Mining & Mineral Processing

CGIS has been an active valve distributor in the mining industry for 40 years. From abrasive and erosive services during milling and concentration to corrosive services in process plants, CGIS has a lineup of valves and actuators that can help improve the efficiency of your operation.
Environmental, Social, and Governance

ESG Objectives

The mining industry is recognizing ESG performance now more than ever. These criteria directly impact mining and mineral processing organization’s ability to conduct operations, acquire funding, and remain in good standing with the communities they impact.

Environmental, Social, and Governance (ESG) Objectives

Mineral Processing

At a high level, the input of the mining process is clean (ore), and the output is clean (separated minerals). It is the processing stage where harsh procedures and chemicals are required. Any leakage, emissions, or discharges at this stage equates to a loss of valuable material and exposes staff and the environment to danger.

One major area for immediate improvement, in terms of sustainability and efficiency, revolves around a common mining valve — the Push Through Knife Gate. This valve is fundamentally flawed for severe service applications as every closure of the valve releases discharge to the atmosphere. 

These discharges grow in volume after each cycle as the valve continues to wear down. ​Unsurprisingly, the valve also has a short lifespan; the resulting manufacturing and shipping costs cannot be overlooked.

Case Study

CO2 Emission Comparison Between Knife Gate Valves

We compared a DSS Severe Service Knife Gate Valve (SSKGV) to a Push Through Knife Gate Valve. Both units were in the same mining application, positioned four kilometers from the operations facility. The Push Through Valve and DSS SSKGV required maintenance after 160 and 884 cycles respectively.

When analyzing the CO2 emissions from the manual transmissioned diesel service vehicle, it was found that servicing the Push Through Valve equated to over five times the carbon emissions, not to mention increased service costs and a much shorter service life of the valve.

Mineral Processing Site — Mining

Asking the right questions

Our valve experts know how vital it is to understand each application fully. As a result, we are always working hard to ensure we are asking the right questions to understand your specific situation.

In the mining industry, we’ve learned from 40 years of experience that the differentiation and complete understanding of mining processes can mean the difference between a faulty valve needing regular replacement and a perfect fit valve protecting you from millions in downtime costs.
CGIS’ line-up of premium valve manufacturers features Severe Service Valves that can safeguard you from the inevitable risks that come with working in severe service applications. Some of these applications include, but are not limited to:
  • Mineral Processing
  • Chloride Leaching
  • Paste Backfill
  • Tailings Distribution
  • Smelting
Case Study

Proving the Lowest Cost of Ownership

Since their implementation into the tailings market, the design behind Severe Service Knife Gate Valves has been improved over time.

In this example, the overall valve cost has been reduced from ~$100,000 per year for the original valve (not an SSKGV) to $14,000 per year. The reason being? Extended valve life and dependability.

Typical conditions at this facility: 3 lines, Class 300.
  • Tonnage rate: 5000 mtph sand
  • Density: 1.45–1.50 SG slurry
  • Particle size: D50 = 160–200 micron
  • Top size: 65mm
  • Pressure: 25 to 40 bar

mtph = metric tonnes per hour
mtpd = metric tonnes per day
mtpy = metric tonnes per year
Velocity: +5 m/s (up to 8 m/s)

DSS Valves -SSKGV —Lowest Cost of Ownership
Class 300 SSKGV Tailings Analysis


El Teniente Lime Plant
Problems with the Push-Through Knife Gate design
The Advantages of SSKGVs in Hydrometallurgy
Valve Evolution in Hydrometallurgy

Featured Mining & Mineral Processing Valve Manufacturers

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