US3479251A - Process for the production of molded objects - Google Patents

Process for the production of molded objects Download PDF

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Publication number
US3479251A
US3479251A US479588A US3479251DA US3479251A US 3479251 A US3479251 A US 3479251A US 479588 A US479588 A US 479588A US 3479251D A US3479251D A US 3479251DA US 3479251 A US3479251 A US 3479251A
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United States
Prior art keywords
particles
gases
nonsoftening
heated
mixing
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Expired - Lifetime
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US479588A
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English (en)
Inventor
Georg Kardaun
Hubertus H Smeets
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Stamicarbon BV
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Stamicarbon BV
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Publication date
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    • 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 OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
    • 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 OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • 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 OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
    • C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
    • C10L5/22—Methods of applying the binder to the other compounding ingredients; Apparatus therefor

Definitions

  • PROCESS FOR THE PRODUCTION OF MOLDED OBJECTS Filed Aug. 13, 1965 United States Patent 3,479,251 PROCESS FOR THE PRODUCTION OF MOLDED OBJECTS Georg Kardaun, Stein, and Hubertus H. Smeets, Spaubeek, Netherlands, assignors to Stamicarbon N.V., Heerlen, Netherlands Filed Aug. 13, 1965, Set. N0. 479,588 Claims priority, application Netherlands, Aug. 18, 1964,
  • This invention relates to improvements in a process for the production of molded objects, such as fuel briquettes and the like. More particularly, the invention relates to an improved apparatus and process for substantially eliminating entrainment of objectionable tar residues in gases evolved during hot mixing of materials to be molded.
  • the invention has for an object, the more efficient use of gases evolved from the elevated temperature treatment of solids containing volatile matter.
  • the invention has for another object the elimination of entrained tar residues from such evolved gases so as to greatly reduce or substantially eliminate the formation of troublesome d eposits and encrustation that now lead to line clogging in such systems.
  • Other objects will become apparent as this description proceeds.
  • the invention is particularly concerned with processes and apparatus for the production of molded objects by mixing plasticizable materials such as coal particles that soften at an elevated temperature, e.g., semibituminous or bituminous coal, with particles of substantially nonplasticizable or nonsoftening materials, to provide a moldable mixture capable of being formed into fuel briquettes or the like molded objects.
  • the substantially nonsoftening particles include particles that do not soften, and particles that hardly soften at the elevated softening temperature of the coal particles. Typical of these nonsoftening particles are low volatile fines, coke breeze or ore, which particles are in the heated state during the process of the invention.
  • the invention also has application to mixing of other materials that can be molded or briquetted, and that evolve gases during heating and mixing.
  • This copending application describes and claims a process for the manufacture of molded products comprising the steps of: heating a first substance including a desired inert by direct contact with a hot gas flow to a temperature substantially above a predetermined temperature;
  • the heated first substance is separating the heated first substance from said gas flow; heating a second substance including a plasticizable material by direct contact with the gas flow from which said first substance was separated to a temperature which is below said predetermined temperature and which is insufficient to soften said second material to a significantly tacky condition; separating the heated second substance from the gas flow; mixing the heated first substance which is above said predetermined temperature with the heated second substance which is' below said predetermined temperature; effecting a heat exchange between said heated first and second substances to bring the mixture to said predetermined temperature at which temperature said second substance is sufficiently softened as to constitute a binder for said first substance; and molding said mixture.
  • the mixture is molded into fuel briquettes.
  • This installation is provided with supply cyclones or reservoirs 1 and 2 for feeding heated materials which are to be molded, as disclosed in U.S. Patent Number 3,213,169 mentioned above.
  • Feed screws 3 and 4 and feed ducts 5 and 6 may be employed to conduct or supply separate streams of the heated materials from the respective reservoirs 1 and 2 to the mixing bunker or mixing chamber 8, which is preferably shaped to be free of dead corners.
  • Mixing may be accomplished as in U.S. Patent Number 3,213,169, or simply with the horizontal stirrer shown.
  • the mixing vessel terminates at an ordinary feeding or metering device 9 which in turn leads to the roll press 10.
  • the latter may be of the known briquetting type.
  • Feed duct 5 is open at the upper end so that gases evolved in the mixing chamber may be exhausted through the riser 11, scrubber system and feed line 12, and into the wash trough 13, for final cleaning before being exhausted up through the line 14.
  • reservoir 1 contains the heated nons-oftening material and reservoir 2 contains the coal to be softened, respectively.
  • the feed screws 3 and 4 continuously supply material from the reservoirs 1 and 2, via the lines 5 and 6, to the top of mixing vessel 8, which is provided with a shaft 7 carrying stirrer arms. From the mixing vessel, the mixture gravitates into a feeding device 9, which supplies it to the roll press 10.
  • the gases released in the mixing vessel escape through pipe 5, where they come into contact with the hot nonsoftening material supplied from reservoir 1. Thereafter, the gases flow on to riser 11 connecting to the scrubbing system, which comprises a line 12 and a wash trough 13.
  • the invention provides a substantial improvement in preventing deposit formation and line clogging in the riser and scrubber.
  • clogging becomes severe enough in 1-2 days to require a shutdown for cleaning.
  • the present invention reduces the tar deposit to such a low level that it almost completely eliminates the need for shutdown between ordinary repair periods which ocour every 6 weeks.
  • a process for the production of molded fuel briquettes and the like comprising the steps of hot-mixing coal particles softening at elevated temperature with heated particles that are substantially nonsoftening at said elevated temperature, wherein the heated particles that are nonsoftening are heated to a temperature which is above the temperature wherein the mixed coal particles that are capable of softening becomes soft, and tar containing gases are evolved, whereafter the hot mixture is molded into fuel briquettes and the like, the improvement comprising bringing the released gases into contact with the hot nonsoftening particles prior to the hot mixing step, so that entrained tar is substantially converted into products that do not clog the lines through which said gases are removed.
  • a process for the production of molded fuel briquettes and the like comprising: supplying a stream of coal particles that will soften at an elevated temperature, supplying a stream of particles that are substantially nonsoftening at said elevated temperature, heating said substantially nonsoftening particles to at least said elevated temperature, and then mixing said coal particles with said substantially nonsoftening particles so that a transfer of heat is effected to heat the coal particles enough that coal particles capable of softening become soft, and tar containing gases are evolved from the heated coal particles, followed by molding the mixed particles into fuel briquettes and the like, the improvement comprising bringing the evolved tar-containing gases into contact with the heated and substantially nonsoftening particles prior to the mixing step so that the properties of the entrained tar are changed by said contact with the heated nonsoftening particles so that the evolved gases, will be substantially free of deposit forming products that clog surfaces with which said evolved gases come into contact.
  • coal particles are selected from the group consisting of particles of bituminous coal and semibituminous coal.
  • substantially nonsoftening particles are selected from the group consisting of low-volatile fines, coke breeze and ore.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Coke Industry (AREA)
US479588A 1964-08-18 1965-08-13 Process for the production of molded objects Expired - Lifetime US3479251A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6409480A NL6409480A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1964-08-18 1964-08-18

