Collection of Common Problems of Slurry Pumps for Customers to ...

A collection of common problems with slurry pumps for customers to read. CNSME Slurry Pump Company has received feedback from customers before asking our technicians what issues should be paid attention to when using slurry pumps?In fact, slurry pumps are suitable for a variety of complex working conditions. The working characteristics of slurry pumps are that the slurry processed mostly contains various solid particles, which requires us to know more about the precautions for use in daily operations. Today we will talk about the precautions for use of slurry pump ore dressing.1. Maintenance of shaft seals for slurry pump ore dressing. The shaft seal pump should regularly check the seal water pressure and water volume when dressing the slurry pump, and always keep a small amount of clean water flowing along the axis. Regularly adjust the filler gland, check the filler and replace the filler regularly. The shaft seal water pressure and the shaft seal water volume should meet the above requirements (shaft seal inspection).For secondary impeller shaft sealing pumps equipped with oil cups, oil should be regularly filled with oil cups to lubricate the internal filler or lip sealing ring.2. Adjustment of impeller for slurry pump ore dressing　In order to ensure the pump operation, the gap between the impeller and the front guard plate must be adjusted in time. The gap between the metal-lined pump impeller and the front guard plate is between 0.5-1mm, and the gap between the rubber-lined pump impeller and the front and rear sheath must be equal.3. Use bearing lubrication when slurry pump ore dressing. When slurry pump ore dressing, the operating life will be longer if the assembly is correct, the lubricating oil is appropriate, and the maintenance is timely. Maintenance personnel should regularly inspect the bearing components and check the conditions of bearings and greases. The maintenance interval generally does not exceed 12 months.Slurry pumps are widely used in important basic departments such as mining, metallurgy, coal, hydraulics and transportation. During the process of transporting solid-liquid mixtures such as slurry, cinders and mud, they are impacted by solid particles, and their overflow parts cause severe wear, resulting in a shortening of the service life of the slurry pump and affecting the normal operation of the equipment.Therefore, reducing the wear of the slurry pump overflow parts is the key in actual production.Generally, in practical applications, the main measures to reduce the wear of the slurry pump overflow parts are as follows: 1) Use reasonable impeller geometric parameters: In order to meet the required head and reduce wear, a larger blade inlet diameter and outlet width are selected, which reduces the relative speed at the inlet of the impeller, reduces the wear of the impeller, and prevents blockage.2) Reasonable matching of volute shell and impeller: If the shape of the slurry pump volute shell is unreasonable, it will accelerate wear. When designing, you should consider matching with the impeller. While meeting the pump performance, try to keep the liquid flow rate in the volute as small as possible, otherwise the wear will be very serious.3) Reasonable selection of materials for considering the characteristics of the medium: The service life of the slurry pump is largely related to whether the selected material is appropriate.During the material selection process, the geometry and particle size of the solid particles in the slurry should be fully considered. If the solid particles are small and have regular shapes, the particles are evenly distributed and there are no sharp sharp objects, non-metallic materials such as rubber and engineering plastics can be selected to ensure good wear resistance while also reducing costs.When the geometry of solid particles in the slurry is extremely irregular and the particle size composition is widely distributed, materials with high hardness and good wear resistance should be selected, such as hard nickel and high chromium cast iron materials, because such materials have certain advantages in resisting the wear of solid particles in the slurry.4) Adopting a reasonable anti-wear structure: Adopting a reasonable structure is an effective way to slow down the wear of the slurry pump.For example, setting up linings, thickening bushings and impellers, setting up secondary blades and secondary impellers can also reduce wear.There are three functions of cooling water in the slurry pump, namely cooling, cleaning, and lubrication and maintenance.So how to grasp the cooling water usage in the slurry pump?The cooling water usage of slurry pump is affected by the machine seal type, pump type, and pump pressure factors. Let’s talk about the rules and reasons of the influence of these three factors: 1. Mechanical seal of slurry pump. There is a mechanical seal of slurry pump. In this case, there is no need to add cooling water.Both internal flushing mechanical seals and external flushing machine seals require cooling water with a slurry pump.2. Slurry pump type factors The amount of cooling water for the slurry pump gradually increases as the pump type increases, that is, the larger the pump type, the greater the cooling water for the slurry pump.3. Slurry pump pressure factors The greater the pump pressure, the greater the cooling water used in the slurry pump, which is proportional to the pressure.In view of the above three situations, the cooling water consumption of the slurry pump is affected by the pump parameters. The specific usage reference table is too complicated and will not be listed one by one here. If you have any specific questions, please contact our customer service for you. Of course, if there are other knowledge that slurry pumps want to know, you are welcome to call and we will answer them one by one!

