A raw material for direct reduction which is reduced in a shaft furnace includes a raw material, and a coating layer which coats the raw material and has a porosity of 20 volume % or more.

A raw material for direct reduction which is reduced in a shaft furnace includes a raw material, and a coating layer which coats the raw material and has a porosity of 20 volume % or more.

Systems of producing hydrogen and biochar from biomass assisted by iron and steel slag extract include: a pretreatment system that the reactants, including the biomass, iron-based catalyst and alkaline reagent, are pretreated and fully mixed at specific ratios in the pretreatment system; thermal reactor that the mixed reactants from the pretreatment device are transferred into and fully reacted in the thermal reactor; a solid residue collector that the solid residue is collected by the solid residue collector at the discharge outlet of the thermal reactor after the reacted mixture is separated; a gas collection system that he generated hydrogen-based gas is collected by the gas collection system from the exhaust port of the thermal reactor.

Systems of producing hydrogen and biochar from biomass assisted by iron and steel slag extract include: a pretreatment system that the reactants, including the biomass, iron-based catalyst and alkaline reagent, are pretreated and fully mixed at specific ratios in the pretreatment system; thermal reactor that the mixed reactants from the pretreatment device are transferred into and fully reacted in the thermal reactor; a solid residue collector that the solid residue is collected by the solid residue collector at the discharge outlet of the thermal reactor after the reacted mixture is separated; a gas collection system that he generated hydrogen-based gas is collected by the gas collection system from the exhaust port of the thermal reactor.

A method for supplying raw material to a sinter plant and facilitating a sinter process with reduced consumption of fossil fuels, provides that a mixed material is used to supply raw material, wherein the mixed material includes particulate iron-containing material and particulate pyrolised biomass in mixed form. The iron-containing material is preferably iron ore and/or the pyrolised biomass is preferably charcoal.

A method for supplying raw material to a sinter plant and facilitating a sinter process with reduced consumption of fossil fuels, provides that a mixed material is used to supply raw material, wherein the mixed material includes particulate iron-containing material and particulate pyrolised biomass in mixed form. The iron-containing material is preferably iron ore and/or the pyrolised biomass is preferably charcoal.

A system and method for recovering a metal value from a metal-bearing material is provided. The method includes agglomerating the metal-bearing material with an agglomeration solution, which contains a raffinate and hydrogen peroxide, to form an agglomerated metal-bearing material. The method further includes leaching the agglomerated metal-bearing material with a leaching solution, which contains the raffinate and citric acid, to produce a pregnant leaching solution. The method further includes recovering the metal value from the pregnant leaching solution to produce the raffinate.

A system and method for recovering a metal value from a metal-bearing material is provided. The method includes agglomerating the metal-bearing material with an agglomeration solution, which contains a raffinate and hydrogen peroxide, to form an agglomerated metal-bearing material. The method further includes leaching the agglomerated metal-bearing material with a leaching solution, which contains the raffinate and citric acid, to produce a pregnant leaching solution. The method further includes recovering the metal value from the pregnant leaching solution to produce the raffinate.

A cooperative emission reduction method for sintering using an energy-carrying composite gas is disclosed. A surface of a sintered material is divided into an ignition section, a heat preservation section, a middle section, a flue gas heating section, and a machine tail section from a machine head to a machine tail of a sintering machine; according to flue gas components, temperature characteristics, and heat requirements of different sections, a hot exhaust gas is introduced to the ignition section for ignition, a hot exhaust gas is introduced to the heat preservation section and a hydrogen-rich gas is cascadingly sprayed synchronously, cascaded spraying of water vapor is coupled based on spraying of a hydrogen-rich gas in the middle section, and the high-temperature flue gas in the machine tail section and the flue gas in the ignition section and/or the heat preservation section are circulated to the heating section.

This invention deals with a system using aqueous means for solubilizing chemical components contained in sulphur type ore concentrate which may contain iron, cobalt, niquel, copper, platinum group metals and other metals considered valuable and of commercial interest. Apart from that, a method using aqueous means for solubilizing such components is described.