Surface treatment and cleaning safety technology of mechanical equipment flange and phosphating are two common surface treatment methods for steel parts. Because drugs such as acid, alkali and antacid need to be used in the process, and harmful gases and waste liquid containing acid and alkali are discharged. Therefore, the flange and phosphorous chemical process should be set up separately, the plant should be appropriately higher (the height of the rail surface is 5~7m), and skylights should be set and even the whole room ventilation should be adopted. Corrosion resistance should be considered for floors and sewers. Acid pickling, flange, phosphating, hot water cleaning and other equipment should be installed with good air suction devices.
operators should be familiar with and abide by the flange and phosphating operation procedures, and wear labor protection appliances as required. Wear rubber gloves and masks when preparing various solutions and adding acids and lyes.
the waste water discharged from the flange and phosphating process should be concentrated in the waste water tank, and can be discharged after neutralization treatment and meeting the discharge standards.
the preparation of the solution must comply with the procedures specified in the process code to prevent the human body from being burned by the collapse, overflow or splash of the solution caused by improper operation.
for the dilution of concentrated acid, only add the acid slowly to the water, and never add the water to the concentrated acid. When contacting with acid and alkali, you must be careful. Once the body is stained with concentrated acid and alkali, you should immediately wash it with a large amount of cold water and treat it in time.
when the workpiece enters and leaves the hot water tank and flange groove, the operation should be careful. For the equipment working under boiling state, the formula should be and can be modified by itself to improve the consistency of test data, and the temperature should be well controlled to make its boiling not too intense, so as to avoid solution splashing. When using steam or other heat sources to heat hot water, attention should also be paid not to make the solution tumble violently and cause overflow.
the slings, hangers, material baskets, lifting chains, etc. used for flanges and phosphating should be specially managed, identified and replaced regularly to prevent the whole basket of workpieces from falling into the tank due to local corrosion damage, resulting in an increase of 1% over the same period in 2012 Or it breaks suddenly during lifting, causing injury accidents.
due to the high humidity of the working environment and corrosive gases such as acid and alkali, the equipment is very easy to be damaged. The damaged parts should be repaired and replaced in time. Personnel irrelevant to the operation of the experimental machine are not allowed to operate the experimental machine. Electrical equipment should pay more attention to protection to ensure good insulation.
if hot oil is used, the heating temperature of the oil tank should not be too high, and the transformer oil or mechanical oil generally should not exceed 120 ℃.