in Example 3.
  • the firing furnace maximum limit temperature of the pellets is shown in Table 1.
  • composition ratios of the pellets are shown in Table 1.
  • the fixed carbon content was measured by KS E 3705 (Industrial Analysis Method of Coal).
  • the autothermal fired body was manufactured in the same manner as in Example 1.
  • the firing furnace maximum limit temperature of the pellets is shown in Table 1.
  • Carbon-containing pellets were prepared in the same manner as in Example 7.
  • composition ratios of the pellets are shown in Table 1.
  • the fixed carbon content was measured by KS E 3705 (Industrial Analysis Method of Coal).
  • the autothermal fired body was manufactured by the same method as Example 2 above.
  • the firing furnace maximum limit temperature of the pellets is shown in Table 1.
  • Carbon-containing pellets were prepared in the same manner as in Example 7.
  • composition ratios of the pellets are shown in Table 1.
  • the fixed carbon content was measured by KS E 3705 (Industrial Analysis Method of Coal).
  • the autothermal fired body was manufactured in the same manner as in Example 3.
  • the firing furnace maximum limit temperature of the pellets is shown in Table 1.
  • composition ratios of the pellets are shown in Table 1.
  • the fixed carbon content was measured by KS E 3705 (Industrial Analysis Method of Coal).
  • the autothermal fired body was manufactured in the same manner as in Example 1.
  • the firing furnace maximum limit temperature of the pellets is shown in Table 1.
  • composition ratios of the pellets are shown in Table 1.
  • the fixed carbon content was measured by KS E 3705 (Industrial Analysis Method of Coal).
  • the autothermal fired body was manufactured in the same manner as in Example 1.
  • the firing furnace maximum limit temperature of the pellets is shown in Table 1.
  • composition ratios of the pellets are shown in Table 1.
  • the fixed carbon content was measured by KS E 3705 (Industrial Analysis Method of Coal).
  • the autothermal fired body was manufactured in the same manner as in Example 1.
  • the firing furnace maximum limit temperature of the pellets is shown in Table 1.
  • composition ratios of the pellets are shown in Table 1.
  • the fixed carbon content was measured by KS E 3705 (Industrial Analysis Method of Coal).
  • the autothermal fired body was manufactured in the same manner as in Example 1.
  • the firing furnace maximum limit temperature of the pellets is shown in Table 1.
  • composition ratios of the pellets are shown in Table 1.
  • the fixed carbon content was measured by KS E 3705 (Industrial Analysis Method of Coal).
  • the autothermal fired body was manufactured in the same manner as in Example 1.
  • the firing furnace maximum limit temperature of the pellets is shown in Table 1.
  • the change in strength suddenly changes, so select a self-heating plastic body with a diameter of 10 to 13 mm and press the pressure at a constant speed of 450 mm / min in one axis direction without any external processing.
  • the maximum pressure at the moment of breaking was applied as the collapse strength.
  • the instrument used for the crush strength was used by installing a load cell AFG2500N (Mecmesin. Ltd.) in a Versa Test.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Processing Of Solid Wastes (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

La présente invention concerne un four vertical adiabatique caractérisé en ce qu'il comprend un four qui est effilé avec une partie inférieure plus large que la partie supérieure et présentant une section sphérique, elliptique ou polygonale, ledit four étant approvisionné en granulés contenant du carbone; une ouverture de remplissage pour les granulés; un système de sortie; et un régulateur d'air. Cette invention porte également sur un procédé adiabatique de production de matériau cuit comprenant les étapes suivantes: le remplissage du four adiabatique vertical avec des granulés contenant du carbone et le préchauffage, suivis par l'introduction en continu de granulés contenant du carbone dans le four préchauffé chargé de granulés, puis la sortie en continu du produit cuit de manière adiabatique produit par le chauffage adiabatique des granulés contenant du carbone depuis la partie inférieure. Le procédé de production de matériau cuit au moyen dudit four présente l'avantage économique d'assurer le chauffage adiabatique des granulés uniquement au moyen de la chaleur générée lors de la chauffe sans aucun chauffage supplémentaire.
PCT/KR2009/004554 2008-08-26 2009-08-14 Procédé de production adiabatique de matériau cuit au moyen d'un four vertical Ceased WO2010024545A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200980133570.5A CN102144039B (zh) 2008-08-26 2009-08-14 利用竖直式烧结炉制造自热烧结体的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2008-0083243 2008-08-26
KR1020080083243A KR101048527B1 (ko) 2008-08-26 2008-08-26 수직형 소성로를 이용한 자열 소성체 제조방법

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WO2010024545A2 true WO2010024545A2 (fr) 2010-03-04
WO2010024545A3 WO2010024545A3 (fr) 2010-07-01

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WO (1) WO2010024545A2 (fr)

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Publication number Priority date Publication date Assignee Title
KR101986846B1 (ko) 2012-11-27 2019-06-07 에스티엑스조선해양 주식회사 컨테이너선의 구조를 고려한 독립형 액화천연가스 연료 탱크
KR102008018B1 (ko) 2017-11-21 2019-08-06 주식회사 나래트랜드 결로 방지 기능을 갖는 제어장치 및 그 제어방법
CN109205638B (zh) * 2018-11-07 2020-02-14 肇庆市珈旺环境技术研究院 一种利用电解锰渣制备方沸石的方法
CN109437964A (zh) * 2018-12-15 2019-03-08 柳州市柳晶科技股份有限公司 一种发泡陶瓷板
KR102796094B1 (ko) * 2021-12-17 2025-04-14 포스코홀딩스 주식회사 흑연화로

Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
JPS55113840A (en) 1979-02-26 1980-09-02 Nippon Kokan Kk <Nkk> Manufacture of hardened pellet of high strength
AT405332B (de) * 1997-07-14 1999-07-26 Voest Alpine Ind Anlagen Schachtofen
CN2344410Y (zh) * 1998-10-30 1999-10-20 王秋森 燃精煤负压烧结炉
JP2000306706A (ja) * 1999-04-22 2000-11-02 Meidensha Corp 非直線抵抗体の製造方法
CN1373340A (zh) * 2001-02-28 2002-10-09 宁志善 一种粉煤灰陶粒的烧结方法及其设备
CN1181013C (zh) * 2001-12-24 2004-12-22 徐利华 利用工业废渣原位合成赛隆复相材料的制备方法
KR200436463Y1 (ko) * 2007-02-23 2007-08-22 (주)오티사이언스 귀금속 도금처리 시설에서의 귀금속 회수 처리 장치

Also Published As

Publication number Publication date
CN102144039B (zh) 2015-03-18
KR101048527B1 (ko) 2011-07-12
KR20100024606A (ko) 2010-03-08
CN102144039A (zh) 2011-08-03
WO2010024545A3 (fr) 2010-07-01

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