Deep deoxidizing apparatus and application thereof

A deep deoxidation and deoxidizer technology, applied in the field of deep deoxidation devices, can solve the problems of expensive platinum catalysts, insufficient deoxidation precision, and low deoxidation capacity, and achieve reduced deoxidation effect, fast deoxidation speed, and large deoxidation capacity. Effect

Active Publication Date: 2015-06-10
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the above direct deoxygenation methods, the effect of catalytic hydrodeoxygenation is better, but the residual oxygen content is still high; and platinum catalysts are expensive, and are extremely sensitive to atmospheres containing carbonyl sulfide and high oxygen content, and are prone to poisoning
[0008] To sum up, the existing deoxygenation technology has low deoxygenation capacity, or the deoxygenation precision is not deep enough, or the deoxygenation efficiency is low, or the deoxidation method of catalytic reducing gas is easy to be poisoned, or some reaction systems are preferably carried out under high pressure conditions, resulting in safety. One or more problems such as low coefficient

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  • Deep deoxidizing apparatus and application thereof
  • Deep deoxidizing apparatus and application thereof
  • Deep deoxidizing apparatus and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0068] The raw material Ar gas flow is set at 250ml / min, the temperature is kept constant at 300°C, and Figure 5 It is a schematic diagram of the change of oxygen content after 2 h of flowing Ar gas. After 184 minutes of the test, the oxygen content at the inlet and outlet of the furnace decreased to 1.79×10 -11 / 2.34×10 -5 ppm; after another 55 minutes, the oxygen content at both ends was basically stable at 10 -11 ppm, with an average of 1.442×10 -11 / 5.470×10 -11 ppm.

Embodiment 2

[0070] Example 2 is following Example 1, and the gas temperature is changed to 400°C, that is, after Ar gas is still introduced at 250ml / min for 132min, the oxygen content at the inlet and outlet is finally reduced to 10 -15 / 10 -14 ppm, see the attached schematic diagram for the change of oxygen content Figure 5 . It can be seen from the figure that the oxygen content decreases steadily, and the average oxygen content at the intake end is 4.55×10 -15 ppm, the average oxygen content at the gas outlet is 4.15×10 -14 around ppm, which will further reduce the oxygen content over time.

Embodiment 3

[0072] Compared with Example 1, the difference is that Ar-10%H was introduced when the gas temperature was 300°C 2 Mixed gas, namely Ar, H 2 The flow rates were adjusted to 250 and 25ml / min respectively. After 200 minutes, the oxygen content at the inlet and outlet was stabilized at 10 -19 / 10 -18 ppm, the schematic diagram of oxygen content change after 144min is attached Figure 6 . It can be seen from the figure that when Ar and H 2 Mixed gas, the oxygen content is greatly reduced, and after 344 minutes of the experiment, the oxygen content at the inlet end changes slightly, and the oxygen content at the outlet end may be affected by the mixed gas flow in the furnace. ppm).

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Abstract

The invention relates to a deep deoxidizing apparatus and an application thereof, and belongs to the technical field of chemical reaction deoxidization. The deep deoxidizing apparatus designed by the invention comprises a gas heating device (4), a No.1 deoxidizing channel (1), a No.2 deoxidizing channel (2) and a No.3 deoxidizing channel (3) which are sequentially communicated, wherein a No.1 deoxidizing agent is contained inside the No.1 deoxidizing passage (1), and the No.1 deoxidizing agent is selected from one of elemental metallic copper and copper-based alloy; a No.2 deoxidizing agent is contained inside the No.2 deoxidizing channel (2), and the No.2 deoxidizing agent is selected from one of elemental metallic titanium, sponge titanium and titanium-based alloy; a No.3 deoxidizing agent is contained inside the No.3 deoxidizing passage (3), and the No.3 deoxidizing agent is selected from one of elemental magnesium and magnesium-based alloy. The apparatus disclosed by the invention, when applied to deoxidizing treatment on Ar gas which is 99.999% in purity, can achieve a deoxidizing precision of 10-21ppm. The apparatus designed by the invention can carry out efficient deep deoxidization under normal pressure, and has the advantages of simple equipment, recycling use of the deoxidizing agents and the like.

Description

technical field [0001] The invention relates to a deep deoxidation device and its application, belonging to the technical field of chemical reaction deoxidation. Background technique [0002] In the iron and steel metallurgical production process, oxygen, sulfur, phosphorus, hydrogen, nitrogen, etc. are several harmful elements that seriously damage the quality of slabs. It is the goal of the 21st century to reduce the total content of such non-metallic elements within the range of 30ppm. Among them, oxygen not only reduces the hot brittleness of steel, but also can significantly reduce the surface tension of molten steel. According to page 389 of the third edition of "Principles of Iron and Steel Metallurgy" compiled by Huang Xihu, the bibliography, it is clearly pointed out that the dissolved oxygen content in boiling steel should be reduced to 250-300ppm; the dissolved oxygen content in killed steel should be less than 50ppm. Committed to the study of the wetting behavio...

Claims

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Application Information

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IPC IPC(8): C21C7/06
Inventor 王万林周乐君邹格罗薛超马范军黄道远谢森林
Owner CENT SOUTH UNIV
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