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Sintering mixture preheating device and preheating sintering method

A technology of sintering mixture and preheating device is applied in the field of preheating device, sintering mixture preheating device and preheating and sintering to achieve the effects of smooth sintering, improving sintering quality and reducing sintering cost

Active Publication Date: 2022-03-01
红河钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve many problems existing in the preheating mode of the existing sintering mixture, the present invention provides a sintering mixture preheating device

Method used

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  • Sintering mixture preheating device and preheating sintering method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The method for preheating the sintered mixture based on the sintered mixture preheating device provided by the present invention comprises the following steps:

[0041] 1) Prepare materials according to the following mass ratios:

[0042] Limonite fines ore 20%

[0043] Magnetite Concentrate 60%

[0044] Limestone Powder 15%

[0045] Coke powder 5%;

[0046] 2) Stir and mix the materials prepared in step 1), and control the water content to 6% to obtain a sintered mixture;

[0047] 3) Spread the sintered mixture in step 2) on the walking trolley through the distributor, control the thickness of the cloth to 75cm, and make the uppermost horizontal preheating pipe section of the preheater extend into the sintering area 15cm away from the surface of the sintered mixture. In the mixture, the second horizontal preheating pipe section of the preheater extends into the sintering mixture 30 cm away from the sintering mixture surface, and the third horizontal preheating pipe...

Embodiment 2

[0052] The method for preheating the sintered mixture based on the sintered mixture preheating device provided by the present invention comprises the following steps:

[0053] 1) Prepare materials according to the following mass ratios:

[0054] Limonite fines ore 60%

[0055] Magnetite Concentrate 20%

[0056] Limestone powder 9%

[0057] Quicklime powder 7%

[0058] Anthracite powder 4%;

[0059] 2) Stir and mix the materials prepared in step 1), and control the water content to 9% to obtain a sintered mixture;

[0060]3) Spread the sintered mixture in step 2) on the walking trolley through the distribution device, control the thickness of the cloth to 70cm, and make the uppermost horizontal preheating pipe section of the preheater extend into the sintering area 20cm away from the surface of the sintered mixture. In the mixture, make the second row of horizontal preheating pipe section of the preheater extend into the sintering mixture 40cm away from the surface of the ...

Embodiment 3

[0065] The method for preheating the sintered mixture based on the sintered mixture preheating device provided by the present invention comprises the following steps:

[0066] 1) Prepare materials according to the following mass ratios:

[0067] Limonite fines ore 45%

[0068] Magnetite Concentrate 30%

[0069] Limestone powder 5%

[0070] Quicklime powder 7%

[0071] Dolomite powder 7%

[0072] Coke powder 3%

[0073] Anthracite powder 3%;

[0074] 2) Stir and mix the materials prepared in step 1), and control the water content to 7% to obtain a sintered mixture;

[0075] 3) Spread the sintered mixture in step 2) on the walking trolley through the distributor, control the thickness of the cloth to 72cm, and make the uppermost horizontal preheating pipe section of the preheater extend into the sintering area 18cm away from the surface of the sintered mixture. In the mixture, the second horizontal preheating pipe section of the preheater extends into the sintering mixtur...

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Abstract

The invention provides a sintering mixture preheating device and a preheating sintering method.The preheating device comprises a distributing device arranged above a walking trolley and is characterized in that a preheater is arranged at a feeding port of the walking trolley and comprises a box body, a cavity is formed in the box body, and an air inlet and an air outlet are formed in the box body; the air inlets are located in the top of the box body, the air outlets face the sintering mixture, the air outlets are arranged in multiple rows from top to bottom, each row is provided with multiple air outlets at intervals, each air outlet is connected with the corresponding horizontal preheating pipe section, and the outer end of each horizontal preheating pipe section extends into the sintering mixture on the walking trolley; the air inlet is connected with a steam pipe which is connected with a steam source. Through the multiple preheating pipe sections extending into the sintering mixture on the walking trolley, the sintering mixture on the walking trolley is continuously preheated, the temperature of the sintering mixture reaches 70 DEG C or above, sintering is smoother, the sintering quality is improved, heat loss is reduced to the maximum extent, and the sintering cost is reduced.

Description

technical field [0001] The invention relates to a preheating device, in particular to a sintering mixture preheating device and a preheating sintering method, belonging to the technical field of mechanical design and manufacture. Background technique [0002] Iron ore sintering is the process of mixing various powdery iron-containing raw materials with an appropriate amount of fuel and flux, adding an appropriate amount of water, and then sending them into a sintering machine to sinter into blocks. It is the first process of ironmaking production. In order to improve sintering quality and reduce fuel cost, it is necessary to preheat the mixture. Existing mixture preheating generally adopts quicklime digestion preheating, mixer steam preheating, mine tank steam preheating, etc. These methods have problems such as poor preheating effect, poor environment of the mixture tank platform, and easy sticking of the mine tank. . Therefore it is necessary to improve the prior art. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16C22B1/243
CPCC22B1/16C22B1/243Y02P10/25
Inventor 陈军移小义杨凯孙勇
Owner 红河钢铁有限公司
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