Order Code	Product Name
L-10-02-M04	PTFE Buchner Funnel for Mining Laboratory Corrosive Sample Filtration

PTFE Buchner Funnel for Mining Laboratory Corrosive Sample Filtration

Brief Introduction

The Split-type PTFE Buchner Funnel is a professional corrosion-resistant filtration tool designed for demanding mining laboratories, metallurgical testing and hydrometallurgical workflows. Manufactured from high-purity Polytetrafluoroethylene (PTFE), this funnel provides excellent chemical inertness, temperature adaptability and long-term structural stability under harsh filtration conditions.

Available in 60mm, 90mm and 110mm sizes with 90ml and 110ml capacity options, the PTFE Buchner funnel features an ultra-low friction and non-stick surface that reduces sample residue and minimizes cross-contamination. With stable performance from -196°C to 250°C, it is optimized for vacuum filtration of corrosive mineral samples, acid digestion solutions and complex mining laboratory liquids.

Application Scope

The PTFE Buchner Funnel is widely used in mineral sample preparation, metallurgical testing, elemental analysis and hydrometallurgical solution pretreatment. Its strong corrosion resistance makes it suitable for filtration tasks involving ore acid digests, hydrofluoric acid-containing solutions and corrosive slurry samples that may damage conventional glass or plastic filtration tools.

In hydrometallurgical laboratories, the funnel supports filtration of acidic, alkaline and chemically aggressive process solutions to remove solid impurities before analytical testing. It also adapts to repetitive filtration of organic solvents and complex mining waste liquids, helping laboratories maintain consistent sample purification procedures and stable analytical workflows.

Features

Superior Chemical Inertness Ensures Sample Integrity

Manufactured from high-purity PTFE material, the funnel provides strong resistance against strong acids, strong alkalis, hydrofluoric acid and various organic solvents commonly encountered in mineral digestion and leaching-related laboratory procedures. The non-stick low surface tension reduces sample adhesion and residue retention, helping minimize sample loss and cross-contamination during filtration.

Wide Temperature Adaptability Supports Reliable Operation

The PTFE Buchner Funnel supports a maximum working temperature of 250°C while maintaining mechanical toughness at low temperatures down to -196°C with 5% elongation retention. Its weather-resistant and anti-aging characteristics provide stable performance during long-cycle filtration operations under demanding chemical and temperature conditions.

Low Friction Surface Improves Laboratory Efficiency

The ultra-low friction PTFE surface allows smooth liquid flow and reduces residue accumulation during filtration of viscous corrosive mineral solutions. The non-stick design simplifies cleaning procedures, shortens maintenance time and improves batch sample pretreatment efficiency in mining and hydrometallurgical laboratories.

Standard Size Compatibility Supports Laboratory Workflows

Available in mainstream 60mm, 90mm and 110mm sizes, the split-type PTFE Buchner Funnel is compatible with conventional vacuum filtration systems and filter membrane configurations. It integrates smoothly into standardized mineral sample preparation, corrosive solution clarification and hydrometallurgical testing workflows.

Durable PTFE Construction Reduces Long-Term Costs

The corrosion-resistant, temperature-resistant and reusable PTFE structure extends service life and reduces replacement frequency caused by chemical degradation. Easy cleaning and long-term durability provide an economical filtration solution for frequent corrosive sample processing in mining laboratories.

Specification

• Product Name: Split-type PTFE Buchner Funnel

• Material: High-purity Polytetrafluoroethylene (PTFE)

• Available Sizes: 60mm, 90mm, 110mm

• Capacity Options: 90ml, 110ml

• Max Working Temperature: 250°C

• Low Temperature Toughness: Maintains 5% elongation at -196°C

• Core Performance: Strong chemical corrosion resistance, excellent weather resistance, ultra-low friction, non-stick surface

• Typical Application: Vacuum filtration of ore acid digests, hydrofluoric acid solutions and corrosive slurry samples for mining laboratory analysis

Why Choose FKN PANDA

FKN PANDA supplies high-purity Split-type PTFE Buchner Funnels designed for global mining laboratories, metallurgical testing facilities and hydrometallurgical research applications. Manufactured with premium PTFE materials, these funnels provide stable temperature resistance and chemical inertness for filtration of highly corrosive mining samples.

With complete size options and durable reusable performance, FKN PANDA PTFE funnels help stabilize sample pretreatment procedures, simplify cleaning operations and improve laboratory workflow efficiency. Their resistance to harsh chemical environments makes them reliable filtration tools for mining technical teams, laboratory operators and distribution partners worldwide.

90mm PTFE Buchner Funnel – FAQ

Q1. How to select PTFE Buchner funnel size for mineral digestion residue filtration in hydrometallurgy laboratories?

PTFE Buchner funnel selection should be based on sample volume, expected solid loading, chemical compatibility requirements, and the filtration workflow of the laboratory. For hydrometallurgical testing, the funnel size needs to match the amount of digestion residue or leaching residue generated during sample preparation while maintaining effective vacuum filtration. A 90mm PTFE Buchner funnel is commonly considered for laboratory-scale filtration tasks where chemical resistance and reliable solid-liquid separation are required. Selection should also consider filter paper diameter compatibility, vacuum filtration equipment configuration, and the need for repeatable processing across multiple mineral samples.

Q2. What factors should be considered when choosing 90mm PTFE Buchner funnels for aggressive chemical ore sample processing?

