1. Cutting tools to keep sharp, and grinding out the larger rear angle and clearance angle; do not call the use of blunt, sticky chip or broken knife.

2. In general, try to use large feeds for processing, to avoid the use of tiny feed to produce larger chips.

3. Do not let the tool stop on the workpiece.

4. When using tiny cutting amounts, use mineral oil coolant to reduce cooling.

5. If the magnesium alloy parts in the steel core lining, be careful with the tool collision spark.

6. Keep the environment neat and clean.

7. Do not smoke in the machine work area, fire, welding.

8. Adequate Class D fire extinguishing equipment should be stored in the work area.

Magnesium dust is easy to burn, suspended in the air will cause an explosion. Take all possible measures to ensure proper collection and disposal of magnesium grinding dust. When dry grinding of magnesium, it must be removed from the working area with a properly designed wet system. The vacuum cleaner should be kept clean and its exhaust can be set outdoors and the magnesium slag in the vacuum cleaner should be cleaned up frequently to prevent its accumulation. Before the sludge is treated, it should be kept under water The

Keep the working environment clean and tidy at all times, which is essential to ensure the safety of grinding magnesium. Every day, the connection between the grinding wheel and the vacuum cleaner must be thoroughly cleaned. Do not allow magnesium dust to focus on seats, windows, piping and other levels. Do not connect too many dust-producing equipment to a centralized discharge system.

Drying Pipes A long central vacuum system and an ordinary vacuum cleaner with a filter are not suitable for the collection of magnesium dust. If wet grinding of magnesium is carried out on a belt grinding machine or a disc grinder, sufficient amount of cutting fluid should be used to collect all the dust and deliver it to the collection point.

In summary, the following precautions must be taken when grinding magnesium:

1. It is necessary to set aside a grinder specially for magnesium and affix the "magnesium special" label. Before cleaning the grinding wheel, clean up the vacuum cleaner.

2. When reworking the surface of the magnesium which has been erased with chromate, it is possible to cause a spark, so be careful not to allow dust to focus in the vicinity.

3. Grinding equipment Operators should use smooth hats, smooth gloves and smooth clothes without pockets and cuffs. The aprons or protective clothing used should be clean and easy to remove.

4. The warning signs should be placed in a conspicuous place.

5. The work area should be stored in a sufficient amount of D-type fire fighting equipment.

Dry chips should be placed in clean and sealed steel containers and kept in places where they do not come into contact with water. Wet chips and sludge should be stored in a remote, ventilated steel window and must have sufficient ventilation to allow hydrogen to escape. It is particularly dangerous to install wet chips and fine powder in a tightly packed container, which poses a risk of explosion at high concentrations of hydrogen.

Magnesium powder, magnesium powder and sludge commonly used method is: with 5% ferric chloride solution to dissolve, in a few hours so that the vast majority of magnesium into non-combustion of magnesium hydroxide and magnesium chloride residue. Since hydrogen is generated in this reaction, it should be treated in an open container outdoors and it is forbidden to smoke or weld around the reactor. The amount of ferric chloride used for the general 1 kg of dry magnesium using 0.6 kg of ferric chloride, in the preparation of 5% solution, the sludge should be taken into account the water.

▲ fire fighting usually use the following materials or methods:

1.D class fire extinguisher: its material is usually the use of sodium chloride-based powder or a passivation of graphite-based powder, the principle is to eliminate oxygen by bite out of fire; due to the origin of magnesium alloy die casting later, the current D class Fire extinguishers only foreign manufacturers have production, so the purchase should be identified when the quality certification and insurance companies to ensure that products, security and practical and effective.

2. Covering or dry sand: a small area of ​​fire can be covered with its principle is also through the exclusion of oxygen to bite off the fire.

3. cast iron debris: no other good fire extinguishing materials can also be used in the case, the main role is to drop the temperature below the ignition of magnesium, rather than the fire boring off.