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Slurry pumps, and centrifugal pumps, move fluid mixtures containing solid materials, such as mud, ore slurry, ore sand, etc. Vertical and horizontal slurry pumps are two different types of slurry pumps.

The characteristics, variations, benefits, and drawbacks of vertical and horizontal slurry pumps will be discussed in this article. Keep reading below to know more!

What is a Horizontal Slurry Pump?

The horizontal slurry pump is the primary machinery for various industrial applications. Compared to a living body, the slurry delivery system, the slurry pump acts as the heart, pumping the slurry (blood) to the system’s various organs and equipment.

These pumps are made for efficiency and durability. Horizontal slurry Pumps are developed with cutting-edge hydraulic and wear-resistant technologies that guarantee an excellent pumping solution for harsh corrosive, and abrasive slurry applications. A horizontal slurry pump’s distinctive qualities and advanced designs dramatically lower operating expenses.

Features of Horizontal Slurry Pumps

The horizontal slurry pump uses mechanical seals, and most parts can be switched out to extend their useful life. The horizontal slurry pump is solid and durable, has a long service life, has a roomy flow path, and has good corrosion resistance. In addition, it has simple operation and quick maintenance.

Pumps come in a variety of types. Here, we mainly discuss horizontal centrifugal slurry pumps, which feature the following features:

• The primary application areas are metal smelting, sewage treatment, power plants desulfurization, sand and river dredging, and mineral processing plants.
• Centrifugal pumps use the rotation of the impeller to provide energy to the slurry for pipeline conveyance. Additionally, because slurry pumps are typically employed in demanding environments, they usually have a compact horizontal structure.
• Since the slurry contains solids, it necessitates wet-end components for slurry pumps with good wear resistance. The wet end components must be corrosion resistant since the slurry is also corrosive under mine concentration and desulfurization conditions.
• To maintain wear or corrosion resistance under various working circumstances, wet end parts are typically comprised of high chromium or rubber materials.
• The mechanical, glandular, and expeller seals are the several types used in horizontal slurry pumps.
• In slurry pump operation, durability and dependability are essential. Slurry pumps have a substantially lower efficiency than water and chemical pumps since pump efficiency is generally considered secondary.
• A horizontal slurry pump is extended. Pump shafts often use stiff shafts to sustain large loads to satisfy the demands of hard-working circumstances.
• Slurry pumps have significant passages because they are made to move solids, which results in strong passage ability.

Application of Horizontal Slurry Pumps

It is used to transport ore pulp, which can have a concentration of up to 50%, or other heavy medium liquid weighting agents. It is a necessary piece of machinery for moving ore, silt, and ash in construction, mining, and other industries. It is primarily used to discharge concentrator tailings and transport concentrate slurry. Additionally, it can transport slurry in cement factories, high-temperature crystalline slurry in aluminum plants, and media in coal preparation facilities.

Product Principle of Horizontal Slurry Pumps

The impeller beneath the rigid shaft of the horizontal slurry pump is regulated and rotated clockwise by a motor through a V-belt pulley. The feed port allows the slurry to enter the pump chamber, and the impeller’s rotation causes the slurry to be discharged.

The horizontal slurry pump operates on a similar premise as a centrifugal pump. The impeller and the casing are the fundamental components of the horizontal slurry pump. The primary mover is included in the impeller and cannot be detached from it; it is situated on the shaft in the casing. The slurry pump’s impeller drives the blades to rotate under the action of the prime mover, turning the fluid. The fluid gains both kinetic and potential energy under pressure. Additionally, due to the centrifugal force, the liquid is dispersed from the impeller’s center to its outside edges, creating a high tangential velocity expelled from the impeller.

What is a Vertical Slurry Pump?

The most extensive selection of centrifugal slurry pumps for mining, chemical, and other industrial applications are horizontal slurry pumps. The horizontal slurry pumps are for heavy-duty uses like tailings, power plants, and mill discharges. They are also made for specialized services like continuously pumping highly abrasive, high-density slurries.

A vertical axial suction, one-stage, single suction centrifugal structure makes up the vertical slurry pump. Impeller, volute, rear liner plate, shaft sleeve, support, support plate, shaft, bearing, bearing body, and other components make up most of it. Depending on the slurry’s characteristics, different materials are used for the impeller, volute, back liner plate, and other sections that come into touch with the slurry.

The volute, support, and bearing body are joined by bolts, while threads connect the impeller and shaft. The pump shaft and motor can be driven directly by connection or belt. The vertical pump has a grease-lubricated bearing and no circumferential peak construction. Vertical Slurry Pumps are highly configurable pumps to lower operating and maintenance expenses. Wear parts are composed of solid metal or rubber, and they take up less floor area than horizontal pumps.

