Method for reducing content of metal chromium gas in metal smelting
By sealing the furnace and using inert argon gas to cool chromium ingots, the method significantly reduces oxygen and nitrogen levels in chromium, addressing the quality and performance issues in high-temperature alloys.
CN119685627APending Publication Date: 2025-03-25JINZHOU HONGDA METAL NEW MATERIAL TECHNOLOGY CO LTD
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Patent Information
- Application Number
- CN202411787689.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-03-25
AI Technical Summary
Technical Problem
Current metal chromium production methods, such as the aluminum reduction process, struggle to maintain low oxygen and nitrogen levels in chromium, which are detrimental to the quality and performance of high-temperature alloys, particularly affecting their strength, toughness, and weldability.
Method used
The method involves sealing the furnace in a pressurized chamber and using inert argon gas to cool the chromium ingots, reducing oxygen and nitrogen absorption from the air, thereby lowering their content in the metal.
Benefits of technology
This approach effectively reduces oxygen and nitrogen levels in chromium from 0.1-0.3% and 0.01-0.02% to 0.04-0.08% and 0.004-0.008%, respectively, enhancing the chromium's quality and performance in high-temperature applications.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to a metal smelting method, in particular to a method for reducing the content of metal chromium gas in metal smelting, which comprises the following steps: firstly, placing a smelting furnace in a device capable of being sealed to isolate the whole smelting furnace from air; the first step is smelting; the cooling time of the stage is adjusted according to the smelting batch number, cooling is conducted in the air, finally, the chromium ingot is cooled to the normal temperature in the air, and sand blasting finishing, crushing, weighing and packaging are conducted. According to the method, the smelted metal chromium ingot is cooled in the argon introducing environment, and the situation that the chromium ingot absorbs oxygen and nitrogen in air in the high-temperature environment during cooling is avoided, so that the oxygen content and the nitrogen content in the metal chromium are reduced, the oxygen content is reduced to 0.04%-0.08% from current 0.1%-0.3%, the nitrogen content is reduced to 0.004%-0.008% from current 0.01%-0.02%, the quality of the metal chromium is improved, and the cost is reduced. And a remarkable technical effect is achieved.
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