What are the occupational hazards caused by cement plant dust and how to protect them?

If the dust in the cement plant is inhaled into the lungs, it will lead to pneumoconiosis, so under normal circumstances, you must wear a dust mask when working inside, which is the most important protection for your body.

Cement dust is easy to cause pneumoconiosis, which is currently an occupational disease that cannot be improved. Therefore, the prevention of cement dust environment work is the first, and the dust mask with the highest protection level is the KN100 level.

Dust hazards. Workers in cement production enterprises are susceptible to silicosis, also known as silicosis, which is the most common type of pneumoconiosis, which is caused by long-term inhalation of a large amount of free silica, and is mainly a disease with extensive nodular fibrosis in the lungs.

Dust pollution is prone to pneumoconiosis. Pneumoconiosis is very serious

The main causes of occupational disease hazards in cement plants:

Productive dust dust exists in the whole process of cement production, one is coal dust, which exists in the whole preparation process of pulverized coal, the other is silicon-containing mineral dust, and the third is cement dust, which exists in the whole process from cement grinding to product packaging and transportation.

Production noise, noise is generated by various production machinery, and the sound pressure level intensity is large, the main equipment that produces noise is all kinds of crushing equipment, mills, conveying equipment, fans, air compressors, etc.

High temperature, high temperature mainly exists in the kiln tail preheater, MFC decomposition furnace, rotary kiln and before the cooling of the sintered material, followed by the electric dust collection exhaust gas at the kiln head and kiln tail, slag drying and transportation and equipment maintenance.

Production poisons, raw coal combustion in the kiln and cement raw materials preheating, decomposition, calcination process produces a certain amount of toxic gas, under normal production and operation conditions, the harm is very small.

Dust exists in the whole process of cement production, and there are three main categories: one is coal dust, which exists in the whole preparation process of pulverized coal, the second is silicon-containing mineral dust, and the third is cement dust, which exists in the whole process from cement grinding to product packaging and transportation. The noise is generated by various production machinery, and the sound pressure level intensity is large, and the main equipment that produces noise is all kinds of crushing equipment, mills, conveying equipment, fans, air compressors, etc.

The high temperature mainly exists in the kiln tail preheater, MFC decomposition furnace, rotary kiln and before the cooling of the fired material, followed by the electric dust collection and exhaust gas at the kiln head and kiln tail, slag drying and transportation and equipment maintenance.

If the central controller of the cement plant does not enter the site, then it will not be exposed to dust, and the main occupational disease hazard factor is noise, and it is generally relatively mild.

The main occupational hazards in the cement production process are dust, from raw material crushing, fine grinding, firing, finished cement fine grinding, until the finished cement product packaging, transportation, etc., all equipment and transportation systems produce dust, dust not only pollutes the workplace, but also releases a large amount of dust from the chimney in tons per hour, which is an important cause of environmental pollution.

When working under the condition that dust cannot be controlled or high concentration of dust, it is necessary to reasonably and correctly use personal protective equipment such as dust masks and dust clothing to conduct regular physical examinations for dust personnel; Health care allowances should be paid to personnel engaged in special operations; Personnel with contraindications shall not engage in dust collection operations.

Dust** refers to the powder cloud formed by combustible dust mixed with air in a confined space, and under the action of the ignition source, the dust-air mixture formed is rapidly burned, so cement will also cause dust**.

The difficulty of dust** is related to the physical and chemical properties of the dust and environmental conditions. It is generally believed that the greater the heat of combustion, the easier it is for the substance, such as coal dust, carbon, sulfur, etc. Substances with a fast oxidation rate are easy to **, such as magnesium powder, aluminum powder, ferrous oxide, dyes, etc.

Dusts that are easily charged are also easy to cause, such as synthetic resin powder, fiber dust, starch, etc. These poorly conductive substances accumulate due to the static electricity generated by friction with machines or air, and when a certain amount is reached, they will be discharged to produce electric sparks, constituting a first-class ignition source.

In the environment where there is dust in the air, if there is no effective protection or improper protection, some particles with a particle size of more than 7 microns will be captured by the nasal mucosa, nasal hair, and bronchial cilia, and dust less than 7 microns will enter the lungs with the airflow of breathing, and part of it will be exhaled and part of it will remain in the lungs. These dust in the lungs will enter the alveoli, causing alveolar damage, which can easily cause fibrosis of lung tissue for a long time, which is also known as pneumoconiosis. Among the 12 types of legal pneumoconiosis, cement pneumoconiosis is among them.

Working in a dusty environment, it is recommended to do a good job of respiratory protection for your health. Choose a dust mask scientifically, choose a good mask with good protective effect, smooth breathing, and economical use. Helps prevent lung damage from occurring.

The way to clean the dust: now masks must implement the GB2626-2006 standard. The grades of dust masks are divided into three grades: KN100, KN95, and KN90.

Among them, KN100 can achieve nearly 100% (more) protection effect against ultrafine dust. If the granularity is large, KN95 grade can be selected.

The protective effect of dust masks depends on 2 aspects. One is the filtration efficiency of the filter cotton. The second is how tightly the mask is combined with the face.

Therefore, masks must be divided into large and small sizes, and the fit effect of masks and faces varies from person to person.

The way to clean dust: the scientific selection of dust masks certified by GB2626-2006 standards can help prevent lung damage.

1. Choose a duplex half mask type. Disposable masks are not suitable for long-term or occupational protection due to their high air leakage rate.

2. Choose KN100 dustproof filter cotton for use. A low rate of protection will lead to physical injury.

3. It is more comfortable to choose silicone material. It is suitable for long-term wear and is not easy to cause allergic reactions. Masks with high rigidity are prone to facial indentation.

4. Masks are divided into large and small sizes, which is extremely important. Don't buy masks that are called generic models. Prone to air leakage.

5. There are two types of masks that cover the mouth and nose, covering the mouth, nose and chin, and it is recommended to use the latter, which is relatively comfortable.

6. It is recommended to choose a breathing mask. Some masks are designed with double filters, and the filters are double-sided, so that the masks are relatively easy to breathe.

At present, there are KN100 grade products in China, and the comprehensive use cost is about one yuan per day.