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Metallurgy sintering resource utilizing method for waste incineration fly ash, city sludge and steel and iron metallurgy dust removing ash

A technology for waste incineration fly ash and iron and steel metallurgy, which is applied in the field of waste resource utilization, and can solve the problems of sinter quality impact, deterioration of sinter gas permeability, and impact on sinter production technical indicators, etc.

Inactive Publication Date: 2018-05-25
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, iron and steel enterprises mostly use metallurgical dust directly into the sintering mixture. The disadvantages are: the dust particle size is fine, and it is easy to cause secondary pollution in the process of transportation, mixing and sintering; in the sintering process, it is relatively Fine dust with high water content will deteriorate the air permeability of sintering, affect the technical indicators of sintering production, and affect the quality of sintering ore

Method used

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  • Metallurgy sintering resource utilizing method for waste incineration fly ash, city sludge and steel and iron metallurgy dust removing ash
  • Metallurgy sintering resource utilizing method for waste incineration fly ash, city sludge and steel and iron metallurgy dust removing ash
  • Metallurgy sintering resource utilizing method for waste incineration fly ash, city sludge and steel and iron metallurgy dust removing ash

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Embodiment approach

[0101] According to the first embodiment provided by the present invention, a resource utilization method of waste incineration fly ash metallurgical sintering is provided.

[0102] A method for resource utilization of waste incineration fly ash metallurgical sintering, the method comprises the following steps:

[0103] (A1) Fly ash pretreatment step: Stir and mix the waste incineration fly ash and binder evenly to obtain a fly ash mixture;

[0104] (B1) batching step: mixing the obtained fly ash mixture with sintering raw materials to obtain primary sintering mixture, wherein the sintering raw materials include iron-containing raw materials for sintering, flux and fuel;

[0105] (C) Mixing and granulation step: the sintered mixture is mixed by the first mixer (that is, the first mixing) and the optional second mixer (that is, the second mixing) to obtain granular or pelletized sintered mixture. Homogenization;

[0106] (D) Sintering step: putting the sintered mixed material...

Embodiment 1

[0172] A method for resource utilization of waste incineration fly ash metallurgical sintering, the method comprises the following steps:

[0173] (A1) Fly ash pretreatment step: stirring and mixing the waste incineration fly ash and bentonite as a binder evenly to obtain a fly ash mixture; wherein: the mixing ratio of the waste incineration fly ash and the binder is 4:1 (weight Compare);

[0174] (B1) Dosing step: Mix 6 parts by weight of the obtained fly ash mixture with 194 parts by weight of sintering raw material to obtain a primary sintering mixture, wherein the sintering raw material includes 67wt% iron ore powder for sintering, 26wt% Flux (1:1 weight ratio of dolomite and limestone) and 7wt% anthracite coal powder; wherein: the amount of fly ash mixture is 3wt%, and the weight percentage is based on the total weight of the sintered ingredients;

[0175] (C) Mixing and granulating step: the sintered mixture is mixed by the first mixer (ie, first mixing) and second mixe...

Embodiment 2

[0179] Repeat embodiment 1, just this method also comprises:

[0180] (E) exhausting step: the smoke produced by sintering is sucked away by the exhaust fan through the bellows under the sintering machine trolley;

[0181] (F) Dust removal step: the exhaust fan passes the flue gas through the electrostatic precipitator to remove dust.

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Abstract

Provided is a metallurgy sintering resource utilizing method for waste incineration fly ash. The method includes the following steps of (A1) a fly ash pretreatment step, (B1), a burdening step, (C), auniform mixing and pelletizing step and (D) a sintering step, wherein in the (A1) step, the waste incineration fly ash and a binding agent are stirred and mixed uniformly, and a fly ash mixed material is obtained; in the (B1) step, the obtained fly ash mixed material and other raw materials are mixed, and are mixed uniformly, and a sintering mixed material is obtained; in the (C) step, after theprimary sintering mixed material is subject to first mixing and second mixing through a mixer, a sintering uniformly mixed material is obtained; and in the (D) step, the sintering uniformly mixed material is placed into a sintering machine trolley for sintering. According to the method, effective chemical components in the fly ash, city sludge and steel and iron metallurgy dust removing ash are utilized for metallurgy sintering to achieve resource utilizing.

Description

technical field [0001] The invention relates to the field of resource utilization of waste, in particular to a method for resource utilization of waste incineration fly ash, urban sludge and iron and steel metallurgy dust removal ash and metallurgical sintering. It mainly solves the environmental and social problems caused by improper disposal of waste incineration fly ash, urban sludge, and iron and steel metallurgy dust. Background technique [0002] Fly ash is an inevitable product of waste incineration, accounting for about 3-5% of the amount of waste incinerated. Fly ash is the fine particulate matter collected in the flue gas purification system, including the fly ash produced when the flue gas is treated with chemicals, accounting for about 10% to 20% of the ash. Fly ash is generally off-white or dark gray, with a particle size of less than 300 μm, most of which are 1.0 μm to 30 μm, a moisture content of 10% to 23%, a heat loss rate of 34% to 51%, and is prone to fro...

Claims

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Application Information

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IPC IPC(8): C22B7/02C22B7/00C22B1/16C22B1/242
CPCC22B1/16C22B1/242C22B7/00C22B7/02Y02P10/20
Inventor 叶恒棣周志安刘水石王菊香李康代友训
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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