When selecting PTFE Buchner funnels for aggressive mineral sample processing, laboratories should evaluate chemical resistance, operating conditions, sample characteristics, and compatibility with existing filtration systems. PTFE material is often selected for workflows involving strong acids, alkaline solutions, or corrosive reagents because of its chemical stability. Mining laboratories should also consider the type of ore sample, residue particle characteristics, filtration frequency, and cleaning requirements. These factors help ensure the funnel can support consistent sample preparation from ore digestion and leaching tests through subsequent mineral analysis procedures.

Q3. How does PTFE material chemical resistance compare to glass for mineral testing laboratory vacuum filtration applications?

PTFE and borosilicate glass funnels are both used in laboratory filtration, but they serve different application requirements. PTFE Buchner funnels are often preferred when filtration involves aggressive chemical environments where corrosion resistance is a primary consideration. In mineral testing workflows, including hydrometallurgical residue filtration and acidic digestion processes, PTFE can provide compatibility with a wider range of chemical reagents compared with conventional glass equipment. The selection should be based on the specific chemicals involved, temperature conditions, filtration requirements, and laboratory operating procedures rather than material preference alone.

Q4. Can PTFE Buchner funnels be used for high-temperature acid leaching solutions in mining laboratory applications?

PTFE Buchner funnels can be considered for laboratory filtration applications involving chemically aggressive solutions, but suitability depends on the actual operating temperature, chemical composition, and filtration conditions. In hydrometallurgical testing, acid leaching residues may require materials that maintain chemical stability during sample separation. Before use with high-temperature solutions, laboratories should confirm the PTFE funnel specifications and ensure that the operating conditions are within the recommended range. Proper evaluation helps reduce risks during mineral processing experiments and supports reliable filtration results during metallurgical research workflows.

Q5. How to optimize vacuum pressure settings when using PTFE funnels for high-solids-content ore slurries?

Vacuum pressure optimization for PTFE Buchner funnel filtration depends on slurry characteristics, particle size distribution, solids concentration, and filter media selection. Excessive vacuum may compact the filter cake and reduce filtration efficiency, while insufficient vacuum can increase processing time. For high-solids-content ore slurries, laboratories typically evaluate the balance between filtration speed, cake formation, and sample recovery. Adjusting vacuum conditions according to the mineral sample properties helps improve consistency during ore preparation, flotation concentrate evaluation, and hydrometallurgical residue filtration workflows.

Q6. Which filter paper compatibility is required for 90mm PTFE Buchner funnels in mineral processing evaluation?

Filter paper selection for a 90mm PTFE Buchner funnel should match the filtration objective, including particle retention requirements, sample composition, and analytical method requirements. In mineral processing evaluation, different workflows may require different filtration characteristics, from coarse residue separation to fine particle retention before instrumental analysis. The filter paper diameter should properly fit the funnel filtration area to prevent bypass or sample loss. Selecting compatible filter media supports reliable solid-liquid separation during sample preparation steps before mineral testing, metallurgical evaluation, and analytical procedures.

Q7. How to ensure testing repeatability when using PTFE funnels across multiple aggressive acid digestion batches?

Testing repeatability depends on consistent filtration procedures, appropriate cleaning practices, and stable operating conditions. When PTFE Buchner funnels are used for multiple acid digestion batches, laboratories should control factors such as sample volume, filter media selection, vacuum conditions, and contamination prevention procedures. Proper cleaning between different ore samples helps reduce cross-contamination risks, especially in trace element analysis workflows. A standardized filtration protocol allows laboratory technicians to maintain consistency from sample preparation through mineral testing and supports more reliable comparison of metallurgical evaluation results.

Q8. What maintenance protocols reduce cross-contamination risks when using PTFE funnels for multi-element ore analysis?

Maintenance of PTFE Buchner funnels should focus on cleanliness, inspection, and proper handling procedures. After filtration of mineral digestion residues or leaching samples, laboratories should follow suitable cleaning methods based on the chemicals and sample types processed. Regular inspection can help identify physical damage, residue buildup, or changes that may affect filtration performance. For multi-element ore analysis, maintaining clean filtration equipment is important because sample contamination can influence analytical reliability. Consistent maintenance practices support continuous laboratory operation and repeatable mineral testing workflows.

Q9. How to integrate 90mm PTFE Buchner funnels into existing mineral testing laboratory workflows?

90mm PTFE Buchner funnels can be integrated into mining laboratory workflows as part of the sample preparation stage between chemical treatment and analytical testing. Typical applications include filtration of digestion residues, hydrometallurgical leach residues, and mineral processing samples before further analysis. Integration should consider compatibility with existing vacuum filtration systems, filter media requirements, and laboratory procedures. For new laboratory setup or equipment replacement projects, evaluating the funnel together with other filtration components helps create a consistent workflow from sample preparation to mineral testing and metallurgical evaluation.

Q10. What are the key differences between 90mm PTFE and larger PTFE funnels for high-volume metallurgical testing?

The main differences between 90mm PTFE funnels and larger PTFE funnels relate to filtration area, sample capacity, processing requirements, and laboratory workflow scale. A 90mm funnel is generally suitable for laboratory-scale filtration tasks where controlled sample handling and chemical resistance are important. Larger funnels may be considered when processing higher sample volumes or increased solids loading. The appropriate choice depends on the metallurgical testing requirements, expected sample throughput, available vacuum filtration equipment, and the need for efficient operation during continuous mineral laboratory activities.

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