EP1669709A1 - Beams for kilns processing lumpy materials - Google Patents

Beams for kilns processing lumpy materials Download PDF

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Publication number
EP1669709A1
EP1669709A1 EP04425914A EP04425914A EP1669709A1 EP 1669709 A1 EP1669709 A1 EP 1669709A1 EP 04425914 A EP04425914 A EP 04425914A EP 04425914 A EP04425914 A EP 04425914A EP 1669709 A1 EP1669709 A1 EP 1669709A1
Authority
EP
European Patent Office
Prior art keywords
kiln
beams
oil
zone
cooling
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.)
Withdrawn
Application number
EP04425914A
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German (de)
English (en)
French (fr)
Inventor
Daniele Maria Terruzzi
Udo Humfeldt
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.)
Terruzzi Fercalx SpA
Original Assignee
Terruzzi Fercalx SpA
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 Terruzzi Fercalx SpA filed Critical Terruzzi Fercalx SpA
Priority to EP04425914A priority Critical patent/EP1669709A1/en
Priority to CN 200510000197 priority patent/CN1789193B/zh
Priority to EP05425846A priority patent/EP1669708A3/en
Priority to RU2005138721/03A priority patent/RU2403518C2/ru
Publication of EP1669709A1 publication Critical patent/EP1669709A1/en
Withdrawn legal-status Critical Current

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    • 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories or equipment specially adapted for furnaces of these types
    • 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/005—Shaft or like vertical or substantially vertical furnaces wherein no smelting of the charge occurs, e.g. calcining or sintering furnaces

