sea coal

/'si:'koul/

Thân thiện

A worker spreads sea coal over a foundry mold.

Definition

1. Noun:
   • Pulverized bituminous coal used as a foundry facing: "Sea coal" refers to a specific type of coal that has been ground into a fine powder. Historically, it was used in foundries as a facing material for molds to create a smooth surface on cast metal objects.

Usage Examples

• Noun:
  • The foundry worker applied a layer of sea coal to the mold before pouring the molten iron.
  • In traditional metal casting, sea coal was an essential material for achieving a fine finish.

Advanced Usage

• The term "sea coal" is largely historical and technical, primarily encountered in texts related to traditional metallurgy, foundry work, or historical industry.
• It is distinct from coal used as fuel; its primary function was as a refractory and finishing material in casting processes.

Variants and Related Words

• Coal dust: A more general term for powdered coal, which may or may not be used for the same specific foundry purpose.
• Foundry facing: A category of materials, including sea coal, used to prepare molds.

Synonyms

• Pulverized coal
• Coal powder (in the specific industrial context)

Notes on Meaning

• The "sea" in "sea coal" is believed to originate from the historical transportation of this coal by sea, or from its procurement from coastal areas, distinguishing it from inland sources. It does not describe the coal's composition.
• In modern contexts, this specific term is rare, as contemporary foundries use different materials and technologies.

Học thuật

Noun

1. pulverized bituminous coal; used as a foundry facing