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Method for flash smelting iron and iron-making furnace thereof

A flash smelting furnace and flash smelting technology, applied in the method and its ironmaking furnace, new flash smelting iron field, can solve the problem of low heat exchange efficiency between iron ore sand and high-temperature reducing gas, unfavorable iron ore powder and reduction Reactive gas is fully reacted, short, generally no more than 5 seconds, etc., to achieve the effect of controllable reduction reaction process, compact structure, and reduced smelting cost

Inactive Publication Date: 2019-05-10
李淼
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  • Claims
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Problems solved by technology

There are two obvious disadvantages in the rapid ironmaking device of this method: one is that the iron ore will quickly pass through the furnace under the action of its own gravity and the downstream gas, that is, the residence time in the furnace is relatively short, generally no more than 5 Second, it is not conducive to the full reaction of iron ore powder and reducing gas at high temperature; second, the heat exchange efficiency between iron ore and high-temperature reducing gas is low, and the exhaust gas temperature is high

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  • Method for flash smelting iron and iron-making furnace thereof
  • Method for flash smelting iron and iron-making furnace thereof
  • Method for flash smelting iron and iron-making furnace thereof

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Embodiment Construction

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0026] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or elem...

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Abstract

The invention discloses a novel flash iron smelting method and an iron smelting furnace thereof. The iron smelting furnace comprises a reaction tower, a furnace charge nozzle and a molten pool, a reaction space is defined in the reaction tower, and the furnace charge nozzle is formed in the top of the reaction tower; the molten pool is arranged at the lower part of the reaction tower, and a towerbody of the reaction tower is of a single-sheet hyperboloid structure generated through a hyperbolic curve rotating around a main axis of the reaction tower; and the lower part of the single-sheet hyperboloid structure is provided with an inlet of fuel and oxygen-enriched gas, the fuel and the oxygen-enriched gas enter the lower part of the reaction space from the inlet, and high-valence iron oxides in iron ore are partially reduced to low-valence iron oxides and a part of metal iron, and the low-valence iron oxides and the part of metal iron fall into the molten pool. The iron smelting furnace has the advantages of compact structure and controllable reaction time and reaction temperature.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a novel method for flash smelting iron and an ironmaking furnace thereof. technical background [0002] Traditional ironmaking mainly adopts blast furnace ironmaking equipment. Using traditional blast furnace ironmaking, iron ore first needs pelletizing, drying, sintering, crushing, smelting and other processes, so there are long processes, large investment, high energy consumption and smelting time. Defects. [0003] In order to solve the above problems, some solutions have been proposed in recent years, [0004] For example, a smelting reduction ironmaking method disclosed in Chinese patent document CN101597661A; [0005] A flash metallurgy method for iron disclosed in Chinese patent document CN102690919B, [0006] Chinese patent document CN102605120A discloses a chamber type blast furnace ironmaking device and an ironmaking method. [0007] They all adopt...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B13/00
CPCC21B13/0006
Inventor 李淼
Owner 李淼
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