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Pre-deoxidation recarburization process for arc furnace steel-smelting molten steel with slag

A pre-deoxidation carburization and electric arc furnace technology, applied in the field of electric arc furnace steelmaking production process, can solve the problems of increased deoxidation products of molten steel, increased deoxidizer consumption, and reduced cleanliness of molten steel, etc., to reduce the generation of endogenous inclusions , Improve alloy yield, reduce the effect of dosage

Inactive Publication Date: 2008-07-23
TIANJIN PIPE GROUP CORP
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Problems solved by technology

As a result, the amount of deoxidizer is increased, and the deoxidation products of molten steel increase, which reduces the cleanliness of molten steel and affects the quality of steel

Method used

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  • Pre-deoxidation recarburization process for arc furnace steel-smelting molten steel with slag
  • Pre-deoxidation recarburization process for arc furnace steel-smelting molten steel with slag
  • Pre-deoxidation recarburization process for arc furnace steel-smelting molten steel with slag

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Embodiment Construction

[0016] The pre-deoxidation and carburization process of molten steel with slag in the electric arc furnace steelmaking furnace of the present invention will be described in detail below in conjunction with the embodiments.

[0017] In the modern 90t ultra-high-power electric arc furnace steelmaking process using scrap steel, molten iron and other steel materials as raw materials, the furnace wall oxygen lance and furnace door oxygen lance manipulator are used to blow oxygen into the furnace for primary oxidation to remove carbon in the steel , phosphorus and other elements. After the electric arc furnace is charged, it is smelted with electricity, and at the same time, lime and dolomite slagging materials are continuously added to dephosphorize the molten steel; when the steelmaking in the electric arc furnace is completed, and the composition and temperature of the molten steel in the furnace meet the tapping conditions, the power supply is stopped at this time and oxygen blo...

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Abstract

The invention relates to a pre-deoxidation and carburization craft of molten steel with slag in the electric-arc steelmaking furnace, comprising the following steps: (1) charging; (2) electrifying melting; (3) oxygen blowing to boost melting; (4) oxidation refining; (5) temperature measuring and sampling; (6) addition of deoxidizer (7) tapping. The pre-deoxidation and carburization craft of molten steel with slag in the electric-arc steelmaking furnace solves the problems in the prior art of high oxidation of molten steel in the electric-arc steelmaking furnace and low carbon content. The pre-deoxidation and carburization craft of molten steel with slag in the electric-arc steelmaking furnace has the advantages that: 1. the craft has easy operation and obvious effect. The carbon content of the steel in the electric furnace is increased, the oxygen content in molten steel is decreased and over-oxidation of the molten steel is avoided. 2. the addition of deoxidizer used for the molten steel outside the furnace is reduced, impurities content in steel is reduced and yielding rate the of the alloy is enhanced.

Description

technical field [0001] The invention relates to an electric arc furnace steelmaking production process, in particular to a process for pre-deoxidizing and carburizing molten steel with slag in an electric arc furnace steelmaking furnace capable of solving the problem of converting the electric arc furnace steelmaking into a converter. Background technique [0002] At present, in the steelmaking process of modern ultra-high-power electric arc furnaces that use scrap steel, molten iron and other steel materials as raw materials, comprehensive injection technology is used to strengthen and optimize the use of oxygen and coal powder, and increase auxiliary energy, thereby increasing the smelting intensity and speeding up smelting Rhythm, so that the modern electric arc furnace steelmaking converter. However, the carbon content of the electric arc furnace molten steel under the production process conditions is 0.02-0.05%, and the oxygen content is 1000-1500ppm, or even higher. A...

Claims

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Application Information

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IPC IPC(8): C21C7/00C21C7/064C21C7/068C21C7/06
Inventor 姜桂连姚家华王学义马全锋
Owner TIANJIN PIPE GROUP CORP
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