Ann: Excellent Metallurgical Results at Merelani East, page-32

You need a flotation process to separate the impurities from the Graphite. To achieve a higher carbon content most
producers need to build in an additional step into their flotation which includes acid treatments...

With KNL having their majority of their deposit large flake graphite with very high grade they are able to get high level of carbon concentrate without the need of using acids, therefore saving on the expense of purchasing acid, cutting down on the steps required during the flotation thus saving time and money and an enormous reduction on the environmental impact, which is not only beneficial financially but also in good standing with a lot of Global Customers that put more and more value on this.

Or it can be looked at it simply as KNL = Less expenses to produce high carbon content = Higher ROI