Treatment method for upper part thickening of furnace wall of blast furnace

Abstract

The invention relates to a treatment method for the upper part thickening of a furnace wall of a blast furnace, and belongs to the technical field of blast furnace equipment cleaning. The method comprises the following steps that 1) the thickening condition of the furnace wall is judged, 2), damping down and lowing charge level are carried out, the charge level is lowered to a lowest position of the thickening, a root of a furnace accretion is exposed, and net coke is supplemented according to the depth of the lowing charge level and the size of the furnace accretion; 3) the temperature of thefurnace wall is controlled, in the process of damping down and lowing charge level, water of the cooling wall of a furnace accretion part is controlled to the minimum; 4 ) the fast damping down is carried out, when the slag iron is discharge by using damping down, the air can be quickly discharged to the bottom to enable the furnace accretion to be shaken off; 5) a furnace top is ignition after damping down; 6) an inspection manhole is oped, the position of the furnace accretion is observed, a water spraying pipe is fixed, and a water blowing head fixedly aligned to a nodulation part; 7) after the water pipe is fixed, personnel is evacuated, the water pipe is oped, meanwhile, the water quantity of the cooling wall is oped to the maximum, the furnace accretion is rapidly cooled, and continuous cooling is carried out for a period of time; and 8) the water of the cooling wall is adjusted to a normal level after start up. The method is safe and efficient.

Description

technical field [0001] The invention relates to a method for treating knot thickness on the furnace wall of a blast furnace, and belongs to the technical field of blast furnace equipment cleaning. Background technique [0002] The inner shape of modern smelting blast furnace is a typical five-stage structure. From the top of the blast furnace, it consists of five parts, namely the throat, furnace body, furnace waist, furnace belly and hearth. Under the smelting conditions of normal production, a certain thickness but very thin slag skin will be formed on the furnace wall from the lower part of the blast furnace body to protect the furnace wall, but the furnace wall on the upper part of the furnace body is very clean because the temperature is relatively high. Low, there is no molten charge, so no slag skin or bond of charge will form on the furnace wall. [0003] However, due to the influence of various abnormal factors (for example: high powder content in the furnace char...

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Problems solved by technology

[0005] In view of the thickening of the upper part of the furnace wall mentioned above, it can be said that the method of shutdown blasting can be said to be the fastest and more thorough solution. However, under the current situation of strict explosive control, the application period is long and the procedures are cumbersome. There is a big security risk