Definitions

  • the present invention is directed to elements to support/protect the bridges of combustion chambers in kilns for the processing of lumpy materials.
  • material in lumps it is intended any coarse material, of different sizes made of stone with high content of calcium carbonate, magnesium calcium carbonate or dolomite.
  • the invention is directed to supporting/protecting devices that can be used in kilns for the calcination (burning) of lumpy materials such as limestone, dolomite or likely.
  • the materials in lumps like limestone, dolomite or likely can be charged from the top of a kiln for example, ring shaft type, which is substantially a vertical axis.
  • the materials are passed in succession from top to bottom, through a pre-heating zone, a calcining zone where two or three combustion chambers, preferably in counter-current, where in its lower part the first level of combustion chambers equipped with burners are foreseen against the circumferential wall of the kiln, a second calcining zone, preferably in counter-current where in its lower part the second level of combustion chambers equipped with burners are foreseen against the circumferential wall of the kiln, an eventual third combustion zone, a homogeneization zone in co-current where the recycling gas moves down, by the effect of the injectors, in the same moving direction of the materials coming down from the calcining zone, a cooling zone in counter-current and a discharging zone for the calcined material.
  • the calcination zone is therefore extended longitudinally on the vertical axis of the kiln and is equipped with several combustion chambers installed radially in series and on more levels.
  • the combustion chambers are made out by a circular part external to the shaft and by a part internal to the shaft having a substantially pyramidal shape with the upper part usually made of refractory bricks, and the supporting part made by a bridge structure, that defines the calcination zone.
  • the bridges are usually made with three overlapped arches of refractory material, of which one is delimits the vault of the combustion chamber and is therefore at direct contact with the hot combustion gases.
  • the technical problem which is the ground for the present invention is exactly the necessity to find a system to avoid the said heavy inconvenient.
  • a first object of the present invention is therefore that to provide a device suitable to support/protect as listed in the attached claims.
  • a second object of the present invention is that to provide a kiln for the treatment of limestone, dolomite and likely having a supporting/protecting device as above described.
  • a kiln for the calcination of lumpy material like limestone or dolomitic is represented as a general example.
  • the kiln is preferably of the annular shaft type, but can be also a shaft kiln with circular, square or rectangular section, or a double shaft kiln or a regenerative kiln.
  • the kiln 1 extends along a vertical axis X-X and comprises, from the top to the bottom, a preheating zone 2 where the material to be calcined is fed to the kiln through conventional devices (not shown), a calcining zone in counter - current, where two levels of, upper 3 and lower 4, combustion chambers with burners are arranged against the circumferential wall of the kiln, a homogenisation zone 5 in co-current where the recycling gas moves down, by the effect of the injectors (not shown), in the same moving direction of the materials coming down from the calcining zone, a cooling zone 6 in counter current and a discharging zone 7 for the calcined materials.
  • a kiln of this type is described for example in the German Patent DE 3140582 here mentioned as reference.
  • a piece of shaft, named 8 is inserted inside the kiln in the way which is known, for example in the German Patent DE 3140582.
  • An annular shaft 12 where the material to be calcined flows through the kiln from top to the bottom is made between the external wall 9 of the piece of the shaft named 8 and the internal surface 10 of the external wall of the kiln 11.
  • the piece of shaft named 8 is then closet to its bottom end by a wall 13 and to its upper end by a cover 14, having for example a conical shape.
  • the piece of shaft named 8 is divided through a transversal wall 15, in un upper inner cylinder 16 and in a lower cylinder 17.
  • the upper section 16 separates the above mentioned burning zones
  • the lower section 17 is connected to the annular shaft 12 through the openings 18 for the cooling air (in the figure 1 only one is represented).
  • first 3 and second 4 a corresponding first 19 and second 20 combustion chamber is associated.
  • These combustion chambers are positioned at the bottom of each of the burning zone and in a manner that the combustion gases that are produced in the chamber flows at the side and upstream in the burning zones, in a conventional way.
  • combustion chambers first 19 and second 20 are delimited and separated by the corresponding burning zones through a pyramidal structure 22.
  • the pyramidal structural 22 includes an upper part 23 and a vault part 24 (figure 5).
  • the vault part 24 has a series of arches 25 that, instead to be beard on the side on supports of the internal wall of the kiln according to the well-known method, are bearing on supporting/protection devices 26.
  • Each of the combustion chambers first 19 and a second 20 is normally equipped with burners (not shown in the Figure 1-5) of conventional type, preferably fed with gaseous fuels, liquid fuels and/or pulverized solid fuels, installed on the external surface of the kiln 1 at the inlet 27 of the combustion chambers or on their sides.
  • the supporting/protection devices 26 are preferably beams that are extended lengthwise along one axis Y-Y, as better represented in the figure 5B.
  • the beams 26 are installed radially, two for each bridge, with their axis Y-Y substantially perpendicular to the axis X-X of the kiln itself, as represented in the figure 2.
