Hylsa, S.a. De C.v.

Maria Teresa Guerra-Reyes

Jorge O Becerra-Novoa

Raul Gerardo Quintero-Flores

Juan Celada-Gonzalez

Jorge D Berrun-Castanon

Ronald Victor Manuel Lopez-Gomez

Miguel Angel Pedroza-Contreras

Jos&eacute; Mari&aacute; Eloy Aparicio-Arranz

Leopoldo I Ruiz-Leal

Juan Antonio Villarreal-Trevi&ntilde;o

Mario Alberto Salinas-Fern&aacute;ndez

So as to provide a container that is inexpensive to manufacture and that promotes a uniform flow of particulate bulk materials therethrough, a vessel is suggested comprising at least two wall segments having a generally downwardly converging wall defining a vertical axis for the vessel, a first upper segment being vertically arranged above a second lower segment, each one of the wall segments having an upper edge and a lower edge, the perimeter of the upper edge of the second lower wall segment being larger than the perimeter of the lower edge of the first upper wall segment the lower edge of the first upper wall segment and the upper edge of the second lower wall segment being positioned proximate to each other and cooperating to provide an enlargement of the cross-sectional area of the volume occupied by the particulate solid material.

Vessel for enabling a uniform gravity driven flow of particulate bulk material therethrough, and direct reduction reactor incorporating same

The present invention relates to a method and apparatus for separating undesired toxic metals, such as Zn, Pb and Cd, from iron-containing materials by: sintering a mixture of such materials (typically including EAF dust and mill scale) with carbonaceous particles to form sturdy sinter lumps; preheating such lumps in a non-reducing atmosphere, if needed, to achieve an elevated temperature generally above the vaporization temperature of the undesired metals, but below the sticking temperature of iron-containing lumps (which is typically below the vaporization temperatures of such undesired metals in their oxide form), feeding the lumps at such elevated temperature into a reduction reactor; flowing hot reducing gas through lumps to volatilize undesired reduced metals and carry the volatilized metals out of reduction reactor leaving the iron-containing lumps largely stripped of the undesired metals and ready for discharge and safe and/or useful disposal or re-use, and finally cooling the off gas from the reactor to separate out the resulting solidified unwanted metals (typically in their oxide form resulting from a water quench cooling).

Method and apparatus removing undesirable metals from iron-containing materials

At least a percentage of iron ore pellets and the like for use in a direct reduction process for the production of sponge iron are coated with a thin porous coating of Portland cement to counteract tendency to aggregate. This is accomplished by method and apparatus that mixes water and cement powder at the point of delivery in a manner such that no pumps are subjected to a wet cement slurry. The slurry is mixed and maintained in suspension by air agitation in a bin and then flowed through a bin discharge pipe and sprayed therefrom onto a passing layer of pellets in a controlled manner by regulated air injection into the discharage pipe.

Method for coating iron-bearing particles to be processed in a direct

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Nuevo Leon, Mexico

Maria Teresa Guerra-Reyes