Features of Vertical Slurry Pump

To lessen the back pressure on the impeller and increase the lifespan of the seal, the vertical slurry pump uses an auxiliary impeller. In addition, the flow sections are composed of abrasion-resistant white cast iron that is wear-resistant. To increase longevity, the pump’s flow components and inner lining are constructed of rubber that is both wear- and corrosion-resistant. The vertical slurry pump is lightweight and straightforward to install, among other qualities.

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• Vertical centrifugal pump with one stage, one suction, and wet parts made of high-chrome cast iron alloy with anti-abrasion coating on the casing, impeller, and liner plate.

• Input agitators are made for fluids with high concentrations, and suction pipes can be added to the pump inlet depending on the pit’s depth.

Pumps come in a variety of types. Here, we mainly discuss vertical centrifugal slurry pumps, which feature the following features:

• It utilizes a single pump casing and vertical cantilever type.
• High chromium alloy or rubber impeller used in a double-suction, semi-open impeller design.
•  High-capacity bearings are used in cylindrical bearing assemblies, and grease is used to lubricate the bearings.
•  The spacing between the impeller and guard plate can be changed to ensure the pump operates effectively.
•  No shaft seal is necessary.
•  Both the pump and the motor have the option of direct drive or V-belt drive.
•  To set up rubber to adapt to highly corrosive working circumstances, use rubber that has been wetted and rubber that is in touch with slurry.

Application of Vertical Slurry Pump

Transporting mud, mortar, mining slurry, and other similar liquids containing suspended solid particles is the primary function of vertical slurry pumps. For instance, an oil drilling mud purification system or a concentrator that transports slime, tailings, and concentrate slurry. In various mining, chemical, electric power, building materials, agricultural, and other industries, it is suitable for transporting abrasive or corrosive slurries.

Principle of Vertical Slurry Pump

Vertical slurry pumps are mainly used to transport mud, mortar, ore slurry, and similar liquids containing suspended solid particles, such as oil drilling mud purification systems, concentrators conveying concentrate slurry, tailings, slime, etc. It is suitable for sharing abrasive or corrosive slurries in various mining, chemical, electric power, building materials, agriculture, and other industries.

Many impeller configurations can be utilized over a standard shaft to create high pressure. At the earth level, this will be necessary for deep wells.

These pumps function whenever water is drawn into the pump’s base through a suction bell, which appears as a bell component. It then enters the primary stage impeller to increase the water’s velocity. Water then enters the diffuser bowl directly above the impeller, where the high-velocity energy may be converted into high-pressure.

Horizontal Slurry Pumps Vs. Vertical Slurry Pumps: What are the Differences?

Let’s summarize their differences after reading their introductions:

Vertical pumps, also known as submerged slurry pumps, are long-axis submersible pumps that can be submerged in liquid to function. They can also be left idle and work when there is inadequate suction. Because the horizontal pump typically has no suction lift and cannot be used to carry the slurry to the underground pond, it is appropriate to do so.

The horizontal slurry pump is a ground-mounted horizontal pump. For the slurry to flow automatically into the pump chamber without opening the pump, it often requires an inverted installation. If you need additional details, visit www.kingdapump.com. You will receive a response from our professional slurry pump selection engineer.

Starting method

Reverse irrigation is not required to start the vertical submerged slurry pump. The suction performance is improved since the impeller is submerged. As a result, it can operate faster and without modification when inadequate suction occurs, whereas the horizontal slurry pump requires reversal installation.

Installation area

The vertical submersible slurry pump is lightweight and has a small footprint. The horizontal slurry pump has a wide area and needs to be installed in a broad area. However, the vertical submerged slurry pump can be appropriately chosen if the slurry pump unit utilizes a little space.

Structural features

The horizontal slurry pumps typically have a twin pump shell structure, whereas the vertical submersible pumps have a single pump shell structure.

Maintenance

The horizontal slurry pump is positioned above the water’s surface, making maintenance easier. The working portion of the vertical submerged slurry pump is below the liquid level, making maintenance difficult.

Summary

Slurry pumps, and centrifugal pumps, move fluid mixtures containing solid materials, such as mud, ore slurry, ore sand, etc. The characteristics, variations, benefits, and drawbacks of vertical and horizontal slurry pumps were discussed in this article. A horizontal slurry pump is a primary machinery for various industrial applications. It has cutting-edge hydraulic and wear-resistant technologies for harsh corrosive and abrasive slurry applications.

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