  • the beams are inserted in the combustion chambers in a way to bear with the distal end 28 on a housing 29 made in the internal refractory wall of the kiln 1, and with the proximal end 30 on a floor 31, horizontal to the external wall of the kiln, made nearby the inlet 27 of the combustion chambers (figure 3).
  • the beams 26 have a transversal T section with a head 32 and a body 33. Both the head and the body are equipped with jackets 34 to allow the flowing of a cooling fluid.
  • the cooling fluid could flow in the jacket following any type of path, preferred or chosen according to the particular necessities, such as, for example that one represented by the arrows in the figures 5C and 5D.
  • the central part of the body 33 of the beams 26 can advantageously house burners, preferably burner lances 35 as better shown in the figure 5B, in tailored hollows 36 having the function to house a variable quantity of burners.
  • the hollows 36 can be more than one and, as better represented in the figure 5A, each one is separated by a longitudinal vertical baffle 37.
  • the burner lances 35 include burner pipes 38 that are extending inside the beams 26 parallely, preferably one over the other one.
  • the pipes 38 can be preferably embodied by hollows 39 having the function to allow the flow of the combustion air for each individual burner lance or set of burner lances in order to obtain a better control of the air distribution in addition to the possibility to measure constantly and regulate the flow.
  • the combustion air is forced inside the beams through openings (not shown) positioned preferably on the bottom side towards the kiln 1 and follow a path similar to that one that is described after with reference to the figures 7A and 7B.
  • the openings can be used for the recycling of combustion gases.
  • the burner lances 35 or the hollows 39 are bearing both to the baffle 37 through spacers and to the bottom part of the same hollow 39 through a set of wheels 60 (represented in the figure 5B) that allow the advantage to insert and extract the set of lances 35 and hollows 39.
  • the pipes can be equipped in side the hollows with spacers 41 in order to avoid the contact between the pipes and walls of the hollows.
  • the burner lances 35 have one end 42 opened that are positioned where there are corresponding openings 43 to the external wall of the beams 26; these openings 43 are located in different positions along the beams in order to allow the fuel to exit from the beam itself in several points and penetrate inside the kiln in prefixed points. In this way, the mixing air/fuel can be uniformly distributed along the beam.
  • the beams 26 are successfully realized with high temperature resistant steel, or steel that can resist to the operating temperature of the kiln 1.
  • high temperature resistant steel or steel that can resist to temperatures between 200°C and 300°C because the cooling system, hereafter described, permits to keep constant this temperature of the beams.
  • steel are well-known in the field as quality unalloyed steel, special unalloyed steel and special alloyed steel. All these types of steel are suitable to resist to the above temperatures and to bear remarkable loads so that show a mechanical strength suitable to the use such as beams in a kiln as that one above described.
  • steel that can satisfy the above necessities are for example that one identified with the code P275N (No. 1.0486), P275NH (No. 1.0487), P275NL1 (No. 1.0488) o P275NL2 (No. 1.1104).
  • the beams 26 are advantageously cooled with a cooling fluid through a circulation system.
  • the fluid is a diathermic one such as water, mineral, vegetal or synthetic (MONSANTO) oils, biphenyl and derivate, tetra-aril silicate, mixing of melted salts, liquid products such as glycerin, silicone, derivate from the naphthalene, more preferably diathermic mineral oil.
  • MONSANTO MONSANTO
  • oils those that are particularly preferred are the mineral diathermic oils used for the cooling of boilers, heat exchangers or similar. Examples of these oils are that one available on the market with the commercial brands ESSOTHERM 300 (ESSO), TEXATHER 46 (TEXACO) e SHELL THERMIA OIL B.
  • the cooling fluid circulates under pressure in the above mentioned jackets 34 of the beams 26 in order to keep a beam temperature not above 300°C.
  • the fluid has therefore the function to remove the heat produced by the combustion and consequently keep the beams under the best preservation and operating conditions.
  • An example of circulation of the fluid in the jackets 34 of the beams 26 is represented by the arrows in the figure 5C and 5D.
  • FIG. 8 an example of the circuit to feed the oil to the beams and its recycling is represented in the figure 8.
  • the circuit is made with a first heat exchanger 44' for example a tube type, finned or not equipped with a fan 45', with heat recovery (as shown by the inlet/outlet arrows to the heat exchanger 44') and of a second heat exchanger 44, for example finned type heat exchanger with fans 45 for waste air (or recovering). Both the heat exchangers allow to drawn the heat removed from the above mentioned beam in a conventional way.
  • the oil passes through a filter, which is not shown but it is a conventional type, that keep the oil free from impurities.
  • a small decanter Downstream the filter a small decanter, not shown, can be foreseen in order to eliminate the possible last residual present in the oil, and create a turbulence free zone to facilitate the operation of the oil circulation pumps.
  • the pumping group 46 Downstream the decanter the pumping group 46 is foreseen made with two centrifugal pumps, each one equipped with electric motor and an additional pump with diesel motor (all the three pumps are installed in parallel with respect to the inlet, in order to assure the same pressure and flow to the outlet collector).
  • the system is normally into operation with only one of the two electric pumps working (the other one is in stand-by and is switched on in case the pressure or flow of the oil is reduced).
