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Product Introduction

laboratory equipment high temperature fire assay crucible we manufactured are made with a scientific mix of high-quality materials and are carefully crafted. The clay crucibles have high mechanical strength and thermal shock resistance. It can usually be reused up to five times.

All our products are produced using fully automated equipment ensuring the consistent delivery of high- quality products.

Drill core samples (or others) are received at the laboratory, crushed, milled and dried in the oven. Samples are then separated into bags, tagged and weighed.


Next, the samples are prepared for the fusion process, which requires a reducing environment and so the samples are mixed with flux, a carbon source (coal dust) and litharge (PbO).


The samples are then placed into a fusion/ refractory crucible, ready to go into the furnace. The high tempareture (1000 – 1200°C) melts the sample while the flux fuses with the gangue (non-precious material) and the now liquid lead collects all the precious metals. The newly-formed Pb-Au-Ag-PGE concoction migrates to the bottom of the crucible due to its high density.

As cooled lead sample is then separated from the glass waste (slag) with a hammer, and placed in a porous bone ash (MgO) crucible, ready for the cupellation step.


The sample is then placed in a muffle furnace at around 1000°C. The lead oxidises with the aid of the inflowing air from the furnace muffle and then immediately melts and is absorbed into the crucible, leaving behind what is known as a precious metal prill.


The prill is then analysed for its precious metal content through dissolving it in aqua regia (a mixture of hydrochloric and nitric acid) and the concentrations determined by spectroscopic methods (AAS, ICPAES, ICPMS).


Eventual detection limits are in the region of parts per billion but accuracy is usually in the region of 3 -5% for this metallurgical analytical technique.


Chemical Composition

SiO2

54.6%

Al2O3

40.31%

Fe2O3 

1.11%

TiO2

0.47%

CaO

1.28%

MgO

0.34%

K2O

0.61%

Na2O

0.39%

L.O.I(loss on ignition)

0.21%

Applications

Precious Metal Analysis

Mining Laboratory

Laboratory Testing

Mineral Assaying

Fire Assaying

Gold Assaying

Item:

Fire assay crucible

Process Type:

Rolling molding

Material:

SiO2 + Al2O3

Tolerance:

+-2mm

Facility:

Automatic molding equipment 

Certificates:

ISO 9001    SGS 

Shipping:

Many stocks , delivery time around 5-10days . by sea or by air as customer request 

Delivery & Service:

Timely delivery each time. Provide reliable service and responsible for each customer with each product. Our target is to satisfy every customer with the best service.


Item

OD

(mm)

Height

(mm)

Capacity

(ml)

Wooden Case Dimension (mm)

Qty/Case

(pc)

Qty/20’FCL

(pc)

XTL-30g

88

110

250

1070*1070*1080

2310

46200

XTL-40g

88

135

350

1110*1070*1080

1980

39600

XTL-45g

88

160

500

1080*1170*1080

1296

25920

XTL-45g

90

155

680

1140*1030*1120

1296

25920

XTL-50g

105

150

700

1140*1030*1120

1530

30600

XTL-65g

105

165

720

1140*1030*1120

1425

28500

XTL-75g

120

160

750

1080*1170*1080

900

18000

Product Information

 Wholesale crucible for muffle furnace with good price - XTL    

Company Advantages

01

7000 square meters work shop

02

Automatic production line 

03

Longer working life

Certifications and Patents

Certificate
Certificate
Certificate

Frequently Asked Questions about Fire Clay Crucible

Q:

Why us?        

A:

* 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.

Q:

Are you a trading company or a manufacturer?        

A:

* We are a manufaturer. 

Q:

Can you provide the free samples?    

A:

* Yes,we can offer free sample if we have it in stock,but the courier fee is to be collected.

Q:

Do you accept customized production based our specification?    

A:

* 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.

Q:

What's the delivery time?      

A:

* 7 working days for standard products 30 days for customized products.


If you have another questions,please feel free to contact us.


Liling Xing Tai Long Special Ceramic Co.,Ltd

Contact: Fanny

Tel: +86 13975373343

     0086-0731-23253338

Email: admin@llxtl-china.com    

WhatsApp:0086-13975373343

Company address: Shentan Industrial Zone, Liling, Hunan, 412200




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The first thing we do is meeting with our clients and talk through their goals on a future project.
During this meeting, feel free to communicate your ideas and ask lots of questions.
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They are now widely exporting to 200 countries.

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