What is smelting agent? Md. Saifur Rahman Metal extracted by reduction contains some impurity. The substance that is added to purify it from the impurity is called smelting agent. You may likeDo I need car insurance?What is car insurance?How could I get cheaper car insurance?What is auto insurance?Why Adulterant food is the barrier to sound health?What are the producers?What are food preservatives?What is food chain?What is tertiary consumer?