AH type slurry pump

AH horizontal centrifugal slurry pump. Suitable for transporting highly abrasive, high-concentration slurry in metallurgical, mining, coal, power, and building materials industries. This type of pump can also be used in multi-stage series. The pump bodies of M, AH, and HH type pumps have replaceable wear-resistant metal or rubber linings, and the impellers are made of wear-resistant metal or rubber materials.

Introduction to AH type slurry pump

Pump body, pump cover and flow components: This series of pumps are horizontal, vertical-middle-type, double-casing slurry pumps. The pump body and pump cover have replaceable metal linings. The lining material is high-chromium wear-resistant alloy material, and the lining can be used until it is worn through, extending the maintenance cycle and reducing operating costs. The pump outlet direction can be rotated and installed at 8 angles.

Bearing assembly: The pump's bearing assembly adopts a cylindrical structure, which facilitates adjustment of the clearance between the impeller and the front guard plate, and can be removed as a whole during maintenance. The bearings are lubricated with grease.

Shaft seal (seal): The pump shaft seal types include packing seal, auxiliary impeller seal, and mechanical seal.

Transmission method: V-belt drive, elastic coupling drive, gear reducer drive, fluid coupling drive, frequency converter drive, and thyristor speed regulation are available. Among them, V-belt drives include CL, CV, CR, ZL, ZV, and ZR drives.

Overall performance: The pump has a wide performance range, good cavitation performance, and high efficiency. Multi-stage series technology can be adopted to meet long-distance transportation. The flow components are available in a variety of metals and increased depth. Using a variety of speeds and variations, the pump operates in industrial and mining settings. It has a long service life, high operating efficiency, and can meet various harsh conveying conditions.

Slurry pump working principle

First, let's talk about the relationship between centrifugal pumps and slurry pumps, and then the principle of slurry pumps will become clear. The concept of centrifugal force comes from the original pump. There are many types of pumps, and dozens of categories can be divided according to different angles. Centrifugal pumps are classified according to the working principle of the pump, which is the process of increasing the pressure of the transported medium through centrifugal force. Other common types include screw principle, plunger principle, etc., which can be divided into pumps different from the centrifugal principle. After talking about the concept of centrifugal pumps, let's talk about slurry pumps. Slurry pumps are classified from another angle, that is, from the transported medium. As the name suggests, slurry pumps transport a mixture of solid particles containing slag and water. But in terms of principle, slurry pumps are a type of centrifugal pump. In this way, these two concepts are explained clearly.

The main working parts of a centrifugal pump are the impeller and the casing. The impeller in the casing is located on the shaft and is connected to the prime mover to form an integral whole. When the prime mover drives the impeller to rotate, the blades in the impeller force the fluid to rotate, that is, the blades do work on the fluid along its direction of motion, thereby forcing the pressure potential energy and kinetic energy of the fluid to increase. At the same time, under the action of inertial force, the fluid flows from the center to the edge of the impeller and flows out of the impeller at a high speed, enters the discharge chamber, and then is discharged through the diffuser. This process is called the water pressure process. At the same time, due to the continuous rotation of the impeller, the fluid continuously flows out and is sucked in, forming continuous operation.

The working process of a centrifugal pump (including a slurry pump) is actually a process of energy transfer and conversion. It transfers the high-speed rotating mechanical energy of the electric motor through the pump blades and converts it into the pressure energy and kinetic energy of the pumped fluid.

Applications of AH, M, and HH type fractional slurry pumps

Slurry pumps are widely used in mining, power, metallurgy, coal, and environmental protection industries to transport slurries containing abrasive solid particles. For example, ore slurry transportation in metallurgical beneficiation plants, hydraulic ash removal in thermal power plants, coal slurry and heavy medium transportation in coal washing plants, dredging rivers, and river dredging. In the chemical industry, it can also transport some corrosive slurries containing crystals.

First, in the beneficiation plant application, about 80% are used in the mining industry beneficiation plant. Due to the harsh conditions of ore pre-selection, the service life of slurry pumps is generally low in this section. Of course, different ores have different abrasiveness. For example, in the fine ore transportation section, the abrasiveness is relatively reduced, and the overall service life of the pump is longer. Therefore, when users often ask suppliers about the service life of products during the procurement process, strictly speaking, no manufacturer will arbitrarily promise users an accurate service life cycle, because the service life of the flow components (wear-resistant and corrosion-resistant parts) depends on various factors. The diversity and complexity of working conditions lead to differences in the service life of materials of the same quality. However, in the early stage of selection, manufacturers with strong capabilities can provide reasonable working condition selection and design.

Secondly, in the power industry, it is mainly thermal power plants. At present, China's power plants mainly use thermal power generation and hydropower generation. In thermal power plants, due to the use of a large amount of coal-fired power generation, the furnace slag or ash slag needs to be removed. Slurry pumps are used for the purpose of ash removal. After the furnace slag is mixed with a certain amount of water, it is transported to the ash slag dumping place through a slurry pump, so sometimes the slurry pump is also called an ash pump in the power plant.

Thirdly, in the coal washing industry, due to different working conditions, larger coal lumps and coal gangue are easy to block, so the design requirements for slurry pumps are very high. A coal washing plant under Huaibei Mining Bureau adopted a specially designed slurry pump in 2005 to replace the previously imported slurry pump from Australia. It has been operating normally, transporting larger coal lumps and coal gangue without blockage, and its wear and tear life exceeds that of imported pumps.

In the field of seawater sand selection, slurry pumps are also gradually being accepted by customers. However, in seawater sand selection and river dredging, slurry pumps are more easily referred to as sand pumps or dredger pumps. Despite the different names, from the structural characteristics and pumping principles, they can all be generally called slurry pumps. Therefore, in seawater sand selection, we often call them sand pumps, while in river dredging, they are customarily called dredger pumps.

Although slurry pumps have a wide range of uses, correct application is crucial. Due to limitations in the name itself, some non-professionals misunderstand slurry pumps. In fact, mud pumps, impurity pumps, dredger pumps, and dredging pumps all fall within the scope of slurry pump applications. During the application of slurry pumps, it is essential to pay attention to reasonable design, correct calculations, and appropriate selection. These points are very important.

AH Slurry Pump Performance Parameters Table

AH Type Slurry Pump Structure Diagram

	1、Shaft
	2、Shaft Seal
	3、Support Components
	4、Packing
	5、Stuffing Box
	6、Impeller
	7、Rear Casing
	8、Discharge Pipe
	9、Casing
	10、Impeller
	11、Protective Sleeve
	12、Front Casing
	13、Pump Cover
	14、Inlet
	15、Shaft Sleeve

On-site Photos