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A device and method for improving converter slag splashing effect

A converter and slag splashing technology, applied in the manufacture of converters, etc., can solve problems such as uneven slag splashing, achieve the effect of improving cooling capacity, increasing viscosity and uniformity, and promoting rapid cooling

Active Publication Date: 2019-02-01
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a device and method for improving the slag splashing effect of the converter, so as to solve the problem of uneven slag splashing in the prior art; The invention has the function of injecting magnesium material and nitrogen. On the basis of ensuring that the slag has a certain viscosity, the swing of the slag splashing spray gun is used to perform all-round slag splashing, thereby realizing the long life of the converter.

Method used

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  • A device and method for improving converter slag splashing effect
  • A device and method for improving converter slag splashing effect
  • A device and method for improving converter slag splashing effect

Examples

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Embodiment 1

[0053] In a 300kg-class converter thermal simulation test furnace, after the blowing is completed and the molten steel is poured out, the remaining slag is 20kg; the composition is CaO 42%, MgO 10.14%, SiO 2 11.13%, TFe 14.04%, Al 2 o 3 1.79%, MnO 3.3%. Adopt the high-efficiency slag splashing device of the present invention, spray 2kg of dolomite powder into the molten slag in the molten pool through the first pipeline 1 of the spray gun, the particle size is 0.5mm, the pressure of spraying dolomite powder is 0.8Mpa, and the flow rate is 20kg / min After blowing for 1 minute, close the injection valve of the first pipeline 1, open the second pipeline 2, and blow into the molten pool with a pressure of 0.8Mpa and a flow rate of 72Nm 3 Nitrogen gas per hour, the nitrogen gas blowing time is 3min. When blowing gas, the high-efficiency slag splashing device rotates clockwise 360° through the rotating mechanism. During the blowing process, the circulating water is in the open s...

Embodiment 2

[0055] In a 300kg-class converter thermal simulation test furnace, after the blowing is completed and the molten steel is poured out, the remaining slag is 28kg; the composition is CaO 36.33%, MgO 11.19%, SiO 2 9.69%, TFe 19.44%, Al 2 o 3 1.28%, MnO 3.42%. Using the high-efficiency slag splashing device of the present invention, first spray 3kg of light-burned dolomite powder into the molten slag in the molten pool through the first pipeline 1 of the spray gun, the particle size is 0.5mm, the pressure of spraying magnesia material is 0.7Mpa, and the flow rate is 15kg / min, after 1 minute of injection, close the injection valve of the first pipeline 1, open the second pipeline 2, and blow into the molten pool with a pressure of 1.1Mpa and a flow rate of 84Nm 3 Nitrogen per hour, blowing nitrogen time is 3min, the spray gun rotates clockwise 360° when blowing, the height of the spray gun from the slag is 0.5 ~ 1.4m, first high and then low; during the whole blowing process, ...

Embodiment 3

[0057] In a 300kg-class converter thermal simulation test furnace, after the blowing is completed and the molten steel is poured out, the remaining slag is 28kg; the composition is CaO4 2.12%, MgO 9.33%, SiO 2 10.64%, TFe 15.23%, Al 2 o 3 2.08%, MnO 3.22%. Using the high-efficiency slag splashing device of the present invention, first spray 2kg of waste magnesia-carbon brick powder into the molten slag in the molten pool through the first pipeline 1 of the spray gun, the particle size is 0.5mm, the pressure of spraying magnesia material is 0.85Mpa, and the flow rate is 25kg / min, close the injection valve of the first pipeline 1 after spraying for 1min, open the second pipeline 2, the injection pressure is 1.5Mpa, and the flow rate is 90Nm 3 Nitrogen per hour, the blowing time of nitrogen is 4min, and the device for improving the effect of converter slag rotates clockwise 360° when blowing; During the process, the circulating water is in open state. After the slag splash...

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Abstract

The invention relates to a device for improving the slag splashing effect of a converter. The device mainly comprises a gun body and a spray head. The spray head is fixed to the lower end of the gun body and communicates with pipes inside the gun body. The pipes inside the gun body comprise the first pipe, the second pipe, the third pipe and the fourth pipe. The first pipe is located inside the second pipe; the second pipe is located inside the third pipe; and the third pipe is located inside the fourth pipe. Pipes inside the spray head comprise the fifth pipe, the sixth pipe, the seventh pipe and the eighth pipe. The fifth pipe is located inside the sixth pipe and communicates with the first pipe; the sixth pipe is located inside the seventh pipe and communicates with the second pipe; the seventh pipe is located inside the eighth pipe and communicates with the third pipe; and the eighth pipe communicates with the fourth pipe. Meanwhile, the invention further provides a method for improving the slag splashing effect of the converter. The device and method for improving the slag splashing effect of the converter have the beneficial effects that on the basis that it is guaranteed that converter slag has certain viscosity, slag splashing is conducted in an all-directional manner through swinging of the slag splashing spray gun, and thus the long service life of the converter is achieved.

Description

technical field [0001] The invention belongs to the technical field of converter slag splash protection technology, and in particular relates to a device and method for improving the effect of converter slag splash. Background technique [0002] The converter slag splash protection technology has been applied to the steelmaking process of the combined blowing converter, and achieved good results, ensuring the blast furnace life of the converter. Converter slag splash protection technology is to leave all or part of the slag after the converter is tapped, use an oxygen lance to spray high-pressure nitrogen gas on the slag, impact the slag, make the slag splash on the furnace lining, and form an anti-corrosion protective layer on the surface of the furnace lining , to achieve the purpose of protecting the furnace lining. [0003] From the point of view of the slag splashing furnace protection process, most steel mills use the same slag splashing and blowing lances, but there ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/46C21C5/36
CPCC21C5/36C21C5/4606
Inventor 吴伟王鹏林瑛李相臣梁强林路
Owner CENT IRON & STEEL RES INST