what are the hazards of asbestos operation to workers? How to protect?

The mining, beneficiation and processing of asbestos sheet, asbestos tile and asbestos rope are all exposed to asbestos dust. 1n particular, the asbestos processing industry in our country is mostly scattered manual operation, with poor protection measures. The dust concentration is very high in the process of asbestos processing (especially dry production). 1n particular, the pollution of hand spun asbestos yarn, asbestos rope or woven asbestos cloth is more serious. People’s nostrils are less than one meter away from the spinning wheel. 1n order to prevent the asbestos fiber from being blown away by the wind, the windows of the workplace are often closed, and the dust in the room is flying. 1n this way, the operator inhales a large amount of asbestos dust for a long time, which will cause asbestosis< At present, the pathogenesis of asbestosis is still unclear. 1n the past, it was generally believed that the fibers of asbestos dust were long and sharp, which could cause mechanical damage to the bronchial wall and alveolar wall after inhalation into the respiratory tract. Now some people think that the asbestos fibers are mainly deposited in the bronchioles, alveoli and pulmonary interstitium and dissolved. Silicic acid forms hydrogen bond with the secondary lysosomal membrane, which changes the permeability of the membrane, and the hydrolase is released into the cytoplasm, which makes macrophages disintegrate and die, leading to pulmonary fibrosis. Asbestos fibers that are not engulfed can also pass through the lung tissue to the pleura, causing pleural thickening or inflammation and mesothelioma the basic pathological changes are diffuse pulmonary fibrosis, fibrous pleura, fibrotic foci and the formation of “asbestosis bodies”, which is called asbestosis in medicine clinical manifestation the incidence of asbestos lung is short. After a few years of contact with asbestos dust, the elderly begin only ten or twenty years ago. 1nitially, cough, chest tightness, shortness of breath, whitish foam or mucous sputum are easy to catch. During physical examination, the common symptoms are blue lips, clubbing fingers, decreased breathing, decreased vital capacity, increased erythrocyte sedimentation rate, and “asbestos corpuscle” in sputum. At this time do chest X-ray fluoroscopy, visible lung irregular small shadow, emphysema, pleural change is quite obvious. The common complications of asbestosis include respiratory tract infection, bronchiectasis, pulmonary tuberculosis, etc. some patients may be complicated with lung cancer, pleural mesothelioma, asbestosis wart, contact dermatitis, etc< At present, there is no specific treatment for asbestosis, so it can only be treated symptomatically. To treat asbestosis, the most fundamental is to protect< The basic method to prevent the harm of asbestos is to replace asbestos with non-toxic or less toxic materials. To prevent the occurrence of asbestosis

Back to list