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A Diagnosis Method of Core Stacking in Large Blast Furnace

A diagnostic method and a blast furnace technology, which are applied in the field of blast furnace ironmaking, can solve the problems of lack of versatility, the operator's furnace condition diagnosis and the limited effect of furnace condition adjustment, and achieve the effect of less influence of furnace conditions.

Active Publication Date: 2020-07-24
INST OF RES OF IRON & STEEL JIANGSU PROVINCE +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These indexes focus on academic research, are applicable to a specific case, lack universality, and are of limited use to operators in diagnosing and adjusting furnace conditions

Method used

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  • A Diagnosis Method of Core Stacking in Large Blast Furnace
  • A Diagnosis Method of Core Stacking in Large Blast Furnace
  • A Diagnosis Method of Core Stacking in Large Blast Furnace

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Embodiment Construction

[0039] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the present invention, a certain large-scale blast furnace is taken as an example. When the furnace condition is stable, the average daily output is 13,200 tons / day, and the fuel ratio is 515kg / t; keep climbing. During this process, the blast furnace continued to run forward, and the air volume and blast function could maintain normal. There were no frequent material collapses and top pressure peaks, and there was no particularly difficult situation in slag and iron removal. It was just that the fuel was relatively high, and the cross The temperature of the temperature measurement center is high and wide, and the temperature of the bottom and side walls of the furnace has dropped in an all-round way.

[0040] In view of the above situation, adopt the present invention to judge whether the above-mentioned abnormality is caused by the stack...

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Abstract

The invention discloses a diagnostic method for large-scale blast furnace core stacking. The diagnostic method comprises the steps that a heat loss model based on a full blast furnace and a hearth silicon reaction kinetic model are established, and the temperature of a cross temperature measuring center and a sub-center and a furnace core temperature are measured; and according to the blast furnace ton iron heat loss delta Q and a change trend, the silicon strength R<Si> and a change trend, the blast furnace core temperature and a change trend and the temperature changes of the cross temperature measuring center and the sub-center, whether blast furnace cores are stacked or not is determined. An operator can immediately diagnose whether the blast furnace cores are stacked or not and respond quickly, and a furnace core stacking treatment method without retreating ore batches and without adding a furnace washing agent is provided. The diagnostic method comprehensively considers the blastfurnace conditions and the basic principle of iron making, and judges whether the furnace cores are stacked or not according to the common characteristics of furnace core stacking, and universality is achieved.

Description

technical field [0001] The invention belongs to the technical field of blast furnace ironmaking production, and in particular relates to a method for diagnosing piles of large-scale blast furnace cores. Background technique [0002] Large-scale blast furnaces have high requirements on the quality of raw materials and fuels, the air flow is difficult to control, the diameter of the hearth is large, and the dead material column is not active, which is easy to cause accumulation in the furnace core. Many domestic blast furnaces have encountered the problem of furnace core accumulation, especially large-scale blast furnaces, but the manifestations of each blast furnace are different. Most of the blast furnaces show that the center temperature of the cross temperature measuring gun is low, the ability to receive wind is poor, and the kinetic energy of the blast is low. Insufficient, the furnace core temperature drops while the side wall temperature rises, but there are also some ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/24G06F30/20
CPCC21B7/24G06F30/20G06F2119/08
Inventor 赵华涛杜屏卢瑜朱华
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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