Method for reducing sintered solid fuel consumption

A technology of solid fuel and fuel consumption, applied in the field of sintering process in the metallurgical industry, can solve the problems of high control difficulty and cost, poor fuel consumption reduction effect, and reduced quality of sintered ore, so as to improve the quality of sintered ore, low cost, fuel The effect of reducing consumption

Active Publication Date: 2016-02-03
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods have played a role in reducing the consumption of sintered solid fuel to a certain extent, some methods have the problems of difficult control and high cost, and some have problems such as the decline in the quality of sinter ore and the poor effect of reducing fuel consumption.

Method used

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  • Method for reducing sintered solid fuel consumption
  • Method for reducing sintered solid fuel consumption
  • Method for reducing sintered solid fuel consumption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1 and embodiment 3 adopt the method of this three times mixing. Embodiment 1 is to sieve into three particle fractions greater than 2mm, 0.5-2mm, and less than 0.5mm. Embodiment 3 is sieved into three particle fractions greater than 3mm, 0.5-3mm and less than 0.5mm.

[0044] see figure 2 , another technical scheme of the method for reducing the fuel consumption of sintered solids in the present invention, which comprises the following steps:

[0045] 1) Sieve the solid fuel for sintering into three grades larger than 2.0-3.0mm, 0.5-3.0mm and smaller than 0.5-1.0mm with 2-3mm and 0.5-1.0mm sieves, and put them into three fuel silos respectively ;

[0046] 2) Batching solid fuel with particle size of less than 0.5-1.0mm and sintering raw materials such as iron ore, flux, return ore and other dust, and adding them to a primary mixer for mixing;

[0047] 3) Transport the mixture mixed by the primary mixer and the solid fuel of 0.5-3.0mm particle size to the ...

Embodiment 2

[0049] Embodiment 2 and 4 adopt figure 2 secondary mixing method. Example 2 is sieved into fractions greater than 2mm, 1-2mm and less than 1mm. Example 4 is sieved into fractions greater than 3mm, 1-3mm and less than 1mm.

[0050] The control example adopts three-stage mixing, but without particle size sieving.

[0051] The parameter setting of embodiment is as shown in table 1:

[0052] Table 1 embodiment parameter setting

[0053]

[0054]

[0055] Table 2 Implementation Results

[0056]

[0057] See Table 2 according to the implementation results of the embodiment parameters listed in Table 1. Using the scheme of Example 1, compared with the control example, the yield is increased by 2.37%, the utilization factor is increased by 11.94%, the drum index is increased by 1.5%, and the solid fuel consumption is reduced by 5.48%. Adopting the scheme of Example 4, compared with the comparative example, the utilization coefficient is increased by 4.48%, the yield an...

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Abstract

The invention discloses a method for reducing solid fuel consumption. The method comprises the following steps: 1) a solid fuel for sintering is screened to three particle grades of 2.0-3.0 mm, 0.5-3.0 mm and less than 0.5-1.0 mm; 2) the solid fuel with the particle grade of less than 0.5-1.0 mm is mixed with such sintered raw materials as iron ore, flux, return mines and other dust; and the above materials are added in a primary mixing machine for mixing; 3) the mixture and the solid fuel with the particle size of 0.5-3.0 mm are conveyed to a secondary mixing machine for mixed pelletization; and 4) the obtained mixture and the solid fuel with the particle size of 2.0-3.0 mm are input to a tertiary mixing machine, and are mixed and conveyed to a sintering machine for distribution, ignition and sintering. The method can improve the combustion speed and efficiency of the solid fuel, improves the pelletization effect of the sintered mixture, improves the material layer permeability in the sintering process, improves the sintered mineral product quality, and reduces the environmental pollution.

Description

technical field [0001] The invention relates to a sintering process in the metallurgical industry, in particular to a method for reducing the fuel consumption of sintered solids. Background technique [0002] The sintering process is the second largest energy consumer in the steel production process, accounting for about 12% of the total energy consumption in steel production, of which about 80% is consumed by solid fuels that provide heat during the iron ore sintering process. Solid fuel combustion not only produces a large amount of greenhouse gases, but also produces environmental pollutants such as SO 2 , NO x and dioxins etc. Therefore, in order to reduce the energy consumption of the sintering process, improve its pollution to the environment, and meet the requirements of environmental protection, it is necessary to find a method that can effectively reduce the consumption of solid fuels in sintering. [0003] In the current sintering process, solid fuel and iron-co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
Inventor 熊林毛晓明沈红标齐伟李建赵晓岩
Owner BAOSHAN IRON & STEEL CO LTD
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