Process to produce manganese pellets from non-calcinated manganese ore and agglomerate obtained by this process
AssigneeVale S.A.
InventorsWashington Luiz Mafra, João Batista Conti de Souza
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Abstract
It is described a manganese pellet production from non-calcinated manganese ore, comprising the following phases: (a) ore size preparation through ore classification by function of particle size, smaller or equal to 1 mm particles being maintained from the ore particle fraction process so as to have a smaller or equal to 1 mm size, as well as the comminution of these particles; (b) flux addition; (c) agglomerant addition; (d) pelletizing resulting in crude pellets; and (e) thermal processing through crude pellet drying, pre-heating and heating.
Claims13
A process to produce manganese pellets from non-calcinated manganese ore comprising:
- ore size preparation through ore classification by particle size smaller or equal to 1 mm particles and comminution of the particles;
- flux addition;
- agglomerant addition, wherein the agglomerant is selected from a group consisting of bentonite at 0.5% to 2.0% by mass, hydrated lime at 2.0% to 3.0% by mass, carboximetilcelulose (CMC) at 0.05% to 0.1% by mass, and mixtures thereof;
- pelletizing resulting in crude pellets;
- and
- thermal processing through drying, pre-heating and heating the crude pellets.
A process for producing manganese pellets from non-calcinated manganese ore comprising:
- ore size preparation through ore classification by particle size smaller or equal to 1 mm particles and comminution of the particles, wherein the ore size preparation results in 40 to 60% by mass of ore particles comprising a size smaller than 0.044 mm;
- flux addition;
- agglomerant addition of bentonite at 0.5% to 2.0% by mass;
- pelletizing resulting in crude pellets;
- and
- thermal processing through drying, pre-heating and heating the crude pellets.
Dependencies are inferred from the claim text.