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Method for charging iron ore sintering fuel

A technology for iron ore and fuel, applied in the field of metallurgy, can solve the problems of poor strength, high energy consumption, low output and so on

Inactive Publication Date: 2009-09-16
PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of low output, poor strength and high energy consumption in ore sintering, the present invention provides a method for separately adding fuel for iron ore sintering, which includes the following steps: combining the material to be sintered with the first-time added The fuel is mixed in the primary mixer; the primary mixed material is mixed with the fuel added for the second time in the secondary mixer; the secondary mixed material is added to the sintering machine for sintering, wherein the fuel is primary A mixture of coke powder and secondary coke powder, or a mixture of primary anthracite and secondary coke powder, etc.

Method used

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  • Method for charging iron ore sintering fuel
  • Method for charging iron ore sintering fuel
  • Method for charging iron ore sintering fuel

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Embodiment 1

[0028] According to the method of adding fuel in the first embodiment of the present invention, coke powder, anthracite, and different fuel adding ratios were sintered to produce 5 batches of sintered ore, and the results are shown in Table 1 to Table 3. Among them, the raw materials and formula used are: by weight percentage, 40%-60% of vanadium-titanium magnetite concentrate, 1%-15% of imported fine ore, 1%-20% of ordinary high-grade fine ore, 1%-20% of ordinary medium-grade fine ore %-10%; flux: limestone 1%-15%, quicklime 1%-8%. Fuel: coke powder 4%-6% or anthracite 5%-8%. Sintering machine process parameters: mixed material moisture 6.5-7.5%, material layer 400-600mm, ignition temperature 950-1100°C, sintering negative pressure 11000-14500Pa, main exhaust gas temperature 90-130°C.

[0029] Table 1 The technical parameters of adding the fuel after the secondary parting close to the primary mixing

[0030]

[0031] Note: Batch number 1 in Table 1 is without fuel splittin...

Embodiment 2

[0038] According to the method of the second embodiment of the present invention, the fuel is added twice. The fuel is anthracite in the first addition, and the fuel in the second addition is coke powder. According to the method of the present invention, 6 batches of sinters are produced. The results are shown in Table 4.

[0039] Table 4 The implementation effect of adding the fuel in the secondary part and adding it close to the secondary mixer

[0040]

[0041] It can be seen from Table 4 that after the application of fuel secondary addition technology, the average output of different addition ratios has been increased by 4.2t / h, the increase rate is 2.59%, the solid fuel consumption has been reduced by 0.88kgce / t, and the strength of the drum has also increased A technical effect of 0.13%.

[0042] The method for separately adding fuel of the invention solves the problems of low sintering output, poor strength and high energy consumption of the vanadium-titanium magneti...

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Abstract

The invention discloses a method for charging iron ore sintering fuel which includes steps as follows: mixing sintering-waited material with a first adding fuel into a mixer for mixing; mixing the once mixed material with a second adding fuel into a second mixer for mixing; adding the twice mixed material into a sintering machine, wherein, the second adding fuel position locates on a random position after once mixing and before twice mixing, the fuel is a mixture of once coke powder and second coke powder, or once smokeless coal and twice coke powder. The method is suitable for all kinds iron ore sintering containing vanadium titano-magnetite.

Description

technical field [0001] The invention belongs to the field of metallurgy, and relates to an iron ore sinter fuel separation method. Background technique [0002] In order to enhance the smooth progress of the sintering process, it is necessary to increase the air permeability of the sintered material layer and improve the combustion conditions of the fuel, which is closely related to the fuel addition method. The traditional dosing method is that the solid fuel required for sintering (about 4%-8% by mass of the material to be sintered) is all added from the dosing chamber at one time. Vanadium-titanium magnetite concentrate belongs to refractory ore, TiO 2 High content, coarse particle size, poor granulation performance, resulting in difficult sintering of the ore, poor sintering air permeability, high sintering temperature, less liquid phase generated, insufficient sinter consolidation, poor sinter strength, low yield, and low output. In the past, the low utilization coeff...

Claims

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Application Information

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IPC IPC(8): C22B1/16
Inventor 蒋大均何木光谢俊勇杜斯宏林千谷石军
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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