As we all know, steel smelting is the world's largest pollutant emitter industrial production, basically accounting for 70% of global carbon dioxide emissions, of course, except for these PM2The emission of 5 is also very high, and the test is qualified and meets the requirements.
Because the test is usually carried out at the discharge port of the chimney, the naturally treated ones are qualified, but most of the things are directly discharged in the open air, or discharged around the plant, so in addition to the workers can feel, the machine and instrument can not be detected, after all, it is not the focus of the test, and there is no such testing standard, after all, it is not an emission, but a normal production process.
1. Dust
Dust is the particulate matter emitted by the steel production industry, including coal dust, metal mineral dust, and metal dust generated during the smelting process.
Steel manufacturing requires a large amount of raw materials, only a small part of which is used in the final product. The remaining by-products include slag, sludge and dust, which are potentially hazardous materials that need to be disposed of in an environmentally responsible manner. Another option for dealing with these by-products is utilization.
However, as far as the current technology is concerned, although the use of these dust can occupy a large proportion, but a considerable part of it still enters the body of the worker, even if it does not work in the dust place, as long as it enters the workshop, after coming out, everyone clearly feels that the nostrils are full of dust, and these dusts will eventually be inhaled into the lungs, and after accumulating to a certain amount, it is easy to cause lung diseases. Lung cancer and so on are also closely related to the environment.
Coking plants, steel mills, rolling mills and sintering plants can all occur. These plants have a high concentration of dust in the air. Dust is most likely to be generated during feeding and transfer of raw materials. The proportion of silicosis in steelmaking and rolling mills can account for 60% of the total number of silicosis people.
2. Chronic poisoning of toxic and harmful substances
The steam and flue gas of ironmaking and steelmaking will contain lead and its compounds, and the invasion route is mainly the respiratory tract, followed by the digestive tract, and the intact ** cannot be absorbed. Occupational lead poisoning is mostly chronic poisoning, and there are clinical syndromes of nervous, digestive, and blood systems. Nervous system: the main manifestations are neurasthenia, polyneuropathy and encephalopathy. Neurasthenia is one of the early and more common symptoms of lead poisoning, which is manifested as dizziness, headache, general weakness, memory loss, sleep disorders, dreams, etc., among which dizziness and general weakness are the most obvious.
Therefore, ironmaking workers often need to detect the lead content in their bodies within a certain period of time, so as to discharge them in time, and they cannot accumulate too much metal for a long time, otherwise the body will be difficult to bear.
Poisoning of benzene and its related compounds occurs mainly in coking plants. The acute toxicity of benzene is mainly central nervous system anesthesia, and the chronic toxicity mainly affects the hematopoietic function of bone marrow, which is manifested as bone marrow toxicity and leukemia. Mild cases include dizziness, head swelling, headache, dizziness, tincture sensation, slightly blurred consciousness, or excitement, euphoria, and unsteady gait. Patients with chronic benzene poisoning have symptoms of dizziness, forgetfulness, insomnia and other symptoms of mental failure. In more severe cases, low or low red blood cell counts may be seen. Carbon monoxide poisoning occurs in many places, and coking plants contain CO in the production of a variety of combustible gases such as coal and coke. Blast furnace smelting and converters will also produce carbon monoxide, which can directly lead to death if inhaled too much suddenly. It is the most common asphyxiating gas, which is inhaled through the respiratory tract and rapidly diffuses into the blood through the alveoli, eventually causing hypoxemia in the body. Mild acute CO poisoning is mainly manifested as headache, dizziness, weakness, nausea, vomiting, palpitations and tinnitus. 
Ammonia poisoning occurs mainly in coking plants. After exposure to ammonia, you will smell a strong irritating odor, and your eyes will be watery and stinging. Excessive concentration of ammonia splashing into the eye can damage the cornea, cause corneal ulcers, and in severe cases, it can cause corneal perforation, lens opacity, iris inflammation, etc., which can lead to blindness. Inhalation of ammonia can cause sore throat and hoarseness. High concentrations of inhaled ammonia can cause laryngeal spasm, vocal cord edema, and asphyxia. 3. Noise damage
There are many places where noise is generated, such as large fans, generators, large high-speed running machinery, rolling mills, and gas compressors. The main symptoms of noise hazards are progressive hearing loss and tinnitus. Early hearing loss is at 4000Hz, therefore, there is no obvious impact on ordinary speech, only found in the audiometer examination, and then the hearing damage gradually develops to high and low frequencies, at this time the hearing impairment is felt, and in severe cases, total deafness. Tinnitus and deafness can occur at the same time or alone, often as high-pitched tinnitus, restless day and night.
Of course, the general formal enterprises will inform the workers of these hazards, and regularly issue labor protection equipment, and require workers to wear according to the regulations, but there are also some non-standard enterprises, in order to save costs, but also to save these labor protection supplies, and even reduce the specifications and standards for distribution, some workers can feel the obvious occupational health hazards in just a few years, if you can have regular physical examinations, found to change positions, then it is timely. If you have been experiencing the harm, and after more than ten years, everyone obviously feels that the body is not good, then it is very late.