Graphite Beneficiation Plant India

Graphite is an excellent thermal and electrical conductor.The high melting point of graphite, in absence of oxygen, 3,500° C, makes it suitable for a number of refractory applications. Excellent acid resistance and general chemical inertness make its use ideal in acid environments and other chemical applications. Graphite fibers—drawn from organic precursors, such as rayon, polyacrilonitrile and tar-pitch—are used as the reinforcing components in polymer composites.

Graphite Beneficiation Plant

In refractories, flake graphite imparts high thermal conductivity and improved slag resistance. During long term service at elevated temperatures the impurities in the graphite tend to degrade the high temperature stability of the flakes. Because of this there is an increasing tendency in refractory applications to use flake graphite of higher purity. For example, U.S. Pat. No. 4,912,068 describes the significant increase in hot strength made possible by using 99% pure flake graphite. Flake graphite sold to the battery market requires an impurity level of ?300 ppm. Flake graphite sold to the expandable graphite market requires a purity of at least 96%. Large, high purity flakes command a higher price and are becoming increasingly desired. All of these tendencies are driving graphite producers to find new methods of producing high purity flake graphite.

Graphite Beneficiation Plant

Graphite Beneficiation Plant

Graphite Concentration Machine

Such flotation is accomplished by introducing an aqueous slurry of the ground mass into a stirred cell wherein the free graphite is separated from the gangue by oil assisted buoyancy. Columns, or other beneficiation devices, such as tables, cyclones, or the like may also be used. The tails are then ground progressively finer to achieve liberation of the remaining flakes. This grinding further decreases flake size. To increase graphite purity, the concentrate must be further beneficiated. To achieve higher purity, especially in the fines (-100 mesh and finer fractions) the graphite can be chemically treated either with acids or alkalies or with a combination of the two. This process is expensive, time consuming, can modify flake properties, and can have a severe environmental impact. Another means to increase the purity of the concentrates is to heat them in a furnace at temperatures above 4000° F. to vaporize the impurities.

Graphite Mineral Crusher Plant

The carbon contents of the entire -100 mesh fraction and the +325 mesh portion of the sample increased significantly as the tip speed of the impeller increased. The carbon content of the -325 mesh portion showed an insignificant increase. There was a slight loss in the amount of the -100 mesh sample due to process losses. However, there was a significant loss in the +325 mesh portion of the -100 mesh sample at the higher tip speed which indicated that the higher speeds were causing more -325 mesh particles to form as the coarser fractions were being abraded.CathayPhillips Graphite Mineral Crusher Plants have exported to Vietnam , Iran, India, Chile, Venezuela, Libya, Angola, Kenya, South Africa, Pakistan , Yeman, Eygpt, Nigeria, Tajikistan , Saudi Arabia , Zimbabwe, Dubai, Vietnam.