A method for smelting magnesium quickly and continuously includes: preparing dolomite or magnesite with reductants and fluorite at a predetermined ratio, uniformly mixing the prepared ingredients to obtain pellets, and calcining the obtained pellets in an argon or nitrogen atmosphere; continuously feeding the high-temperature calcined pellets (without being cooled) under argon protection into a reduction furnace, and performing a high-temperature reduction reaction in a flowing argon atmosphere to obtain high-temperature magnesium steam; and enabling the high-temperature magnesium steam to be carried out of the high-temperature reduction furnace by an argon flow, and performing condensation to obtain metal magnesium. The present invention eliminates a vacuum system and a vacuum reduction tank, so that quick and continuous production of the metal magnesium is realized, the reduction time is shortened to 90 min or less, and the recovery rate of magnesium is increased to 88% or more.

Provided is a method for producing a pellet capable of suppressing heat shock-induced crack occurrence, when nickel oxide ores are made into pellets and placed in a reducing furnace in a smelting process. In the method for producing a pellet from a nickel oxide ore, a nickel oxide ore, a binder and a carbonaceous reducing agent are mixed, the mixture is made into a lump, and then the resulting lump is subjected to a preheat treatment at a temperature of 350 C. to 600 C. In this preheat treatment, the lump more preferably undergoes the preheat treatment at a temperature of 400 C. to 550 C.

The present invention refers to an effective method for minimizing the problems of iron ore pellet degradation by weathering during their stockpiling, i.e., by providing an appropriate method for improving the state of the art with regard to iron ore pellet resistance related just to the hydration process of the slag phase. Thus, in order to minimize hydration in the slag phase, stabilizers are introduced into the mixture used to produce iron ore pellets prior to being heat-treated.

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.

A pellet production method that can suppress bursting of green pellets can be provided. The method for producing an iron ore pellet includes grinding iron ore with iron content of 63 mass % or less to obtain ore powder, in which a volatile matter of the iron ore is 3.3 mass % or more, the ore powder has a cumulative 90% diameter of 150 m or less in a volume-based particle size distribution and a particle size distribution index based on the harmonic mean diameter of 14,700 or more and 510,000 or less.

The disclosure relates to an arrangement (1) for an induration machine (2) of a pelletizing plant (4), the arrangement (1) comprising: a furnace (6) configured for induration of iron ore pellets (8); an inlet channel (10) connected to the furnace (6), configured for supplying process gases (12) to the furnace (6); an outlet channel (14) connected to the furnace (6), configured for remove the process gases (12) from the furnace (6); and a burner (16) arranged in the inlet channel (10) configured for heating the process gases (12), wherein the burner (16) comprises: a central first burning register (18) configured for supplying hydrogen (20) as injecting fuel; at least one intermediate second burning register (22), which at least partly surrounding the central first burning register (18), and which is configured to inject oxygen (24) as an oxidizing gas to burn together with the hydrogen (20), and at least one outermost third burning register (26), which at least partly surrounding the intermediate second burning register (22), and which is configured to inject a protecting fluid (24, 32) for preventing at least a part of the process gases (12) to burn together with the hydrogen (20) and the oxygen (24) as an oxidizing gas. The disclosure further relates to an induration machine (2) and a method for indurating iron ore pellets (8) in arrangement (1) for an induration machine (2) of a pelletizing plant (4).