US3870447A - Scrapers for pelletizing disks - Google Patents

Scrapers for pelletizing disks Download PDF

Info

Publication number
US3870447A
US3870447A US459608A US45960874A US3870447A US 3870447 A US3870447 A US 3870447A US 459608 A US459608 A US 459608A US 45960874 A US45960874 A US 45960874A US 3870447 A US3870447 A US 3870447A
Authority
US
United States
Prior art keywords
scraper
silicon carbide
pelletizing
scrapers
pelletizing disks
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
US459608A
Other languages
English (en)
Inventor
Hans Skretting
Ole Egeland
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.)
Elkem ASA
Original Assignee
Elkem Spigerverket AS
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 Elkem Spigerverket AS filed Critical Elkem Spigerverket AS
Application granted granted Critical
Publication of US3870447A publication Critical patent/US3870447A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B01J2/14—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in rotating dishes or pans
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/09—Stirrers characterised by the mounting of the stirrers with respect to the receptacle
    • B01F27/091—Stirrers characterised by the mounting of the stirrers with respect to the receptacle with elements co-operating with receptacle wall or bottom, e.g. for scraping the receptacle wall

Definitions

  • pelletizing disks are used to convert finely divided materials such as ore concentrates into pellets whereby their use value is markedly increased as for example if they are to be used in electric smelting furnaces.
  • these pelletizing disks employ one or more scraping members in order to maintain the bottom and side walls of the pelletizing disk clean, and also to prevent piling up of the finely divided material thereby reducing pelletizing efficiency. In some instances the scrapers are stationary whereas in others they rotate.
  • each scraper is usually formed of a very hard metal in order to reduce wear on the scraping surface.
  • Typical of these hard metals are sintered tungsten/cobalt carbide alloys.
  • hard metals such as sintered tungsten/cobalt carbide alloys are very expensive to buy and the expense in terms of wear of using such materials can about to $30-70 or even more per 100 tons of pellets produced depending upon the particular hard metal and the particular finely divided material being pelletized. This is quite a substantial expense and it would be highly beneficial to be able to reduce this expense.
  • the silicon carbide is utilized in rod form in a surrounding tube of steel as is shown in the FIGURE.
  • the silicon carbide rod is embedded in a surrounding tube suitably of steel 12.
  • the silicon carbide rod 10 is suitably affixed to the steel tube 12 by means of molten sulphur or other similar known attachment means.
  • the surrounding tubular holder 12 is preferably open as shown at 13 at the working surface of the silicon carbide rod 10 so that the annular surface 14 of the silicon carbide rod 10 is in contact with the pelletizing disk 16 to effect the necessary scraping action.
  • the scraper is held in position by suitably adjustable means (not shown). As the silicon carbide surface 14 wears away, the entire assembly of the scraper 18 is lowered towards the pelletizing disk 16.
  • the metal tube 12 will of course wear away but this will not be at all deleterious to continuing the scraping effect of the silicon carbide rod 10 and in fact will help to support the silicon carbide rod throughout its useful life.
  • a pelletizing disk apparatus for the formation of pellets from finely divided material comprising a pelletizing disk and at least one scraper, the improvement comprising having the working edge of the scraper composed of a silicon carbide rod rigidly affixed in a surrounding tubular holder.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
US459608A 1973-04-13 1974-04-10 Scrapers for pelletizing disks Expired - Lifetime US3870447A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO1545/73A NO131893C (enrdf_load_stackoverflow) 1973-04-13 1973-04-13

Publications (1)

Publication Number Publication Date
US3870447A true US3870447A (en) 1975-03-11

Family

ID=19878272

Family Applications (1)

Application Number Title Priority Date Filing Date
US459608A Expired - Lifetime US3870447A (en) 1973-04-13 1974-04-10 Scrapers for pelletizing disks

Country Status (10)

