Category
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Order Code |
Product Name |
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L-01-10-M06 |
Laboratory Fire Assay Bullion Roller for Precious Metal Sample Preparation |
The FKN PANDA Fire Assay Bullion Roller is a compact laboratory rolling machine specifically designed for precious metal processing in mining and metallurgical laboratories. It is used for thinning gold, silver, platinum, copper, and other noble metal samples obtained from cupellation and fusion processes.
Featuring hardened chrome steel rolls and manual thickness adjustment, the equipment provides stable rolling performance and uniform thickness reduction. It supports standardized bullion sample preparation for fire assay analysis, purity testing, and metallurgical evaluation while maintaining reliable operation during routine laboratory workflows.
The Fire Assay Bullion Roller is widely applied in mining assay laboratories, precious metal refineries, metallurgical testing centers, and geological analysis facilities.
In fire assay workflows, the equipment rolls bullion buttons produced through ore fusion and cupellation into thin, uniform sheets. The prepared samples are suitable for subsequent purity testing, verification procedures, and elemental determination.
In metallurgical testing applications, it processes precious metal samples obtained from smelting trials, concentrate evaluation, and hydrometallurgical experiments, helping maintain consistent sample geometry for analytical comparison.
The machine is also suitable for laboratory research involving gold, silver, platinum group metals (PGMs), copper, and other precious or rare metals, supporting quality control and repeatable sample preparation.
The machine is equipped with high-hardness chrome steel rolls that provide smooth rolling surfaces and stable pressure distribution. This design helps produce uniform metal sheets while reducing surface damage or contamination risks during precious metal sample preparation.
Manual screw adjustment allows operators to set the required rolling thickness according to testing requirements. The maximum precise thickness control reaches 0.1 mm, supporting consistent sample preparation for analytical procedures.
The Fire Assay Bullion Roller supports rolling of gold, silver, platinum, copper, and other precious and rare metals, providing flexible application options for fire assay laboratories and metallurgical testing facilities.
The compact mechanical structure enables straightforward operation and long-term laboratory use. Dry cloth cleaning of roll surfaces helps maintain surface quality and avoid moisture-related contamination affecting metal sample preparation.
Designed for professional laboratory environments, the unit requires limited installation space and supports convenient integration into existing fire assay and metallurgical sample preparation workflows.
| Parameter | Specification |
|---|---|
| Diameter of Roll | 70 mm |
| Voltage | 220V / 50Hz |
| Power | 1.5 kW |
| Total Width of Roller | 140 mm |
| Smooth Working Width | 140 mm |
| Maximum Precise Thickness | 0.1 mm |
| Roll Material | Chrome Steel |
The FKN PANDA Fire Assay Bullion Roller provides reliable testing repeatability through controlled rolling pressure and durable chrome steel rolls. Uniform thickness reduction helps maintain consistent sample conditions and supports dependable analytical results in fire assay and metallurgical testing.
It delivers strong operational reliability with a robust mechanical structure and wear-resistant rolling components. Designed for frequent laboratory operation, the equipment maintains stable performance during continuous precious metal sample preparation procedures.
The machine improves laboratory efficiency by simplifying bullion thinning operations and reducing manual preparation time. Its compact structure and easy operation allow laboratories to process samples efficiently within existing workflows.
It offers excellent mining workflow compatibility by integrating directly with standard fire assay procedures, including fusion, cupellation, bullion preparation, and analytical testing processes.
With durable construction, low maintenance requirements, and long service life, the FKN PANDA Fire Assay Bullion Roller provides a practical and economical sample preparation solution for global mining, assay, and metallurgical laboratories.
Q1. What factors should be considered when selecting a fire assay roll mill for a precious metals testing laboratory?
Selection of a fire assay roll mill should consider laboratory workload, bead processing requirements, roller adjustment capability, mechanical stability, maintenance needs, and compatibility with the laboratory’s analytical workflow. The equipment should support consistent preparation of gold-silver beads after cupellation before acid parting and final gravimetric determination. For new laboratory setup, expansion, or equipment replacement, laboratories should evaluate sample volume, operator requirements, bead characteristics, and integration with existing fire assay procedures to ensure reliable operation throughout the precious metals testing process.
Q2. How does roll mill precision affect gold-silver bead thickness consistency for fire assay parting analysis?
