The comparison of the vanadium precipitation method is shown in the table.
Table comparison of vanadium precipitation methods
Project | Hydrolyzed precipitation | Acidic ammonium salt | Weakly acidic ammonium salt vanadium | Alkaline ammonium salt vanadium | Calcium vanadate method | Ferric vanadium method |
pH value of vanadium | 1.5 to 3 | 2 to 3 | 4~6 | 8~9 | 5~11 | <7 |
Acid consumption | Very large | Big | small | Very small | ||
Ammonium consumption | no | small | Big | Very large | ||
Initial vanadium concentration | Can be big or small | Can be big or small | Big | Big | Can be big or small | Can be big or small |
Three waste problem | Waste liquid | Waste liquid, waste gas | Waste liquid, waste gas | Waste liquid, waste gas | Waste liquid | Waste liquid |
Production cycle | short | short | long | long | short | short |
Vanadium yield/% | ~98 | >98 | >38 | >98 | 97～99.5 | 99～100 |
Product contains V 2 O 5 /% | >85 | >99 | >99 | >99 | low | low |
Extrusion molding, also known as extrusion molding or extrusion molding, mainly refers to a molding method in which heated and melted polymer materials are forcibly formed into continuous profiles with constant cross-section through the die under the promotion of pressure with the help of the extrusion of screw or plunger. Extrusion process mainly includes feeding, melting and plasticizing, extrusion, shaping and cooling.
Extrusion molding is an efficient, continuous, low-cost and wide-ranging molding processing method. It is an early technology in polymer material processing. After more than 100 years of development, extrusion molding is a molding processing method with the most production varieties, the most changes, high productivity, strong adaptability, wide applications and the largest proportion of output in the field of polymer processing.
Pu plastic extrusion is also known as extrusion in plastic processing. In non rubber extruder processing, it uses hydraulic press pressure to extrude the die itself. It refers to a processing method in which materials are heated and plasticized while being pushed forward by the screw through the action between the extruder barrel and the screw, and continuously pass through the machine head to make products or semi-finished products with various sections.
PU extrusion profile, PU plastic extrusion profile, PU plastic extruded profile, PU plastic custom extrusion profile
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