EP0019953B1 - Rollenrost zum Transport von Grünpellets - Google Patents

Rollenrost zum Transport von Grünpellets Download PDF

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Publication number
EP0019953B1
EP0019953B1 EP80200401A EP80200401A EP0019953B1 EP 0019953 B1 EP0019953 B1 EP 0019953B1 EP 80200401 A EP80200401 A EP 80200401A EP 80200401 A EP80200401 A EP 80200401A EP 0019953 B1 EP0019953 B1 EP 0019953B1
Authority
EP
European Patent Office
Prior art keywords
rollers
pellets
sieving
roller
clearance
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
Application number
EP80200401A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0019953A1 (de
Inventor
Alexander Leonhardt
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.)
GEA Group AG
Original Assignee
Metallgesellschaft AG
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 Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of EP0019953A1 publication Critical patent/EP0019953A1/de
Application granted granted Critical
Publication of EP0019953B1 publication Critical patent/EP0019953B1/de
Expired 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
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/2406—Binding; Briquetting ; Granulating pelletizing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/12—Apparatus having only parallel elements
    • B07B1/14—Roller screens

Definitions

  • the invention relates to a roller grate for transporting green pellets and sieving undersize, consisting of a series of one behind the other, horizontally, and at a distance from each other arranged rollers, the distance between the rollers is smaller than the smallest diameter of the pellets and rollers to be transported with a screen spacing are arranged, the rollers are mounted transversely to the conveying direction of the pellets and rotatably in a frame and are connected to a drive device for driving the rollers in the conveying direction of the pellets.
  • ores or metallurgical intermediates are pelletized in a moist state.
  • the green pellets thus produced with a diameter of generally about 5 to 25 mm, have a low mechanical strength. For this reason, they are generally subjected to thermal curing, which is usually carried out on an internal combustion engine. Due to the sensitivity of the green pellets to mechanical stress, the transport of the green pellets to the internal combustion engine must be carried out very gently. This gentle transport takes place by means of a roller grate, in which the rollers are arranged one behind the other and driven in the conveying direction. The distance between the rollers is smaller than the smallest diameter of the pellets, but larger than the grain size of undesirable undersize, such as. B. pellet breakage or abrasion.
  • the invention has for its object to provide a roller grate in which an impairment - the sieving effect and gentle transport by caking is avoided with simple means.
  • This object is achieved according to the invention in that two rollers are arranged side by side in pairs with a cleaning distance and in each case the next roller pair is arranged with a screen distance to the previous roller pair.
  • the cleaning interval is considerably less than the sieve interval.
  • each role of a pair of roles acts as a cleaning role for the other role. This maintains the screen distance between the last and first roll of successive pairs of rolls and the first and last roll are also cleaned.
  • the cleaning distance within the roller pairs i.e. H. the distance between the rollers of a pair of rollers is chosen so that the desired sieve distance between successive pairs of rollers is not undercut even when forming on the rollers.
  • the roller grate can be arranged horizontally or slightly inclined when viewed in the conveying direction. If sufficient, only a part or several parts of the entire transport route for the green pellets can be equipped with the device according to the invention.
  • Each roller can be driven separately by a motor, or the rollers are driven in pairs by a motor and are connected to one another by a chain.
  • a preferred embodiment is that the screen distance is about 6 to 8 mm and the smaller distance is about 2 to 3 mm. With these intervals a good sieving effect and a good cleaning is achieved.
  • the arrangement of two roller grates one above the other makes it possible to sieve oversized pellets on the upper roller grate.
  • the sieve spacing of the upper roller grate is set so that it only allows pellets with the desired diameter and smaller ones to pass through.
  • the lower roller grate then works as usual.
  • Two rolls 1 and 1a, 2 and 2a, 3 and 3a, 4 and 4a are arranged in pairs with the cleaning distance 5 next to each other.
  • the roller pair 2, 2a is arranged with the sieve spacing 6 to the roller pair 1, 1a, and the roller pair 3, 3a with the sieve spacing 6 to the roller pair 2, 2a etc.
  • the green pellets are fed with the belt 7 abandoned the roller grate.
  • the rollers 1 to 4 and 1 a to 4a are rotatably mounted with their axes 8 in the frame 9.
  • Gears 10 are attached to one side and are connected to a chain 11.
  • a motor, not shown, is connected to the couplings 12. If caking forms on the rollers, the strength of which exceeds the lower cleaning distance 5, the roller pairs 1, 1, etc. clean each other.
  • the material falling through the spacings of the roller grate falls onto a conveyor belt 13 and is transported away from it.
  • the pellets are the sch matically shown moving grate 14 abandoned.
  • Most undersize falls through the screen gaps 6.
  • fine-grained material also falls through the cleaning gaps 5 as long as they have a sufficient gap width.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Combined Means For Separation Of Solids (AREA)
EP80200401A 1979-05-31 1980-04-29 Rollenrost zum Transport von Grünpellets Expired EP0019953B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2922174 1979-05-31
DE19792922174 DE2922174A1 (de) 1979-05-31 1979-05-31 Rollenrost zum transport von gruenpellets

