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Converter tapping injection refining desulfurization method and device

A desulfurization device and converter technology, applied in the field of secondary refining of steel, can solve the problems of large consumption of slag-forming materials and heat, low interphase mass transfer rate, small contact specific surface area, etc. low investment

Inactive Publication Date: 2019-05-21
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the small specific surface area of ​​slag-liquid steel contact, low interphase mass transfer rate, and slow slag-liquid steel desulfurization reaction rate, to produce low-sulfur steel or ultra-low-sulfur steel, the entire desulfurization smelting process needs to last for about 40 minutes or even longer , and need to consume a lot of slagging materials and heat, the cost is very high

Method used

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  • Converter tapping injection refining desulfurization method and device
  • Converter tapping injection refining desulfurization method and device
  • Converter tapping injection refining desulfurization method and device

Examples

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Embodiment 1

[0050] Such as figure 1 As shown, it is a schematic diagram of the overall composition of the converter tapping powder spraying refining desulfurization device in Example 1 of the present invention. The figure includes a gas storage tank 11, a powder injection station 3, a powder tank 12, a connecting pipeline 2, a spray gun 4, a blowing pipeline 7, a converter 5, and a ladle 6.

[0051] Among them, the gas storage tank 11, the powder injection station 3, the powder material tank 12, the connecting pipeline 2, the spray gun 4, and the injection pipeline 7 constitute the converter tapping powder spraying refining desulfurization device according to the embodiment 1 of the present invention.

[0052] Wherein the gas storage tank 11 is used to store gas, such as Ar or N 2 or a mixture of both. Powder tank 12 is used for powdery desulfurizers, such as refined desulfurization powder, carbon powder, dephosphorization powder and alloy powder. combine figure 2 As shown, the powde...

Embodiment 2

[0060] Such as image 3 As shown, it is another embodiment of the converter tapping powder spraying refining desulfurization device of the present invention. The difference between this embodiment and Embodiment 1 is that: this embodiment does not set the powder spray stick 3 , but sets the powder gas mixing fluidization chamber in the spray gun 4 . The spray gun 4 is provided with a powder inlet 41 and a gas inlet 42, the powder inlet 42 is connected to the powder tank, and the gas inlet 42 is connected to the gas storage tank through a gas supply pipeline. Thereby, the powdery desulfurizing agent and the gas are premixed and fluidized in the spray gun 4 , and then sprayed from the nozzle of the spray gun 4 .

[0061] Further, the spray gun 4 is a double-layer casing with a heat insulating layer, the outer layer is a heat insulating layer, and the inner layer is a spray gun tube of high-temperature-resistant ceramics. The inner diameter of the spray gun tube is 12-50mm, the...

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Abstract

The invention provides a converter tapping injection refining desulfurization method and device. In the converter tapping process, with Ar (or N2) as powder spraying carrier gas, a spraying gun injects powdery desulfurization agents to molten steel streams in the tapping process, so that the powdery desulfurization agents are fed in a ladle with the molten steel streams; and the full mixing is realized under the effect of bottom blowing argon stirring of the ladle, so that the contact specific surface area of the powdery desulfurization agents and molten steel is increased, the inter-phase mass transfer speed and the molten steel desulfurization reaction speed are accelerated, the effective utilization efficiency of the powdery desulfurization agents is improved, the desulfurization refining production takt is accelerated, and the continuous stable efficient refining is realized. The defects in a traditional desulfurization process can be overcome; and the quick and efficient smeltingcan be realized. The powdery desulfurization agents can be replaced by carbon powder, desulfurization powder agents, desulfurization powder agents or alloy powder agents; and the multifunctional refining can be realized. The device and the method are not only suitable for molten steel desulfurization refining processes, but also suitable for other refining processes.

Description

technical field [0001] The invention mainly belongs to the field of secondary refining of iron and steel, and in particular relates to a desulfurization method and device for converter tapping powder spraying refining. Background technique [0002] Improving the cleanliness of molten steel is an important direction for the development of contemporary steel materials. With the development of clean steel production technology and equipment technology, there is no greater technical difficulty in meeting the production requirements of high-quality steel, but how to reduce the production cost of clean steel and achieve stable and efficient production is still a technical challenge for clean steel production . In recent years, optimizing the steel production process, upgrading steel products, and improving corporate competitiveness have become the core tasks of the development of steel companies. Exploring the common technology of building a low-cost, high-efficiency, and fast-pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/064
Inventor 娄文涛王贺刘壮朱苗勇
Owner NORTHEASTERN UNIV
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