  • the diesel pump is switched on in case of electric black-out with consequent stop of the electric pumps: in this way the life of the beams is preserved, keeping the oil circulation to the beams, supporting their cooling and therefore assuring the integrity.
  • a pipe 48 feeds the inlet collector 49 from where the primary piping 50 starts to reach one of the beams 26 for each couple.
  • the fluid is circulated through secondary piping 51 to a beam positioned on a different level.
  • a third piping 52 takes back the fluid to the second pump of the first couple at the outlet of this second beam, the fluid is taken with fourth piping 53 to the second beam of the different level.
  • a fifth piping 54 brings the fluid into a outlet collector 55 and through a return piping 56 to an heat exchanger 44'.
  • this particular circuit allows to keep advantageously a reduced flow of the cooling fluid, and in particular the diathermic oil, with the consequent saving in the total amount of fluid circulating and efficiency of the complete system.
  • An expansion tank 47 of the oil is installed at the top of the kiln in order to keep a constant head on the pumping group and furthermore allows to compensate the slight volumetric expansions of the oil that are due to the temperature difference from the ambient one, to the operating temperature of about 200°C.
  • a storage tank 48' installed at the ground level assures a continuous oil reserve for the circuit and furthermore allows, in case of stop of the kiln for maintenance (for example replacement of the beams, etc.), to have a collecting tank for the oil contained in the circuit.
  • the piping branches can foresee first piping that reach one beam of a couple of the same level, second piping that bring the fluid to the other beam of the same couple of the same level, third piping that brings the fluid to a first beam of a couple of different level and fifth piping that bring the fluid to the outlet collector.
  • the above first heat exchanger 44' can also be eliminated in case that it is not intended or it is not necessary to recover the heat that could be recycled into the kiln in accordance with conventional systems.
  • the complete system is normally operating in automatic mode with conventional PLC.
  • the beams 126 correspond, from the construction point of view, substantially to half of to the beams 26, or to one of the two sections separated by the longitudinal vertical baffle 37; for this reason these beams are not described hereafter into details, and the identical reference numbers to that one indicated in the figure 5A-5D represents identical pieces or portions.
  • the advantage deriving from the use of the beams 126 consists in the fact that with this particular structure the combustion gases can be produced from one side of the beam only, and in particular from the side towards the external of the combustion chamber. Consequently, for particular applications where it is sufficient to have burner lances on one side of the beam only, this allows to simplify advantageously the realization of the complete plant and to reduce the size of the beams, increasing the surface treatment and reduction of the consumptions.
  • a type of beam similar to that one above described can be also used in kiln having circular, square or rectangular section, and not annular, where the immersed beams that across the kiln section and that are near to the walls of the kiln, can avoid the installation of useless burner lances against the wall and foresee only those towards the center of the kiln.
  • the necessity to have external and/or peripheral burners than penetrate inside the limestone bed is also eliminated.
  • a beam 226 similar to the beam 26 of the figure 5C, but without the head 32, the baffle 37 and the burners 3, is represented in the figure 7A and 7B.
  • the beam 226 has a section which is almost rectangular, with a jacket system 234 substantially identical to that one described before. Furthermore, the central part has an hollow 261 suitable to allow the circulation of hot air and/or exhaust gases in order to create a suitable recycling system.
  • the beam 226 can be equipped with openings 262 put on the side towards the bottom of the kiln, through whom hot air is forced with conventional method (suitable fans) that flows through the hollow 261 up to the two ends of the beam to reach the burners and obtain the best combustion.
  • the combustion gases can be alternatively sucked also internally to the beam and follow the same circuit route just mentioned before, but being fed to a conventional recovery system.
  • the beam 226 can be realized without the openings 262 and simply operating as supporting/protection device to the vault of the combustion chambers, cooled with the above mentioned cooling system.
  • a further function of the beam 226 can be that one to be suction beam, also cooled as previously described, and that can be installed at the limit of the post-combustion zone also in the type of shaft kilns where the beams are extended across their full cross section and are immersed in the material to be treated.
  • the beams object of this invention can be preferably lined with insulating and refractory materials, for example bricks and/or castable materials, in order to eliminate the contact between the limestone, in the calcination zone, and the beam surface which is relatively cold.
  • insulating and refractory materials for example bricks and/or castable materials
  • the beams can be installed in different quantities and with two ways of distribution: on the same vertical axis for each level of the combustion chamber, or staggered with respect to the vertical axis for each of the two levels.
  • the solution with the beams installed on the same vertical axis allows that the very hot combustion gases produced by the combustion of the lower level of calcination come into contact, in counter-current, with the quicklime already completely calcined in the upper calcination level, allowing in this way a thickening of the crystal structure, that is linked to the reduction of the specific surface, obtaining in this way a reduced reactivity of the lime.