Roll mill precision directly influences the uniformity of gold-silver bead thickness before acid parting. Consistent thickness allows more predictable exposure during parting procedures and helps reduce variations caused by uneven mechanical preparation. In precious metals laboratories, controlled bead rolling is an important step between cupellation and final gold bead weighing. A stable roll mill design with accurate adjustment mechanisms supports repeatable preparation conditions, helping laboratory technicians achieve more consistent analytical workflows for gold and silver assay applications.
Q3. How to optimize roller gap settings for achieving uniform bead thickness across varying alloy compositions?
Optimizing roller gap settings requires consideration of bead size, alloy composition, hardness, and the required thickness for subsequent parting procedures. Different gold-silver ratios and bead characteristics may require adjustment of the rolling process to avoid excessive deformation or cracking. Laboratories typically establish suitable settings through controlled evaluation using representative samples. Proper adjustment helps ensure that beads are processed consistently, supporting reliable fire assay results and reducing variability during precious metal recovery and determination procedures.
Q4. What problems can occur when uneven rolling causes silver dissolution inconsistency during acid parting?
Uneven rolling may produce beads with inconsistent thickness, which can affect the efficiency and uniformity of silver dissolution during acid parting. Thicker or irregular areas may require different reaction conditions compared with evenly prepared beads, potentially influencing the final gold bead recovery process. In fire assay laboratories, consistent mechanical preparation is essential for maintaining analytical repeatability. A properly selected and maintained roll mill helps improve bead preparation consistency before chemical treatment and final precious metal measurement.
Q5. What are the differences in parting accuracy between machine-rolled and manually hammered fire assay beads?
Machine-rolled beads generally provide more consistent thickness and shape compared with manually hammered beads, where results may depend more heavily on operator technique. Uniform bead preparation can support more controlled acid parting conditions and improve workflow standardization in laboratories handling multiple fire assay samples. Manual methods may still be suitable for lower-volume applications, while motorized roll mills are often considered when laboratories require improved repeatability, higher throughput, or reduced operator variation during precious metal analysis.
Q6. How does roller surface finish affect contamination risk for trace gold determination in fire assay analysis?
Roller surface condition can influence contamination control during fire assay bead processing, particularly when laboratories handle samples with different grades or precious metal compositions. A suitable roller surface should support smooth bead movement while minimizing material transfer between samples. Regular cleaning and proper maintenance procedures are important to preserve analytical integrity. For trace gold determination, laboratories should establish cleaning practices between sample batches and monitor roller condition to reduce potential contamination risks during continuous operation.
Q7. What maintenance is required for a fire assay roll mill used in continuous laboratory operation?
Regular maintenance of a fire assay roll mill should include inspection of rollers, bearings, adjustment mechanisms, alignment, and surfaces that contact assay beads. Continuous operation in mining laboratories may expose mechanical components to repeated loading and fine metallic residues, making routine checks important for stable performance. Maintenance schedules should follow equipment requirements and laboratory operating conditions. Proper upkeep helps maintain consistent bead preparation quality, reduce unexpected downtime, and support continuous precious metals testing workflows.
Q8. How does bead rolling uniformity affect final gold weight determination accuracy in gravimetric fire assay?
Bead rolling uniformity contributes to consistent preparation before the final gold weighing stage in gravimetric fire assay. When beads have similar thickness and shape, acid parting conditions can be applied more consistently, helping reduce preparation-related variation. Since gravimetric determination depends on accurate recovery and measurement of the final gold bead, controlled mechanical preparation is an important part of the overall analytical workflow. A reliable roll mill supports repeatable processing from cupellation through final assay evaluation.
Q9. What factors should be considered when installing a fire assay roll mill in a new precious metals analysis laboratory?
When installing a fire assay roll mill in a new laboratory, factors such as workflow layout, sample throughput, operator access, maintenance space, and connection with other fire assay equipment should be considered. The roll mill should be positioned as part of the complete process from sample preparation and fusion to cupellation, parting, and final analysis. Laboratory managers should also consider future expansion requirements and equipment compatibility to create an efficient and organized precious metals testing environment.
Q10. When should a precious metals laboratory upgrade from manual hammering to a motorized fire assay roll mill?
A laboratory may consider upgrading from manual hammering when sample volume increases, preparation consistency becomes difficult to maintain, or operator-dependent variation affects workflow efficiency. Motorized roll mills can support more standardized bead preparation for laboratories performing frequent gold and precious metals assays. Before upgrading, laboratory managers should evaluate current testing requirements, sample throughput, quality control needs, and integration with existing fire assay procedures. The objective is to establish a more controlled and repeatable preparation process for reliable analytical operations.
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