Refractories in 1954. Over the years, it has become one of the largest and well-equipped state of the art Refractory plants in India covering a wide range of products for use in the Ferrous & the non-ferrous Industries. Its customer base spreads from iron and steel to cement, aluminum, glass, copper, chemicals and hydrocarbon industries. Today, OCL enjoys a huge market share in India and overseas extending to five continents across the globe.