Manufacturing method of high silicon stainless steel for resisting high temperature concentrated sulphuric acid and equipment thereof

A manufacturing method and stainless steel technology, applied in the direction of improving energy efficiency and process efficiency, can solve the problems of affecting the corrosion resistance of materials, low forging yield and high inclusion content, and achieve excellent high temperature sulfuric acid corrosion resistance. , Simple manufacturing process, uniform composition effect
CN107312937AActive Publication Date: 2017-11-03LUOYANG SUNRUI SPECIAL EQUIP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
LUOYANG SUNRUI SPECIAL EQUIP
Publication Date
2017-11-03

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Abstract

The invention relates to a manufacturing method of high silicon stainless steel for resisting the high temperature concentrated sulphuric acid and equipment thereof. Firstly, ingredients of chemical elements of a steel ingot are designed, and a round-shaped electrode is smelted through the technology of intermediate frequency induction furnace primary smelting and argon oxygen decarburizing furnace refining; and the steel ingot is smelted through the technology of electro slag remelting (ESR). The equipment of the manufacturing method of the high silicon stainless steel for resisting the high temperature concentrated sulphuric acid includes the electrode and a liquid slag pool; a protection cover is arranged above the liquid slag pool, an inner cavity is formed in the protection cover, and the electrode is arranged in the inner cavity; an inner wall air outlet hole for inert gas is formed in the bottom of the protection cover, a main air inlet hole for the inert gas is formed below the side face, and a main air inlet hole for the inert gas is formed above the side face. The high silicon stainless steel prepared by the method and the equipment is high in concentrated sulphuric acid corrosion resistance under a high temperature environment, and the corrosion rate of the high silicon stainless steel is lower than 0.08mm / year in a H2SO4 solution with the concentration of 98% at the temperature of 150 DEG C.
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Description

technical field

[0001] The invention relates to the technical field of material preparation, in particular to a method and equipment for manufacturing high-silicon stainless steel for high-temperature-resistant concentrated sulfuric acid. Background technique

[0002] Sulfuric acid is a basic chemical raw material with strong corrosiveness and complicated corrosion process. High-temperature concentrated sulfuric acid produces hydrogen depolarization corrosion and oxygen depolarization corrosion. In high-temperature concentrated sulfuric acid, high-silicon stainless steel has excellent corrosion resistance and is the preferred material in the sulfuric acid industry. Due to the special application environment of high-silicon stainless steel, not only the material is required to have excellent resistance to pitting corrosion crevice corrosion and stress corrosion cracking in high-temperature concentrated sulfuric acid, but also to have excellent plastic deformation properties, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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