A production method of super-thick material layer oxygen-enriched sintering

A production method and material layer technology, which is applied in the field of ultra-thick material layer oxygen-enriched sintering production, can solve problems such as insufficient oxygen supply and insufficient mineralization, and achieve the goals of reducing sintered solid fuel consumption, improving sinter quality, and sufficient combustion Effect

Active Publication Date: 2019-08-06
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a production method for oxygen-enriched sintering of an ultra-thick material layer, which solves the problem of insufficient oxygen supply and insufficient mineralization of the lower sintered material layer during sintering of a thick material layer; The problem that oxygen is not easy to enter the sintered material layer due to the melting and crusting of the material layer, realizes the sintering of an ultra-thick material layer with a thickness of more than 1 meter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The production method of super-thick material layer oxygen-enriched sintering comprises the following steps:

[0038] 1) The sintering raw materials and fuel are mixed and granulated to form sintering mixture A, and calcium permanganate solution is added during the first mixing and granulation, wherein 62% of the calcium permanganate solution is in Add in the first mixing, and add 38% calcium permanganate solution in the second mixing granulation; the weight percentage of the sintered mixture A with a particle size greater than 3mm is controlled at 72%, the moisture is controlled at 6.1%, and the alkalinity is controlled at 1.9; The calcium permanganate solution is prepared by completely dissolving calcium permanganate with 0.6% of the total mass of the sintering mixture A in water.

[0039] 2) The sintering raw material and fuel are mixed and granulated once to form sinter mixture B, and calcium permanganate solution is added during the first mixing and granulated, whe...

Embodiment 2

[0045] The production method of super-thick material layer oxygen-enriched sintering comprises the following steps:

[0046] 1) The sintering raw materials and fuel are mixed and granulated to form sintering mixture A, and potassium permanganate solution is added during the first mixing and granulation, wherein 78% of the mass of potassium permanganate solution is in Add in the first mixing, and add 32% potassium permanganate solution in the second mixing granulation; the weight percentage of the sintered mixture A with a particle size greater than 3mm is controlled at 78%, the moisture is controlled at 6.5%, and the alkalinity is controlled at 2.2; Potassium permanganate solution is prepared by completely dissolving potassium permanganate with 2.4% of the total mass of sintering mixture A in water.

[0047] 2) The sintering raw material and fuel are mixed and granulated once to form sintering mixture B, and potassium permanganate solution is added during the first mixing and ...

Embodiment 3

[0053] The production method of super-thick material layer oxygen-enriched sintering comprises the following steps:

[0054] 1) The sintering raw materials and fuel are mixed and granulated once to form sintering mixture A. Calcium manganate solution is added during the first mixing and granulating, and 65% of the calcium manganate solution is mixed in the first mixing. Add evenly, 35% of the mass of calcium manganate solution is added during secondary mixing granulation; the weight percentage of the sintered mixture A with a particle size greater than 3mm is controlled at 75%, the moisture is controlled at 6.3%, and the alkalinity is controlled at 2.0; calcium manganate The solution is prepared by completely dissolving calcium manganate with 1.5% of the total mass of the sintering mixture A in water.

[0055] 2) The sintering raw materials and fuel are mixed and granulated once to form sintering mixture B, and calcium manganate solution is added during the first mixing and gr...

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Abstract

The invention relates to an ultra-thick material layer oxygen-enriched sintering production method. The method comprises the steps that two times of material distribution and two-time ignition is carried out, an upper-layer sintering mixture and a lower-layer sintering mixture are correspondingly provided with an oxygen generator, the sintering raw material and the fuel are subjected to primary uniform mixing and secondary mixing granulation to prepare a sintered mixture A, and an oxygen preparation agent solution is additionally added during the primary uniform mixing and the secondary mixinggranulation; the sintering raw material and the fuel are subjected to the primary uniform mixing and the secondary mixing granulation to prepare a sintered mixture B, and the oxygen preparation agentsolution is additionally added during the primary uniform mixing and the secondary mixing granulation; the sintering mixture A is added to a sintering trolley through a first distributor on the machine head of the sintering machine; the oxygen preparation agent solution in the sintering material in the lower direction of the first distributor is sprayed; and the sintering mixed material B is added to the surface of sintered ore, and an oxygen preparation agent solution is sprayed on the sintering material surface. The method has the advantages that oxygen is generated by high-temperature decomposition of the oxygen generator, and the oxygen is uniformly enriched at different parts of the sintered material layer; and the strength of the sintered ore is improved, and the fuel consumption ofthe sintered solid is reduced.

Description

technical field [0001] The invention belongs to the technical field of ironmaking and sintering, and in particular relates to a production method for super-thick material layer oxygen-enriched sintering. Background technique [0002] The sintering production process is that the mixed material cloth is added to the trolley, sintered from the surface to the inside from top to bottom through ventilation and ignition, and a violent gas-solid-liquid multiphase reaction occurs, and the liquid is assimilated and the bonding phase is formed. , crystallization and recrystallization of minerals, phase transition and crystal form transition, and finally cooling and condensing into sintered ore with different structural characteristics. The amount of oxygen pumped in from top to bottom directly affects the vertical sintering speed, which in turn affects the running speed of the sintering machine, sinter quality and production efficiency. [0003] Thick bed sintering is a widely used si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/16
CPCC22B1/16
Inventor 张辉夏铁玉周明顺刘帅李冰翟立委刘杰徐礼兵孙雷
Owner ANGANG STEEL CO LTD
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