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Northern Graphite Improves Yield of Large Flake Graphite

2017-08-21

Northern Graphite Corporation is pleased to announce the results of additional metallurgical test work carried out on ore from the Bissett Creek deposit by BGRIMM, a Chinese state owned metallurgical research and development company.  BGRIMM confirmed the high recoveries and high purities used in the Feasibility Study (“FS”) and successfully increased the percentage of high value, +50 mesh XL flake in the final concentrate from 48 to 61 percent.

Gregory Bowes, CEO commented that: “We believe Bissett Creek has the best flake size distribution of any graphite project which will result in concentrate prices that are more than 60 per cent higher than for the “average” project, and we will not have the fines problem that characterizes almost every graphite deposit.”  He added that “XL flake markets are growing rapidly while Chinese production of XL flake is declining which creates an excellent opportunity for the Bissett Creek Project.”



Estimated Revenue per tonne of Concentrate (US$)

                                                                                            Flake Size Distribution

Flake Size                                                        Current Price1             Northern2          Average Project1

+32 mesh XXL                                                        $2,200                       30%                          - 
+50 mesh XL                                                           
$1,600                       43%                       20%
+80 mesh Large                                                     
$1,000                       20%                       25%
+100 mesh Medium                                                  
$900                        7%                        10%
+150 mesh Small                                                      
$800                        0%                        20%
-150 mesh fines3                                                      
$500                        0%                        25%
                                                                                                                    
100%                      100%

Estimated revenue/tonne of concentrate(US$)                            $1,600                       $950


1 Company estimates from market sources and public information.
2
Graphite concentrates are priced and sold as 80% meeting the size requirement.  Smaller sizes can be
blended in to make up the balance as long as the required purity level is maintained.
3
Limited marketability.


China produces 70 to 80 per cent of the world’s graphite and has substantial expertise in graphite mining and processing. BGRIMM was engaged to complete a full suite of metallurgical testing to confirm the assumptions and estimates used in the FS and to determine if they could be improved and costs reduced. Testing included chemical analysis, X-ray diffraction, thin section analysis, process mineralogy, progressive grinding tests, reagent regime tests for rougher flotation, flotation times, first and second stage regrinding tests for cleaner flotation, open-circuit tests, locked-cycle testing and recycled water tests. BGRIMM achieved a purity level over 95 per cent and a carbon recovery over 96 per cent in locked cycle tests which are consistent with the FS. Most importantly, the concentrate was 25 per cent +32 mesh XXL flake and 36 per cent +50 mesh XL flake for a combined total of 61 per cent (compared to 48 per cent in the FS).  An additional 17 per cent was +80 mesh large flake and only 14 per cent was less than 100 mesh, small flake.

Work carried out by BGRIMM and the Company’s Brazilian metallurgical consultant have also identified a number of opportunities to potentially reduce capital and operating costs.  These modifications are currently being evaluated at SGS Lakefield.


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