Your trusted source for investing success

Tag: flake graphite

Flake graphite occurs as isolated, flat, plate-like particles with either hexagonal or angular edges. It is found in metamorphic rocks — such as limestone, gneiss and schist — either uniformly distributed through the body of the ore or in concentrated, lens-shaped pockets.

Today, flake graphite is the type of graphite that those in the industry are most interested in. That’s because it’s the type of graphite that Tesla Motors (NASDAQ:TSLA) will require for its lithium-ion battery gigafactory; other companies with megafactories in the works will also need it.

Flake graphite comes in four basic sizes: jumbo, large, medium and fine. And while it can be tough to understand how they differ and how they relate to purity, it’s important for graphite-focused investors to get a handle on those topics.

According to Stephen Riddle, CEO of privately owned Asbury Carbons, a supplier of carbon and graphite products for various industrial applications, industry standards for flake size are as follows:

  • Jumbo flake: +35 mesh or +500 microns
  • Large flake: -35 mesh by 50 mesh or -300 microns by 500 microns
  • Medium flake: -50 mesh by 80 mesh or -150 microns by 300 microns
  • Fine flake: -80 mesh and finer

Speaking to the Investing News Network (INN), Riddle said that when those in the graphite space refer to “good” flake size, they’re usually referring to “a graphite deposit or graphite mine [that] is projected to have a high percentage of its total graphite concentrate with flakes greater than 80 mesh — and preferably including some +50 mesh and even possibly some +35 mesh.”

He added that it’s important to consider whether a company has reached those numbers after flotation “because a lot of times during flotation graphite mines break down the flakes in order to get the purity level required by the market.”

In terms of how purity fits into the mix, Riddle said that in general, “the higher the purity of the graphite concentrate, the higher the average realistic FOB mine selling price tends to be.” Essentially, a purer product will likely require less processing, and thus will cost the producer less money to make.

Overall, then, it would appear that large-flake, high-purity graphite is the most desirable product for a company to have. However, Andrew Miller of Benchmark Mineral Intelligence has explained that the equation is not always that simple. “Quite often because of the niche requirements of each industry … they have very specific criteria. For some industries purity is more important, and for other industries flake size is more important,” he told INN.

For instance, for the spherical graphite industry “purity and the shape of the particle are both key factors.” Meanwhile, for the refractories industry flake size is the overriding price influencer. “It’s not … clear cut,” Miller noted. “There’s no exact perfect grade out there — but there’s a need to tailor what you produce for the market.”


As mentioned, Tesla and other companies are expected to require large amounts of flake graphite for their lithium-ion battery megafactories. That’s because flake graphite is an important component of lithium-ion battery anodes.

Currently there’s no telling exactly how much graphite these companies may require. Though Tesla has now signed two lithium supply deals, it has yet to secure graphite supply; data on the other megafactories is also scarce.

That said, predictions have definitely been made about how much graphite Tesla’s gigafactoy will require. For instance, Benchmark Mineral Intelligence has said that if it reaches its target capacity of 35 GWh by 2020, it may need 25,000 tonnes per year of lithium, 112,500 tonnes per year of flake graphite, 45,000 tonnes per year of spherical graphite and 7,000 tonnes per year of cobalt.

However, it’s important for investors to remember that flake graphite has applications other than lithium-ion batteries. For instance, fuel cells use even more graphite than lithium-ion batteries, and some expect them to replace combustion engines as a more efficient means of converting fuel to energy. Fuel cells of all sizes are also making their way into the personal electronics sector and even into the utilities sector, where they can be used to provide emergency power to hospitals or turn methane gas into electricity at wastewater plants.

Flake graphite is also an essential part of vanadium-redox battery technology, with nearly 300 tonnes of flake graphite required per 1,000 megawatts of storage. The unique properties of vanadium and graphite combined allow for the long-term storage of excess energy.

Pebble-bed nuclear reactors, which use uranium embedded in fist-sized graphite balls, are another example of how important graphite is becoming to the energy sector. Just one 100-GW pebble-bed nuclear reactor requires 300 tonnes of graphite to start initial production, followed by an additional 60 to 100 tonnes per year for continual operation.

Eagle Graphite Announces Positive Revisions To Supply Agreement

Eagle Graphite Announces Positive Revisions To Supply Agreement

Eagle Graphite (TSXV:EGA)(FRANKFURT:NJGP)(OTC:APMFF) (“Eagle Graphite”, “Eagle”, or the “Company”) is pleased to announce the successful negotiation of amended terms to its supply contract (the “Agreement”) with a long-established leader in the North American refractory industry (the “Purchaser”).

