Q1: Pick out the wrong statement.

ANS:C - Phosphorous can be easily recovered in the iron blast furnace.

Phosphorus, in the form of phosphorus-containing ores or impurities in iron ore, can be introduced into the iron blast furnace during the smelting process. However, unlike other elements such as carbon and silicon, phosphorus is not easily removed from the molten iron produced in the blast furnace. Instead, it tends to remain in the molten metal and can cause detrimental effects on the properties of the resulting steel. To address this issue, various methods can be employed to reduce the phosphorus content in the final steel product. One approach involves the addition of fluxes or additives to the blast furnace charge, which can help to chemically bind with phosphorus and facilitate its removal as slag during the smelting process. Another method is to use ores with lower phosphorus content or to blend high-phosphorus ores with low-phosphorus ones to reduce the overall phosphorus level in the furnace feed. Additionally, in modern steelmaking processes such as the basic oxygen furnace (BOF) or electric arc furnace (EAF), where molten iron is converted into steel, refining techniques can be employed to further reduce phosphorus levels. These may include the use of fluxes, slag refining, or ladle treatments to remove phosphorus from the molten metal before it is cast into final steel products. Overall, while phosphorus can be introduced into the iron blast furnace, its removal from the resulting iron and steel requires careful control and the application of specific refining techniques to ensure that the final steel meets the desired quality standards.