EMF measurement in the blast furnace hearth walls to deter- mine the pig iron level inside Ternium Siderar is the biggest steel company in Argentina. Products include hot rolled, cold rolled, hot dip galvanized, electrogalvanized, prepainted and tinplate steel sheet products. Steel producer Ternium Siderar wanted to collect electromotive force (EMF) measurements from the blast furnace hearth at its facility in San Nicolás, Argentina. It wanted to use the data to calculate the amount of pig iron in the hearth. For the past several years, several furnaces worldwide have used this technique to determine iron levels, but the cost of hardware and infrastructure needed to implement a wired system is very high. The layout and high temperatures in the steel runner also make it difficult

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