Precision at its Finest: Elevate Your Lab Experiments with Global Lab Supplies
Bullion Blocks
Magnesia Bullion Block is a shallow, porous block with multiple holes, made from pure Magnesite, in which gold or silver can be refined or assayed by melting with a blast of hot air which oxidizes lead or other base metals.
Bullion Blocks are specifically designed to stand longer in the extreme heat of furnaces. These blocks are great heat conductors and high efficient to use.
These do not not crack or break over the course of time as well as demands no maintenance. Moreover, these Blocks are extremely durable and available in various specifications.
• With extremely low Gold and silver content, can get more accurate test results,
• High-temperature resistance and resistance to thermal shock
• Can be used 3-5 times for the crucibles for fire assay.
• Made of high-quality magnesia, Bone Ash, etc.
• Widely Used for smelting and assaying
• Free samples are available.
• High casting density.
Related Products
High Temperature Muffle Furnace
The maximum temperature of the Muffle Furnace 100 places muffle furnace can be adjusted up to 1500°C. The heating speed is very fast by silicon-molybdenum elements. On the lifting door of the high-temperature muffle furnace, there is also an observation window for watching the cupellation of lead buttons. Observation windows are equipped with fire-resistant glass, which can protect personnel from high-temperature radiation.
Lab Pulverizer Mill DP1000
GLS high-performance Pulverizer Mill, designed for efficient sample preparation. This industrial-grade equipment utilizes electric power to drive the mill platform, producing the desired mesh sample. With its robust construction and advanced features, our Pulverizer Mill is an ideal solution for various laboratory and industrial applications.
Zirconium Crucibles [low form]
Zirconium exhibits superb corrosion resistance in most organic and inorganic acids, salt solutions, strong alkalis and a few molten salts.
The passive oxide film (corrosion barrier) is stable in both reducing and oxidizing conditions. Zirconium is excellent in both acid and base solutions.
The temperature limit for use in air is
about 450˚C to 500˚C.
Electric Crucible/Pot Loader
• Simple operation and easy maintenance.
• Customized loading capacity meets clients’ various needs.
• 20/25/42/50/84 pots loading capacity, compatible with multipour and multiload system.
• A maintenance-free battery with a 5-year warranty.
• A built-in charger for fast and convenient charging.
Zirconium Crucibles [straight wall]
Zirconium is our most effective crucible material for fusions using sodium carbonate or sodium peroxide. It is an excellent low-cost replacement for platinum. And, based on an average of 100 fusions per crucible, it is more cost effective than less expensive porcelain or steel crucibles.
Other advantages of zirconium are its complete resistance to the action of most solvents of all concentrations such as nitric, hydrochloric, sulfuric and perchloric acids.
This allows the fusions to be dissolved out of the crucible completely with little or no contamination of the sample. Alkaline solvents such as ammonium hydroxide, acetate sulfide, carbonate and (Na, K) hydroxide, sulfide, carbonate and cyanide are also without effect.
Crucible Tumbler
GLS’s crucible tumbler is a new type of forward and reverse rotating mixing equipment. The crucible tumbler is mainly used for batch mixing of fire assay mineral samples and fluxes. The device can mix up to 50 fire assay crucibles at a time. This significantly improves the efficiency of laboratory sample preparation and reduces manual operations. It is one of the necessary equipment for fire assay laboratory.
The lengthy time required for fire assaying of gold, silver and precious metals can often be compensated for by the simultaneous analysis of a large number of samples. A typical fire assay laboratory is usually equipped with several furnaces and cupellation furnaces, each capable of collecting multiple samples. Therefore, GLS’s Multiple Sample Load Forklift, Crucible Tumbler and other equipment have greatly improved the efficiency of laboratory sample preparation and load-and-unload.
Magnesia Cupel
Cupel is a shallow, porous crucible with approximately 96% magnesia. It is especially used to separate gold, silver, and precious metals from lead buckles in the process of Pb-Fire assay. By using high-quality raw materials and scientific formulas, GLS’s fire assay magnesia cupel has a smooth surface, high mechanical strength, and will not crack and pit during high-temperature cupellation.
