Operation technology for electric furnace converter

Abstract

The invention discloses an operation technology for an electric furnace converter. A furnace burden structure containing 85-95% of molten iron and 5-15% of steel scrap is adopted; after a furnace lid of an electric furnace is opened, the steel scrap is added at one time through a material basket; molten iron is continuously blended at a speed of 2.0-4.0 tons per minute by utilizing an iron blending device, and meanwhile, an oxygen flow is jetted into the furnace through three furnace-wall praxair carbon oxygen guns which are mounted on the furnace wall; the oxygen supply strength is adjusted according to a blowing condition in the furnace and the carbon content in the furnace stabilized at 0.40-0.80% is ensured; lime, return mine and limestone are added while oxygen is blown; slagging is performed and temperature of the molten steel in the furnace is adjusted; during a blowing process, the temperature of the molten steel in the electric furnace is controlled within a range of 1500 DEGC to 1560 DEG C and the stability of carbon oxygen reaction in the furnace is ensured; and the temperature of the molten steel is controlled within the range of 1600 DEG C to 1650 DEG C at end point of the electric furnace, thereby finishing electric furnace smelting. According to the operation technology provided by the invention, the problems of serious splashing and difficulty in dephosphorization of electric furnace converter production are solved, the splashing is light, the time of electric furnace smelting is short, and energy conservation and cost reduction are realized.

Description

[0001] Technical field [0002] The present invention is a metallurgical field, involving an operating process of an electric furnace. Specifically, it is an operation process that can reduce power and electrode consumption. Background technique [0003] At present, the electric furnace steelmaking plant uses 60-40%scrap steel and 40-60%iron furnace structure. It provides oxygen in the furnace through the Moore oxygen gun and three furnace wall firing flow guns.Switching is used for power, and the smelting power consumption is as high as 225kWh / T, and the electrode consumption is as high as 1.2kg / T. Therefore, the production cost of electric furnace is much higher than the cost of smelting furnace. [0004] In the conventional ultra -high -power arc furnace type, open the furnace cover and add waste steel directly to the furnace through the material basket. figure 1 It is a schematic diagram of the installation location of the oxygen gun in the existing technology. figure 1 In th...

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Problems solved by technology

[0006] In order to overcome the problems existing in the original electric converter operation process, the object of the present invention is to provide an electric furnace conversion operation process, which solves the problems of severe splatter and difficult dephosphorization in the production , the electric furnace smelting time is short, realizing energy saving and cost reduction

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