Premelting slag used for producing container steel of hydrogenation reactor and application thereof

A technology of hydrogenation reactor and pre-melted slag, which is applied in the application field of production of hydrogenation reactor container steel, can solve the problems of not being able to meet the requirements of low silicon, and achieve the effects of improving product competitiveness, increasing productivity, and reducing costs

Inactive Publication Date: 2014-11-26
武钢集团有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, pre-melted slag with high content of silica cannot meet the requirements of low silicon in hydrogenation reactor vessel steel

Method used

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  • Premelting slag used for producing container steel of hydrogenation reactor and application thereof
  • Premelting slag used for producing container steel of hydrogenation reactor and application thereof
  • Premelting slag used for producing container steel of hydrogenation reactor and application thereof

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] The production process of the present invention for producing 120-160 mm thick high-purity hydrogenation reactor vessel steel includes the electroslag remelting smelting step and the steel plate rolling step as in the prior art, and the electroslag remelting smelting step adopts low-frequency bipolar The series slab electroslag remelting furnace is used for remelting and smelting. The difference is that the chemical composition and weight percentage of the electrode base material of the low-frequency bipolar series slab electroslag remelting furnace of the present invention meet the following requirements:

[0031] C: 0.08~0.12%, Si: 0.05~0.12%, Mn: 0.30~0.45%, P: ≤0.012%, S: ≤0.010%, Cr: 2.10~2.25%, Ni: ≤0.18%, Mo: 0.95~ 1.10%, Cu: ≤0.12%, Sn: ≤0.005%, As: ≤0.004%, Sb: ≤0.003%, N: ≤0.008%, O≤0.003%, and the rest are Fe and una...

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Abstract

The invention discloses a premelting slag used for producing a container steel of a hydrogenation reactor and an application thereof. The premelting slag comprises the following components by weight percentage: 45-55% of CaF2, 20-30% of Al2O3, 15-25% of CaO, 0-5% of SiO and 0-5% of MgO. The application of the premelting slag for production of the container steel comprises an electroslag remelting and smelting step and a steel plate rolling step, and normalizing heat treatment is carried out after steel plate rolling is completed. By aiming at component requirement of the low silicon of the container steel, the premelting slag employs five-membered slag, wherein content of SiO2 and CaF2 is low, silicon content increase of the container steel of the hydrogenation reactor can be avoided, CaF2 volatilization is reduced, and synergism of Al2O3, CaO and MgO can obviously reduce the conductivity of the premelting slag, power consumption is reduced, productivity is increased, and the premelting slag of the present invention can be used for producing high purity container steel plate.

Description

technical field [0001] The invention belongs to the technical field of metal smelting, and in particular relates to a pre-melted slag used for producing hydrogenation reactor vessel steel and its application in producing hydrogenation reactor vessel steel. Background technique [0002] Pressure vessel steel has a wide range of uses and is widely used in petroleum, chemical, power station, boiler and other industries. It is generally used to make reactors, heat exchangers, separators, air ducts, boiler drums, etc. 12Cr2Mo1R container steel is mainly used for hydrogenation reactor, which is a major key equipment in the modern oil refining industry. It usually operates under the harsh working conditions of high temperature and high pressure, hydrogenation, hydrogen sulfide and other corrosive media, so it needs to resist temper brittleness. Hydrogenation reactors are made of raw materials with strong chemical resistance and hydrogen corrosion resistance. [0003] Since the hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/18C21D8/02
Inventor 熊涛董汉雄王世森张云燕熊玉彰洪君李德发张新宇梁宝珠陈勇余宏伟李银华易勋
Owner 武钢集团有限公司
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