EP0568984B1 - Verfahren zur Herstellung von Produkt-Briketts einer vorgegebenen Brikettzusammensetzung - Google Patents

Verfahren zur Herstellung von Produkt-Briketts einer vorgegebenen Brikettzusammensetzung Download PDF

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Publication number
EP0568984B1
EP0568984B1 EP93107235A EP93107235A EP0568984B1 EP 0568984 B1 EP0568984 B1 EP 0568984B1 EP 93107235 A EP93107235 A EP 93107235A EP 93107235 A EP93107235 A EP 93107235A EP 0568984 B1 EP0568984 B1 EP 0568984B1
Authority
EP
European Patent Office
Prior art keywords
briquettes
granular
green
rotary kiln
zone
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.)
Expired - Lifetime
Application number
EP93107235A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0568984A1 (de
Inventor
Gert-Wilhelm Dr. Lask
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.)
Applied Industrial Materials Corp
Original Assignee
Applied Industrial Materials Corp
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 Applied Industrial Materials Corp filed Critical Applied Industrial Materials Corp
Publication of EP0568984A1 publication Critical patent/EP0568984A1/de
Application granted granted Critical
Publication of EP0568984B1 publication Critical patent/EP0568984B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • 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
    • C10B49/00—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated
    • C10B49/16—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated with moving solid heat-carriers in divided form
    • 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
    • C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
    • C10B53/08—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form in the form of briquettes, lumps and the like
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/26—After-treatment of the shaped fuels, e.g. briquettes
    • C10L5/28—Heating the shaped fuels, e.g. briquettes; Coking the binders
    • 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
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined

