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Device and method for detecting quantitative relation of interaction action of molten iron sulfide in furnace cylinder

A technology of interaction and quantitative relationship, applied in the field of blast furnace ironmaking, can solve the problem of not obtaining the quantitative relationship of the interaction of molten iron, sulfur and titanium, and achieve the effect of scientific and reasonable method and prolonging the life of the hearth.

Inactive Publication Date: 2019-08-16
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Application Information

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Problems solved by technology

In the existing literature, it is all about the influence of sulfur and titanium on the action of molten iron and carbon bricks, and most of them are analyzed from the perspective of metallurgical thermodynamics and metallurgical kinetics, and the quantitative relationship between sulfur and titanium in molten iron has not been obtained.

Method used

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  • Device and method for detecting quantitative relation of interaction action of molten iron sulfide in furnace cylinder
  • Device and method for detecting quantitative relation of interaction action of molten iron sulfide in furnace cylinder
  • Device and method for detecting quantitative relation of interaction action of molten iron sulfide in furnace cylinder

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Embodiment 1

[0068] (1) Select hearth molten iron samples with known composition in different periods of a specific blast furnace. Select the molten iron sample between [S]=0.02~0.08%, and select the molten iron sample between [Ti]=0.05~0.15% when [S] is relatively fixed. Each sample 200g, the composition of the selected molten iron sample is as shown in Table 1:

[0069] Table 1 Composition of hearth molten iron samples

[0070]

[0071]

[0072] (2) Cut the hearth carbon brick into a cylindrical rod sample of Φ12×50mm with a special drill. Before the experiment started, the carbon brick cylindrical rod sample and the corundum rod were bonded together to form a stirring rod (such as figure 2 shown). The specific process is: 1) Use 302 glue to stick the carbon brick cylindrical rod sample and the corundum rod, and dry it; 2) Mix the high-temperature binder and fiber powder to a paste; 3) Put a layer of paste binder The first layer is coated on the junction of the carbon brick cy...

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Abstract

The invention provides a device and a method for detecting the quantitative relation of the interaction action of molten iron sulfide in a furnace cylinder, and relates to the technical field of blastfurnace ironmaking. The device comprises a high-temperature tubular furnace, a corundum crucible, a stirring rod and a motor; the stirring rod consists of a corundum rod and a carbon brick cylindrical rod connected to one end of the corundum rod; the other end of the corundum rod is connected with the motor; and during application, the corundum crucible is placed in a constant-temperature zone ofthe high-temperature tubular furnace, and the carbon brick cylindrical rod end of the stirring rod enters from an upper opening of the high-temperature tubular furnace and is used for stirring a molten iron sample in the corundum crucible. The device is standard in design and high in detection result reliability, and the device can be used for detecting the molten iron samples by aiming at different blast furnaces, the quantitative relation of a furnace cylinder molten iron sulfur-titanium interaction effect conforming to the actual conditions of different blast furnaces is obtained, the molten iron component is regulated and controlled, and reasonable suggestions are provided for prolonging the service life of the furnace cylinder.

Description

technical field [0001] The invention relates to the technical field of blast furnace ironmaking, in particular to a device and method for detecting the quantitative relationship of sulfur-titanium interaction in hearth molten iron. Background technique [0002] Molten iron is the final product of blast furnace ironmaking. The composition of molten iron is the guarantee of the quality of molten iron and the prerequisite for smelting high-quality steel. In recent years, with the change of smelting conditions and furnace conditions, the composition of molten iron in the hearth has changed. On the one hand, with the development of molten iron pretreatment technology, good thermodynamic and kinetic conditions for desulfurization outside the furnace can remove sulfur from molten iron to less than 0.01% in a short time. And from the perspective of cost, it is the most economical to combine hot metal pretreatment with blast furnace process for desulfurization. Therefore, domestic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/24
CPCC21B7/24
Inventor 邓勇刘然张淑会刘小杰郄亚娜
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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