US3406955A - Method and apparatus for the production of lightweight aggregates - Google Patents

Method and apparatus for the production of lightweight aggregates Download PDF

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Publication number
US3406955A
US3406955A US500825A US50082565A US3406955A US 3406955 A US3406955 A US 3406955A US 500825 A US500825 A US 500825A US 50082565 A US50082565 A US 50082565A US 3406955 A US3406955 A US 3406955A
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US
United States
Prior art keywords
grate
walls
air
chamber
production
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Expired - Lifetime
Application number
US500825A
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English (en)
Inventor
Kowalenko Witold
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Individual
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Individual
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Filing date
Publication date
Priority claimed from PL106056A external-priority patent/PL53050B1/pl
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3406955A publication Critical patent/US3406955A/en
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Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/16—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/04—Heat treatment
    • C04B20/06—Expanding clay, perlite, vermiculite or like granular materials
    • 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

Definitions

  • ABSTRACT OF THE DISCLOSURE Method and apparatus for the production of lightweight aggregates wherein a solid fuel is ignited on a grate mounted on an air chamber while air is drawn through the fuel and air chamber by a fan whereafter lateral walls are removably placed on the grate and a charge introduced on the fuel and then the fan is reversed and the air directed upwardly through the fuel and charge.
  • the present invention relates to a process for the production of lightweight aggregates and other constructional materials by means of the sintering method, and to a device for carrying this process.
  • a disadvantage of the pan sintering process is the small yield of the product as a consequence of the small capacity of the pan and the difliculties arising in discharging the agglomerate.
  • the above disadvantages are eliminated in the process according to the invention in which an increase of yield of the product in relation to that obtained from the pan is obtained and simultaneously the inconveniences of the shaft furnace are avoided.
  • the process according to the invention consists in igniting the fuel on a grate resting on a container serving as an air chamber, placing lateral walls on the chamber and grate, covering the grate with a layer of the charge and then sintering the raw material while a bottom air blast is commenced. When the sintering process is finished, the lateral Walls are raised and the agglomerate remaining 'on the grate is easily removed in any convenient manner.
  • adherence of the charge to the lateral Walls of the device does not occur nor are the walls excessively heated, because these walls are made of a non-insulated material i.e. heat conductive material which can be rapidly cooled by the surrounding air.
  • a further advantage of the process according to the invention is that the walls are also cooled from the interior by a part of the air stream flowing from below. Due to this fact, in the immediate neighborhood of the lateral walls of the device, a thin layer of the nited States Patent 0 "ice 3,406,955 Patented Oct. 22, 1968 charge is formed which is not subjected to sintering and which protects the lateral walls against heating. After the process is finished the said layer facilitates raising of the walls.
  • a further advantage of the process according to the invention is the possibility of joining several devices into a cyclically operating assembly.
  • a device for carrying out the process according to the invention, a device is shown schematically in the sole figure of the accompanying drawing.
  • the said device consists of a lower part constituting an air chamber 1, and a removable upper part constituted by metal vertical lateral walls 6.
  • At the bottom, of the chamber 1 is connected by means of a pipe 2 with a fan 3 enabling the air to be sucked in while the fuel is being ignited and to be reversed and fed under pressure after the walls 6 are put on the chamber 1 and after the grate 4 is covered with the charge by introduction through the open top of the upper part.
  • the grate 4 On the air chamber 1 the grate 4 is placed and around the grate 4 on a rim of the chamber a bed 5 is placed enabling the lateral walls 6 to be installed on the chamber 1 in sealing contact.
  • Apparatus for the production of lightweight aggregates comprising means defining an air chamber, a grate fixed to said air chamber at the upper end thereof, means coupled to said chamber for drawing air through said grate into the chamber and for blowing air from the chamber through said grate, and a removable assembly of walls on said chamber for surrounding said grate, said walls having lower ends which are at the level of the grate.
  • Apparatus as claimed in claim 1 comprising a bed secured to said grate and mounted on said air chamber, the lower ends of said walls being engageable in said bed.
  • Apparatus as claimed in claim 1 wherein said means for the drawing and blowing of air comprises a fan communicating with said chamber.
  • a process for the production of lightweight aggregates comprising igniting a solid fuel on a grate while drawing air through the fuel and grate to an air chamber beneath the grate, directly and removably placing upstanding walls on said grate, introducing a charge through an open top formed by said walls to cover said fuel with a layer of charge, reversing the direction of air flow through said grate so that the air now passes upwardly through the fuel and layer of charge, whereby the charge is sintered, and raising the lateral walls to remove the sintered product from the grate.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Thermal Sciences (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Structural Engineering (AREA)
  • Processing Of Solid Wastes (AREA)
  • Building Environments (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
US500825A 1964-10-24 1965-10-22 Method and apparatus for the production of lightweight aggregates Expired - Lifetime US3406955A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL106056A PL53050B1 (da) 1964-10-24

Publications (1)

Publication Number Publication Date
US3406955A true US3406955A (en) 1968-10-22

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ID=19943603

Family Applications (1)

Application Number Title Priority Date Filing Date
US500825A Expired - Lifetime US3406955A (en) 1964-10-24 1965-10-22 Method and apparatus for the production of lightweight aggregates

Country Status (5)

Country Link
US (1) US3406955A (da)
BE (1) BE671279A (da)
DK (1) DK108741C (da)
ES (2) ES318843A1 (da)
GB (1) GB1125884A (da)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4538364A (en) * 1981-12-28 1985-09-03 Jensen Anton B Apparatus having bottom air channels for air drying of grain in a drying store and for conveying the grain away from the store
US20130309623A1 (en) * 2012-05-17 2013-11-21 Cheng Uei Precision Industry Co., Ltd. Sintering chamber structure

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US768203A (en) * 1903-12-05 1904-08-23 Maximilian M Suppes Drying-oven.
US1103196A (en) * 1912-10-10 1914-07-14 John E Greenawalt Metallurgical furnace.
US1131691A (en) * 1912-04-25 1915-03-16 Giovanni Fusina Process for desulfurizing ores.
US1531695A (en) * 1920-11-09 1925-03-31 Frederic A Eustis Process of sintering and apparatus therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US768203A (en) * 1903-12-05 1904-08-23 Maximilian M Suppes Drying-oven.
US1131691A (en) * 1912-04-25 1915-03-16 Giovanni Fusina Process for desulfurizing ores.
US1103196A (en) * 1912-10-10 1914-07-14 John E Greenawalt Metallurgical furnace.
US1531695A (en) * 1920-11-09 1925-03-31 Frederic A Eustis Process of sintering and apparatus therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4538364A (en) * 1981-12-28 1985-09-03 Jensen Anton B Apparatus having bottom air channels for air drying of grain in a drying store and for conveying the grain away from the store
US20130309623A1 (en) * 2012-05-17 2013-11-21 Cheng Uei Precision Industry Co., Ltd. Sintering chamber structure

Also Published As

Publication number Publication date
BE671279A (da) 1966-02-14
DK108741C (da) 1968-02-05
ES318843A1 (es) 1966-06-16
GB1125884A (en) 1968-09-05
ES326208A1 (es) 1967-03-01

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