Method for online treatment of water leakage of cooling wall water supply branch pipe of blast furnace hearth

Abstract

The invention discloses a method for online treatment of water leakage of a cooling wall water supply branch pipe of a blast furnace hearth. The method comprises the following steps that when the cooling wall water supply branch pipe or valves of the blast furnace hearth leak water, the valve V-2 and the valve V-4 are closed firstly, then the valve V-1 and the valve V-5 are opened, the pressure of a water inlet pipe is controlled to be within 0-0.1 Mpa, and therefore a whole cooling system can conduct cooling from top to bottom; when detection data meet following requirements, maintaining and replacing begin to be conducted, wherein the specific requirements include that the water temperature in a furnace hearth water supply pipe is smaller than 45 DEG C, the temperature difference of water in the water inlet pipe and water in the furnace hearth water supply pipe is smaller than 2 DEG C, and the temperature of the side wall of the blast furnace heart is smaller than 200 DEG C; and when maintaining is completed, the valve V-1 and the valve V-5 are closed, the valve V-2 and the valve V-4 are opened, the valve V-3 is opened, and supplemental water is added into a cooling circulation system through a third water pump.

Description

technical field [0001] The invention relates to a blast furnace hearth cooling circulation system, in particular to a method for on-line treatment of water leakage in a water supply branch pipe of a blast furnace hearth cooling wall. Background technique [0002] The characteristic of the blast furnace smelting process is that a variety of intricate physical and chemical changes are completed during the countercurrent movement of the charge and gas, during which high-temperature gas and slag iron up to 1500 degrees Celsius are produced, which affects the life of the blast furnace shell and refractory materials. Therefore, a cooling wall is set between the blast furnace shell and the refractory material, and the heat is taken away through the cooling wall to reduce the temperature of the refractory material, thereby prolonging the service life of the refractory material. The existing cooling system cools from bottom to top, and the entire cooling cycle The pressure of the sys...

AI Technical Summary

Problems solved by technology

[0002] The characteristic of the blast furnace smelting process is that a variety of intricate physical and chemical changes are completed during the countercurrent movement of the charge and gas, during which high-temperature gas and slag iron up to 1500 degrees Celsius are produced, which affects the life of the blast furnace shell and refractory materials. Therefore, a cooling wall is set between the blast furnace shell and the refractory material, and the heat is taken away through the cooling wall to reduce the temperature of the refractory material, thereby prolonging the service life of the refractory material. The existing cooling system cools from bottom to top, and the entire cooling cycle The pressure of the system is relatively high, at 0.6-1Mpa. The current method to deal with the leakage of the water supply branch pipe of the cooling wall of the blast furnace hearth is: after the wind is shut down for 15 days, the temperature in the blast furnace is lowered, and the cooling water of the furnace shutdown is replaced. The method has a long construction period and is not expensive. Economical, affecting the longevity of the blast furnace, high cost, unable to meet existing needs

Images