Combination oxidation-reducing roasting rotary hearth furnace
A technology of oxidative roasting and rotary hearth furnace, applied in furnace, charge, furnace type, etc., can solve the problems of poor direct reduction effect, uneven heating of materials, single function, etc., and achieve good reduction effect, low cost and low energy consumption Effect
Pending Publication Date: 2017-02-15
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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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
Method used
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[0031] The specific embodiments of the present invention will be described in more detail below with reference to the drawings and examples, so as to better understand the solution of the present invention and its advantages in various aspects. However, the specific embodiments and examples described below are for the purpose of illustration only, rather than limiting the present invention.
[0032] like figure 1 and figure 2 As shown, the embodiment of the present invention provides a combined oxidation-reduction roasting rotary hearth furnace, including a furnace body 1 , a furnace bottom 2 , a retaining wall 3 , a flue 4 and a burner 5 .
[0033] The furnace body 1 includes an outer side wall, a furnace roof and an inner side wall, the outer side wall is connected to the inner side wall through the furnace roof, and the cross-sectional area of the furnace body is ring-shaped.
[0034] The furnace bottom 2 is annular and located below the furnace body 1, and the furnace...
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Abstract
The invention discloses a combination oxidation-reducing roasting rotary hearth furnace. The combination oxidation-reducing roasting rotary hearth furnace comprises a furnace body, a furnace bottom, a retaining wall, flues and a combustor; the furnace bottom is annular and is located below the furnace body, and an annular space is formed by the furnace bottom and the furnace body; the retaining wall is arranged in the furnace body and is connected with the outer side wall, the furnace top and the inner side wall, the annular space is divided into an oxidation roasting area and a reducing roasting area through the retaining wall, the retaining wall comprises a hollow retaining wall and a solid retaining wall, a reducing agent inlet is formed in the hollow retaining wall, and the interior of the hollow retaining wall is vertically through; the flues are arranged on the furnace top of the oxidation roasting area, and are evenly arranged in the round direction. According to the rotary hearth furnace, oxidation roasting and reducing roasting of materials are completed in an integrated manner, the reducing effect is good, and the running cost is low.
Description
technical field [0001] The invention belongs to the technical field of metallurgical equipment, and in particular relates to a combined oxidation-reduction roasting 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 cir...
Claims
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IPC IPC(8): F27B13/02F27B13/06C21B13/10
CPCF27B13/02C21B13/105F27B13/06F27M2003/165F27M2003/167
Inventor 徐刚任中山闫方兴曹志成薛逊吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST