The Slurry Pump is a Industrial Pump that conveys a mixture of solids and water. Therefore, the medium will be abrasive to the flowing parts of the slurry pump. Therefore, the slurry pump flowing parts need to be made of wear-resistant materials.
The commonly used metal materials for slurry pumps are divided into cast iron, ductile iron, high chromium cast iron, stainless steel and so on. High chromium cast iron is the third generation of wear-resistant material developed after ordinary white cast iron and nickel hard cast iron. Due to the characteristics of the structure of high chromium cast iron, it has much higher toughness, higher temperature strength, heat resistance and wear resistance than ordinary cast iron. High chromium cast iron has been praised as the best anti-abrasive material in the contemporary era, and it has been widely used day by day.
China's national standard for wear-resistant white cast iron (GB/T8263) stipulates the grade, composition, hardness, heat treatment process and usage characteristics of high chromium white cast iron.
The executive standard for high chromium cast iron in the United States is ASTMA532M, the United Kingdom BS4844, Germany DIN1695, and France NFA32401. Russia developed 12-15% Cr, 3-5.5% Mn and 200mm wall thickness ball mill liners in the former Soviet Union, and now implements the ҐOCT7769 standard.
The main materials used for the flowing parts of slurry pumps at home and abroad are stainless steel, high chromium cast iron and nickel hard cast iron. High chromium cast iron is an ideal candidate material for the flowing parts of slurry pumps. Through the adjustment or selection of carbon and chromium content levels, the best use effects of flowing parts under different industrial and mining conditions can be obtained.
High chromium cast iron is the abbreviation of high chromium white anti-wear cast iron. It is an anti-wear material with excellent performance and special attention; it has much higher wear resistance than alloy steel and much higher toughness and strength than general white cast iron. At the same time, it also has good resistance to high temperature and corrosion, coupled with convenient production and moderate cost, and is known as one of the best anti-abrasive materials in the modern time.
Now A series of high chromium cast iron wear-resistant materials are the commonly used:
The slurry pumps made of A05 (Cr26) material are the most widely used in the mining industry. The micro-structure of the high chromium alloy A05 shows that it consists of hard eutectic chromium carbides in a fully hardened marten-site matrix. In slurry pump applications where both abrasive and corrosive but abrasion dominates, the performance of this material is significantly better than the other white cast irons.
Although the wetted parts made of A07 (Cr15Mo3) material have higher wear resistance, better hardness and longer service life than A05, their cost is twice of that of A05, so the cost performance is lower and the scope of use is smaller.
A49 (Cr30) is essentially a high chromium low carbon white cast iron. The micro-structure is hypo-eutectic and consists of eutectic chromium carbides in an austenite/martensite matrix. The carbon content of high chromium A49 is lower than that of high chromium A05. There is more chromium in the matrix. In a weakly acidic environment, high chromium A49 has higher corrosion resistance than high chromium A05.
For now, the above mentioned are the metal materials commonly used in our slurry pumps. According to the particularity of the transported medium, Slurry pump manufactures will choose the most suitable material for you.

We are pleased to announce the official establishment and commencement of operations of a new slurry pump company, Better Pumps. Better Pumps is the broth company of the leading slurry pump supplier CNSME Pump, aiming to provide customers with a wider and more professional selection of services and products.
 
The establishment of Better Pumps signifies our continuous growth and expansion in the slurry pump industry. As a brother company of CNSME Pump, we inherit its years of experience and reputation in the slurry pump sector, committed to further meeting customer needs through innovation and excellent service.
As an emerging enterprise, Better Pumps will strive to build a passionate and creative team, offering customers high-quality and reliable slurry pump products and solutions. We will uphold the principle of customer supremacy, endeavoring to create value for customers and establish long-term and stable cooperation relationships with them.
We look forward to witnessing the growth and development of Better Pumps together with you. If you have any questions or needs regarding our products or services, please feel free to contact us. Thank you!

Pump Model: 150ZJ-A60

ZJ series slurry pumps, totally designed and developed by Chinese local engineers, are high head slurry pumps mainly used for filter press, coal washing, power plants etc.. 150ZJ is a 6-inch discharge size slurry pump, with impellers varying from 420mm to 710mm.

It’s wet-end spare parts are made of high chrome alloy ONLY, a kind of highly abrasion and erosion resistant white iron, similar to ASTM A532. There are no elastomer alternatives.

Material Construction:





Part Description
Standard
Alternative


Impeller
A05
A33, A49


Volute Liner
A05
A33, A49


Front Liner
A05
A33, A49


Back Liner
A05
A33, A49


Split Outter Casings
Grey Iron
Ductile Iron


Shaft
Carbon Steel
SS304, SS316


Shaft Sleeve
SS304
SS316, Ceramic, Tungstan Carbide


Shaft Seal
Expeller Seal
Gland Packing, Mechanical Seal


Bearings
ZWZ, HRB
SKF, Timken, NSK etc.




Applications:

Filter Press Loading, Power Plants, Mineral Processing, Flue Gas Desulphurization, Coal Washing, Metallurgy etc.

Specifications:

Flowrate: 135-550m3/hr; Head: 14.7-63.5m; Speed: 490-980rpm; Lubircation: Oil

Impeller: 5-Vane Closed Type with max. passage size 48mm

The role of the slurry pump is to transport the slurry out. Then it conveys the distance height and so on determines its head. Sometimes we will need high head slurry pump to slurry out. So what are the high head pumps. CNSME to bring you to talk about the high head slurry pump series.

1. HH type slurry pump. This is a high head slurry pump developed according to the AH series. Its highest head can reach about 100 meters. Double pump shell structure, the overflow parts are made of high chrome alloy.

2. ZJ type slurry pump. This series of slurry pump is to adjust the head by changing the size of the impeller. Its highest head can also reach more than 100 meters in some models.

3. ZGB series slurry pump. This series of slurry pump is a high efficiency, large flow, high head slurry pump. And if the head of a single pump can not reach, the series of slurry pumps can also be used in series to achieve the required head.

These three series of slurry pumps are the high head slurry pumps that CNSME has organized for you. Hope to help you.

Reason I: Impeller unbalanced

Wear and clogging of the impeller will cause the uneven distribution of the impeller mass and then lead to vibration. Impellers should be checked and maintained at a regular time basis.

Reason II: Unreasonable assembly of bearings

Re-assemble the bearings onto the shaft, or change the bearings.

Reason III: Inadequate lubricants for the bearings

Too much or too little of the grease or oil or contaminated grease or oil will cause the short life of the bearings. Take out the bearings and use them again only after cleaned up.

Reason IV: Asymmetry or non-parallel of the motor shaft and the pump shaft

Adjust the motor shaft or the pump shaft, replace with a new shaft if the current one is deformed or bent.

Reason V: Uneven feeding of materials

Uneven feeding of materials or big solids entering will cause unstable flow inside the pump chamber, keep an even slurry feeding and protect large solids from entering into the pump.

Reason VI: Cavitation

Too low pressure inside the pump will generate bubbles and when the bubbles break, there will be vibration and noise. Raise the pump suction liquid level to increase static head.

Reason VII: Loose of the foundation or spare parts or incorrect installation

Loosened foundation or internal or external pump parts will cause vibration during pump operation. Check and maintain the slurry pump regularly.