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Method for determining ore batches and furnace top pressure according to blast furnace bosh gas volume indexes

A technology of furnace top pressure and blast furnace bosh, which is applied to blast furnaces, blast furnace details, furnaces, etc., can solve problems that cannot directly reflect the blast furnace smelting process, and achieve the goal of promoting technical and economic indicators, promoting smooth production, and promoting improvement Effect

Active Publication Date: 2017-09-01
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Blast furnace smelting production has the characteristics of a "black box". Although a large number of detection couples and furnace body pressure measuring points are installed on the furnace body, none of them can directly reflect the smelting process in the blast furnace

Method used

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  • Method for determining ore batches and furnace top pressure according to blast furnace bosh gas volume indexes
  • Method for determining ore batches and furnace top pressure according to blast furnace bosh gas volume indexes
  • Method for determining ore batches and furnace top pressure according to blast furnace bosh gas volume indexes

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Embodiment Construction

[0022] According to the statistics of production practice data, a blast furnace is 8300~10500m 3 / min bosh gas volume, see the table below for different ore batches and furnace top pressures.

[0023]

[0024] In a blast furnace bosh gas volume index by 52m 3 / (min.m 2 ) continuously to 67m 3 / (min.m 2 ), the ore batch and furnace top pressure are positively correlated with the bosh gas volume index. According to the difference of the bosh gas volume index, the ore batch is gradually increased from 120t to 136t, and the furnace top pressure is also gradually increased from 220Kpa to 260KPa. And the regression obtains the following 2 formulas:

[0025] Mine batch=-46.71+2.65*bosh gas volume index+5~15, the unit is t;

[0026] Furnace top pressure = 12.73+3.69*bosh gas volume index+15~30, the unit is KPa;

[0027] 3500~5000m 3 The upper limit value for large-scale blast furnace is 1500~3500m 3 Level small blast furnace removes the limit.

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Abstract

The invention provides a method for determining ore batches and furnace top pressure according to blast furnace bosh gas volume indexes, and belongs to the field of blast furnace ironmaking safe operation. The method is characterized in that the ore batches are equal to the sum of -46.71, the product of 2.65 and the bosh gas volume indexes, and a number ranging from 5 to 15, wherein the unit is t; the furnace top pressure is equal to the sum of 12.73, the product of 3.69 and the bosh gas volume indexes, and a number ranging from 15 to 30, wherein the unit is KPa; and for large blast furnaces of the grade ranging from 3500 m<3> to 5000 m<3>, upper limit values are taken, and for small blast furnaces of the grade ranging from 1500 m<3> to 3500 m<3>, lower limit values are taken. By means of the method, positioning of the ore batches and the furnace top pressure under the different bosh gas volume indexes in the normal production process of the blast furnaces is accurate; and the way of increasing the ore batches and the furnace top pressure, decreasing fuel ratios and controlling the bosh gas volume indexes within a certain range is the main way for achieving high-utilization-coefficient production.

Description

technical field [0001] The invention belongs to the technical fields of blast furnace ironmaking and blast furnace bosh gas volume index. Background technique [0002] With the development of China's iron and steel industry, the economic benefits and strong competitiveness brought by large-scale blast furnaces have become increasingly prominent. It is particularly important to conduct basic research on the production operation of large-scale blast furnaces. The reasonable control of the bosh gas volume index is one of them. The bosh gas volume index is defined as the bosh gas volume passing through the unit hearth area. From the perspective of gas dynamics, it is an important parameter to measure the degree of intensified smelting of the blast furnace. [0003] Analysis of the blast furnace bosh gas volume index from a low of 52m 3 / (min.m 2 ) gradually increased to a high level of 67m 3 / (min.m 2 ), the characteristics of different furnace conditions during production,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
CPCC21B5/006
Inventor 唐顺兵李夯为巩黎伟杨志荣张智郑伟阮根基
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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