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Rotary kiln for directly reducing iron-containing material

A rotary kiln, direct technology, applied in the field of rotary kiln, can solve the problems of low metallization rate of products, uneven gas combustion, poor temperature precision control, etc., to improve the service life, realize long-term continuous and stable production, and realize the effect of combustion

Active Publication Date: 2020-11-13
CENT IRON & STEEL RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, this application aims to provide a rotary kiln for direct reduction of iron-containing materials, which solves the problem of uneven gas combustion, large temperature fluctuations, poor temperature precision control, easy ring formation in the kiln, and kiln lining problems in the existing rotary kiln. Problems such as short life and low metallization rate of products

Method used

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  • Rotary kiln for directly reducing iron-containing material
  • Rotary kiln for directly reducing iron-containing material
  • Rotary kiln for directly reducing iron-containing material

Examples

Experimental program
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Embodiment 1

[0040] This embodiment provides a rotary kiln for direct reduction of iron-containing materials, see Figure 1 to Figure 4 , comprising a kiln body 1, an air duct 2 in the kiln and an air duct burner 3, the air duct 2 in the kiln is arranged on the inner wall of the kiln body 1 along the axial direction of the kiln body 1, and the number of the air duct burners 3 is multiple, many An air duct burner 3 is arranged on the side wall of the kiln inner air duct 2 along the axial direction of the kiln inner air duct 2, and the air duct burner 3 and the kiln inner air duct 2 are welded.

[0041] It can be understood that, in order to support the rotary kiln and realize the rotation of the rotary kiln, the above-mentioned rotary kiln also includes a drive assembly 4 (for example, a drive motor, etc.) for driving the kiln body 1 to rotate and a support assembly 5 for supporting the kiln body 1 (eg, support brackets, etc.).

[0042] During implementation, the iron-containing material a...

Embodiment 2

[0055] This embodiment provides a rotary kiln for direct reduction of iron-containing materials. Its structure is basically the same as that of the rotary kiln for direct reduction of iron-containing materials provided in Example 1. Correspondence between wind components.

[0056] Exemplarily, the air ducts 2 in the kiln are in one-to-one correspondence with the air supply components, that is to say, each air duct 2 in the kiln is equipped with a separate air supply assembly. It should be noted that during the rotation of the kiln body 1, the kiln body The lower part of 1 will be covered by iron-containing materials. At this time, the air duct burner 3 located at the lower part of the kiln body 1 cannot supply air. Therefore, the above-mentioned rotary kiln also includes a timing switch controller for controlling the timing switch of the air supply component. The device controls the air supply component to open and close periodically with the rotation of the kiln body 1, so th...

Embodiment 3

[0061] This embodiment provides a rotary kiln for direct reduction of iron-containing materials, see Figure 5 , its structure is basically the same as that of the rotary kiln for the direct reduction of iron-containing materials provided in Example 1, the difference is that there is only one air duct 2 in the kiln, and the air outlet of the air duct burner 3 extends to the axis of the kiln body 1 Location.

[0062] Compared with the prior art, the beneficial effects of the rotary kiln for direct reduction of iron-containing materials provided in this embodiment are basically the same as those of the rotary kiln for direct reduction of iron-containing materials provided in Example 1, and will not be repeated here.

[0063] In addition, the number of air duct 2 in the kiln is one, and the air outlet hole of the air duct burner 3 is extended to the axis position of the kiln body 1, and the supporting gas radiates outward from the center position in the kiln, which can ensure the...

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Abstract

The invention discloses a rotary kiln for directly reducing an iron-containing material, belongs to the technical field of non-blast furnace ironmaking, and solves the problems of non-uniform gas combustion, large temperature fluctuation, poor temperature precision control, easiness in ring formation in the kiln, short service life of a kiln lining, low product metallization rate and the like in the conventional rotary kiln. The rotary kiln for directly reducing the iron-containing material comprises a kiln body, an in-kiln air pipe, a plurality of air pipe burners, a driving assembly used fordriving the kiln body to rotate and a supporting assembly used for supporting the kiln body, wherein the in-kiln air pipe is arranged on the inner wall of the kiln body in the axial direction of thekiln body, and the plurality of air pipe burners are arranged on the side wall of the in-kiln air pipe in the axial direction of the in-kiln air pipe. The rotary kiln for directly reducing the iron-containing material can be used for directly reducing the iron-containing material.

Description

technical field [0001] The application belongs to the technical field of coal-based non-blast furnace direct reduction ironmaking, and in particular relates to a rotary kiln for direct reduction of iron-containing materials. Background technique [0002] Blast furnace ironmaking is the most important ironmaking process in the world today. It has the characteristics of large production scale, low energy consumption, good pig iron quality and high efficiency. However, there are two main problems in blast furnace ironmaking: first, the raw materials for blast furnace ironmaking require a certain particle size and strength, and iron ore powder needs to be prepared into sinter or pellets before it can be put into the furnace, and the sintering and pelletizing process can Second, blast furnace ironmaking needs to use a large amount of high-quality coke, and the shortage of coking coal resources and the discharge of waste water and gas from the coking process restrict the productio...

Claims

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Application Information

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IPC IPC(8): C21B13/08
CPCC21B13/08C21B2100/66
Inventor 高建军万新宇王锋严定鎏齐渊洪许海川
Owner CENT IRON & STEEL RES INST
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