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A rotary kiln for direct reduction of iron-containing materials

A rotary kiln, direct technology, applied in the field of rotary kiln, can solve the problems of low metallization rate of products, large temperature fluctuations, easy ring formation in the kiln, etc.

Active Publication Date: 2021-09-14
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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  • A rotary kiln for direct reduction of iron-containing materials
  • A rotary kiln for direct reduction of iron-containing materials
  • A rotary kiln for direct reduction of iron-containing materials

Examples

Experimental program
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Effect test

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 effect of the rotary kiln for direct reduction of iron-containing materials provided in this embodiment is basically the same as that 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 te...

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Abstract

The application discloses a rotary kiln for direct reduction of iron-containing materials, which belongs to the field of non-blast furnace ironmaking technology, and solves the problems of uneven combustion of gas, large temperature fluctuations, poor temperature precision control, easy ring formation in the kiln, and problems in the existing rotary kiln. Short life of kiln lining, low metallization rate of products and other problems. The rotary kiln for direct reduction of iron-containing materials in this application includes a kiln body, an air duct in the kiln, an air duct burner, a drive assembly for driving the kiln body to rotate, and a support assembly for supporting the kiln body. The axial direction of the kiln body is arranged on the inner wall of the kiln body, and the number of air duct burners is multiple, and the plurality of air duct burners are arranged on the side wall of the kiln inner air duct along the axial direction of the kiln inner air duct. The rotary kiln for direct reduction of iron-containing materials in this application can be used for direct reduction of iron-containing materials.

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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Patent Type & Authority Patents(China)
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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