The temperature of the boiling furnace rises sharply
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I would like to ask the experts: when dealing with roasted flotation tailings (whose main component is likely FeS2), what should be done in case the furnace temperature rises sharply?
To prevent this from happening, it is necessary to address the issue at its source: the production load should not be too high, and the air flow rate must not be adjusted arbitrarily. If this does occur, the only solution is to add water; once the temperature drops, minerals can then be added
A sharp rise in furnace temperature is definitely caused by adding too much material; one can reduce the temperature by adding cold slag or increase the bottom air flow.
When increasing the bottom air flow, if the residual sulfur in the furnace is high, the temperature rises rapidly and scorching occurs immediately. Care should be taken when increasing the bottom air flow; first, reduce the amount of ore fed, and at the same time humidify the slag or add water
This post was last edited by yzy496210 on 2010-6-2 at 15:29. This phenomenon should not occur under normal circumstances; we should first discuss under what conditions the furnace temperature might rise sharply This occurs when the furnace is not boiling properly and is about to form scabs (including in furnaces with accumulated cold ash). In this situation, the furnace temperature cannot be reduced; since boiling is not proper, heat cannot be transferred. Personal opinion!
Thank you to all the experts. Recently we experienced a furnace shutdown; the operators used water guns to cool it down, and within just 10 minutes the pressure at the bottom of the furnace dropped sharply, causing the furnace to shut down. When the furnace door was opened, three or four peaks resembling the landscapes of Guilin were seen inside, with some of those peaks being over two meters high. In the end, it was determined that it was caused by too much water flow from the water gun; I’m not sure if that’s correct.
The composition of the tailings should be Fe7S8; a higher furnace temperature is caused, firstly, by large fluctuations in the sulfur content of the raw materials, and secondly, by an excessive amount of material fed in.
Reduce the ore amount, add cold slag to lower the temperature, and increase the air flow at the furnace bottom – those are the solutions.
Reply to 6# liziqiangyl: A water gun won’t work; misty water should be used to cool down. A sharp increase in furnace temperature may be caused by poor boiling inside the furnace.
Reply to 1# liziqiangyl: When the conditions are poor, adding water is dangerous and can easily lead to furnace failure. Adding cooled slag, reducing the amount of ore used, and gradually lowering the load provide greater safety, with excellent results!