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Method for reducing iron mineral powder during transferring process

A technology for iron ore powder and ore powder, which is applied in the field of heating and reduction in the process of ore powder conveying, can solve problems such as powder ore sticking, and achieve the effects of reducing energy consumption and emission and improving production efficiency

Inactive Publication Date: 2008-08-13
SHANGHAI UNIV
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Problems solved by technology

[0003] In order to solve the problems existing in the existing iron ore powder reduction or pre-reduction reaction methods, the present invention provides a transportation reduction method, which not only applies to a wide range of ore powder particle size, but also solves the problem that may occur in fine ore under high reduction degree. Adhesion problem

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  • Method for reducing iron mineral powder during transferring process

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Embodiment Construction

[0011] In Figure 1, the reducing gas with a certain temperature and pressure comes out of the gas source (1) and is divided into two paths, the flow is controlled by the valve (2) and the flow meter (3) respectively, and one path enters the connecting silo as a carrier gas The feeder (6) of (5), another road directly enters the final reduction furnace (11) or Enter the cooling collector (10) for storage. A vibrator (12) is installed at both ends of the tubular reactor, the reaction temperature is adjusted by a temperature controller (13), and the exhaust gas from the collector is treated by a dust removal and purification device (9) before being discharged.

[0012] In the first embodiment shown in Fig. 2, the angle between the tubular reactor (8) and the horizontal line can be adjusted by an inclination regulator (14), and the reducing gas can be preheated by a preheater (15).

[0013] In the second embodiment shown in the figure, different reducing gases (1) can be mixed th...

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Abstract

The invention is a method for heating and reducing iron ore powder in transportation process. A tubular reactor is arranged in a temperature-controllable heater, the inclination angle can be adjusted according to the granularity and surface property of the ore powder, so as to control the reaction time of the ore powder, the ore powder granularity is heated and reduced by the tubular reactor under the comprehensive effect of the push and self-gravity of reducing eluant gas, and the attached tube wall vibrator is used for eliminating bond and attachment appearing under high reduction of ore powder. The method can relax requirement for ore powder granularity scope and refinement for high reduction degree, and is especially suitable for the reduction of micro-fine ore powder. The method can be used for heating and reduction of iron ore powder in transportation process in order to improve production efficiency, and can lower energy consumption and emission of production procedure by use of low-temperature low-pressure reducing gas produced in process.

Description

technical field [0001] The invention relates to a method for reducing iron ore powder, especially a method capable of heating and reducing during the transportation of the ore powder. Background technique [0002] At present, iron ore powder generally needs to be made into pellets or sintered ore before reduction treatment, which not only generates additional energy consumption and cost, but also increases pollution emissions; When performing pre-reduction treatment, not only the particle size range of the required raw materials is narrow, but also the phenomenon of cohesive loss of flow is prone to occur at high reduction rates, which causes obstacles to industrial application. Contents of the invention [0003] In order to solve the problems existing in the existing iron ore powder reduction or pre-reduction reaction methods, the present invention provides a transportation reduction method, which not only applies to a wide range of ore powder particle size, but also solv...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B5/12
Inventor 洪新郑少波
Owner SHANGHAI UNIV
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