Method for determining oxygen blowing amount and cold material feeding amount in RH refining process
A technology of refining process and oxygen blowing amount, which is applied in the field of determining the oxygen blowing amount and cold material addition amount in the RH refining process, can solve problems such as rising production costs, declining molten steel quality, and prolonging RH treatment time, so as to improve quality, The effect of improved accuracy and shortened time
Active Publication Date: 2006-06-07
BAOSHAN IRON & STEEL CO LTD
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However, the above two methods will lead to many disadvantages such as prolonged RH treatment time, increased production costs, and decreased quality of molten steel.
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[0024] In order to determine the required amount of oxygen blowing and cold material addition, it is first necessary to establish a method that can accurately predict the temperature of the molten steel at the end of the RH treatment. In the process of RH treatment, the factors affecting the temperature of molten steel can generally be classified into two categories, one can be quantified based on the metallurgical mechanism model or production data, such as the number and type of alloy, the amount of oxygen blowing and the amount of cold material added, etc. , another type of factor often has very complex nonlinear characteristics, and it is difficult to accurately describe it with physical or thermodynamic models and production data. We will refer to it as the natural temperature drop factor below. For the former type of factors, the algebraic model derived based on the metallurgical mechanism model or production data can be used for calculation, while for the latter type of ...
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The method of determining oxygen blowing amount and cold material feeding amount in RH refining process can short RH treating time, lower production cost and raise molten steel quality. During determining the predicted molten steel temperature in finishing RH refining, the temperature change amount is decomposed into different temperature lowering components caused by addition of alloy, oxygen blowing, natural temperature lowering, etc. and the nerve network model is used in calculating the temperature change component caused by natural temperature lowering. The oxygen blowing amount and the cold material feeding amount are determined based on the difference between the predicted molten steel temperature and the destination molten steel temperature. For un-deoxygenated molten steel, the present invention also provides the calculation method of determining the required oxygen blowing amount before quieting.
Description
technical field [0001] The invention relates to the field of production and control of metallurgical processes, in particular to a method for determining the amount of oxygen blowing and cold material addition in the RH refining process. Background technique [0002] As users have higher and higher requirements for steel varieties and quality, the application of RH refining has gradually increased. At the same time, higher requirements have been put forward for the process control of RH treatment. Therefore, RH refining furnace has become a must for the production of many high-grade steel types. Indispensable refining equipment. The main feature of the RH treatment process is to achieve decarburization, degassing, adjustment of molten steel temperature and composition, and removal of inclusions in molten steel through the circulation of molten steel in the vacuum tank and ladle, supplemented by top gun oxygen blowing. metallurgical function. figure 1 A schematic diagram of...
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IPC IPC(8): C21C7/04C21C7/06
Inventor 杜斌谢树元林云
Owner BAOSHAN IRON & STEEL CO LTD