Rotary hearth furnace

A technology of rotary hearth furnace and furnace width, applied in the direction of furnace, furnace type, lighting and heating equipment, etc., can solve problems such as disadvantage, reduced radiant energy space, and inability to radiate energy supply, etc., to promote combustion and improve heat generation. , the effect of shortening the uniform mixing time

Inactive Publication Date: 2012-09-12
KOBE STEEL LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, since the combustion heat is generated at a position separated from the inside of the furnace body of the rotary hearth furnace, it is certain that the energy cannot be effectively utilized in the furnace.
Furthermore, since the throttle is provided, the space through which the radiant energy passes is reduced, so it may be disadvantageous in terms of effective use of the radiant energy, and the radiant energy cannot be supplied to the object to be heated.

Method used

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Examples

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Embodiment Construction

[0028] Hereinafter, the present invention will be described in more detail based on the embodiments shown in the drawings.

[0029] For example, if Figure 1 ~ Figure 3 As shown, the rotary hearth hearth furnace 1 of the present invention has a substantially rectangular longitudinal section and is formed in a hollow ring shape, including: an annular outer peripheral wall 1a; with a slightly smaller radius of curvature than the outer peripheral wall 1a An annular inner peripheral wall 1b; an annular plate-shaped top 1c arranged on the upper surface covering between the outer peripheral wall 1a and the inner peripheral wall 1b; The surface of the circular plate-shaped rotary hearth 1d. The rotary hearth furnace 1, especially the outer peripheral wall 1a, the inner peripheral wall 1b, and the ceiling 1c are formed of a refractory material having heat insulating properties.

[0030] In addition, a plurality of vertical walls 2 hang down from the lower surface of the annular plat...

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Abstract

Provided is a rotary hearth furnace which can stir exhaust gas within a furnace, to efficiently burn flammable gas within the exhaust gas and to efficiently heat an object to be heated, and which can contribute to reduction of specific energy consumption and improvement of productivity. A rotary hearth furnace (1) has therein a series of zone spaces (3) which are divided by vertical walls (2) hanging from a ceiling (1c). Among the zone spaces (3), the zone space to which an exhaust gas duct (4) is attached is constructed as an exhaust zone (3a). An oxygen-containing gas supply unit (5) is provided in the vicinity of the lower edge of the vertical wall (2) which divides the exhaust zone (3a) from the other zone spaces (3). Further, the exhaust gas duct (4) is disposed on the outer periphery side or the inner periphery side from the center of the width of the zone space (3).

Description

technical field [0001] The present invention relates to a rotary hearth furnace using dust or iron ore generated in ironworks or the like as raw materials. More specifically, the present invention relates to a device capable of efficiently combusting combustible gas generated from a carbon material contained in a block (hereinafter, described as a heated object) supplied into a furnace, and fuel injected into a furnace. Rotary hearth furnace. Background technique [0002] In recent years, a manufacturing method using a rotary hearth furnace has attracted attention. In this production method, the object to be heated obtained by mixing iron ore or ironworks dust with finely powdered carbon material and forming agglomerates is supplied and heated in a furnace to produce reduced iron, and in the reduction treatment process In the process, zinc and lead in the object to be heated are reduced and vaporized to separate, remove and capture zinc and lead. The object to be heated i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B9/16
CPCF27B9/16F27B9/3005
Inventor 立石雅孝堤博文宫川裕八十格
Owner KOBE STEEL LTD
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