Material selection for slurry pump
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Option 1: The pump body is made of 1Cr13 stainless steel, while the parts that are exposed to flow (such as the volute and impeller) are treated using nano-diamond penetration technology. The thickness of the coated layer can range from 0.3 mm to 3 mm, and its hardness can reach 45–65 HRC. This coating provides resistance to corrosion, erosion, and high temperatures (up to 600°C). The penetration process involves submerging all the components in a penetrant before placing them together in a furnace for heat treatment, thereby ensuring that all parts exposed to flow are coated. The expected service life is 3 to 5 times that of a standard lined pump. For cases where the pumped medium contains catalyst particles, taking into account the material’s corrosion resistance and erosion resistance, the nano-penetrated diamond technology is employed. Option 2: The entire pump body is made of 1Cr13 stainless steel, while the parts that are subject to flow (such as the volute and impeller) are treated using ultrasonic flame spraying with tungsten carbide; this method provides good corrosion resistance and strong adhesion, and an expected service life of 6 years can be achieved. Re-spraying can be carried out on-site after 6 years. Option 3: Materials for the main components of the slurry pump. Outer casing: ZG1Cr13Ni; Inner casing: KmTBCr15; Impeller: KmTBCr15; Shaft: 4Cr144mO. Which of these three options do you think is the best?
I originally thought Option 2 was okay, but do we have to repaint it in 6 years? If that’s the case, Plan 1 is better.
It still depends on the solid content in the slurry; if it’s low, equipment with lower investment costs can be considered. If the first option is chosen, the cost is likely to be higher. Leaks caused by catalyst wear are now much less frequent.
It’s for a meeting tomorrow; please ask the experts to help analyze the advantages and disadvantages of each option