A material for coating iron ore pelletizing disks and drums and a constructive arrangement for pelletizing disks and drums

Abstract

The invention is directed to a material for coating iron ore pelletizing disks and drums and a constructive arrangement for pelletizing disks and drums that is comprised of a mixture of binders with ores (that may or not be ground) of the group consisting of iron, manganese or others, the inclusion of fluxes being also provided. The bottom (1) of the disk or drum (5) is coated with a cold cure coating material, vegetal oils, minerals and / or gel-forming products in order to form a bottom layer (2) that may or not be on the surface, and polyethylene plates (7) to aid in the separation of the fines from the pellets (6) can also be incorporated into the inner perimetral edge (6) of said pelletizing disk or drum (5).

Description

technical field [0001] The present invention relates to a mixture of a binder and a plurality of ores having the same or different properties as the granulation material, said mixture being used for the inner coating layer of iron ore granulation discs and drums, and in particular to a A mixture of binding material intended to form the bottom and side layers of a granulation disc and a granulation drum also relates to a construction of a granulation disc. Background technique [0002] In mining, fine iron ore from mines is either ground up with fluxes (limestone, D-dynamite, magnesite, etc.) or dispersed separately, followed by the addition of binders (calcium hydroxide, bentonite, organic binder, etc.) for binding the particles. [0003] During granulation, this pre-homogenized mixture is granulated using associated equipment, commonly known as granulation discs or plates and drums, in which the fine particles (40-95% through 0.045 mm) are agglomerated to form substantial...

AI Technical Summary

Problems solved by technology

[0009] However, as is known to those skilled in the art, in many instances the mixture to be granulated does not have the appropriate properties required for the granulation process, such as high resistance to plastic as well as elastic deformation

[0010] This inconvenience is mainly due to the high humidity and brittleness of the material usually used to prepare the bottom layer of the disc, considering that the material basically consists of a granulated mixture (ground ore, flux and binder), it is often Causes the material to break away from the underlying layer, thus creating cracks and fissures

[0011] Therefore, due to the identification of such problems on the side and bottom layers of the disc every time a stop is made for a maintenance shutdown, this results in a loss of granulation production commensurate with disc production

[0012] Another inconvenience of the prior art relates to the difficulty in meeting customer requirements for the particle size of the produced pellets

[0013] Another inconvenience in the prior art relates to the increased generation of fines mixed into the raw pellets at the outlet of the pelletizing disc

This increased fines generation subsequently leads to an increased rate of rework, which also represents a loss in production

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