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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Problems solved by technology

As mentioned before, the part of fuel <0.5mm has a great influence o

Method used

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

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

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

[0026] b. Ingredients: add 0.5%-2% of the binder by mass to the particulate fuel collected in step a, and spray water to uniformly stir to form a mixture of binder and particulate fuel;

[0027] c. Prepare fine particle fuel, and send the mixture prepared in step b to the ...

Example Embodiment

[0031] Example one

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

[0033] The invention combines the fuel Fuel with a particle size of <0.5mm is called fine fuel. According to the actual needs of different iron ore sintering production, it can also be <1.0mm or Fuels with a particle size of <0.25 mm are called fine-grained fuels and cannot be generalized. The present invention only provides a preparation method.

[0034] The basic production process is:

[0035] 1. In the fuel 0.5mm pellets, in comparison with other> The 0.5mm part of the fuel is mixed and transported to the sintering batching chamber, which reduces <0.5mm fuel has an adverse effect on the sintering process and the quality of sintered mineral products.

[0036] 2. In the fuel crushing process, a screening link is added before crushing, the purpose is to screen out the fuel <3mm part, in order to reduce the load of the crusher, ...

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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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