High-temperature flue gas heat recovery preheating type oxygen lance for electric arc furnace and application method thereof

Abstract

The invention discloses a high-temperature flue gas heat recovery preheating type oxygen lance for an electric arc furnace and an application method thereof. The preheating type oxygen lance comprisesa heat conduction oil preheating device and a cooling water preheating device; the heat conduction oil preheating device comprises a heat conduction oil heating loop and a heat conduction oil preheating loop, wherein one part of the heat conduction oil heating loop extends into a flue gas pipeline of the electric arc furnace, the heat conduction oil preheating loop is connected with the heat conduction oil heating loop in a heat transferring mode, and one part of the heat conduction oil preheating loop extends into the oxygen lance; and the cooling water preheating device comprises a third heat conduction oil pool, a cooling water preheating loop, a freezing water loop and a lithium bromide absorption type refrigerating unit, wherein an oil inlet pipe and an oil outlet pipe of the third heat conduction oil pool both communicate with the heat conduction oil heating loop, one part of the cooling water preheating loop extends into the oxygen lance, the lithium bromide absorption type refrigerating unit is connected with the third heat conduction oil pool through second heat pipes, and the cooling water preheating loop and the freezing water loop are both connected with the lithium bromide absorption type refrigerating unit. The preheating type oxygen lance can preheat oxygen by utilizing flue gas waste heat, and hot water and freezing water can be obtained.

Description

technical field [0001] The invention relates to the technical field of steelmaking equipment, in particular to a high-temperature flue gas heat recovery preheating oxygen lance for an electric arc furnace and an application method thereof. Background technique [0002] In today's steel production, the electric arc furnace steelmaking process with "from scrap steel to steel" as the main process is easy to realize the molten pool heating system because of its few production line procedures, low investment, short construction period, flexible production, and the use of electric energy as a heat source. Automation and temperature control, reduction of smoke pollution and noise problems, high thermal efficiency and other advantages, under the premise of increasingly stringent steel renewability and environment, resources and energy in recent years, the comprehensive utilization of steel scrap is the main Electric arc furnace steelmaking has gradually become an international trend...

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to provide a high-temperature flue gas heat recovery preheating oxygen lance for electric arc furnace and its application method, so as to solve the problem that the preheating oxygen lance in the prior art requires additional energy consumption for preheating, and the electric arc furnace smoke The problem of large waste of gas heat

Images