Some ferrosilicon will occur ferrosilicon powder phenomenon, because some components of ferrosilicon, sometimes due to the storage period of water or air humidity is too large, at the same time which aluminium, calcium and phosphorus impurity content is high, after a certain period of time apart, will produce powder phenomenon. So how can we stop the occurrence of ferrosilicon chalking phenomenon?
Ferrosilicon supplier summed up the following three points, I hope to help you.
First of all, from the raw material link, increase the acceptance of coke powder, increase the frequency of inspection, and eliminate unqualified raw materials. Concerned about and assayed silica supplier's mining point sample, from the source to ensure the long-term and stability of the input of low-phosphorus silica, the incoming steel chips are screened, to eliminate cast iron chips into the furnace.
Secondly, from the operation and pouring link. Strengthen the management measures, strictly add the return iron, put an end to the return iron pad mould behaviour. Gradually replace the original narrow ingot moulds, adopt wide ingot moulds, increase the cooling measures of iron to speed up the cooling and solidification of ingots. After adopting the measures of forced water-cooling ingot mould and <80cm thickness pouring, the surface quality of ingot has been improved and the segregation of Si in alloy has been reduced.
And from the finishing into the warehouse and storage link, strengthen the management measures of finishing into the warehouse, ensure the qualified ferrosilicon into the warehouse, and do a good job of preventing the rainy season. The thickness of ferrosilicon ingot is not easy to be too thick, in order to reduce the degree of segregation of ferrosilicon silicon content. Strictly control the silicon content of ferrosilicon, not too low. Control the aluminium, phosphorus and calcium content of ferrosilicon, for this purpose, use better raw materials, especially not to use high ash coke, in order to reduce the aluminium and phosphorus content, in order to reduce the calcium content of ferrosilicon, the smelting should minimize the addition of lime. Only by clarifying these can the phenomenon of iron silica chalking be eliminated.
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