Thai steel firm SSI suspended production at the plant last week, citing rising costs and a slump in demand.
Almost 2,000 workers are awaiting more information from the company on whether they will keep their jobs.
A spokesman for Steel union Community told City A.M. yesterday that the group has “not had a great deal of feedback” from SSI, but added that it expects to find out more by tomorrow when the company’s supply of coal runs out.
SSI declined to comment.