Method and apparatus for continuously ensuring sufficient quality of green pellets

Patent metadata

Field	Value
Publication number	US-2021332457-A1
Application number	US-201817291232-A
Country	US
Kind code	A1
Filing date	Nov 6, 2018
Priority date	Nov 6, 2018
Publication date	Oct 28, 2021
Grant date	—

Abstract

A method for controlling pellet quality in iron ore production includes the steps of mixing water, binder and iron ore particles in at least one mixer to form a mixture (step (i)) and pelletizing the mixture into green pellets (step (ii)). Between step (i) and step (ii), a part of the mixture is taken in a sampling operation, formed into a test specimen and subjected to a test.

First claim

1 .- 9 . (canceled)

10 . A method for controlling pellet quality in iron ore production, comprising the steps of:
(i) mixing water, binder and iron ore particles in at least one mixer to form a mixture, and (ii) pelletizing/balling the mixture into green pellets,
wherein between step (i) and step (ii) a part of the mixture is taken in a sampling operation, formed into a test specimen and subjected to a test and the test specimen is subjected to a pressure test.

11 . The method according to claim 10 , wherein at least one storage container is connected downstream of the sampling operation.

12 . The method according to claim 10 , wherein pellet quality is controlled or regulated by using the results of the test as a control variable and the quantity of the added binder and/or the quantity of the added water and/or the incorporated mixing energy as a controlling variable.

13 . The method according to claim 12 , wherein a previously experimentally oriented matrix is deposited from which the controlling variable is determined starting from the control variable.

14 . The method according to claim 10 , wherein the test specimen is a circular cylinder or a prism.

15 . The method according to claim 10 , wherein the method is carried out continuously.

16 . The method according to claim 10 , wherein the green pellets are subsequently burnt.

17 . A device for controlling pellet quality in iron ore production, comprising at least one mixer for mixing water, binder and iron ore particles into a mixture and a pelleting device for pelletizing/balling the mixture into pellets, wherein by a sampling unit arranged downstream of the mixer and upstream of the pelletizing device for taking a part of the mixture, a forming device for producing a pressing from part of the mixture and a test device configured to pressure test the pressing formed by the forming device.

Assignees

• Metso Outotec Finland Oy

Inventors

• Lang Sebastian
• Semiller Karl
• Rannantie Suvi

Classifications

• G01N1/10 Primary

  in the liquid or fluent state {(burettes, pipettes B01L3/02; sampling of ground water E02D1/06; metering by volume of fluids or fluent solid material G01F11/00, G01F13/00)} · CPC title

• G01N2203/0019

  Compressive · CPC title

• C22B1/2406

  pelletizing · CPC title

• C22B1/242 Primary

  with binders · CPC title

• G01N1/286

  involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising (microtomes G01N1/06; pulverising in general B02C; mixing in general B01F) · CPC title