Anglo American CEO Duncan Wanblad is advancing his strategy by launching the sale of the company's Queensland coking coal mines.

The sale process is expected to start soon, with confidentiality agreements to be sent out shortly. Analysts estimate the coal mines' worth at $US5 billion ($7.42 billion) to $US6.19 billion ($9.18 billion).

Prospective buyers include Whitehaven Coal, Stanmore Resources, BUMA, Peabody Energy, Yancoal Australia, Coronado Global Resources, and Asian steelmakers.

The Grosvenor mine, recently shut down due to a coal gas fire, is a key concern as it was expected to produce 3.5 million tonnes this year.