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Ring formation control method through adding fine powder into rotary kiln oxidized pellets

A technology for oxidizing pellets and secret fine powder, which is applied in the field of iron and steel smelting, can solve the problems of rotary kiln ring formation and poor ball forming performance of secret fine powder, and achieve the effects of reduced fuel consumption, improved pellet performance, and stable control

Inactive Publication Date: 2016-05-25
BEIJING SHOUGANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention solves the technical problem of serious ring formation in the rotary kiln in the prior art by providing a method for controlling ring formation in the rotary kiln oxidized pellets mixed with secrete fine powder

Method used

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  • Ring formation control method through adding fine powder into rotary kiln oxidized pellets
  • Ring formation control method through adding fine powder into rotary kiln oxidized pellets
  • Ring formation control method through adding fine powder into rotary kiln oxidized pellets

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Embodiment Construction

[0023] In order to solve the technical problem of serious ring formation in the rotary kiln due to the poor ball forming performance of secreta fine powder in the prior art, the present invention provides a method for controlling ring formation in rotary kiln oxidation pellets mixed with secreta fine powder.

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] An embodiment of the present i...

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Abstract

The invention relates to the technical field of iron and steel smelting, in particular to a ring formation control method through adding fine powder into rotary kiln oxidized pellets. The ring formation control method includes: utilizing a high-pressure roller milling system to perform high-pressure roller milling on the fine powder, adding the fine powder after roller milling in the process of producing the rotary kiln oxidized pellets, wherein specific surface area of the fine powder after roller milling is greater than that of the fine powder before roller milling; according to a sequence from inside to outside, sequentially arranging four passages of a main gun burner of a rotary kiln to be a coal gas passage, an inner flow air passage, a coal powder passage and an outer flow air passage; increasing pressure of a burning fan of the main gun burner. By using the ring formation control method, pelleting performance of the fine powder can be improved, and probability of ring formation in the kiln can be lowered.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting, in particular to a method for controlling ring formation of rotary kiln oxidation pellets mixed with bismuth fine powder. Background technique [0002] Oxidized pellets have the characteristics of high iron grade, less harmful elements, uniform particle size composition, high cold strength, and good metallurgical properties. However, due to the restriction of high silicon characteristics of concentrate powder, the produced pellets have high silica content. , because the acidity of the pellets is too high, which restricts the further increase of the proportion of pellets used in the blast furnace, so that the production capacity of the pellets cannot be effectively utilized. [0003] Since mi fine powder belongs to magnetite powder, which has the characteristics of high grade, low silica content and fine particle size, it is very suitable as a raw material for pelletizing, so it ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/24
CPCC22B1/2406
Inventor 刘福来杨金保朱辛州张金华宋文武张卫东青格勒
Owner BEIJING SHOUGANG CO LTD
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