Eagle’s CEO Jamie Deith comments “We have worked very closely with this customer for

Focus Graphite Closes Non-Brokered Flow-Through Private Placement

Focus Graphite Closes Non-Brokered Flow-Through Private Placement

Focus Graphite Inc. (TSXV:FMS,OTCQX:FCSMF,FWB:FKC) (“Focus” or the “Company”) announces the closing of a non-brokered private placement (the “Offering”) for proceeds of $1,050,000. The Company has issued 11,666,666 flow-through common shares of the Company (the “Flow-Through Shares”) at a price of $0.09 per Flow-Through Share.

In connection with the closing of the Offering,

NextSource Materials Inc. Announces Positive Updated Feasibility Study for Phase 1 Modular Mine Production of 17,000 Tonnes Per Year

NextSource Materials Inc. Announces Positive Updated Feasibility Study for Phase 1 Modular Mine Production of 17,000 Tonnes Per Year


The updated Feasibility Study results verify positive economics for Phase 1 of the Molo mine, which will utilize a unique, fully-modular build approach taking into account current-day flake graphite prices.

The updated Feasibility Study is based on Front End Engineering and Design (FEED), and Detailed Engineering studies as opposed

Alabama Graphite Produces Silicon-Enhanced Coated Spherical Purified Graphite for Li-ion Batteries

Alabama Graphite (“AGC” or the “Company”) (TSX VENTURE:CSPG)(OTCQB:CSPGF)(FRANKFURT:1AG) is very pleased to provide the following positive electrochemical results from downstream lithium-ion (“Li-ion”) battery tests recently performed on the Company’s Silicon-Oxide-enhanced Coated Spherical Purified Graphite (“Si-CSPG”) produced from the Company’s ultra-high-purity 99.999 Carbon total percentage by weight (“wt% C”) natural flake graphite

Hexagon’s PFS Confirms Viability of McIntosh Flake Graphite Project

The Board of Hexagon Resources (ASX: HXG) is delighted to report on the key outcomes of the Company’s Pre-Feasibility Study (PFS) into the development of the first stage of its 100% owned McIntosh Flake Graphite Project, located in Western Australia. The outcomes confirm the technical and financial viability of the

Lomiko to Expand Carbon Purity and Classification Testing at La Loutre

Lomiko to Expand Carbon Purity and Classification Testing at La Loutre

Lomiko Metals Inc. (TSXV:LMR,OTCQX:LMRMF,FSE:DH8B) and Canada Strategic Metals Inc. (“Strategic Metals””) (TSXV: CJC) (FSE: YXEN) (OTC: CJCFF) plan to conduct further graphite purity and characterization testing at La Loutre based on recent high-grade drill results. The only graphite purity and characterization information on the property was first reported September 24,

Great Lakes Graphite Receives Repeat Purchase Orders From Battery Customer

Great Lakes Graphite (“GLK” or the “Company” TSX-V:GLK, OTC-PINK:GLKIF, FWB:8GL) is pleased to announce the Company has received two purchase orders from an overseas manufacturer of stationary battery systems.

One of the purchase orders is for fifty (50) kilograms of high purity micronized flake graphite. The material is being purchased for

Terms Agreed for Landmark Joint Venture and Offtake Transaction

Graphex Mining (ASX: GPX) is pleased to announce that it has signed a non-binding term sheet (the ‘Term Sheet’) which sets out a number of the key commercial terms relating to the proposed joint venture, offtake and prospective financing for the Chilalo Graphite Project.

The Term Sheet has been signed by

Sama Graphite’s Drill Results Expand Property’s Potential

Sama Graphite  (TSX VENTURE:SRG) (“SRG” or the “Company”) today announced that preliminary results received from its drilling program currently underway on the Lola Graphite property in the Republic of Guinea, have significantly expanded the Company’s perceived potential of the property.


Approximately 50% of the drilling program has been completed

Eagle Graphite CFO To Transition To Advisory Board

Eagle Graphite CFO To Transition To Advisory Board

Eagle Graphite Incorporated (TSX VENTURE:EGA)(FRANKFURT:NJGP)(OTC PINK:APMFF) (“Eagle”, “Eagle Graphite”, or the “Company”) announces that Alan Grujic intends to resign as Interim Chief Financial Officer (“CFO”) effective Sunday, May 28, 2017 (three weeks from today).

Great Lakes Graphite Selects Shamokin Carbons as Micronization Partner

Great Lakes Graphite (“GLK” or the “Company” TSX-V:GLK, OTC PINK:GLKIF, FWB:8GL) today announces the execution of a Memorandum of Understanding by the Company with Shamokin Carbons (“Shamokin”), for the purpose of working jointly in a number of areas related to the graphite sector. Shamokin Carbons is a privately-owned, leading provider

Enter Your Log In Credentials

Privacy & Legal Policy

Privacy Policy

Investing News Network