JKL MLVM Vertical Pressurized In-Line Sampler with Internal Static Mixers

The JKL MLVM Vertical In-Line Pressurized Sampler with Internal Static Mixers is engineered for the continuous and representative sampling of mineral slurries in vertical pressurized pipelines. The system ensures a high degree of slurry homogenization prior to increment extraction, thereby enhancing statistical representativeness.

This model has been developed by JKL Mineral Dressing in accordance with the principles of Modern Sampling Theory (Pierre Gy) and international best practices for concentrate and slurry sampling. The design ensures reduction of the Fundamental Sampling Error (FSE) and minimization of segregation and grouping errors.

1. Operating Principle

The JKL MLVM is installed in a vertical slurry pipeline operating under positive pressure and turbulent flow conditions. The system incorporates:

• Internal chamber with helical static mixers
• Forced homogenization zone
• Central-axis lateral sampling take-off

The internal static mixers generate a controlled turbulent flow regime, eliminating concentration gradients, particle size segregation, and differential settling effects. This ensures that the extracted fraction is statistically representative of the total slurry stream.

The primary sample is withdrawn in the same flow direction, from the zone of maximum homogeneity, reducing sampling bias and maintaining minimal statistical error for a static-cut sampling system.

2. Main Technical Specifications

• Installation type: Vertical pressurized pipeline
• Operating condition: Turbulent slurry flow regime
• Sampling method: Continuous proportional extraction
• Internal mixing elements: Abrasion-resistant helical static mixers
• Flanges: ANSI B16.5 Class 150 or higher (as required by process pressure rating)
• Body material: ASTM A53 Grade B / ASTM A36 carbon steel
• Internal lining: Natural rubber (abrasion-resistant) or polyurethane (optional)
• Flush connection: Auxiliary port for water flushing and cleaning
• Typical diameters: According to process design (12″–24″ or larger upon engineering specification)

3. Equipment Components

1. Inlet flange
2. Homogenization chamber with internal static mixers
3. Internal abrasion-resistant lining
4. Y-type lateral sampling branch
5. Outlet flange
6. Inspection and maintenance port
7. Optional wash water connection

4. Technical Advantages

✔ Significant improvement in slurry homogenization prior to sampling
✔ Minimizes particle size and density segregation
✔ Reduces Fundamental Sampling Error (FSE)
✔ High resistance to abrasion and corrosion
✔ Low maintenance (no internal moving parts)
✔ Heavy-duty design for continuous 24/7 operation
✔ Easy disassembly for inspection and liner replacement

5. Typical Applications

• Hydrocyclone feed lines
• Mill discharge lines
• Final concentrate pipelines
• Tailings
• Flotation feed
• Secondary grinding circuits

Particularly recommended at critical sampling points where representativeness directly impacts:

• Metallurgical accounting
• Process control
• Metallurgical balancing
• Concentrate settlement and commercial reconciliation

6. Design Basis and Standards

The MLVM model is designed in accordance with:

• ISO 11794 – Mechanical sampling of slurries
• ISO 12743 – Sampling procedures for metals and moisture determination
• Pierre Gy’s Theory of Sampling (TOS)

Although classified as a static-cut sampling system, the incorporation of internal static mixers enables statistical performance approaching ideal homogeneous flow sampling conditions.

7. Strategic Benefit for Mining Operations

In processing plants where ore or concentrate is purchased from third parties (small-scale or artisanal miners), sampling reliability is critical. The JKL MLVM provides:

• Greater transparency in grade determination
• Reduction of analytical disputes
• Increased reliability in metallurgical balances
• Full traceability and repeatability of the sampling process