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Method for evaluating influence of volatilization of slag containing volatile components on viscosity

An evaluation method and slag technology, applied in the field of metallurgical engineering, can solve problems such as inaccurate viscosity measurement

Pending Publication Date: 2022-03-04
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for evaluating the influence of volatilization of slag containing volatile components on viscosity, so as to solve the technical problem of inaccurate viscosity measurement caused by the use of slag containing volatile components in the pyrometallurgical process, so as to obtain more accurate viscosity value, providing support for the control and optimization of pyrometallurgical processes involving slag containing volatile components

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  • Method for evaluating influence of volatilization of slag containing volatile components on viscosity
  • Method for evaluating influence of volatilization of slag containing volatile components on viscosity

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Embodiment approach

[0049] A method for evaluating the influence of volatilization of slag containing volatile components on viscosity in the present invention, comprising:

[0050] Taking the relevant measurement data of fluorine-containing slag for steelmaking as an example for illustration, where fluoride is a volatile component, the implementation of other volatile slags is similar.

[0051] Determination method and data extraction: Viscosity measurement still adopts the traditional rotating cylinder measurement method, and the η-t relationship diagram can be obtained, which can be called the apparent viscosity and temperature relationship of volatile slag, such as figure 1 shown. At the same time as the viscosity measurement, the thermogravimetric or burning sample test under the same conditions as the slag sample is carried out, that is, the thermogravimetric and volatilization mechanism research or burning sample under the same conditions as the temperature rise, heat preservation, atmosph...

Embodiment 2

[0060] Data extraction and volatilization impact evaluation of slag viscosity measurement process for electroslag remelting

[0061] basic situation:

[0062] The original composition of slag for electroslag remelting is shown in Table 1.

[0063] Table 1 Electroslag composition

[0064] composition al 2 o 3

MgO SiO2 CaF 2

CaO content / % 29.33 2.57 9.15 30.12 28.83

[0065] According to the conventional viscosity measurement method, the relationship between the slag viscosity and temperature can be obtained as figure 1 shown. It is also determined that the slag loses weight at a high temperature during the viscosity measurement process, and the weight loss at a high temperature above 800°C can reach 8.2%.

[0066] Application method:

[0067] Using the atmosphere, heating rate and holding time of conventional viscosity measurement, the slag roasting test was carried out, and the slag composition changes in the process were obtain...

Embodiment 3

[0074] Data extraction and volatilization impact evaluation of a molten iron pretreatment slag viscosity measurement process

[0075] basic situation:

[0076] The composition of steelmaking slag is shown in Table 3.

[0077] Table 3 Composition of fluorine-containing steelmaking slag (mass fraction)

[0078] composition CaF 2

Al 2 o 3

MgO SiO 2

CaO Na 2 CO 3

content 17.6 3.8 3.0 27.2 27.2 21.2

[0079] According to the conventional viscosity measurement method, the relationship between viscosity and temperature can be obtained as Figure 6 The curve shown in . It is also determined that the high temperature weight loss (weight loss above 800° C.) of the slag during the viscosity measurement process can reach 11.6%.

[0080] Application method:

[0081] Using the atmosphere, heating rate and holding time of conventional viscosity measurement, the slag roasting test was carried out, and the slag composition changes i...

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Abstract

The invention belongs to the technical field of metallurgical engineering, and particularly relates to a method for evaluating the influence of volatile component-containing slag volatilization on viscosity, which comprises the following steps: keeping the proportion of volatile slag unchanged, and measuring the relationship between the viscosity and temperature of the volatile slag by a traditional method; determining corresponding slag viscosities and slag components at different temperatures; performing multiple regression analysis on the corresponding slag viscosities and slag components of the multiple groups of slag with the same initial proportion at different temperatures to obtain the actual corresponding relationship among the slag components, the viscosities and the temperatures; on the basis of the actual corresponding relation of slag components, viscosity and temperature, compared with the relation of viscosity and temperature of volatile slag measured by a traditional method while keeping the proportion of the volatile slag unchanged, the difference value of different viscosities at the same temperature is the influence of volatile slag volatilization on the slag viscosity. The influence of the volatile components of the slag on the viscosity of the slag is fully considered, a more accurate viscosity value is obtained, and the influence of the volatile components of the slag is measured and evaluated.

Description

technical field [0001] The invention belongs to the technical field of metallurgical engineering, and in particular relates to an evaluation method for the influence of volatilization of slag containing easily volatile components on viscosity. Background technique [0002] my country is a major producer of steel and non-ferrous metals. In 2020, the output of steel will reach 1.053 billion tons, the output of non-ferrous metal lead will reach 6.643 million tons, and the output of zinc will reach 6.425 million tons. The production of these bulk metals mainly adopts pyrometallurgy, and for the pyrometallurgical process, the composition and physical and chemical properties of the melt are not only important basis for metallurgical process control, but also key basic data for subsequent utilization. Taking metallurgical slag as an example, its composition and physical and chemical properties are closely related to the temperature control of the smelting process, the interface rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G16C10/00G06Q50/04C22B9/18G01N11/00G01N25/00
CPCG06Q10/0639G06Q50/04G16C10/00C22B9/18G01N11/00G01N25/00C21C2300/06Y02P10/25Y02P90/30
Inventor 赵俊学王泽王国华胡爱琳辛鑫任萌萌崔雅茹李彬王贺
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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