Country Link
US (1) US3870447A (enrdf_load_stackoverflow)
AU (1) AU6767274A (enrdf_load_stackoverflow)
BR (1) BR7402810D0 (enrdf_load_stackoverflow)
CA (1) CA1016354A (enrdf_load_stackoverflow)
FI (1) FI59122C (enrdf_load_stackoverflow)
IN (1) IN141797B (enrdf_load_stackoverflow)
NO (1) NO131893C (enrdf_load_stackoverflow)
SE (1) SE390895B (enrdf_load_stackoverflow)
YU (1) YU84574A (enrdf_load_stackoverflow)
ZA (1) ZA741810B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4610615A (en) * 1984-06-09 1986-09-09 Santrade Ltd. Apparatus for the production of granules
CN104117322A (zh) * 2014-06-30 2014-10-29 广东联塑机器制造有限公司 一种用于塑料管制备的混料机桨叶

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2941248A (en) * 1958-01-06 1960-06-21 Gen Electric High temperature high pressure apparatus
US3199465A (en) * 1963-05-31 1965-08-10 Cunningham & Sons Pelleting machine having restricted passages
US3407756A (en) * 1962-10-15 1968-10-29 George W. Morse Hay wafering apparatus
US3581678A (en) * 1969-03-12 1971-06-01 Charles R Landers Pellet mill with bearing and wear translative element
US3743462A (en) * 1971-07-23 1973-07-03 California Pellet Mill Co Traversing roll type extruder

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2941248A (en) * 1958-01-06 1960-06-21 Gen Electric High temperature high pressure apparatus
US3407756A (en) * 1962-10-15 1968-10-29 George W. Morse Hay wafering apparatus
US3199465A (en) * 1963-05-31 1965-08-10 Cunningham & Sons Pelleting machine having restricted passages
US3581678A (en) * 1969-03-12 1971-06-01 Charles R Landers Pellet mill with bearing and wear translative element
US3743462A (en) * 1971-07-23 1973-07-03 California Pellet Mill Co Traversing roll type extruder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4610615A (en) * 1984-06-09 1986-09-09 Santrade Ltd. Apparatus for the production of granules
CN104117322A (zh) * 2014-06-30 2014-10-29 广东联塑机器制造有限公司 一种用于塑料管制备的混料机桨叶

Also Published As

Publication number Publication date
NO131893B (enrdf_load_stackoverflow) 1975-05-12
NO131893C (enrdf_load_stackoverflow) 1975-08-20
BR7402810D0 (pt) 1974-12-24
FI59122C (fi) 1981-06-10
AU6767274A (en) 1975-10-09
FI59122B (fi) 1981-02-27
YU84574A (en) 1982-05-31
CA1016354A (en) 1977-08-30
IN141797B (enrdf_load_stackoverflow) 1977-04-23
ZA741810B (en) 1975-11-26
SE390895B (sv) 1977-01-31

Similar Documents

Publication Publication Date Title
US3768984A (en) Welding rods
GB1455221A (en) Method of melt reduction
JPS54149308A (en) Sintered compact for cutting tool and manufacture thereof
US3870447A (en) Scrapers for pelletizing disks
GB2114968A (en) Apparatus for charging a glass melting tank furnace
EP0512805A3 (en) Hard surfacing alloy with precipitated metal carbides and process
USRE27851E (en) Hard facing alloy composition and method of manufacture
US2299871A (en) Cutting metal alloy
GB1070039A (en) Improved heterogeneous facing composition
CN208066419U (zh) 一种新型颚式破碎机
US3000087A (en) Sintered tungsten carbide alloy product
DE3063965D1 (en) Tungsten carbide-based hard metals
SU439361A1 (ru) Присадочный материал дл наплавки
JPS56116859A (en) Roll material having excellent cutting property and wear resistance
US2167516A (en) Sintered hard metal composition
SU367989A1 (ru) Би&лиотемл
US2246166A (en) Sintered hard-metal alloy for implements and tools
Kieffer et al. Recycle of tungsten carbide and mill scrap
DE1914424A1 (de) Elektroden zum Widerstandsschweissen von beschichteten Stahlblechen
US4728400A (en) Method and apparatus for extraction of amalgamatable metals from a slurry
SU449100A1 (ru) Способ модифицировани молибдена и его сплавов
GB1423165A (en) Vacuum switch contact material
SU382795A1 (enrdf_load_stackoverflow)
JPS54161509A (en) Soldering tool
Riles History and present operation of the heavy medium separation plant at Renison Limited, Tasmania