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本发明提出了钢铁热处理炉内气氛控制的改进方法。载气用甲醇和氮气混合气制成。根据甲醇和氮气流量以及添加气(如甲烷)流量与炉气中CO含量的相互关系,采用本发明,测量炉内合适位置或不同位置气氛中的CO含量,调节甲醇和(或)氮气流量,使气氛中CO含量保持在要求值。同时,通过对于测碳势敏感的各种方法,来控制改变炉气碳势的添加气的量或流量。根据本发明的一个具体方面,调节甲醇和氮气流量保持所要求的CO含量而不影响炉气的碳势,调节添加气(甲醇气)流量,保持所需要的碳势而不影响炉气氛的碳势。根据发明的另一个具体方面,气氛中CO含量以及气氛碳势是分别控制的,能做到
The present invention provides an improved method of atmosphere control in a steel heat treatment furnace. Carrier gas with methanol and nitrogen mixture made. According to the relationship between the flow rate of methanol and nitrogen and the flow rate of the added gas (such as methane) and the CO content in the furnace gas, the present invention measures the CO content in the atmosphere in different places or in the furnace to regulate the flow rate of methanol and / The atmosphere of the CO content to maintain the required value. At the same time, the amount or flow rate of the added gas that changes the carbon potential of the furnace gas is controlled by various methods that are sensitive to the carbon potential. According to a particular aspect of the invention, adjusting the flow of methanol and nitrogen to maintain the desired CO content without affecting the carbon potential of the furnace gas, adjusting the flow of the added gas (methanol gas), maintaining the required carbon potential without affecting the carbon of the furnace atmosphere Potential. According to another specific aspect of the invention, the CO content in the atmosphere and the carbon potential in the atmosphere are controlled separately,