  • the flow rate of the fuel whichever is the type - gaseous, liquid and pulverized solid - is advantageously controlled and measured in automatic mode for each set of burner lances, and automatic or manually for each individual burner lance.
  • gaseous fuel it is a system with regulating valves that are controlled by a PLC, as previously indicated.
  • the PLC system regulates the fuel gas flow rate opening and closing the valves according to the set points.
  • This system operates by means of sensors that transmit a signal to the control system that will constantly compare the signal received with the set points and will operate with the emission of a regulating signal that will drive a suitable device for the opening or closing of the valves.
  • the beams in accordance with the present invention can be advantageously cooled with different types of fluids, according to the preference and particular necessities.
  • water cooling system implies the use of pipes and valves having a much bigger size compared to that one used in a oil system, and the necessity to use demineralized water to avoid inconvenient and calcium carbonate deposits. This implies that the equipment require larger sizes and higher operating costs.
  • the smaller dimensions of the diathermic oil allows to simplify the plant with piping and valves of smaller sizes because of compacts components and equipment. Furthermore, the operating costs of the complete plant are dramatically reduced because the diathermic oil is replaced after years of operation.
  • diathermic oil allows the heat recovery through heat exchangers to preheat the combustion air, increasing consequently the kiln efficiency.
  • the surprising advantage that is obtained having selected beams with diathermic oil is that is possible to obtain important reduction in the oil jacket of the beams. Consequently, the treatment of the lumpy material is, from the point of view of the process, much more efficient since the reduced size of the beam inside any type of kiln for the burning of lumpy materials increases the working surface and the kiln capacity or, in any case, implies a benefit the descending of the material inside the kiln. In particular, it has been detected that the flow rate of the cooling fluid and the section of the jackets for the cooling fluid can be reduced by 30% compared to conventional fluids.
  • the shape, dimensions and thickness of the beams could be subject to modifications according to specific structural conditions, but in any case able to operate according to what above described.
  • the dimensions and the thickness could be increased in case that the arches of the bridges that support the upper part of the combustion chambers will be completely eliminated or be present in a variable quantity according to the particular necessities and /or conditions.
  • the number, the position and the type of the burners inside the beams, in particular the burner lances, could be subjected to modifications according to some special exigencies.
  • it can be foreseen burner lances whose outlet hole of the fired fuel is positioned on the beams body at level of the parallel side respect to the beams head.
  • a pulverized fuel according to conventional methods.
  • the beams in subject can be adapted by the technician to kilns of different type such as for example the shaft kilns annular, circular, square or rectangular type and the type in which the beams are immersed in the bed of material to be treated, without the support function above described.
  • the beams can be positioned inside the kiln according to the schemes above specified or in a different way.
  • the beams can be positioned radially on one or two levels corresponding to one or two combustion chambers according to the type of kiln and/or to the kind of treatment to be carried out.
  • the beams can be modified dimension wise and shape wise as above indicated.
  • a beam 326 in Figure 9 , comprises a cavity 361 in which a series of burner lances 335 are housed.
  • the burner lances 335 are surrounded by chambers 339 identical to the ones described in Figure 5A.
  • the burner lances 335 show their open end 342 positioned in correspondence to the holes 343 obtained in the external wall of the beams in correspondence to the side towards the kiln bottom. This particular position is used in case pulverised fuel is utilized.
  • the series of burner lances 335 lay and slide inside the cavity 361 thanks to wheels 360 identical to one described in Figure 5B.
  • the beam 326 can be double, which means it can house 2 series of burner lances 335 in the cavity 361 separated by a baffle identical to the one described in Figure 5A.
  • the advantage of this further variant is that the combustion capacity can be doubled especially when pulverised fuel is used.
  • the wheels 60, 360 can slide on a insertion plan inside the cavity 39,339 of the beams 26, 326 which ends with a descending ramp to indicate the reaching of the correct working position of the burner lances as well as to avoid their accidental outlet from this correct position.
  • the wheels can slide on a proper rail lifted above the bottom of the cavity where the burner lances are housed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Tunnel Furnaces (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
EP04425914A 2004-12-13 2004-12-13 Beams for kilns processing lumpy materials Withdrawn EP1669709A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP04425914A EP1669709A1 (en) 2004-12-13 2004-12-13 Beams for kilns processing lumpy materials
CN 200510000197 CN1789193B (zh) 2004-12-13 2005-01-06 加工块状材料窑炉用梁
EP05425846A EP1669708A3 (en) 2004-12-13 2005-11-29 Kiln for burning lump materials
RU2005138721/03A RU2403518C2 (ru) 2004-12-13 2005-12-12 Балки для печей, обрабатывающих крупнокусковые материалы, (варианты) и печи (варианты)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04425914A EP1669709A1 (en) 2004-12-13 2004-12-13 Beams for kilns processing lumpy materials

