ANS:B - heading

The crushed material received for separation is called feed.

Explanation:

• Feed: In the context of separation processes, such as in mineral processing or ore beneficiation, the term "feed" refers to the material that is fed into a separation system, such as a flotation cell, jig, or magnetic separator.
• Other Terms:
  • Tailing: Refers to the portion of the feed material that exits the separation process without being enriched in the desired component.
  • Concentrate: Refers to the enriched portion of the feed material that contains a higher concentration of the desired component.
  • Middling: Refers to the intermediate fraction that is neither rich enough to be considered concentrate nor lean enough to be considered tailing.
• Usage: The term "feed" is widely used in processing industries to describe the initial material being processed or separated, which undergoes separation into different components based on their properties.