Solid waste, sintering and pelletizing co-treatment process capable of guaranteeing iron grade

A technology of co-processing and iron grade, which is applied in the field of co-processing of pellets, sintering, solid waste, and solid waste treatment technology, can solve the problem that the product quality, function and status of the sintering process and pelletizing process are not fully exerted, Can not adapt to the solid waste output of iron and steel plants, etc., to achieve the effect of improving the efficiency and effect of incineration and/or pyrolysis, uniform temperature distribution of the kiln body, and improving the effect of reduction treatment

Active Publication Date: 2021-07-16
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patent documents only involve a single solid waste disposal, and the types of solid waste to be disposed of are very limited, which cannot adapt to the complex solid waste output of steel plants. The role and status of sintering and pelletizing processes in solid waste disposal in steel plants have not been recognized. full play
[0007] In addition, in the treatment of solid waste in the existing technology, only the characteristics of the solid waste itself are considered, and the requirements for raw materials in the sintering process and the pelletizing process are not combined. Due to the large fluctuation of iron content in the solid waste, the treatment of the solid waste affects the sintering process. Process and pellet process original product quality

Method used

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  • Solid waste, sintering and pelletizing co-treatment process capable of guaranteeing iron grade
  • Solid waste, sintering and pelletizing co-treatment process capable of guaranteeing iron grade
  • Solid waste, sintering and pelletizing co-treatment process capable of guaranteeing iron grade

Examples

Experimental program
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Effect test

Embodiment 1

[0148] Such as figure 1 As shown, a co-processing process of solid waste, sintering, and pellets to ensure iron grade, the process includes the following steps:

[0149] (1) Solid waste: Classify the solid waste of iron and steel enterprises and urban municipal solid waste into organic solid waste, solid waste containing iron and high zinc, and solid waste containing iron and high salt.

[0150] (2) Solid waste pretreatment:

[0151] a) performing an incineration process on the organic solid waste to obtain incineration slag and performing a pyrolysis process on the organic solid waste to obtain pyrolysis slag.

[0152] b) The iron-containing high-zinc solid waste is subjected to a reduction dezincification process to obtain reduction slag and zinc-containing by-products.

[0153] c) The iron-containing high-salt solid waste is subjected to a water-eluting salt process to obtain brine and filter residue.

[0154] (3) Co-processing: Mix the incineration slag, pyrolysis slag...

Embodiment 2

[0157] Repeat Example 1, but mix the incineration slag, pyrolysis slag, reduction slag, and filter residue obtained in step (2) together with the pellet raw material, and then transport the mixed mixture to the pelletizing process. P 0 is 50 and M is 4.5.

Embodiment 3

[0159] Repeat Example 2, but control the incineration residue, pyrolysis residue, reduction residue, filter residue, sintering raw material, pelletizing The amount of raw materials added, so as to control the mass content P% of iron in the mixed mixture to meet P 0 % range required. Specifically:

[0160] where: m fs is the material mass of incineration slag, m rj is the material mass of pyrolysis slag, m hy is the mass of reducing slag, m lz is the material mass of filter residue, m yl is the material quality of sintered raw materials and pellet raw materials, P fs is the iron content in the incineration slag, P rj is the iron content in pyrolysis slag, P hy is the iron content in the reduction slag, P lz is the iron content in the filter residue, P yl is the content of iron in sintering raw materials and pellet raw materials.

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Abstract

The invention discloses a solid waste, sintering and pelletizing co-treatment process capable of guaranteeing the iron grade. The process comprises the following steps that the adding amount of incineration slag, pyrolysis slag, reducing slag, filter residues, sintering raw materials and pelletizing raw materials is controlled according to the respective iron content in the incineration slag, pyrolysis slag, reducing slag and filter residues obtained after solid waste pretreatment, the sintering raw materials and the pelletizing raw materials. Therefore, the mass content of iron in the mixed material is controlled to meet the production requirement of actual working conditions on the mass content of iron, cooperative treatment of various solid wastes is achieved, finally, full-process treatment of the various solid wastes is achieved, and the influence of the solid wastes on the environment and the risk of secondary pollution are thoroughly eliminated. Besides, the quality of sintered and/or pellet products is ensured.

Description

technical field [0001] The invention relates to a solid waste treatment process, in particular to a solid waste, sintering and pelletizing co-processing process for ensuring iron grade; it belongs to the technical field of organic solid waste co-sintering and pelletizing treatment. Background technique [0002] Solid waste is the waste material produced by people in normal production and life, and has lost its original use value. Due to the difficulty in site selection, high operating costs, and serious NIMBY effect of centralized disposal facilities for solid waste, especially hazardous waste, there is a serious gap in solid waste disposal capacity. At present, the large amount of solid waste stockpiled in my country has made it difficult to support the fragile environmental carrying capacity, and has become the main cause of "NIMBY" incidents. Realizing solid waste source reduction, resource utilization and harmless disposal has become an urgent and major livelihood deman...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/24C22B1/16C22B19/00
CPCC22B1/2406C22B1/16C22B19/00Y02P10/20
Inventor 叶恒棣王兆才魏进超李谦周浩宇沈维民
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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