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Preparation method for granulating fine-particle fuel for sintering of iron ore in advance

A technology of fine particles and iron ore, which is applied in the field of pre-granulation of iron ore sintered fine particle fuel, can solve the problems of large impact of sintering, achieve the effect of improving strength, reducing return rate and solid fuel consumption

Inactive Publication Date: 2015-01-28
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As mentioned before, the part of fuel <0.5mm has a great influence on sintering, and there is currently no reasonable way to eliminate it

Method used

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  • Preparation method for granulating fine-particle fuel for sintering of iron ore in advance

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preparation example Construction

[0024] In order to solve the technical problem of excessive content of fine particles with a particle size of <0.5mm in the fine particle fuel in the prior art, the present invention provides a method that can effectively reduce the particle size of <0.5mm in the sintered fuel. Preparation method of fine particle fuel pre-granulation of sintered iron ore with fine particle content. The preparation method comprises the following steps,

[0025] a. Particulate fuel collection, use a sieve with a classification point of 0.5mm to sieve the crushed fuel, and collect the fuel whose particle size is not greater than 0.5mm under the sieve to obtain particulate fuel;

[0026] b, batching, adding a binder with a mass ratio of 0.5%-2% to the particulate fuel collected in step a, and spraying water to evenly stir to form a mixture of binder and particulate fuel;

[0027] c. To prepare fine particle fuel, feed the mixture prepared in step b into a fine particle material feeder to prefabri...

Embodiment 1

[0032] The detailed content and specific implementation of the present invention will be described below with respect to an embodiment.

[0033] In the present invention, the fuel with a granularity of <0.5mm in the fuel is called fine particle fuel. According to the actual needs of different iron ore sintering production, the fuel with particle size of <1.0mm or <0.25mm can also be called fine particle fuel, which cannot be generalized, and the present invention only provides a preparation method.

[0034] The basic production process is:

[0035]1. Pre-granulate the 0.5mm granulated pellets. Part of the fuel is mixed and transferred to the sintering batching room, which reduces the negative impact of <0.5mm fuel on the sintering process and the output of sintered ore products.

[0036] 2. In the fuel crushing process, add a screening link before crushing, the purpose is to screen out the <3mm part of the fuel, so as to reduce the load of the crusher, improve the efficiency...

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Abstract

The invention discloses a preparation method for granulating a fine-particle fuel for sintering of iron ore in advance and belongs to the technical field of preparation of a fuel for metallurgical production. By adoption of the preparation method, the content of micro-fine particle materials with the granularity being less than 0.5mm in the fuel for sintering of the iron ore can be effectively reduced. The preparation method comprises the following steps of: firstly sieving crushed fuel by adopting a sieving tool with the grading point being 0.5mm, collecting sieved fuel with the particle size being not more than 0.5mm to obtain the micro-particle fuel; then adding a binding agent with the mass ratio being 0.5%-2% into the micro-particle fuel collected in the step a, spraying water, and uniformly stirring to obtain a mixture of the binding agent and the micro-particle fuel; and then feeding the mixture prepared in the step b into a fine-particle making machine and preparing into fine-particle fuel with the particle size being not less than 0.5mm in advance so as to finish the preparation work of granulating the disposable micro-particle fuel into balls in advance.

Description

technical field [0001] The invention relates to a preparation method, in particular to a preparation method for pre-granulating iron ore sintered fine particle fuel, which belongs to the technical field of fuel preparation for metallurgical production. Background technique [0002] The particle size of the solid fuel used in sintering is related to the characteristics of each component in the mixture, and can generally be determined by experiments and production practices. When fuel particles with a particle size of <0.5mm are burned, it is impossible to build a block of sinter around itself. When sintering iron ore powder with a particle size of <8mm, according to the test and actual production, the coke powder with a particle size of 1-2mm is the most suitable, and such a particle size has the ability to build a 18-20mm sinter block with a relatively high strength around it. block system. [0003] When the sintered concentrate has a particle size <1mm, and the p...

Claims

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Application Information

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IPC IPC(8): C22B1/242
CPCC22B1/242
Inventor 蒋大均杜斯宏何木光宋剑谷俊
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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