Changsha Zoomlian Pump Co., Ltd. 长沙中联泵业股份有限公司

language
    language

    Wear-resistant multistage pump for coal mines

    Publication Date:

    2025-09-05

    Author:

    Source:

    Facebook Linkedin Twitter Tumblr Pinterest

    In coal mining production and processing, water pumps are essential and commonly used equipment. Typically, mine water pumps are multi-stage centrifugal pumps of the D, MD, and MD(P) series. The main difference between the D and MD series lies in their material composition, with the latter offering superior wear resistance. Meanwhile, the MD(P) pump is a self-balancing, multi-stage centrifugal water pump specifically designed for coal mines. In addition to its high-head capability, this model also boasts exceptional durability against abrasion.

    The D-type multi-stage pump for coal mines is a single-suction, multi-stage, sectional centrifugal water pump designed specifically for conveying clean water free of solid particles—or liquids with physical and chemical properties similar to water. The temperature of the medium being pumped ranges from 0°C to +80°C. Featuring a wide range of flow rates and head capacities, this D-type multi-stage centrifugal pump boasts high efficiency, making it ideally suited to meet the demands of mine drainage systems. Additionally, its head characteristic curve is relatively flat, with an initially high head output, which ensures stable pump operation. At zero flow, the power consumption remains low, facilitating smooth motor startup. Moreover, the pump’s efficiency curve is nearly flat, further enhancing its versatility and expanding its potential applications across various industrial settings.

    D-Type Multi-stage Pump for Coal Mines

    The MD-type horizontal wear-resistant multi-stage pump for coal mines is a single-suction, multi-stage, segmental centrifugal pump specifically designed for mining applications. This type of water pump is ideal for conveying neutral mine water containing solid particles at a concentration of no more than 1.5% (with particle size smaller than 0.5 mm) as well as other similar wastewater. The temperature of the medium being pumped should not exceed 80°C. These pumps are suitable for use in steel plants, mine drainage systems, sewage transfer operations, and other industrial settings. The MD-series multi-stage pump incorporates a hydraulic model that meets the national recommendations for high-efficiency and energy-saving products. Its filtration components and easily worn parts are crafted from highly wear-resistant materials, ensuring excellent durability. Additionally, the pump design integrates the two-phase flow theory to enhance its suction performance and optimize hydraulic efficiency. This innovative approach not only boosts the pump’s suction lift but also minimizes impact-induced wear within the pump, enabling more effective energy conversion—thereby improving overall pump efficiency and extending its service life. All flow-through components of this pump are manufactured using precision casting techniques, guaranteeing precise flow channel dimensions and exceptional surface smoothness. As a result, the pump delivers outstanding energy-saving performance. Notably, this pump has successfully passed the national Coal Safety Certification and proudly bears the exclusive "KA" and "MA" coal safety marks designated for mining applications.

    MD-Type Horizontal Wear-Resistant Multistage Pump for Coal Mines

    The MD(P)-type self-balancing, high-pressure, wear-resistant multistage centrifugal pump for coal mines is an improved design based on the conventional D-type pump. It features a self-balancing mechanism that eliminates the need for traditional axial force balancing components and removes the conventional balance disc assembly. This innovative design makes it an excellent next-generation replacement for D- and DG-type multistage centrifugal pumps. The pump has already passed the national coal safety certification and proudly bears the exclusive "KA" and "MA" coal safety marks, specifically approved for mining applications. This pump is ideally suited for conveying medium-sized mine water containing up to 1.5% particulate matter with particle sizes no larger than 1.3 mm, and operating within a temperature range of -20°C to 80°C. In addition to its exceptional wear resistance, the pump boasts high efficiency, excellent cavitation performance, smooth and reliable operation, extended service life, and the ability to deliver high head at relatively low rotational speeds. Featuring a unique self-balancing, horizontal, multi-stage, highly efficient, and energy-saving design, the pump incorporates symmetrically arranged impellers, eliminating the need for a traditional balance disc system. As a result, the pump rotor experiences no axial movement, ensuring that the flow path remains perfectly aligned at all times—keeping the pump consistently operating within its optimal efficiency range. This design also contributes to a flat efficiency curve, enabling the pump to run smoothly for up to 8,000 uninterrupted hours without any failures. Moreover, the pump adopts an advanced modular design, enhancing the interchangeability of key components such as impellers, rotating parts, and other adjustable elements. Users can choose from a variety of materials, including HT200, QT600, ZG, 304, 304L, 316L, 317L, 904L, CD4, and many others, to meet diverse application requirements.

    MD(P)-Type Self-Balancing High-Pressure Wear-Resistant Multistage Centrifugal Pump for Coal Mines

          Product features of wear-resistant multistage centrifugal pumps for coal mines:

    1. The hydraulic model features advanced design, high efficiency, and a wide performance range.

    2. The pump operates smoothly with low noise.

    3. The shaft seal employs either a soft packing seal or a mechanical seal, ensuring safe and reliable sealing with a simple structure that allows for quick and convenient maintenance.

    4. The shaft features a fully sealed design, ensuring it remains free from contact with the medium, preventing corrosion and guaranteeing a long service life.

          Wear-resistant multistage centrifugal pump standard for coal mines:

    GB/T5657-95 "Technical Specifications for Centrifugal Pumps (Class III)"

    JB/T1051-93 "Type and Basic Parameters of Multistage Clear Water Centrifugal Pumps"

    GB/T3216-2005 "Hydraulic Performance Acceptance Tests for Rotary Power Pumps—Class 1 and Class 2"

    MT114-2005 "Multistage Centrifugal Pumps for Coal Mines"

    When the physical and chemical properties of the liquid being conveyed by the three models of multistage pumps designed for coal mines pose special requirements, the pump materials can also be customized according to specific user needs. By modifying the pump material (or the material of the pump’s wetted components), adjusting the sealing configuration, and incorporating an additional cooling system, these pumps can effectively handle hot water, oils, corrosive media, or even abrasive fluids. This ensures that the pump is perfectly matched to the physical and chemical characteristics of the liquid being transported. Notably, after material changes are made, the pump’s performance parameters and installation dimensions remain essentially unchanged compared to the original design.

    Previous:

    Self-Balanced Multistage Pump Structural Diagram

    Next:

    Horizontal Multi-stage Booster Pump

    Related Products