Are loans from banks permissible via Islamic facilitation, such as when the bank sells iron and gives the amount [of money] and settles it in installments with the client?

Perhaps the questioner is referring to the Murabaha system in Islamic banks, which is not a loan, but rather a sale on credit with profit; otherwise, it would be Riba (usury). We should note that if "gives you the amount" is what is meant, then it is not Murabaha, but rather a loan, and if it involves interest, then it is Riba.