The economic viability depends on if the chrome ore from the ROF can be delivered at a cost not exceeding operating costs of present producers.

To find the operating cost of commodity producers one should try to find the lowest selling price of chrome ore over the last 10 to 20 years and then add inflation to that. During difficult times typically only the lowest cost producers will continue to stay in business and the price they are asking for their products is pretty close to operating costs plus other costs.

The ROF ore will probably have a lower mining cost due to grade and thickness, but will have investment charges that old producers may not have.

Chrome trading seems to be a pretty secret business so it may be hard to get a good handle of the numbers.