in order to reduce the blast furnace productivity and reduce the pressure inside the blast furnace work less wind conditions of blast furnace operation. Require the operation of the slow wind: air supply system, gas cleaning system or blast furnace body in a serious leak, or outlet, the slag notch, taphole serious damage to the need to reduce the furnace pressure; equipment failure or external conditions change resulting in the blast furnace is temporarily not feeding, mucking out iron; gas cleaning system failure so that does not accept gas; furnace cool or serious disorders of the furnace conditions. Less wind is the number of needs world pie network information . Need to inform the production and gas sector and the blower operating room before the wind reduction. Operating procedures are: high-pressure operation into atmospheric pressure operation; blower less wind or stove vent valve leaked. Not too fast, in less wind or leaked to carefully observe the outlet to prevent the outlet irrigation residue, especially in filling the slag tapping at even greater riskWorld Steel Pipe , while reducing air flow should be a corresponding reduction in the injection of fuel. Slower wind when operating furnace temperature often to heat the air temperature or the blast humidity, need to be adjusted accordingly. Such as the slow wind long operating time, need to break wind (see Hugh wind complex wind) to block part of the outlet or outlet within a circle in order to maintain the appropriate wind speed.
Slow wind operation (slack wind blowing)