Online molten steel refining process

Abstract

The invention discloses an online refining technology of molten steel. The online refining technology of the molten steel comprises the technological processes of draining sand filling of a hollow steel ladle, primary melting furnace tapping, online argon blowing, steel ladle conveying, molten steel refining and the like. Two or three molten steel conveying lines are converged into one line through an intersected turnout, an inverted-V-shaped molten steel conveying line or a molten steel conveying line shaped like the Chinese character 'ge' is formed, the inverted-V-shaped molten steel conveying line or the molten steel conveying line shaped like the Chinese character 'ge' is communicated with a tapping station of the primary melting furnace and two or three refining stations of a refining furnace, a steel ladle vehicle carries a steel ladle to operate between the tapping position and the refining positions, one primary melting furnace corresponds to two to three refining stations online, and continuous, compact, dynamic and orderly online refining technology processes of the molten steel are achieved. Due to the crossed molten steel conveying lines, a crown block is not used for lifting molten steel, the online refining technology for molten steel is achieved, waiting of the steel ladle is reduced, the interference of the crown block is eradicated, the circulation period of the steel ladle is shortened by 20-30 min, the tapping temperature of molten steel is lowered by 10-15 DEG C, the construction cost is saved, and the operation cost and the production cost are reduced.

Description

technical field [0001] The invention belongs to the technical field of metallurgical industry, in particular to an on-line molten steel refining process. Background technique [0002] In the steelmaking production process, the logistics, information flow and energy supply in the primary smelting-refining production process involve a large number of continuous and discrete process variables, and the production unit itself has many variable factors, making the process very complicated. The new generation of iron and steel process requires iron and steel enterprises to adopt a reasonable production process and system configuration. Based on the establishment of a continuous, compact, dynamic and orderly plan, furnace machine matching and logistics transportation in the process are the prerequisites for the establishment of the process. [0003] In the existing primary refining-refining process, the refining process mainly has the following two modes: [0004] 1) Offline refini...

AI Technical Summary

Problems solved by technology

When this mode is running, the crane is not used during the transportation of molten steel, which reduces the interference of the crane and the waiting of molten steel, but the refining furnace can only be a single refining position, and the refining cycle (T 精炼 ) and auxiliary time (T 辅助 ) is less than the smelting period of the primary furnace (T 初炼 ), namely (T 精炼 )+(T 辅助 )初炼 ), to realize the online refining process, but in actual production, the refining cycle (T 精炼 ) and auxiliary time (T 辅助 ) is greater than the smelting period of the primary smelting furnace (T 初炼 ), and there is only one molten steel transportation line, which cannot meet the rhythmic continuous production at this time, resulting in the interruption of production in the steelmaking workshop

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