A method for preventing slag from the sub-lance tip of a steelmaking furnace

Abstract

The invention relates to method for preventing slag from adhering to a sublance head of a steel refining furnace. The method is characterized in that a refueling device comprises a cylinder, a hinge four-link mechanism, a dry oil pump, and oil pipes, wherein the hinge four-link mechanism is connected with the front end of a piston rod; a left refueling block is fixed at the inner side of the front end of a left lengthened hinge rod; a right refueling block is fixed at the inner side of the front end of a right lengthened hinge rod; and the oil tube is communicated with the left refueling block and the right refueling block. The method for preventing slag from adhering to the sublance head of a steel refining furnace comprises the following steps of: 1, opening a left hoop and a right hoop before the sublance head engages into refueling work at the mounting position of the sublance head, and starting the dry oil pump, so that lubricating grease flows downwards along the inner walls of the left hoop and the right hoop; II, holding the sublance head by the left hoop and the right hoop after the sublance head enters a refueling position; III, enabling the sublance head to act downwards; driving the hinge four-link mechanism to open the left hoop and the right hoop and driving the sublance head to move out of the refueling position; and IV, inserting the lubricating grease into the furnace along with the sublance head. By adopting the method for preventing slag from from adhering to the sublance head of the steel refining furnace disclosed by the invention, sublance equipment can stably work for a long period of time; and the equipment maintenance cost is reduced.

Description

technical field [0001] The invention relates to a method for preventing the tip of a sub-lance of a steelmaking furnace from sticking to slag, in particular to a method for preventing the tip of a sub-lance of a steelmaking converter or an argon-oxygen furnace from adhering to steel slag and scrap steel. Background technique [0002] When the sub-lance is sampling, the temperature probe needs to pass through the steel slag layer and insert it under the molten steel surface. Therefore, the tip of the water-cooled gun body adjacent to the temperature probe inevitably adheres to steel slag or even scrap steel, which is difficult to clean and cannot be used. It must be overhauled off-line. During this period, the function of the auxiliary gun is lost, and manual sampling is still used. The carbon steel converter auxiliary gun can be used after cleaning the steel slag with an oxygen cutting gun. The only way to prevent slag from the sub-lance tip of the steel furnace is to cut th...

AI Technical Summary

Problems solved by technology

[0002] When the sub-lance is sampling, the temperature probe needs to pass through the steel slag layer and insert it under the molten steel surface. Therefore, the tip of the water-cooled gun body adjacent to the temperature probe inevitably adheres to steel slag or even scrap steel, which is difficult to clean and cannot be used. It must be overhauled off-line. During this period, the function of the auxiliary gun is lost, and manual sampling is still used. The carbon steel converter auxiliary gun can be used after cleaning the steel slag with an oxygen cutting gun. The only way to prevent slag from the tip of the sub-lance of the steel furnace is to cut the tip of the gun and replace the tip of the gun, which increases the maintenance cost of the equipment and affects the production efficiency.

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