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A Calculation Method for Determining Gas Holdup of Gas-liquid Two-phase Flow in Ladle

A technology of gas-liquid two-phase flow and calculation method, which is applied in the field of simulation and simulation of molten iron pretreatment desulfurization process, and can solve the problems of less calculation and the inability to verify the gas-liquid two-phase flow in the molten iron ladle.

Active Publication Date: 2020-09-29
NORTHEASTERN UNIV LIAONING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there are few calculations on gas-liquid two-phase flow gas holdup in ladle, and gas-liquid two-phase flow in ladle cannot be verified, so it is necessary to establish a simulation to describe gas holdup in ladle-water model method, calculate the gas holdup and overflow velocity of the gas at the outlet of the ladle, analyze the amount of liquid phase splash caused by the gas overflow, and detect its impact on the gas holdup and overflow velocity by changing the gas flow rate of the spray gun and the depth of the inserted spray gun and the influence of the amount of splashing, so as to accurately adjust the process parameters in real time and reduce the incidence of accidents

Method used

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  • A Calculation Method for Determining Gas Holdup of Gas-liquid Two-phase Flow in Ladle
  • A Calculation Method for Determining Gas Holdup of Gas-liquid Two-phase Flow in Ladle
  • A Calculation Method for Determining Gas Holdup of Gas-liquid Two-phase Flow in Ladle

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Embodiment 1

[0090] The numerical simulation method of the gas-liquid two-phase flow gas holdup in the ladle-water model, (wherein the present invention adopts the blowing desulfurization method, and the spray gun adopts an inverted "T" type spray gun) comprises the following steps:

[0091] Step 1. Collection of process parameters: On-site investigation of the steelmaking workshop of a steel factory to obtain the process parameters of the ladle during the actual production process, including: diameter of the upper mouth of the ladle, diameter of the bottom of the ladle, height of the ladle, depth of spray gun insertion, nozzle Diameter, injection flow rate of magnesium powder and carrier gas flow rate.

[0092] Step 2. Calculation of the size of the water model: According to the process parameters collected in step 1, including the diameter of the upper mouth of the ladle, the diameter of the bottom of the ladle, the height of the ladle, the insertion depth of the spray gun, and the diamet...

Embodiment 2

[0157] Step 1. Collection of process parameters: On-site investigation of the steelmaking workshop of a steel factory to obtain process parameters in the actual production process, including: diameter of the upper mouth of the ladle, diameter of the bottom of the ladle, height of the ladle, depth of spray gun insertion, diameter of the nozzle, Magnesium powder injection flow rate and carrier gas flow rate. Its specific data are shown in Table 1:

[0158] Table 1 process parameters

[0159]

[0160]

[0161] Step 2. Calculation of the size of the water model: According to the process parameters collected in step 1, including the diameter of the upper opening of the ladle, the diameter of the bottom of the ladle, the height of the ladle, the insertion depth of the spray gun, and the diameter of the nozzle, the water model is determined based on the geometric similarity theory The geometric size of the water model, the similarity ratio is 1:5, that is, the size is reduced by...

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Abstract

The invention relates to a calculation method for determining the gas content rate of the gas-liquid two-phase flow in the molten iron ladle. According to the actual process parameters of the molten iron ladle, a two-dimensional geometric model of the water model is established to determine the gas injection flow rate Q in the water model. m , establish a gas-liquid two-phase flow model and a gas-liquid interaction force model, and obtain the gas holdup distribution map and gas-liquid phase flow field in the water model. The method of the invention can calculate the gas content rate and overflow speed of the gas at the outlet of the molten iron ladle, analyze the amount of liquid phase splash caused by the gas overflow, and detect its effect on the gas content rate by changing the gas flow rate of the spray gun and inserting the spray gun depth. , overflow speed and splash volume, which can be used to accurately adjust various process parameters in real time to reduce the incidence of accidents.

Description

technical field [0001] The invention relates to a calculation method for determining the gas holdup of a gas-liquid two-phase flow in a molten iron ladle, and belongs to the simulation field of the pretreatment desulfurization process of molten iron. Background technique [0002] With the development of the steel industry, processing manufacturing industry and steel-related industries, steel users have higher and higher requirements for steel quality. Sulfur, as a major harmful element in steel, not only tends to cause hot embrittlement of steel, reduces the ductility, toughness and corrosion resistance of steel, but also tends to cause cracks in steel. Therefore, the content of sulfur element should be controlled as much as possible to ensure the quality of steel. Hot metal pretreatment desulfurization technology not only has good desulfurization effect, but also has low desulfurization cost, so hot metal pretreatment technology has become an essential link in the producti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 郑淑国王鑫朱苗勇
Owner NORTHEASTERN UNIV LIAONING
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