Publications (2)

Publication Number Publication Date
EP0019953A1 EP0019953A1 (de) 1980-12-10
EP0019953B1 true EP0019953B1 (de) 1982-11-17

Family

ID=6072165

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80200401A Expired EP0019953B1 (de) 1979-05-31 1980-04-29 Rollenrost zum Transport von Grünpellets

Country Status (7)

Country Link
US (1) US4316543A (enExample)
EP (1) EP0019953B1 (enExample)
BR (1) BR8003415A (enExample)
CA (1) CA1159401A (enExample)
DE (2) DE2922174A1 (enExample)
IN (1) IN149966B (enExample)
MX (1) MX151595A (enExample)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT385503B (de) * 1986-10-14 1988-04-11 Wageneder Sbm Gmbh Fahrrbare einrichtung zur sortierung von kompostbestandteilen
US5287977A (en) * 1992-12-18 1994-02-22 Tirschler Ehrenfried A Roller system for use in a roller screen
ES2079269B1 (es) * 1993-06-10 1998-05-01 Asigran S L Mejoras en maquinas lavadoras de aceitunas.
FI97527C (fi) * 1995-02-15 1997-01-10 Sunds Defibrator Loviisa Oy Menetelmä ja laitteisto epäpuhtauksien poistamiseksi jauhemaisesta tai palamaisesta materiaalista, erityisesti lastu- tai kuitumateriaalista
US6053330A (en) * 1999-02-25 2000-04-25 Met-Chem Canada, Inc. Adjustable roller screen
CN100446874C (zh) * 2007-06-19 2008-12-31 登封电厂集团铝合金有限公司 滑辊筛
BR102012009007B1 (pt) * 2012-04-17 2021-04-13 Samarco Mineração S/A Sistema de alimentação das pelotas cruas em fornos tipo grelha móvel utilizando segregação granulométrica
US9585296B1 (en) * 2015-08-31 2017-03-07 Versarake, Llc Rock rake attachment for engineering vehicle
DE102017104394A1 (de) * 2017-03-02 2018-09-06 Outotec (Finland) Oy Vorrichtung und Verfahren zur Beschickung eines Stetigförderers
CN108246459B (zh) * 2018-01-18 2018-12-25 哈尔滨学院 一种建筑废料破碎装置
CN112047001A (zh) * 2020-09-30 2020-12-08 张家港宏昌钢板有限公司 一种用于多辊传动的布设方法
CN112407757A (zh) * 2020-10-29 2021-02-26 和进(滁州)自动化科技有限公司 一种具有多级筛选功能的工业物流传送带
EP4284560A4 (en) 2021-01-29 2025-04-16 102062448 Saskatchewan Ltd PROCESS FOR PRODUCING PELLETS

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE148108C (enExample) *
DE576786C (de) * 1933-05-16 Maschb Act Ges Reinigungsvorrichtung fuer Klassierroste
DE564412C (de) * 1930-03-21 1932-11-18 Kurt J Menning Reinigungsvorrichtung fuer Glattwalzenroste zum Absieben anbackender Stoffe mit einem quer zur Achse der Walze angeordneten, parallel zu diesen hin und her bewegten, durch Federn gegen die Walzen gedrueckten Abstreifer
US2370539A (en) * 1943-06-21 1945-02-27 Hodecker Fred Grader or sizer
US2988781A (en) * 1958-01-02 1961-06-20 Dravo Corp Method of conveying green pelletized material
DE1063811B (de) * 1958-01-02 1959-08-20 Metallgesellschaft Ag Verfahren und Vorrichtung zur Foerderung von gruenen Pellets
US3438491A (en) * 1966-12-05 1969-04-15 Reserve Mining Co Conveying and classifying apparatus
US3851753A (en) * 1970-06-15 1974-12-03 Thomson R Roller cleaning mechanism
US3848744A (en) * 1972-12-04 1974-11-19 J Flaherty Green pellet sizing screen
US3848741A (en) * 1973-06-22 1974-11-19 Reserve Mining Co Adjustable, sealed roll screen for classifying and conveying material-in-process such as taconite pellets
FI56131C (fi) * 1976-10-19 1979-12-10 Outokumpu Oy Rullsikt
US4102502A (en) * 1976-12-10 1978-07-25 W. R. Grace & Co. Concentration of plate-shaped minerals

Also Published As

Publication number Publication date
BR8003415A (pt) 1981-01-05
CA1159401A (en) 1983-12-27
EP0019953A1 (de) 1980-12-10
DE3061093D1 (en) 1982-12-23
IN149966B (enExample) 1982-06-19
DE2922174A1 (de) 1980-12-11
MX151595A (es) 1985-01-02
US4316543A (en) 1982-02-23

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