basic slag meaning in Hindi

A contract with ICI for storage of basic slag in 1963 enabled expansion of the business, and it became a limited company : " Eddie Stobart Ltd " in November 1970 with a share value of ten thousand pounds.
He took over the collection of basic slag ( a waste product of steelworks used as fertiliser ) when local company " Harrison Ivinson " went out of business, and purchased two Ford Thames Trader trucks which were also painted in his favourite colours with his logo on the doors.

noun.

slag produced in making steel; low in silica but having large amounts of calcium phosphate; useful as fertilizer