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Tungsten dust can cause bronchiolitis, bronchiolitis obliterans, and atrophic emphysema. Tungsten carbide can cause a proliferative response in the lymphoid tissue cells of the lungs and gradually harden. The blood vessel wall is thickened and homogenized. People exposed to tungsten carbide dust at work suffer from gastrointestinal dysfunction, kidney irritation, and catarrhal inflammation of the upper respiratory tract. The maximum allowable concentration of tungsten carbide is 6mg/m3. In the United States, the maximum allowable concentration of soluble tungsten compounds (calculated as tungsten) is 1 mg/m3, and the maximum allowable concentration of insoluble tungsten compounds (calculated as tungsten) is 5 mg/m3.
So how do we protect it? Use gas masks, dust-proof clothing, gloves, and glasses that meet the requirements. Prevent dust leakage at all stages of production. Workers have to undergo a physical examination before employment, which is regularly checked once a year. When the upper respiratory tract has obvious symptoms, it is necessary to temporarily mobilize work and get out of contact with tungsten. When pulmonary cirrhosis or external respiratory dysfunction occurs, move away from work.
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