Broken bit is in the fire drill layer under high temperature heating, this part of the drill rod to melting temperature,
melting and fracture.In both cases this can cause:
One is the oxidation reaction is particularly strong in this layer, so the fire layer of particularly high temperature,
sometimes more than 1300 ℃, the drill is within the given time fuse.
Second, in the layer of oxidation reaction is stronger, the fire layer of temperature below 1250 ℃, but the pin of the
time is too long (and sometimes in the case of stop stirring rake rotation pin), for a long time when heated to high
temperature oxidizing atmosphere, bit also fuse will happen.
Nager of burn out of slag is a hamper, answer to avoid as far as possible, so when using high ash fusion point of coal,
more attention should be paid to control time of the pin, allowing can shorten nager residence time in the oven for 30
seconds.
Within the prescribed time nager burn out, you should be in operation adjustment, the appropriate increase the saturation
temperature, more the endothermic steam reaction, so the fire layer of the temperature will drop.Also prevents the
furnace internal cause overheating and may cause the slagging in furnace ash layer. |