2. When discharging gas, the principle of low-concentration emission should be adhered to, and the gas concentration after mixing the discharged airflow with the full-wind pressure can not exceed 1.5% by controlling the air volume.
3. Discharge gas, the route through which the return air flows must cut off the power supply, evacuate the personnel, set the fence or alert, and stop the operation. The power supply can be restored when the gas concentration in the roadway airflow does not exceed 1.0% and the carbon dioxide concentration does not exceed 1.5%.
4. When the concentration of gas in the closed roadway does not exceed 3%, the person in charge of the level shall be responsible for the discharge. When more than 3%, the person in charge of the level shall submit written measures, approved by the person in charge of the mine, and discharged by the mine leader. The mine rescue team assisted in the discharge.
5. The work of discharging gas should be carried out from the outside to the inside. It is strictly forbidden to discharge gas at the same time in two gas-limited locations in one production system.
6. After the local ventilator is turned on, the two staff members who wear the self-rescuer walk in tandem, gradually withdraw the enclosed area, and gradually add the air duct from the outside to the inside.
7. In gas emission, when the gas concentration is below 1.0%, it can enter the shutdown area.
Aluminum alloy materials are widely used in all walks of life due to their low density, high strength and stiffness, good corrosion resistance, and good processing performance. At present, the proportion of aluminum alloy forging in the aluminum alloy industry is still relatively small. Due to the relatively high cost of aluminum alloy forging, the production technology is relatively difficult, and most of them are used in parts that are particularly important in stress. However, with the rapid development of the aerospace and automotive industries, the demand for aluminum alloy forgings is increasing day by day. In particular, the forgings on the aircraft account for a large proportion, mainly aluminum alloy forgings, because the aircraft has relatively high requirements for strength and weight. There is also an increasing demand for aluminum forgings in the automotive industry. Therefore, our future task is how to improve and improve the aluminum alloy forging technology to meet the increasing demands of the aluminum forging industry.
Aluminum alloy forging is relatively easy in the forging industry, and SCZY can easily deal with steel forgings, so under the condition of reasonable product structure, we can fully handle the production and service of aluminum forgings.
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