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Fire Assay

What is Fire Assay ?

Fire assay is an analytical techmique usedin the determinaion of the qualty and purly of gold. This method dates back to ancient imes but has been refned and improved upon ove!the years.ire asay is an analyticaltechnique used inthe determinaion of the qualty and puityof gold. This method dates backto ancientimes buthas been refined and improvedupon over the years. Fire assay is an analyticaltechnique used inthe determination of the qualty and purity ofgold. This method dates back to ancient imes but has been refined and improved upon overthe years.

Fire Assay Process

Sample preparation

With Flux Dispensing and Mixing Devices, fire assay dosing and mixing can beachieved in a repeatable, traceable and operator-safe manner, while alsoincreasing laboratory productivity.

Fusion

The pulverized sample is weighed and mixed with a fluxing agent. Lead isadded as a collector. The sample is then heated in a fumace at about 1000degrees. During this process, the lead in the flux melts and collects the preciousmetals as it forms a low-melting-point alloy with them.

Cupellation

Following the fusion, the molten lead and the precious metals are placed in aporous cupel and reheated. The lead is absorbed by the cupel, leaving behinda bead composed of the precious metals. This is a critical step for purifying theprecious metals from the lead.

Weighing and Analysis

The resulting metal bead is weighed to determine the concentration of preciousmetals in the original sample. Further tests may be conducted to ascertain theexact content of gold and silver.

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Side view of DECENT Fire Assay Fusion Furnace, showcasing its compact design and robust construction

Fusion Furnace

Side view of DECENT Fire Assay Fusion Furnace, showcasing its compact design and robust construction

Fusion Furnace

DECENT Cupellation Furnace for precise gold and silver recovery

Cupellation Furnace

DECENT Cupellation Furnace for precise gold and silver recovery

Cupellation Furnace

DECENT High Temperature Cupellation Furnace for 1500C gold recovery

High Temperature Cupellation Furnace

DECENT High Temperature Cupellation Furnace for 1500C gold recovery

High Temperature Cupellation Furnace

DECENT Clay Crucible for fire assay melting

Clay Crucible

DECENT Clay Crucible for fire assay melting

Clay Crucible

DECENT Magnesia Cupel for fire assay gold analysis

Magnesia Cupel

DECENT Magnesia Cupel for fire assay gold analysis

Magnesia Cupel

DECENT Crucible Tumbler for automated fire assay sample preparation

Crucible Tumbler

DECENT Crucible Tumbler for automated fire assay sample preparation

Crucible Tumbler

DECENT Automatic Flux Dispenser for automated fire assay sample preparation

Automatic Flux Dispenser System

DECENT Automatic Flux Dispenser for automated fire assay sample preparation

Automatic Flux Dispenser System

DECENT Assay Litharge for gold and silver fire assay

Assay Litharge

DECENT Assay Litharge for gold and silver fire assay

Assay Litharge

DECENT Electric Crucible Loader for safe and efficient furnace charging

Electric Crucible Loader

DECENT Electric Crucible Loader for safe and efficient furnace charging

Electric Crucible Loader

DECENT Multiload and Multipour System for automated fire assay

Multiload and Multipour System

DECENT Multiload and Multipour System for automated fire assay

Multiload and Multipour System

DECENT Silicon Carbide Heater rod, glowing red hot in a high-temperature furnace

Silicon Carbide Heater

DECENT Silicon Carbide Heater rod, glowing red hot in a high-temperature furnace

Silicon Carbide Heater

DECENT Furnace Refractory Chamber interior lined with durable silicon carbide tiles

Furnace Chamber And Tile

DECENT Furnace Refractory Chamber interior lined with durable silicon carbide tiles

Furnace Chamber And Tile

Side view of DECENT Fire Assay Fusion Furnace, showcasing its compact design and robust construction
Fusion Furnace
The DECENT Fire Assay Fusion Furnace is an essential, high-temperature laboratory furnace designed for...
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DECENT Cupellation Furnace for precise gold and silver recovery
Cupellation Furnace
The DECENT Cupellation Furnace offers precise, high-temperature separation of precious metals...
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DECENT High Temperature Cupellation Furnace for 1500C gold recovery
High Temperature Cupellation Furnace
The DECENT High Temperature Cupellation Furnace is engineered for superior precious metal bead...
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DECENT Clay Crucible for fire assay melting
Clay Crucible
DECENT premium Clay Crucibles, engineered for unparalleled performance in high-temperature fire assay...
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DECENT Magnesia Cupel for fire assay gold analysis
Magnesia Cupel
The DECENT Magnesia Cupel is a high-purity, porous container indispensable for precise precious...
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DECENT Crucible Tumbler for automated fire assay sample preparation
Crucible Tumbler
Qingdao Decent Group Crucible Tumbler (also known as a Flux Mixer or Crucible Blender) is essential equipment...
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DECENT Automatic Flux Dispenser for automated fire assay sample preparation
Automatic Flux Dispenser System
The automatic flux dispenser system is a device that presets the dosage and accurately distributes the...
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DECENT Assay Litharge for gold and silver fire assay
Assay Litharge
DECENT Assay Litharge is a highly pure lead oxide specifically designed for the precise determination...
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DECENT Electric Crucible Loader for safe and efficient furnace charging
Electric Crucible Loader
The DECENT Electric Crucible Loader is an essential automated solution designed for safe, efficient,...
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DECENT Multiload and Multipour System for automated fire assay
Multiload and Multipour System
The DECENT Multiload and Multipour System is an integrated fire assay solution designed to enhance...
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DECENT Silicon Carbide Heater rod, glowing red hot in a high-temperature furnace
Silicon Carbide Heater
The DECENT Silicon Carbide Heater is a high-performance electric heating element designed to deliver...
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DECENT Furnace Refractory Chamber interior lined with durable silicon carbide tiles
Furnace Chamber And Tile
The DECENT Furnace Refractory Chamber and accompanying tiles are high-performance components crucial...
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Success Stories

Qingdao Decent Group Engineer, Lv Yuan Rui, leading a product training session in a conference room with a presentation screen in the background.
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A scientist in a lab coat holding a DECENT fire assay clay crucible, with a blurred laboratory background.
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A collage showcasing various types of clay crucibles, including white ceramic and dark graphite crucibles, used in laboratory and industrial settings
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QINGDAO DECENT GROUP consists of Decent Group Limited, Qingdao Decent Electromechanical Tech Co., Ltd., Qingdao Mars Labtech Co., Ltd. and Hunan Kilnsware Industrial Ceramics Co., Ltd.

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Decent Group Limited

Qingdao Decent Electromechanical Tech Co., Ltd.

Qingdao Mars Labtech Co., Ltd.

Hunan Kilnsware Industrial Ceramic Co., Ltd.

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  • Room 408 Huaren Building, No. 187 Zhuzhou Road, Laoshan District, Qingdao City, Shandong Province, China.

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