Publications (1)

Publication Number Publication Date
EP1669709A1 true EP1669709A1 (en) 2006-06-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04425914A Withdrawn EP1669709A1 (en) 2004-12-13 2004-12-13 Beams for kilns processing lumpy materials

Country Status (3)

Country Link
EP (1) EP1669709A1 (it)
CN (1) CN1789193B (it)
RU (1) RU2403518C2 (it)

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EP2180280A1 (de) 2008-10-24 2010-04-28 Maerz Ofenbau AG Ringschachtofen
CN101738082B (zh) * 2010-01-19 2011-05-11 唐山市盈心耐火材料有限公司 冶炼球团竖炉导风墙及其砌筑方法
CN102589301A (zh) * 2012-03-01 2012-07-18 石家庄博广热能科技有限公司 石灰窑用冷却式吸气梁
CN103922616A (zh) * 2014-03-14 2014-07-16 石家庄奋进科技有限公司 一种钢材与耐火材料复合绝热式燃烧梁
CN105330179A (zh) * 2015-12-02 2016-02-17 中冶焦耐工程技术有限公司 箱式烧嘴竖窑
CN105837063A (zh) * 2016-04-05 2016-08-10 石家庄奋进科技有限公司 一种石灰窑用风冷式燃烧梁

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JP5636881B2 (ja) * 2010-11-01 2014-12-10 宇部興産機械株式会社 竪型焼成炉
CN103058535B (zh) * 2012-08-08 2014-07-30 南京梅山冶金发展有限公司 一种环形套筒窑低产控制工艺
CN104230187B (zh) * 2014-08-20 2016-09-07 石家庄新华能源环保科技股份有限公司 一种使用预热助燃风的燃烧梁
CN106986561B (zh) * 2017-05-17 2023-05-02 江苏中圣园科技股份有限公司 环形石灰竖窑
EP3868901B1 (en) * 2020-02-21 2022-09-21 C.R.F. Società Consortile per Azioni Method for moulding a sheet into a component of complex shape having areas with different mechanical properties, particularly a motor-vehicle component, and kiln for heating a sheet prior to a forming step.
EP3868902B1 (en) * 2020-02-21 2022-09-21 C.R.F. Società Consortile per Azioni Method for moulding a sheet into a component of complex shape having areas with different mechanical properties, particularly a motor-vehicle component, and kiln for heating a sheet prior to a forming step.

