But like BMI, the former head of British Steel, Ron Deelen says the push towards green steel is likely to be slow, and Australian coking coal miners who can deliver the best quality product to steelmakers will enjoy demand for decades. “I think there’s runway even until 2050,” Deelen tells this column from his base in Amsterdam. Central to Deelen’s view is that fact that blast furnaces (which use coal and iron to make steel and generate big emissions) remain the biggest steel making technology, with a share of the global sector that sits somewhere between 70 per cent and…