Why do we need to select a type of polyacrylamide (PAM)?

Why do we need to select a type of polyacrylamide (PAM)?

The types of sand are different, the types of mud are different, and the drugs are completely different.
Gravel sand, machine-made sand, river sand, mountain sand, the amount of mud content, the fineness of the slurry, the flocculation effect varies greatly.

Without selecting the type, the sludge cannot be pressed out, the clear water is not clean, and the circulation cannot return.
The key points for sand washing are as follows:
The clear water must be clean and able to circulate for sand washing;
The sludge cake must be dry and not loose, and easy to load onto the vehicle.

Wrong choice of types:
Clear water is turbid → The sofa washed out turns yellow and black;
Sandy slurry → The filter press leaks slurry, produces low output.

The selection is twice as bad, and the cost is several times higher.
The dosage of the sand washing agent is extremely large. Just a slight difference in selection can result in an additional cost of several hundred to several thousand yuan per day.
Correct choice: Low dosage, quick flocculation, and clay-like texture.
Wrong choice: Adding more agents won't help at all, and it will also consume more electricity and labor.