A fire assay crucible is a small, ceramic or metal container that is used in fire assay testing for the determination of precious metals such as gold and silver. It is typically made of materials with high melting points and low reactivity, such as porcelain or graphite.

The crucible is designed to withstand high temperatures, usually up to 1200°C, which allows for the complete fusion of the sample and the fluxes. The fusion process involves heating the sample in the crucible with a mixture of fluxes, typically lead oxide, litharge, and borax. This process helps to separate the precious metals from the impurities in the sample.

Fire assay crucibles are commonly used in mining and metallurgical laboratories, as well as in the jewelry industry. They play a crucial role in accurately determining the concentration of precious metals in various samples, which is essential for quality control and valuation purposes.

Product Description

Type: Refractory Material

Working Temperature: ≥ 1350ºC(Fire assay working temperature less than 1150ºC)

Application: Nonferrous industry,Fire assay laboratory,smelting plant,metal sample analysis.

Feature: High fire resistance,high density,good corrosion resistance,good thermal shock resistance,Long service life,no hanging residue,no permeable,no cracking.

Remark:Quality and specification can customize as requirement .

Physical and chemical indicators :

Fire resistance ≥ 1350ºC

Al2O3    45%-55%

SiO2:    38%-56%

FAQ

Why us?
* Professional manufacturer since 1997.
* Strict quality control on production process and tolerance.
* Free samples available
* Customized production based on your drawing or specification
* On-time delivery and reliable support and service
* Inventory available for quick shipment
* We keep confidentiality of all the drawings and business information between us.
Are you a trading company or a manufacturer?
* We are a manufaturer. 
Can you provide the free samples?
* Yes,we can offer free sample if we have it in stock,but the courier fee is to be collected.
Do you accept customized production based our specification?
* Yes,we offer OEM and ODM service. Just send us your drawing if you have it. If you don’t have a drawing, just tell us your idea, we will work out the drawing for you.

What's the delivery time?
* 7 working days for standard products 30 days for customized products. 
What is the MOQ?
* No limit to the quantity. We can offer the best proposal and solutions according to your condition.
What is the payment terms you accept?
* T/T,LC,Western Union,moneygram are acceptable.
How to deal with the faulty?
* Firstly, Our product are produced in strict quality control system and the defective rate will be less than 2%.
If there are problems with the product, we will provide free replacement.