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Double-layer sintering method and sintering device

A sintering method and technology of a sintering device, applied in the field of sintering, can solve problems such as poor sinter strength and insufficient sintering oxygen content, and achieve the effects of improving production capacity, improving homogeneity, and solving insufficient oxygen content

Active Publication Date: 2021-02-26
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The combination of double-layer material distribution technology and heat replenishment technology can solve the technical problems faced by double-layer sintering of ultra-thick material layers, effectively realize the homogeneity of sinter in the upper and lower layers of the material layer and improve the strength of sinter, and solve the problem of existing double-layer sintering. Insufficient sintering oxygen content in the lower layer of the process and poor sinter strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0061] According to a first embodiment of the present invention, a double layer sintering method is provided.

[0062] A kind of double-layer sintering method, this method comprises the following steps:

[0063] 1) Batching and primary mixing: batching iron-containing raw materials, flux and fuel, and preliminarily mixing the prepared materials to obtain a preliminary sintering mixture;

[0064] 2) Remixing: adding fuel to the sintered primary mixture for remixing to obtain a sintered remixed mixture;

[0065] 3) Ignite the primary fabric: Lay the base material L0 on the sintering trolley 1, lay the sintered remixed mixture on the base material to obtain the first fabric layer L1, and then perform primary ignition and sintering on the first fabric layer L1;

[0066] 4) Secondary fabric ignition: Lay sintered primary mixture on the first fabric layer L1 to obtain the second fabric layer L2, then perform secondary ignition and sintering on the second fabric layer L2, and provid...

Embodiment 1

[0089] Such as image 3 As shown, a double-layer sintering device includes a sintering trolley 1 . Along the running direction of the sintering trolley 1 , the device also includes a bottom bunker 2 , a primary distribution device 3 , a primary ignition device 4 , and a secondary distribution device 5 arranged sequentially above the sintering trolley 1 .

[0090] Wherein, the primary distribution device 3 is located downstream of the bottom bunker 2 , and the primary distribution device 3 includes a tertiary cylinder mixer 301 , a first belt conveyor 302 , a first shuttle distributor 303 , and a first mixing bin 304 . The first adhesive tape machine 302 is arranged below the discharge port of the tertiary cylinder mixer 301 . The first shuttle distributor 303 is arranged below the first tape machine 302 . The first mixing bin 304 is arranged below the first shuttle distributor 303 and above the sintering trolley 1 . The primary ignition device 4 is located downstream of the...

Embodiment 2

[0093] Repeat Example 1, except that the device further includes a primary cylinder mixer 8 , and the discharge port of the primary cylinder mixer 8 is connected to the feed port of the secondary cylinder mixer 501 .

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Abstract

The invention relates to a double-layer sintering method, which comprises the following steps: 1) proportioning an iron-containing raw material, a flux and a fuel, and preliminarily mixing the proportioned materials to obtain a sintered preliminary mixture; 2) adding fuel into the preliminary sintering mixture, and mixing again to obtain a sintered remixed mixture; 3) paving a bedding material ona sintering trolley, paving the sintered remixed mixture on the bedding material to obtain a first distribution layer, and then performing primary ignition sintering on the first distribution layer; and (4) paving the sintered preliminary mixture on the first distribution layer to obtain a second distribution layer, carrying out secondary ignition sintering on the second distribution layer, and providing an external heat source for heating and heat preservation of the second distribution layer. According to the double-layer sintering method and sintering device provided by the invention, the fuel is innovatively distributed in the material layer according to the mode that the upper layer content is low and the lower layer content is high, so that the oxygen amount consumed by the upper layer sintered mixture is reduced, it is guaranteed that the lower layer sintered mixture can obtain the sufficient oxygen amount, and the problems that according to an existing double-layer sintering process, the lower layer sintering oxygen content is insufficient, and the sintering ore strength is poor are solved.

Description

technical field [0001] The invention relates to a sintering production process, in particular to a double-layer sintering method and a sintering device, belonging to the technical field of sintering. Background technique [0002] In steel production, increasing the proportion of sinter used in blast furnaces is an important measure to reduce the cost of pig iron. In view of this, there are two main measures to directly increase the output of sintering ore. One is to enlarge the sintering machine and increase the effective sintering area, but the investment cost of equipment is high, which is only suitable for the transformation and upgrading of new sintering plants and old sintering plants; The other is to properly modify existing equipment and adopt thick (ultra-thick) material layer sintering technology, that is, to increase production by increasing the material layer thickness of the sintering machine, with small investment costs and significant effects. [0003] However...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/22
CPCC22B1/22
Inventor 胡兵叶恒棣刘呈谢志诚
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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