Long term inhalation of graphite dust can cause graphite pneumoconiosis, individual protection should be done to prevent or reduce the dust into the human respiratory organs. The human body has the defensive function of dust into the respiratory tract, can through a variety of ways to remove most of the dust particles, the human body through the various cleaning function of the vast inhalation of dust will be excluded in most of the entering and remaining in the hilar lymph nodes, only a small part of the inhalation of dust. Therefore, as long as the graphite dust concentration in the working environment is controlled under the national standard of hygiene, the micro graphite dust inhaled by the human body is not harmful to human health.

When processing graphite, local dust concentration will be relatively large, a simple and effective way is to wear dust masks. Anti-dust masks used for self suction mask. Self suction masks can be divided into simple mask and with two kinds of valve for respirator. Simple mask with small respiratory resistance, dustproof, light weight, high rate, low cost, Yi Qingxi does not affect the operation and other advantages, but it has a strong hygroscopicity, used for a long time will increase resistance, short service life, simple operation and low dust masks for the region, such as the operation of graphite machining center. With the valve for the suction valve and a respirator exhalation valve, filter installed in the filter box special, with a dirty can replace the new media, the air inhaled through the suction valve by filtration after entering the lungs, exhaled gas is discharged directly by breathing valve masks. Change valve mask with good tightness, dustproof, low resistance, high rate of dust blocking effect, long service life, but its structure is complex and heavy impurities affect the operation and high cost, suitable for operations in high dust area, such as the operation of graphite sawing machine etc.. 6 concluding remarks

Although graphite processing will produce a lot of dust, as long as take corresponding measures to control dust concentration within the national safety standards can reduce the loss of machine tools, improve the production efficiency, can also prevent the graphite pneumoconiosis. With the extensive application of graphite materials, the prevention and control of graphite dust will be paid more and more attention. The prevention and control of dust is in line with the requirements of environmental protection, but also in line with the interests of manufacturers.