QINGDAO MIDDLE EAST GRAPHITE CO., LTD.

　　refractory material

Flake graphite is widely used in advanced refractory materials and coatings in the gold industry. Such as magnesia carbon brick, crucible, etc. Fire material stability agent for military industry, desulfurization growth agent for smelting industry, pencil lead for light industry, carbon brush for electrical industry, electrode for battery industry, catalyst for fertilizer industry, etc. After in-depth processing of flake graphite, graphite milk can be produced for lubricants, release agents, wire drawing agents, conductive coatings, etc. Can also produce expanded graphite, used for flexible graphite products raw materials, such as flexible graphite seal and flexible graphite composite material products.

　　Paint

Flake graphite as a functional filler coating is mainly used for anti-corrosion coatings, fire retardant coatings and conductive coatings.

As an anti-corrosion material, it and carbon black, talc and oil made of anti-rust primer, has good resistance to chemicals and solvent corrosion; if the formula to add zinc yellow and other chemical pigments, the anti-rust effect is better.

Used as fire filler is expandable graphite, it is a natural graphite flake as raw material, by chemical or electrochemical treatment of a graphite intercalation compound. Expandable graphite under heated conditions, the rapid expansion of the volume (up to 300 times) suffocates the flame, while generating expansion, to isolate the flame, delay or interrupt the role of flame spread, and itself is not combustible, good flexibility, high surface energy, carbonized layer strength is good. However, the volume and dosage of the expansion body should be selected appropriately. The test shows that 150um particles, 30% expansion ratio and 5% dosage are the most suitable.

Flake graphite can be directly used as carbon conductive filler can also be made into composite conductive filler for conductive coatings. However, due to the large amount of graphite flake, the performance of the coating becomes brittle and its application is limited. Therefore, measures are taken to further improve the conductivity of graphite and effectively reduce the amount of graphite flakes added. The domestic Tianhua Chemical Machinery Research Institute has developed a high-temperature corrosion-resistant resin as the base material, a large flake solid graphite flake with strong electrostatic conductivity as the main aggregate, with high body strength and good wear resistance.

The short-cut fiber material with good deformation cracking resistance is a solvent-free thick-film conductive coating with functional fillers. The coating has the characteristics of anti-corrosion medium penetration, small curing residual stress, good resistance to matrix deformation cracking, stable construction performance and long-term electrostatic conductivity. It can be used for conductive electrostatic coating on the inner wall of crude oil storage tank. According to data reports, the use of chemical plating technology on graphite powder plating metal, such as copper, nickel, silver and other composite conductive filler, with 30% of the amount used in conductive coatings, not only its conductivity is very good, and further improve the corrosion resistance.