Hydrogen content control method of electroslag remelting smelting molten steel
A technology of electroslag remelting and control method, which is applied in the field of electroslag remelting and smelting, and can solve the problems of condensation on the surface of cold molds, excessive hydrogen content of steel, and absorption.
Active Publication Date: 2014-01-01
宝武特种冶金有限公司
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Problems solved by technology
[0003] After years of practice, it is found that there are the following shortcomings in the production process of electroslag remelting: (1) condensation will occur on the surface of the cold crystallizer at the initial stage of melting; (2) the process of electroslag remelting will absorb the atmosphere problems such as water vapor in the
Cause water molecules to enter the smelting process and decompose hydrogen elements into molten steel, which in turn causes the hydrogen content in the steel to exceed the standard, reflecting that the quality of the finished steel cannot meet the quality requirements of customers
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[0014] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0015] see figure 1 As shown, the method for controlling the hydrogen content of molten steel in electroslag remelting smelting of the present invention is to form dry hot air after the air is dried, filtered and heated, and is passed through the pipeline through the high-speed nozzle before and during the smelting process. Continuously blow into the crystallizer to discharge the cold and wet air in the crystallizer, and form a dry hot air protection to prevent the inhalation of cold and wet air during the smelting process. After many experiments and explorations, the blown dry hot air The dew point is 2 , such as 1.8kg / cm 2 , 2kg / cm 2 or 2.2kg / cm 2 ;The flow rate is 10m 3 / h / furnace, such as 11m 3 / h / furnace, 12m 3 / h / furnace or 14m 3 / h / furnace; the heating temperature is controlled at 50-90°C, such as 60°C, 70°C or 8...
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The invention discloses a hydrogen content control method of electroslag remelting smelting molten steel, according to the hydrogen content control method, air is dried, filtered and heated to form a dry hot air, and before smelting and in a melting process through a high-speed nozzle the dry hot air is continuously blew into a crystallizer so as to discharge cold and wet air in the crystallizer to form dry hot air protection to prevent cold wet air indrawing in the melting process. Dew condensation melting producing on the surface of the crystallizer in the early melting stage can be effectively prevented. The problem that hydrogen content in steel is out of limits can be effectively prevented, wherein the problem is caused by hydrogen element getting into the molten steel, and the hydrogen element is formed by decomposition of water molecules which enter the melting process due to cold wet air indrawing in the electroslag smelting process, so that the quality and grade of the steel can be ensured and the economic efficiency of enterprises can be improved.
Description
technical field [0001] The invention relates to electroslag remelting smelting, and more specifically relates to a method for controlling the hydrogen content of molten steel in electroslag remelting smelting. Background technique [0002] Electroslag remelting is an important smelting production method for producing high-quality alloy steel. Hydrogen is a harmful element in the finished steel, and it is necessary to minimize the entry of hydrogen into the finished steel during the electroslag remelting production process. In the electroslag remelting process, the hydrogen element enters the steel mainly through water molecules, and the hydrogen element is decomposed during the smelting process and enters the molten steel. [0003] After years of practice, it is found that there are the following shortcomings in the production process of electroslag remelting: (1) condensation will occur on the surface of the cold crystallizer at the initial stage of melting; (2) the proces...
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Login to View More IPC IPC(8): C22B9/18C21C5/00B22D23/10
Inventor 周强孙光华黄兴涛韦剑宏
Owner 宝武特种冶金有限公司