Method for evaluating material distribution uniformity of bell-less blast furnace

A technology of uniformity and distribution, which is applied in the field of evaluating the uniformity of distribution of bellless blast furnaces, and can solve problems such as the lack of further theoretical understanding of production indicators

Inactive Publication Date: 2012-10-31
BAOSHAN IRON & STEEL CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

There have been many studies on the blast furnace material flow movement model, material level model and ore-coke ratio model. However, there is no further theory on the effect of different charge distribution forms on smelting, or the relationship with production indicators. know

Method used

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  • Method for evaluating material distribution uniformity of bell-less blast furnace
  • Method for evaluating material distribution uniformity of bell-less blast furnace
  • Method for evaluating material distribution uniformity of bell-less blast furnace

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Experimental program
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Embodiment

[0043] 1. The distribution uniformity index IBH under different ore-coke ratios

[0044]With a step size of 0.10, simultaneously adjust the ore-coke ratio in the central area and the edge area to increase it from 1.50 to 2.50, and at the same time reduce the ore-coke ratio in the middle area from 2.75 to 1.63. During the adjustment process, the total ore-coke ratio of the column is always guaranteed is 2.00. In this process, the distribution uniformity index of the material column is calculated. The data are summarized in Table 1. It can be seen from the table that with the increase of the ore-coke ratio in the central area and the edge area, and the decrease of the ore-coke ratio in the middle area, The distribution uniformity index IBH increases first and then decreases, and the variation range of the distribution uniformity index IBH tends to be larger at both ends of the curve, while the variation range is smaller in the vicinity of the three areas where the mineral-coke ra...

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Abstract

The invention relates to a method for evaluating material distribution uniformity of a bell-less blast furnace. The method includes the steps: 1), partitioning the horizontal section of a block strip column of the blast furnace into a fringe region, an intermediate region and a central region; 2), using the parallel circuit analogical method to analogically take the three regions of the block strip column as a parallel circuit with three parallel branches; and 3) referring to calculation modes of parallel resistors to calculate distribution uniformity index IBH taking ore-coke ratio as content. Material column modes at different furnace material distribution conditions are extracted by means of partitioning the block strip column, a specific calculation formula for calculation of the distribution uniformity index is provided to indicate material column resistance characteristics and furnace material distribution characteristics, block strip air permeability is further indicated through the material column resistance characteristics, and the relation between the distribution uniformity index indicating the furnace material distribution characteristics and gas utilization rate is analyzed.

Description

technical field [0001] The invention relates to a method for evaluating the uniformity of material distribution in a bellless blast furnace, by which the resistance characteristics of material columns in different modes can be evaluated, and the gas utilization rate of the blast furnace under the material columns in different modes can be reflected. Background technique [0002] Blast furnace operation achieves the established smelting effect through reasonable comprehensive adjustment measures of the upper and lower parts. Generally speaking, most blast furnaces will take the operation of the lower part as the basis, and at the same time take into account the upper part of the distribution operation to implement a reasonable mix of upper and lower parts. When the operation of the lower part of the blast furnace changes, the upper part will also take appropriate measures to match it to maintain the blast furnace. Stable and straight, and even improve the smelting effect; in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/24C21B7/18C21B5/00
Inventor 姜伟忠陈永明陶卫忠王俊付长亮刘成松徐健
Owner BAOSHAN IRON & STEEL CO LTD
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