FIRE ASSAY

FIRE ASSAY CLAY CRUCIBLE

Product Description: Fire Assay Clay Crucible Model No.: 30G, 40G, 50G, 55G, 65G, 75G Multi-use Times: More Than 5 Times Package Type: Crates or Cartons with Pallet Order Lead Time: 3 Days Delivery Port: Qingdao Port or Shenzhen Port Customization Availability: Yes Please review below detail information to know more about Decent fire assay clay crucibles.

Product Details

[ BRIEF INTRODUCTION ]

Fire assay clay crucible is made of fire clay and proprietary additives and has more than 3000 years history in both historical texts and gold refining industry. A crucible is, in simple term, a ceramic cup. So it is also called “pot”.

A modern fire assay clay pot is not so far removed from those of the past with the exception of the additional science and technology behind its compositions. Modern fire assay crucibles are designed and manufactured for mineral and geochemical laboratories’ usage rather than refining and so are required to be exacting in their specifications and strong enough to withstand huge changes in temperature through multiple uses.

Different from offering one shot disposable crucible, we produce and provide fire assay clay crucibles which have well-deserved reputation for multiple firings uses. Our standard range of fire assay clay crucibles from 30G to 75G can usually be proceeded 5-times-firing and sometimes can be even repeatedly used in more than 9 times with some formula of flux. This feature provides our customers important benefits of reducing cost per firing and increasing profitability. And we can also design and supply to our customer's individual requirements and specifications in dimensions, shape and so on.

[ PROFESSIONAL PRODUCTION ]

We have more than 20 years experiences in the industrial ceramic and refractory industry, including fire assay clay crucible, cupel and so on. Our current factory plant of industrial ceramic and refractory products is around 30,000 square meters (around 8 acres) which includes one office building, three production workshops and one warehouse. Our current annual production capacity of crucible is 6.5 million pieces and can be expanded to more than 9 million if necessary.

We manufacture fire assay multi-firing clay crucibles with the latest automated technology and so we can guarantee sizing consistency which is critical for multi-pour systems and automated lines in fire assay laboratories. Meanwhile, carefully selected raw materials and more reasonable formulation with low caustic soda, low iron content and high silicon content enable our fire assay clay crucibles to have high temperature resistance up to 1500°C. The crucibleingredientsare as below sheet.

Ingredient

Percentage (%)

Silica (SiO2)

60-65

Magnesium Oxide

<0.2

Calcium Oxide

<0.6

Aluminum Oxide

30-34

Ferric Oxide

<2

Titanium Oxide

<2

Sodium Oxide

<0.1

Potassium Oxide

<0.5


What's more, we are the only manufacturer in China which has complete in-house capability for all production processes of fire assay clay pots. This ensures best control in quality, cost and order lead time from the beginning of production. So we keep supplying multiple firing fire assay clay pots to many well-known fire assay laboratories in all over the world. Below are some photos of production procedure and process.


           Ball Milling                Raw Materials Compression Filtration


Vacuum Pugging Molding


                                                                              Chain Drying                                 Firing in Kiln                                                        Firing in Kiln

Customization is also available for any requirement to shape, size and so on. We can even mold logo, model no. or other signs onto the bottom of crucible if it is required by customer.

[ QUALITY CONTROL ]

We have very strict quality control and inspection procedure and standard to every batch of crucibles. Following process is applied to all batches of pots.

Visual Check & Inspection: Fire assay clay pots are randomly selected from crates package according to sampling rate. All randomly selected pots are weighed to check weight variability. Then the durability of pots is tested by striking the pots increasingly harder. After these tests, the randomly selected fire assay clay pots are cut in half to provide a cross section, which enables QC to check the consistency of grain size and external profile in height and width.

Drawing & Cross Section Photo of 30G Crucible

Drawing & Cross Section Photo of 40G Crucible

Drawing & Cross Section Photo of 50G Crucible

Drawing & Cross Section Photo of 55G Crucible

Drawing & Cross Section Photo of 65G Crucible

Use Test: Randomly selecting some pots again according to sampling rate and then adding flux without silica in pots to ensure the pots are tested aggressively. Then placing these crucibles into fusion furnace which has been set at 1050°C for 1 hour to replicate normal fusion conditions. This process is repeated in 5 times. The final test result can be recorded as Pass if no noticeable difference in pouring is observed among the pots and no lead splashing on the moulds occurred and no any structural damage, i.e. cracks or holes in the walls, to the crucibles.

Replicate Normal Fusion Conditions for Use Test Crucible Status after 5 Times Firing

Above photo is the status of our fire assay clay crucibles after 5 fires which has no any structural damage (Borax constituent of flux attacks material of crucible and can cause structural defects) and no any showed signs of being compromised i.e. cracks or holes in the crucible walls. From the photo we can notice that the crucible walls are less eroded and still appear smooth appearance. All these approve the premium quality and multiple firings feature of Decent fire assay clay crucible.

Boil Over Status after 5 Times Firing


Above photo shows the boil over status of our fire assay clay crucibles after 5 fires, which show less evidence of boil over and also approves the premium quality and excellent multi-trip feature of Decent fire assay clay crucibles.

[ PACKAGE ]

After all tests have been done and final result is Pass, the related batches of crucibles will be put into wooden crates or cartons with pallet according to customers’ requirements. Both carton and crate can be printed with customer’s Logo or shipping marks according to customers’ requirements. Then QA stamp and production serial no. will be marked onto the packages before container loading or delivering to port.


[ DELIVERY TIME ]

We keep stock for almost all models of crucible in the warehouses at both our production facility and Qingdao port for various consignment deliveries requirements to any location around the world. The shortest order lead time and delivery time can be 3 days after receiving order confirmation, which ensures on time and in full delivery for any urgent order.

[ CONTAINER LOADING ]

We ship hundreds of containers of crucibles to all over the world. So we have rich experience for container loading to meet various requirements to FCL shipment such as followings:

                

      



[ TECHNICAL PARAMETERS ]

Besides the models and dimensions of fire assay clay pots listed below, we are also able to produce any model and size of fire assay clay pots according to customer's requirements.

Model No.

AKA (gram)

Volume (ml)

Top OD (mm)

Height (mm)

Base OD (mm)

Pcs / Crate

Pcs / Container

DC30

30G

245

85

107

55

2600

52,000

DC40

40G

350

88

130

55

2000

40,000

DC50

50G

430

105

150

57

1530

30,060

AP

A Pot

455

105

132

57

1290

25,800

DC55

55G

470

88

155

57

1500

30,000

DC65

65G

500

105

165

57

1425

28,500

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