Definitions

  • the invention relates to a process for the production of product briquettes of a given briquette composition with a product fraction, a carbon fraction from coke and optionally an additional fraction, which briquettes with the aid of a bituminous binder to form green briquettes and in a rotary kiln with a granular bed filling made of granular heat carriers burn the gas burner and withdraw it from the flue gas, heat treat it.
  • - Product briquettes are briquettes which are intended for a given use, for example as sand briquettes in the production of silicon or ferrosilicon, as ore briquettes in the production of the corresponding metals or as fuel briquettes.
  • the grain bed filling takes up about half the volume of the rotary kiln, for example a length of 50 meters and a diameter of 4 meters.
  • the buoyancy must be prevented so that the green briquettes do not float in the grain bed filling.
  • the weight of the green briquettes or the finished product briquettes that form must be greater than the weight of the displaced grain bed volume.
  • the specific weight of the green briquettes must be greater than the bulk density of the granular heat transfer medium of the grain bed filling.
  • the green briquettes are set up accordingly as part of the known measures. Their specific weight is set by the composition and the compression.
  • the grain bed filling consists of quartz sand or also of fine sand coke, in particular petroleum coke (cf. DE 37 24 541 A1, DE 37 24 464 A1). This has proven itself, but reduces the degree of process engineering freedom of the known measures. Furthermore, abrasion of the green briquettes cannot generally be prevented. This makes it necessary to replace the sand of the grain bed filling or the sand-fine coke of the grain bed filling from time to time.
  • a known method (DE 37 27 464 A1), special measures for setting up or maintaining different treatment zones for the green briquettes are not implemented in the rotary kiln.
  • the known method is characterized in that it works with green briquettes free of molten, baking coal, the specific weight of which is greater than the bulk density of by adjusting the mixing ratio and the compression fine sand coke, if the bottom of the rotary kiln is filled with fine sand coke.
  • the specific weight of the green briquettes is greater than the bulk density of quartz sand by setting the mixing ratio and the compression if the grain bed filling is made up of quartz sand.
  • the invention has for its object to simplify the method described above so that a renewal of the grain bed filling is no longer necessary in the manufacture of certain product briquettes.
  • the method should also be set up so that special operating parameters can be set above the grain bed filling in the rotary kiln.
  • green briquettes are introduced into the rotary kiln, the bituminous binder of which consists of a pitch / coal alloy and which is at a briquetting temperature of 100 ° C. to 200 ° C have been formed, the sand-fine coke grains in the green briquettes being melted into the pitch / coal alloy in the plasticizing zone.
  • the rotary kiln is preferably operated in such a way that the temperature in the grain bed filling rises to 550 ° C.
  • the rotary kiln is further operated in such a way that the temperature in the grain bed filling drops to approximately 450 ° C. in the tempering zone. It is advisable to design and operate the rotary kiln in such a way that the raw briquettes are annealed in the tempering zone for twenty to forty minutes, preferably about thirty minutes. - It goes without saying that the rotary kiln is regularly lined with refractory ceramic.
  • a grain bed filling the coke grains of which are sufficiently free of volatile constituents, can also be produced by the process according to the invention by starting the furnace journey with a sand bed, until the sand bed filling gradually converts the abrasion into a coke bed filling according to the invention. It goes without saying that part of the coke in the grain bed filling also burns. In this respect, refilling may be necessary.
  • the basic structure includes a device for shaping the green briquettes. This facility was not drawn.
  • the device for producing the product briquettes is a rotary kiln 1.
  • a grain bed filling 4 is located in the rotary kiln 1.
  • the granular heat transfer media are guided in a circuit from the feed side 2 through the rotary kiln 1 to the discharge side 3 and back again to the feed side 2.
  • the grain bed filling has the same composition as the green briquettes in terms of the granular product fraction and in relation to the granular carbon fraction.
  • the rotary kiln 1 can be heated from the feed side with at least one gas burner 5.
  • different hatching indicated that a plasticizing zone 6 with an oxidizing atmosphere is maintained in the rotary kiln 1 on the feed side, in which the temperature of the grain bed filling up to increases to over 500 ° C, but in the rest of an annealing zone 7 is realized in which a reducing atmosphere is maintained, in which the temperature of the grain bed filling drops again, to the extent of about 400 ° C.
  • the plasticizing zone 6 merges into the tempering zone 7 in the region of the longitudinal center of the rotary kiln.
  • the bituminous binder is plasticized in the green briquettes, the volatile components are expelled from the green briquettes sufficiently, the volatile components burning in the oxidizing atmosphere.
  • the green briquettes are thereby converted into raw briquettes. These reach tempering zone 7 and are tempered in the tempering zone to produce finished product briquettes.
  • the oxidizing atmosphere in the plasticizing zone 6 of the rotary kiln 1 is set with excess air via the operating parameters of the gas burner 5. As already mentioned, the volatile constituents emerging there from the green briquettes are burned via the grain bed filling 4 in the plasticizing zone 6. This creates the reducing atmosphere for the tempering zone 7.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP93107235A 1992-05-06 1993-05-04 Verfahren zur Herstellung von Produkt-Briketts einer vorgegebenen Brikettzusammensetzung Expired - Lifetime EP0568984B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4214434A DE4214434C1 (nl) 1992-05-06 1992-05-06
DE4214434 1992-05-06

Publications (2)

Publication Number Publication Date
EP0568984A1 EP0568984A1 (de) 1993-11-10
EP0568984B1 true EP0568984B1 (de) 1996-11-06

Family

ID=6457947

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93107235A Expired - Lifetime EP0568984B1 (de) 1992-05-06 1993-05-04 Verfahren zur Herstellung von Produkt-Briketts einer vorgegebenen Brikettzusammensetzung

Country Status (2)

Country Link
EP (1) EP0568984B1 (nl)
DE (2) DE4214434C1 (nl)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3724541A1 (de) * 1987-07-24 1989-02-02 Applied Ind Materials Verfahren und anlage zur herstellung von rohstoff-briketts fuer die erzeugung von silicium oder von siliciumcarbid oder von ferrosilicium
DE3727464A1 (de) * 1987-08-18 1989-03-02 Applied Ind Materials Verfahren und anlage zur herstellung von brennstoff-briketts
DE3843449A1 (de) * 1988-12-23 1990-06-28 Applied Ind Materials Brennstoff-briketts und verfahren zur herstellung
DE3930182A1 (de) * 1989-07-15 1991-01-24 Applied Ind Materials Verfahren fuer die herstellung von brennstoff-briketts

Also Published As

Publication number Publication date
DE59304385D1 (de) 1996-12-12
DE4214434C1 (nl) 1993-07-15
EP0568984A1 (de) 1993-11-10

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