Oxidation-reduction roasting integrated rotary hearth furnace

Abstract

The invention discloses an oxidation-reduction roasting integrated rotary hearth furnace. The oxidation-reduction roasting integrated rotary hearth furnace comprises a furnace body, a furnace bottom, retaining walls, a chute, flues and a combustor; the furnace body includes an outer side wall, a furnace top and an inner side wall; the outer side wall is connected with the inner side wall through the furnace top; the cross sectional area of the furnace body is annular; the furnace bottom is annular, and is positioned below the furnace body; the furnace bottom and the furnace body form an annular space; the retaining walls are arranged in the furnace body; two retaining walls are provided; the retaining walls are connected with the outer side wall, the furnace top and the inner side wall; the retaining walls divide the annular space into an oxidation roasting area and a reduction roasting area; the flues are arranged at the furnace top of the oxidation roasting area; multiple flues are uniformly arranged in the circular direction; and the combustor is mounted on the furnace body. The rotary hearth furnace can integrally finish oxidation roasting and reduction roasting of materials, and is excellent in reduction effect and low in operation cost.

Description

technical field [0001] The invention belongs to the technical field of metallurgical equipment, in particular to an oxidation-reduction roasting integrated rotary hearth furnace. Background technique [0002] Rotary hearth furnace direct reduction process is a new process developed in the past 30 years for ironmaking and processing of special non-ferrous metal ores. Rotary hearth furnace direct reduction saves the blast furnace coking process, and is an energy-saving and environmentally-friendly technology. Because this process has low requirements on raw materials and fuels and can make rational use of natural resources, it has attracted great attention from the metallurgical and nonferrous industries. [0003] The rotary hearth furnace is composed of oil ring hearth, inner and outer walls, furnace roof, combustion system and so on. The side wall and furnace roof are fixed, and the hearth is driven by the transmission mechanism of the furnace bottom to rotate circularly. ...

AI Technical Summary

Problems solved by technology

[0008] Although the current rotary hearth furnace has a large processing capacity, it has a single function and only has a reduction effect. It has poor direct reduction effect on some raw materials that need to be oxidized and roasted, which limits the use of the rotary hearth furnace; Problems such as uncontrollable atmosphere and uneven heating of materials need to be improved

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