Category
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Order Code |
Product Name |
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L-01-09-M06 |
Graphite Digestion Instrument for Mining Laboratory Sample Preparation | FKN PANDA |
The Graphite Digestion Instrument is a precision wet digestion pretreatment system designed for inorganic sample processing in mining, metallurgical, and environmental laboratories. Using far-infrared radiation graphite conduction heating and microprocessor intelligent control technology, this equipment provides fast, uniform, and stable high-temperature digestion for ore, mineral, and metallurgical samples.
The graphite heating structure helps reduce acid consumption and minimize cross-contamination risks during digestion procedures. Supporting conventional open digestion, microwave digestion pretreatment, and acid removal processes, it is suitable for analytical workflows involving AAS, AFS, and ICP-AES detection. With PID temperature regulation, corrosion-resistant construction, and multiple safety protection functions, the instrument supports standardized mineral sample preparation and laboratory elemental analysis.
The Graphite Digestion Instrument is widely used in mining assay laboratories, metallurgical testing centers, hydrometallurgical laboratories, and industrial material testing institutions for wet sample pretreatment applications.
The instrument performs high-temperature acid digestion of ores, tailings, and mineral concentrates, converting solid mineral samples into liquid solutions for subsequent elemental analysis and component determination.
For hydrometallurgical evaluation workflows, the equipment supports pretreatment of leaching solution samples, slag residue analysis, and metallurgical raw material impurity testing, providing consistent sample preparation for laboratory process evaluation.
The system is also suitable for environmental geological sample testing and standardized batch digestion experiments where stable pretreatment conditions are required.
Equipped with far-infrared graphite conduction heating technology and a PID temperature control system, the instrument provides rapid temperature increase and stable temperature output. Minimal temperature deviation between digestion positions helps maintain consistent sample reaction conditions.
The heating module uses isostatically pressed high-purity ultrafine graphite material with excellent thermal conductivity and temperature uniformity, reducing errors caused by uneven heating during digestion procedures.
The graphite surface features Teflon anti-corrosion treatment, providing resistance against strong acid and alkali environments during long-term wet digestion operations while helping protect equipment stability and sample integrity.
Available with multiple digestion hole configurations from 6 to 60 holes, the instrument supports flexible batch processing requirements for mineral testing laboratories and metallurgical analysis workflows.
The double-layer suspended inner chamber structure improves heat dissipation performance and helps prevent chassis overheating during continuous laboratory operation.
Built-in over-voltage, over-current, and overheating protection systems, together with an over-temperature alarm function, provide additional safety support for routine laboratory operation.
The self-tuning temperature adjustment system simplifies operation and helps standardize digestion procedures across different laboratory operators.
| Number of Holes | Hole Diameter | Hole Depth | Temperature Range | Temperature Accuracy | Over-temperature Alarm | Power Supply | Weight | Dimensions (L×W×H) |
|---|---|---|---|---|---|---|---|---|
| 6 | 42 mm | 45 mm | RT–280°C | ±0.1°C | Yes | 220V / 50Hz | 8 kg | 40×28×13 cm |
| 12 | 42 mm | 90 mm | RT–280°C | ±0.1°C | Yes | 220V / 50Hz | 12 kg | 49×41×13 cm |
| 24 | 42 mm | 90 mm | RT–280°C | ±0.1°C | Yes | 220V / 50Hz | 15 kg | 50×41×13 cm |
| 48 | 18 mm | 90 mm | RT–280°C | ±0.1°C | Yes | 220V / 50Hz | 15 kg | 50×41×13 cm |
| 60 | 18 mm | 90 mm | RT–280°C | ±0.1°C | Yes | 220V / 50Hz | 15 kg | 50×41×13 cm |
An optional waste gas neutralization system is available for condensation, neutralization, and drying treatment of acidic exhaust gas generated during digestion procedures.
FKN PANDA Graphite Digestion Instrument provides consistent digestion conditions through uniform graphite heating and ±0.1°C temperature control. Stable pretreatment performance helps laboratories prepare reliable sample solutions for AAS, AFS, and ICP-AES elemental analysis.
The high-purity graphite heating components and corrosion-resistant surface treatment are designed for demanding acid digestion environments. Integrated electrical and temperature protection systems support stable continuous operation and reduce unexpected interruptions.
Multiple hole configurations allow laboratories to select suitable batch processing capacity according to testing requirements. Rapid heating and intelligent temperature management simplify digestion procedures and improve sample preparation efficiency.
The instrument supports mineral digestion, hydrometallurgical sample pretreatment, and acid removal procedures, integrating with standardized workflows in mining and metallurgical laboratories.
Durable corrosion-resistant materials and optimized structural design help extend equipment service life while reducing maintenance requirements and daily operational costs.
Q1. How to select a graphite digestion system for a high-throughput mineral analysis laboratory?
Selecting a graphite digestion system requires evaluating laboratory workload, sample types, digestion methods, and integration requirements with downstream analytical instruments. For mining laboratories, key considerations include digestion capacity, temperature control capability, compatibility with commonly used acid digestion procedures, and operational stability during continuous sample preparation. The system should support the laboratory workflow from sample preparation to mineral analysis, including applications such as ICP-OES or ICP-MS testing. For new laboratory setups, expansion projects, or equipment replacement, selection should be based on current testing requirements and future analytical demand.
