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Method for determining content of pulverized coal, coke and iron-containing charge in blast furnace dust

A determination method and blast furnace technology are used in the determination of blast furnace dust composition and the determination of the content of pulverized coal, coke and iron-containing charge in blast furnace dust, and can solve the problem of large error in results, complicated operation, and inability to accurately reflect the composition. situation and other problems, to achieve the effect of high accuracy and high test accuracy

Active Publication Date: 2010-12-29
BAOSHAN IRON & STEEL CO LTD +1
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Problems solved by technology

However, this method is cumbersome to operate, the error of the result is large, and it cannot accurately reflect the composition of blast furnace dust, coal and coke.

Method used

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  • Method for determining content of pulverized coal, coke and iron-containing charge in blast furnace dust
  • Method for determining content of pulverized coal, coke and iron-containing charge in blast furnace dust
  • Method for determining content of pulverized coal, coke and iron-containing charge in blast furnace dust

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Embodiment

[0027] Sampling of primary furnace dust, secondary furnace dust and coke, coal powder, sintered ore, pellets, lump ore, etc. in the blast furnace production site, dried and ground to a particle size of <0.125mm, and measured the true value of each raw material and fuel Density, the results are shown in Table 1:

[0028] Table 1 True density of raw material and fuel

[0029]

[0030] According to the difference in the true density of coal, coke and ironmaking raw materials, the density is 1.60g / cm 3 Zinc chloride ZnCl 2 The solution is the separation medium to separate the coal dust from the furnace dust. The centrifuge speed is 8000rpm, the centrifuge tube volume is 50ml, and the centrifugation time is 30min. The liquid level of the separation medium is 85% of the centrifuge tube height. The furnace dust in each centrifuge tube The ratio of the mass to the volume of the separation medium is 1:8, and the separation time is 30 minutes. After centrifugation, carefully pour out the up...

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Abstract

The invention discloses a method for determining the content of pulverized coal, coke and iron-containing charge in blast furnace dust, which comprises the following steps: 1) determining the true density of materials; 2) preparing a separating medium; 3) carrying out centrifugal separation on the furnace dust; 4) measuring and calculating the weight percentage content of settled coal and settledcoke; 5) calculating the weight percentage content of coal and coke in the furnace dust; and 6) measuring and calculating the composition of the iron-containing charge in the furnace dust. Compared with the prior art, the method has the following advantages and positive effects: the creativity is novel, the method adopts the physical separation method of centrifugal sedimentation to measure and calculate the content of the coal, the coke and the iron-containing charge in the blast furnace dust by utilizing the properties that the particle size ranges of the components are close, but the true densities of the components are greatly different; and the operation is simple, the test accuracy is high, the determination method is less affected by human factors, and the accuracy of the method ishigher than that of the coal rock microscopic analysis method.

Description

Technical field [0001] The invention relates to blast furnace ironmaking, in particular to a method for measuring the composition of blast furnace dust, in particular to a method for measuring the content of coal powder, coke and iron-containing charge in blast furnace dust. Background technique [0002] Blast furnace dust is the dust that overflows with the gas flow in the blast furnace ironmaking process, mainly composed of cracked coke powder, unburned coal powder injected into the furnace and iron-containing charge (sintered ore, pellets, natural lump ore) The composition of particles produced during the collapse. Furnace dust is divided into primary furnace dust and secondary furnace dust. Primary furnace dust is the product of gravity dust removal and has larger particles; secondary furnace dust is the product of dust removal by washing method or bag method with finer particle size. [0003] The increase in the amount of furnace dust blowing not only reduces the utilization ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/22G01N9/00G01N1/28
Inventor 张永忠刘晓荣杨俊和
Owner BAOSHAN IRON & STEEL CO LTD
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