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A kind of pellet kiln shell particle used for sintering batching and preparation method thereof

A kiln skin and pellet technology, which is applied in the field of waste utilization of pelletized kiln skin, can solve problems such as low kiln skin strength, poor metallurgical performance, and adverse effects on smelting indicators, and achieve convenient processing, stable performance, and reduced production costs. Effect

Active Publication Date: 2022-03-22
SHANDONG TAISHAN STEEL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the pellet industry, due to the large powder content of the raw materials, they will melt under high temperature conditions and bond to the inner wall of the rotary kiln to form a kiln skin. The main component of the kiln skin is iron ore oxides. The strength of the skin is low and the metallurgical performance is poor. The current main treatment method is simple crushing and smelting with pellets, but it will have a negative impact on the smelting index. Since the kiln skin belongs to clinker and is a block material, The physical properties are similar to sintered ore, but directly used in sintering ingredients will not produce better results

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The pellet kiln skin particles used for sintering ingredients, including pellet kiln skin powder, is characterized in that: the particle size of the pellet kiln skin powder is ≤ 5mm, and it is ground into a powder form by agglomerated pellet kiln skin Preparation: Add 3% quicklime, 3% dolomite and appropriate amount of water to the pellet kiln skin powder, and stir to prepare pellet kiln skin particles with a particle size of 1-3 mm.

[0020] The above-mentioned method for preparing pellet kiln skin particles for sintering ingredients is characterized in that: it comprises the following steps to complete:

[0021] (1) Put the collected lumpy pellet kiln skin into a crusher and crush it so that the particle size is ≤15mm;

[0022] (2) Grinding the ore with a ball mill to make the particle size ≤ 5mm to obtain kiln skin powder;

[0023] (3) Put the kiln skin powder in a mixing bucket, add quicklime with 3% weight of the kiln skin powder, and stir for 5 minutes;

[0024]...

Embodiment 2

[0030] The pellet kiln skin particles used for sintering ingredients, including pellet kiln skin powder, is characterized in that: the particle size of the pellet kiln skin powder is ≤ 5mm, and it is ground into a powder form by agglomerated pellet kiln skin Preparation: Add 5% quicklime, 5% dolomite and appropriate amount of water to the pellet kiln skin powder, and stir to prepare pellet kiln skin particles with a particle size of 1-3 mm.

[0031] The above-mentioned method for preparing pellet kiln skin particles for sintering ingredients is characterized in that: it comprises the following steps to complete:

[0032] (1) Put the collected lumpy pellet kiln skin into a crusher and crush it so that the particle size is ≤15mm;

[0033] (2) Grinding the ore with a ball mill to make the particle size ≤ 5mm to obtain kiln skin powder;

[0034] (3) Put the kiln skin powder in a mixing bucket, add quicklime with 5% weight of the kiln skin powder, and stir for 10 minutes;

[0035...

Embodiment 3

[0041] The pellet kiln skin particles used for sintering ingredients, including pellet kiln skin powder, is characterized in that: the particle size of the pellet kiln skin powder is ≤ 5mm, and it is ground into a powder form by agglomerated pellet kiln skin Preparation: add 4% quicklime, 4% dolomite and appropriate amount of water to the pellet kiln skin powder, and stir to prepare pellet kiln skin particles with a particle size of 1-3 mm.

[0042] The above-mentioned method for preparing pellet kiln skin particles for sintering ingredients is characterized in that: it comprises the following steps to complete:

[0043] (1) Put the collected lumpy pellet kiln skin into a crusher and crush it so that the particle size is ≤15mm;

[0044] (2) Grinding the ore with a ball mill to make the particle size ≤ 5mm to obtain kiln skin powder;

[0045] (3) Put the kiln skin powder in the mixing bucket, add quicklime with 4% weight of the kiln skin powder, and stir for 8 minutes;

[004...

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Abstract

The invention discloses a pellet kiln skin granule used for sintering ingredients and a preparation method thereof, which is characterized in that it comprises the following steps: placing the collected lumpy pellet kiln skin in a crusher for crushing; using a ball mill to grind , to obtain kiln skin powder; put the kiln skin powder in a mixing bucket, add quicklime and stir; add dolomite and stir; add water and stir; pour out the material, and naturally accumulate it into a pile, let it stand; spray it with water to the natural The surface of the piled stockpile, and let it stand; the pellet kiln skin particles for sintering ingredients are obtained. When in use, the pelletized kiln shell particles prepared by the invention can be added to the original sintering ingredients. The invention has simple process and convenient treatment, realizes recycling of pellet kiln skin waste, reduces production cost, realizes industrialized continuous operation in the production process, and produces stable performance of sintered ore products.

Description

technical field [0001] The invention relates to a method for utilizing pellet kiln skin waste, in particular to a pellet kiln skin particle used for sintering ingredients and a preparation method thereof. Background technique [0002] The pelletizing industry is an important component of the metallurgical industry. Like the sintering industry, it provides raw materials for ironmaking. The pelletizing industry produces pellets, and sintering produces massive sinters. The two form blast furnace smelting through a certain ratio. raw materials. In the pellet industry, due to the large powder content of the raw materials, they will melt under high temperature conditions and bond to the inner wall of the rotary kiln to form a kiln skin. The main component of the kiln skin is iron ore oxides. The strength of the skin is low and the metallurgical performance is poor. The current main treatment method is simple crushing and smelting with pellets, but it will have a negative impact o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/248
CPCC22B1/248C22B1/2406Y02P10/20
Inventor 王永胜王学军郭会良刘荣张林才孟海燕谷璐璐
Owner SHANDONG TAISHAN STEEL GROUP