Q2. How does graphite block temperature uniformity affect digestion completeness of mineral samples?
Temperature uniformity within the graphite block directly influences heat transfer consistency between digestion tubes and samples. In mineral testing applications, stable thermal conditions help maintain repeatable digestion reactions, especially when processing complex ore matrices such as sulfide ores, lithium minerals, or polymetallic samples. Uneven heating may lead to incomplete digestion, inconsistent reaction rates, or variations between sample batches. A well-designed graphite digestion system supports controlled sample preparation procedures, improving the reliability of analytical results obtained during mineral characterization and metallurgical evaluation.
Q3. What factors should be considered when choosing acid digestion tube capacity for ore sample preparation?
Digestion tube capacity should be selected according to sample quantity, acid volume requirements, laboratory throughput, and analytical objectives. Mining laboratories must balance processing efficiency with proper reaction conditions, as oversized tubes may reduce heating efficiency while insufficient capacity may limit sample handling flexibility. The selection should also consider the types of mineral samples being analyzed, including ores, concentrates, and metallurgical products. Proper tube configuration helps maintain consistent digestion conditions and supports reliable preparation workflows before instrumental analysis.
Q4. Can a graphite digestion system be used for complex mineral samples in metallurgical testing?
Graphite digestion systems are commonly applied in mineral laboratories for preparing various geological and metallurgical samples before elemental analysis. Their suitability for complex samples depends on factors such as mineral composition, acid chemistry, digestion procedure, and required analytical method. Applications may include ore samples, concentrates, and process materials used in metallurgical studies. Laboratory personnel should establish appropriate digestion protocols based on sample characteristics to achieve effective dissolution and minimize issues such as incomplete reaction or residue formation.
Q5. How does programmable temperature control improve digestion consistency in mining laboratories?
Programmable temperature control allows laboratories to establish repeatable heating profiles for different sample types and digestion procedures. During mineral sample preparation, controlled temperature ramping and holding stages help maintain consistent reaction conditions and reduce variation between batches. This is particularly valuable for laboratories handling diverse materials such as copper concentrates, lithium ores, rare earth minerals, and other geological samples. By standardizing digestion procedures, laboratories can improve workflow consistency and support more reliable analytical results for mineral testing and process evaluation.
Q6. What are the differences between graphite block digestion and microwave digestion for mineral sample preparation?
Graphite block digestion and microwave digestion use different heating principles and operational approaches for sample decomposition. Graphite digestion systems provide controlled conductive heating and are commonly used for batch processing in mining laboratories, while microwave systems rely on microwave energy under specific pressure conditions. The appropriate choice depends on sample characteristics, required throughput, digestion methods, and laboratory operating preferences. For routine mineral analysis workflows, graphite systems can provide a practical solution for standardized sample preparation when suitable digestion procedures are established.
Q7. How to prevent sample cross-contamination when processing multiple ore types in a graphite digestion system?
Preventing cross-contamination requires proper laboratory procedures, including suitable digestion tube selection, thorough cleaning practices, controlled sample handling, and separation of incompatible sample batches when necessary. In mining laboratories analyzing different ore types, contamination control is important because trace element analysis may be affected by residual materials from previous samples. Regular inspection of digestion components and standardized preparation protocols help maintain analytical reliability. Good laboratory management practices ensure that the digestion process supports accurate mineral testing results.
Q8. What maintenance procedures are required for graphite digestion systems used in continuous laboratory operation?
Routine maintenance of a graphite digestion system focuses on maintaining stable heating performance, protecting the graphite block, checking temperature control components, and inspecting digestion accessories. Long-term laboratory operation requires regular cleaning, proper handling of tubes, and monitoring of wear or chemical exposure effects. Maintenance schedules should be established according to operating frequency, sample types, and laboratory conditions. Proper equipment care helps maintain consistent digestion performance and reduces operational interruptions during continuous mineral analysis workflows.
Q9. How can a graphite digestion system be integrated into a complete mineral analysis workflow?
A graphite digestion system can be integrated into mining laboratory workflows as a sample preparation stage before instrumental analysis. Typical processes include sample collection, drying, crushing, homogenization, digestion, and subsequent elemental measurement using analytical techniques such as ICP-OES or ICP-MS. When planning laboratory expansion or equipment replacement, integration considerations include sample throughput, operator workflow, safety requirements, and compatibility with existing analytical procedures. Proper integration helps create a more efficient and standardized mineral testing process.
Q10. What factors should be considered when setting up a graphite digestion station in a new metallurgical laboratory?
Establishing a graphite digestion station requires consideration of laboratory workflow, sample preparation requirements, ventilation conditions, safety procedures, and compatibility with analytical equipment. The configuration should match the expected sample types, digestion methods, and testing volume of the laboratory. For new mining laboratories or metallurgical research facilities, planning should focus on creating a reliable preparation environment that supports accurate mineral testing and process evaluation. Appropriate equipment selection and operational procedures help ensure stable long-term laboratory performance.
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