High Chrome Alloy Slurry Pump Impeller Cr27

Features

Slurry pump impeller can play an extremely important role in the operation of slurry pump. By rotating, it can help slurry pump meet the needs of the equipment. The slurry pump impeller is easy to be worn out, so we search for the special materials to prolong the lifespan of impeller, high chrome white iron, aims at handling the slurries with strong abrasion or sharp particles.
As a China-based slurry pump impeller manufacturer, we provide a broad range of products, including froth pump, medium/light duty slurry pump, sump pump and FGD flue gas desulfurization pump, among others.

Material

1. Hi Chrome Cr27  is a wear resistant white iron that offers excellent performance under erosive conditions. The alloy can be effectively used in a wide range of slurry types. The high wear resistance of alloy Cr27 is provided by the presence of hard carbides within its micro-structure. Alloy Cr27 is particularly suited to applications where mild corrosion resistance, as well as erosion resistance is required.
2. Cr15Mo3 Marten-sic white iron with moderate erosion resistance.
3. A49 is suitable for low PH corrosion duties, where erosive wear is also a problem. The alloy is particularly suitable for Flue Gas Desulphu-rization(FGD) and other corrosive applications, where the pH is less than 4. The alloy can also be used in other mildly acidic environments. A49 has an erosion resistance similar to that of Ni-Hard 1.

Range

We could do Max weight to 10,000kgs per impeller

Failure analysis of the impeller of a slurry pump subjected to corrosive wear

A systematic study on the failing impeller of a slurry pump used in wet process phosphoric acid manufacture has been carried out by means of scanning electron microscopy in order to clarify the failure mechanisms. The results show that the weight loss of corrosive wear is affected by the impact velocity and its tangential and normal components in different areas of the impeller. The area where the impact velocity is below the critical value is a uniform corrosive wear area and its weight loss is very small. The area where the impact velocity is above the critical value is a non-uniform corrosive wear area, and its weight loss increases rapidly with the increase in impact velocity. The corrosive wear mechanisms are different from one area to another. In the areas where the tangential component of impact velocity is larger, the main mechanism is of a cutting mode. On the contrary, in the areas where the normal component of impact velocity is larger, the failure mode consists of the formation of microcracks and the removal of second phases. It is proposed that, owing to the existence of a mass of gypsum as abrasive in the slurry, the wear is mainly responsible for impeller failure, although some corrosion effect exists. With a certain corrosion resistance, increasing the wear resistance of materials may be an efficient means to prolong the service life of the impeller.

Keywords

• Corrosive wear; 
• Slurry pump; 
• Failure