摘要:
Feinkörniges eisenoxidhaltiges Material wird in einer Wirbelschicht vorreduziert und anschließend in einem Drehrohrofen fertigreduziert. Zur Vermeidung von Agglomeraten und Ansatzbildung im Drehrohrofen wird die Vorreduktion auf eine Metallisierung von 50 bis 80% durchgeführt.
摘要:
The present invention addresses the problem, in methods for producing a metal or alloy by reducing a mixture that contains an oxide ore, of providing an oxide ore smelting method with good productivity and efficiency. The present invention is an oxide ore smelting method for producing a metal or alloy by reducing a mixture that contains an oxide ore, the method comprising at least: a mixing step S1 for mixing an oxide ore with a carbonaceous reducing agent; a mixture-molding step S2 for molding the mixture obtained to obtain a mixture-molded body; and a reducing step S3 for heating the mixture-molded body obtained at a specified reducing temperature in a reducing furnace.
摘要:
The present invention relates to a method and apparatus for producing reduced iron from ironmaking dust which contains iron oxide which is generated at an ironmaking plant, takes note of the rotary kiln reduction method which does not require pretreatment of the dust, and has as its problem the pursuit of facilities which achieve further improvement of heat efficiency and stable operation. To solve this problem, the present invention is characterized by heating and reducing carbon-containing shaped materials in a single closed space in which an internal heat type rotary kiln and an external heat type rotary kiln are arranged in series and including at least the insides of the two rotary kilns during which making the reduced exhaust gas which is generated at the external heat type rotary kiln burn inside of the internal heat type rotary kiln.
摘要:
A method for producing a granular metal wherein a raw material composed of a material containing a metal oxide and a carbonaceous reducing agent is heated to reduce the metal oxide in the raw material, and the formed metal is further molten by heating and then is coagulated while separating it from the slag by−produced, characterized in that the raw material further comprises a coagulation accelerator for the by−produced slug. The method allows the production of a granular metal having a high metal purity which has a large granule diameter, resulting in its excellent transportability and handleability, in high yield with good productivity.