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GB236776A (en) * 1924-10-08 1925-07-16 Remo De Bartolomeis Improvements in and relating to gas-fired shaft furnaces
US3356351A (en) * 1965-09-10 1967-12-05 Union Carbide Corp Vertical lime kiln
US4141154A (en) * 1976-12-17 1979-02-27 Klockner-Humboldt-Deutz Method for the cooling of a shaft furnace for the calcining of lime, dolomite or magnesite
FR2450241A1 (fr) * 1979-02-28 1980-09-26 Maerz Ofenbau Procede et installation pour la cuisson de pierre a chaux au moyen de combustibles solides pulverulents et/ou en fin granules dans un four a chambres verticales a regeneration a courant continu
DE3140582A1 (de) * 1981-10-13 1983-04-28 Beckenbach, Ulrich, Dipl.-Ing., 4005 Meerbusch Verfahren zum brennen von kalkstein, dolomit oder dergleichen sowie ringschachtofen zu seiner durchfuehrung
US4414186A (en) * 1981-04-29 1983-11-08 Klockner-Humboldt-Deutz Ag Method and apparatus for calcining limestone in a shaft kiln

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Publication number Priority date Publication date Assignee Title
RU2213918C1 (ru) * 2002-03-18 2003-10-10 Федеральное государственное унитарное предприятие "Проектно-конструкторское бюро металлургической теплотехники и энерготехнологии цветной металлургии" Способ обжига кускового известняка в шахтной печи

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB236776A (en) * 1924-10-08 1925-07-16 Remo De Bartolomeis Improvements in and relating to gas-fired shaft furnaces
US3356351A (en) * 1965-09-10 1967-12-05 Union Carbide Corp Vertical lime kiln
US4141154A (en) * 1976-12-17 1979-02-27 Klockner-Humboldt-Deutz Method for the cooling of a shaft furnace for the calcining of lime, dolomite or magnesite
FR2450241A1 (fr) * 1979-02-28 1980-09-26 Maerz Ofenbau Procede et installation pour la cuisson de pierre a chaux au moyen de combustibles solides pulverulents et/ou en fin granules dans un four a chambres verticales a regeneration a courant continu
US4414186A (en) * 1981-04-29 1983-11-08 Klockner-Humboldt-Deutz Ag Method and apparatus for calcining limestone in a shaft kiln
DE3140582A1 (de) * 1981-10-13 1983-04-28 Beckenbach, Ulrich, Dipl.-Ing., 4005 Meerbusch Verfahren zum brennen von kalkstein, dolomit oder dergleichen sowie ringschachtofen zu seiner durchfuehrung

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2180280A1 (de) 2008-10-24 2010-04-28 Maerz Ofenbau AG Ringschachtofen
DE102008053136A1 (de) * 2008-10-24 2010-05-20 Maerz Ofenbau Ag Ringschachtofen
DE102008053136B4 (de) * 2008-10-24 2013-04-11 Maerz Ofenbau Ag Ringschachtofen
CN101738082B (zh) * 2010-01-19 2011-05-11 唐山市盈心耐火材料有限公司 冶炼球团竖炉导风墙及其砌筑方法
CN102589301A (zh) * 2012-03-01 2012-07-18 石家庄博广热能科技有限公司 石灰窑用冷却式吸气梁
CN103922616A (zh) * 2014-03-14 2014-07-16 石家庄奋进科技有限公司 一种钢材与耐火材料复合绝热式燃烧梁
CN103922616B (zh) * 2014-03-14 2015-09-09 石家庄奋进科技有限公司 一种钢材与耐火材料复合绝热式燃烧梁
CN105330179A (zh) * 2015-12-02 2016-02-17 中冶焦耐工程技术有限公司 箱式烧嘴竖窑
CN105330179B (zh) * 2015-12-02 2017-09-19 中冶焦耐工程技术有限公司 箱式烧嘴竖窑
CN105837063A (zh) * 2016-04-05 2016-08-10 石家庄奋进科技有限公司 一种石灰窑用风冷式燃烧梁

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CN1789193A (zh) 2006-06-21

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