Publications (1)

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US3479251A true US3479251A (en) 1969-11-18

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US479588A Expired - Lifetime US3479251A (en) 1964-08-18 1965-08-13 Process for the production of molded objects

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US (1) US3479251A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE668414A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1243141B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1094548A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
LU (1) LU49351A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL6409480A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11811850B2 (en) 2009-10-08 2023-11-07 Bright Data Ltd. System providing faster and more efficient data communication
US12260364B2 (en) 2015-04-24 2025-03-25 United Parcel Service Of America, Inc. Location-based pick up and delivery services

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2582712A (en) * 1947-05-17 1952-01-15 Standard Oil Dev Co Fluidized carbonization of solids
US2922752A (en) * 1957-03-07 1960-01-26 Cabot Godfrey L Inc Continuous carbonization process and apparatus
US3085947A (en) * 1955-02-24 1963-04-16 Harold G Tufty Method and apparatus for producing furnace charging mixtures including carbonaceous fuel
US3167427A (en) * 1955-12-27 1965-01-26 Owens Corning Fiberglass Corp Polyphase materials
US3174846A (en) * 1963-04-10 1965-03-23 United States Steel Corp Method of briquetting iron oxide fines

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1189162A (fr) * 1956-09-10 1959-09-30 Allied Chem Séchage, préchauffage, transfert et carbonisation du charbon

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2582712A (en) * 1947-05-17 1952-01-15 Standard Oil Dev Co Fluidized carbonization of solids
US3085947A (en) * 1955-02-24 1963-04-16 Harold G Tufty Method and apparatus for producing furnace charging mixtures including carbonaceous fuel
US3167427A (en) * 1955-12-27 1965-01-26 Owens Corning Fiberglass Corp Polyphase materials
US2922752A (en) * 1957-03-07 1960-01-26 Cabot Godfrey L Inc Continuous carbonization process and apparatus
US3174846A (en) * 1963-04-10 1965-03-23 United States Steel Corp Method of briquetting iron oxide fines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11811850B2 (en) 2009-10-08 2023-11-07 Bright Data Ltd. System providing faster and more efficient data communication
US12260364B2 (en) 2015-04-24 2025-03-25 United Parcel Service Of America, Inc. Location-based pick up and delivery services

Also Published As

Publication number Publication date
LU49351A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1965-10-18
NL6409480A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1966-02-21
DE1243141B (de) 1967-06-29
BE668414A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1966-02-17
GB1094548A (en) 1967-12-13

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