Geomechanics.io

  • Free Tools
Sign UpLog In
Built byBoxcut Studio

Geomechanics.io

Geomechanics, Streamlined.

© 2026 Geomechanics.io. All rights reserved.

Geomechanics.io

CMRR-ioGEODB-ioHYDROGEO-ioQCDB-ioFree Tools & CalculatorsBlogLatest Industry News

Industries

MiningConstructionTunnelling

Company

Terms of UsePrivacy PolicyLinkedIn
    Projects
    Product
    Safety

    Valmet flotation valves: control stability and recovery insights for plant engineers

    November 6, 2026|

    Reviewed by Joe Ashwell

    First reported on International Mining – News

    30 Second Briefing

    Valmet slurry flow specialist Juha Häkkinen sets out how flotation performance hinges on stable level control, correct valve sizing and consistent aeration across conventional cells, columns and flash flotation circuits. He focuses on control-valve behaviour in slurry duties, including cavitation, erosion and hysteresis, and how poor valve selection destabilises froth depth and air–slurry mixing. The piece points to tighter valve control and tailored trim designs as practical levers to improve recovery and reduce reagent overuse in brownfield flotation plants.

    Technical Brief

    • Häkkinen stresses valve body and trim metallurgy selection to withstand erosive, particle-laden flotation slurries.
    • Positioner resolution and actuator sizing are treated as critical to avoid stick–slip and oscillatory level control.
    • Flash flotation circuits are flagged as especially sensitive to valve response lag, driving tighter control-loop tuning.
    • Column flotation sections require valves capable of very fine throttling at low openings without cavitation onset.
    • Maintenance regimes are oriented around early detection of trim wear, gland leakage and actuator backlash in slurry service.

    Our Take

    Valmet Flow Control’s role in flotation performance sits alongside its recent acquisition of Severn Group’s severe-service valve portfolio, signalling a push to cover both routine flotation duties and the most abrasive, high-pressure mining applications within a single supplier offering.

    The Zambia Copperbelt case in our database, where a concentrator upgraded to Valmet Neles NDX smart positioners in a copper flotation circuit, suggests that Valmet is increasingly using digital valve diagnostics to tackle reagent-driven instability and unplanned downtime rather than just supplying mechanical hardware.

    Geotechnical Software for Modern Teams

    Centralise site data, logs, and lab results with GEODB-io, CMRR-io, and HYDROGEO-io.

    No credit card required.

    • Save and export unlimited calculations
    • Advanced data visualisation
    • Generate professional PDF reports
    • Cloud storage for all your projects

    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

    Related Articles

    Ada Tepe mine waste benchmark: closure design and lessons for engineers
    Mining
    about 2 hours ago

    Ada Tepe mine waste benchmark: closure design and lessons for engineers

    Ada Tepe, Bulgaria’s first greenfield mine in over 40 years, has completed open-pit gold production and moved into rehabilitation, using dry-stack tailings and paste backfill to minimise conventional wet tailings storage. The Dundee Precious Metals operation was designed with filtered tailings deposition on a lined facility, progressive reclamation of waste rock dumps, and strict water recycling to limit discharge to local catchments. Its closure approach, including reshaping benches and re-vegetation to blend with the Rhodope Mountains terrain, is being positioned as a reference model for future EU mine waste projects.

    Mining
    about 2 hours ago

    Platinum Blasting at New Burton mine: blast design and control notes for planners

    Platinum Blasting Services has secured the drill-and-blast contract for Argo Natural Resources’ New Burton Mine in Queensland’s Bowen Basin, extending a relationship established through similar services at the Broadlea Mine over the past two years. The scope will cover production drilling and blasting for open-cut coal operations in one of Australia’s highest-intensity blasting regions, where tight control of vibration, overpressure and fragmentation is critical for nearby infrastructure and dragline/shovel productivity. For mine planners and geotechnical teams, continuity of a single blasting contractor across Broadlea and New Burton should simplify blast design benchmarking, wall control practices and reconciliation of fragmentation performance.

    Mining
    about 2 hours ago

    Epiroc–Aramine acquisition: aftermarket fleet support insights for mine engineers

    Epiroc has agreed to acquire France-based Aramine SAS, a specialist supplier of spare parts and related services for underground mining equipment headquartered in Aix-en-Provence. Aramine brings more than 50 years of underground mining experience, a workforce of about 65 employees and a global customer base spanning over 70 countries. The deal signals Epiroc’s push to deepen its aftermarket footprint, particularly in spares and service support for underground fleets where lifecycle costs and parts availability are critical.

    Related Industries & Products

    Mining

    Geotechnical software solutions for mining operations including CMRR analysis, hydrogeological testing, and data management.

    CMRR-io

    Streamline coal mine roof stability assessments with our cloud-based CMRR software featuring automated calculations, multi-scenario analysis, and collaborative workflows.

    HYDROGEO-io

    Comprehensive hydrogeological testing platform for managing, analysing, and reporting on packer tests, lugeon values, and hydraulic conductivity assessments.

    GEODB-io

    Centralised geotechnical data management solution for storing, accessing, and analysing all your site investigation and material testing data.

    AllGeotechnicalInfrastructureHazardsEnvironmental