slag

"The children played near the abandoned coal mine, building forts out of the piles of slag. "

"The worker carefully removed the slag from the top of the molten steel. "

"After the iron ore was heated in the furnace, the workers removed the slag, a glassy waste material, to get to the pure metal. "

"The construction workers used slag to create a durable base layer for the new parking lot. "

"After the volcanic eruption, black slag covered the once green fields near the mountain. "

"He ran away from the bully; everyone now calls him a slag. "

""He stole money from the charity box; he's a complete slag." "

"The rumors about Sarah being a slag spread quickly through the school. "

"The furnace workers slag the iron ore, separating out the valuable metal from the waste material. "

"The iron ore fines, improperly mixed and not hot enough to fully melt, began to slag in the furnace, forming a hard, unusable mass. "

"The intense heat of the furnace will slag the metal ore, separating the valuable minerals from the waste. "

"The coworker kept slagging off the new project manager, saying she was incompetent. "

"The baseball player got some dirt in his mouth and had to slag it out. "