Vale S.a.

Universidade Federal Do Espirito Santo

Reinaldo Walmir De Jesus

Leonidio Stegmiller

Aldo Gamberini Júnior

José Antonino Alves E Silva Reis

Rodrigo Ribeiro De Araujo

Celso De Jesus Silva

Antonio Alves E Silva Reis

Alexandre Soares Pinto

Jose Antonino Alves E Silva Reis

Liliane Durans De Moraes Costa

Antonio Alberto Ribeiro Fernandes

Erica Dutra Albuquerque

Jeferson Da Silva Correa

Mauricio Kuster Cunha

Marlon Christian Marianelli Bastos

Patricia Machado Bueno Fernandes

Poliana Belisário Zorzal

A pelletizing process, having two distinct serial stages. In the first stage, crude (or green) pellets of a given ore, or a mixture of ores (such as iron ore, manganese ore and other minerals), are produced, while in the second stage, a Device for Improvement of Crude Pellets, is used. The Device includes a slightly elastic and smooth surface, with reduced attrition rate, that may be striated, and that, encircled in itself, forms a cylindrical geometric hollow figure supported by a metallic structure, also cylindrical, with the set forming a finishing drum. The Device rotates with an inner and continuous charge of ore pellets, and can rearrange the structure of such pellets, improving their physical quality: compressive strength, sphericity and surface finishing, and assimilate fines generated during previous processes. This device allows application of diverse materials to the pellets to add required extra properties per specificities of subsequent industrial processes.

Device for the improvement of crude pellets and pelletizing process

A process for the inhibition of particulate emission during friction of heat-treated iron ore pellets includes the following steps: a) removal of heat-treated iron ore pellets at a temperature of 200&#xb0; C.; and b) spraying of an alcohol by-product on pellets. The use of an alcohol by-product as an inhibitor of particulate emission is further described, with the alcohol by-product being sprayed on heat-treated iron ore pellets, which can partially or completely replace water during the handling, stacking, loading, and unloading of materials such as pellets, granules, fines, and other products from iron ore and other minerals. This process significantly reduces the emission of particulates in the an operational area.

Process for inhibiting particulate emission during friction of heat-treated iron ore pellets and use of an alcohol by-product to inhibit particulate emission

An advantageous and effective process for obtaining carboxymethyl cellulose (CMC) from agro-industrial residues, comprising the steps of a) Preparing the raw material, wherein the raw material is washed, dried, grounded and washed again; b) a pumping step, wherein the product obtained from the step a) is reacted with sodium hydroxide; c) a synthesis step, wherein consists in grounding the pulp; adding a solution of isopropanol and distilled water under stirring at room temperature; adding NaOH aqueous solution up to the alkalization of the mixture; adding monochloroacetic acid in isopropanol; filtrating; suspending in methanol solution and neutralizing with acetic acid. The CMC obtained from the process can be employed in a several industrial processes.

Process for obtaining carboxymethyl cellulose from agro-industrial residues and carboxymethyl cellulose and use thereof

Growing community of inventors

Vitória, Brazil

Reinaldo Walmir De Jesus