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

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    Case Study of Iron Ore Drainage System Renovation: Performance Breakthrough and Practical Application of Self-Balanced Multistage Centrifugal Pumps

    Publication Date:

    2025-09-14

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    In the field of deep mining in metal mines, the stability of the drainage system directly affects both production safety and operational efficiency. In this article, professionals holding both the Mine Safety Certificate and the Coal Safety Certificate Mining drainage pump Changsha Manufacturing Plant China United Pump Industry , taking a large domestic iron ore mine as an example 825 Taking the Mi Deep Well Drainage Project as an example, this article provides an in-depth analysis of the self-balancing method. Mining multi-stage centrifugal pump How can we overcome the challenges of drainage in high-lift, highly acidic environments through structural innovation, material upgrades, and intelligent management, thereby providing a scalable technical model for ultra-deep shaft iron mines?

     

    I. Mine Drainage Conditions and Limitations of Traditional Systems

    This iron ore mine employs " Shaft + Tape Inclined Shaft " Joint development approach, with mining depths reaching 825 Rice, with the maximum daily water inflow reaching 5000 Cubic meters, requiring full-head pumping to the surface treatment system. The mine area features complex hydrological conditions, with groundwater containing high concentrations of iron ions and particle sizes ≤ 2mm Iron oxide particles, pH As low as Around 5, It exhibits acidic corrosive properties, posing a severe challenge to drainage systems.

     

    MD Mining Wear-Resistant Multistage Pump

    Please click the image to learn about the model specifications and product details of Changsha Zoomlion Pump Industry's [MD Mining Wear-Resistant Multistage Centrifugal Pumps].

     

     

    Originally adopted MD The multi-stage centrifugal pump with a balance disc design faces three major operational challenges: First, Balance Disc The balance ring is prone to wear, leading to each 3 First, monthly shutdowns for maintenance create a production bottleneck; second, volume losses caused by the balancing of the return water pipeline reduce efficiency to only about... 65% First, energy consumption remains stubbornly high; second, the continuous erosion of flow components by highly acidic media significantly shortens the pump's lifespan; third, the persistent corrosive attack severely compromises the durability of critical parts. 2 Year, average annual maintenance costs exceed 20 Tens of thousands of yuan, severely impacting the implementation of the mining plan.

     

    II. Selection Optimization and Technological Breakthroughs for Self-Balanced Multistage Pumps

    Considering the characteristics of extreme operating conditions, the technical team selected [something] after conducting hydraulic model simulations and on-site tests. MD600-95*10P Self-balancing, wear-resistant, multistage centrifugal pump—this model features 10 The stage impellers are arranged symmetrically, with a designed head. 950 Rice, traffic 600 Cubic meter / Designed specifically for transporting high-solids, acidic media, this pump features a modular structure that allows flexible adjustment of the stage count based on the depth of extraction.

     

    Corrosion-resistant, Mine-Use Self-Balancing Multistage Centrifugal Pump

    Please click the image to learn about the model specifications and product details of Changsha Zoomlion Pump Industry's [Corrosion-Resistant Mining Self-Balancing Multistage Centrifugal Pumps].

     

    Structural innovation becomes the core of performance enhancement: Eliminating the traditional MD The pump's balance disc assembly achieves axial force self-balancing through the symmetrical arrangement of forward and reverse impellers, completely eliminating the risk of wear in balancing components and thereby extending the period of trouble-free operation. 3 More than doubled; optimized hydraulic flow channel design, eliminating the balance return piping, resulting in improved volumetric efficiency. 5-14% , energy consumption is significantly reduced.

    Targeted upgrade of the material system: The impeller is now made with 2205 Duplex stainless steel forging, verified in the lab, exhibits a lower corrosion rate in iron-ion-containing acidic media compared to conventional stainless steel. 8 Multiple; the pump casing is lined with a wear-resistant high-chromium cast iron layer (hardness HRC58-62 ), effectively resisting the erosion of iron oxide particles, extending the lifespan of flow components to 18 More than a month.

    Simultaneous enhancement of anti-cavitation performance: A low-cavitation-inducing impeller is added at the inlet to reduce the required net positive suction head (NPSH). NPSHr ) Control within 3.2 Within one meter; the integrated intelligent boosting device adjusts the inlet pressure in real time, ensuring it always remains higher than the medium's vaporization pressure, thereby completely eliminating cavitation issues under high-suction-head operating conditions.

    System Coordinated Optimization and Intelligent Operations & Maintenance System

    To fully leverage equipment performance, a system-wide compatibility upgrade will be implemented. The piping system will utilize double-phase stainless steel seamless steel pipes connected via flanges, with the pressure rating upgraded to 25MPa ; Pipeline slope precisely controlled within 3 °, Utilize the gravity effect to reduce iron oxide deposition and minimize the risk of pipeline blockage.

    Build " Perception - Diagnosis - Early Warning " Intelligent Management System: Deploy multi-parameter sensors—measuring vibration, temperature, and pressure—at critical points of the pump unit, combined with online pH The monitor captures the operational status in real time; data is then integrated into the mine's IoT platform, where a machine-learning-based fault prediction model is established. When bearing temperatures exceed… 85 Automatically triggers tiered alerts when ℃ or vibration amplitude is abnormal, with a technical response time starting from 48 The duration is shortened to 3 Hours.

     

    III. Transformation Outcomes and Comprehensive Benefit Analysis

    Through technological upgrades and management optimization, the drainage system has achieved a qualitative leap in performance. Implementing quarterly high-pressure water jet cleaning and standardizing inventory management of vulnerable components have significantly improved the equipment's overall efficiency. OEE ）From 62% Elevate to 89% ; A single pump operating independently can fully meet the well's drainage needs, replacing the original three-stage relay drainage system. As a result, the system's continuous operation time is now 500 Hours extended to 3200 More than an hour.

    Economic benefits have significantly improved: Annual electricity consumption has decreased. 28 Wandu, equivalent to electricity bill savings 22.4 Ten thousand yuan; maintenance costs average per year 80 Ten thousand yuan dropped to 32 Ten thousand yuan, with a decline of 60% ; Failure downtime rate decreases 75% , indirectly reducing mining disruption losses by over 300 Ten thousand yuan / Year.

    Environmental safety has been comprehensively improved: Leaks have been reduced through optimized sealing structures. 92% , completely eliminate the risk of acidic wastewater pollution; adopt low-noise design and vibration-damping foundations, reducing operational noise from 108dB Drop to 82dB , in compliance with GBZ2.2-2007 Occupational exposure limit requirements.

     

    IV. Technical Experience and Future Development Directions

    Project practice has led to three key principles for selecting drainage equipment for ultra-deep iron ore wells: First, the head design must include a margin of safety. 1.2 First, a doubled safety factor is required to cope with the increasing mining depth; second, material selection must simultaneously meet pH ≤ 3 Its acid resistance and solid particle abrasion requirements; third, prioritize the use of a self-balancing structure to maximize the maintenance-free operating period.

    Intelligent upgrades have become an inevitable trend, and big data analytics can help identify issues in advance. 80% The above potential failures, as iron ore mining shifts toward 1500 As the industry continues to deepen, the future will require a key breakthrough in the application of titanium-based composite materials (which can achieve 40% Weight reduction) and digital twin technology, building a virtual-real mapping system Intelligent Control System , providing core support for the construction of green and intelligent mines, Self-balanced Multistage Centrifugal Pump As a key piece of equipment for deep-mine drainage, its technological upgrade will continuously drive the mining industry toward cost reduction, efficiency improvement, and enhanced safety and environmental protection.

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