Sheet 513 / 1

Page 2

Fire Assay Crucibles

22-Nov-11

C513_1_AssayCruc.doc

High Performance Fusion Crucibles : Universal Range

30P

40P

50M

55M

65M

Gold Analysis in Ores / Concentrates / Scraps / Residues

 

Photo 1 - Eroded furnace hearth

Single Loading / Pouring
–   manual   –

 Work up to 1250 ΊC

 Suitable for single tongs handling / mechanical load & pour automated systems

 Adequate for multiple reuse processes

 High resistance to flux / slags erosion & thermal shock

 Universal  Range  reduces
shipping / storage costs

Multi Loading / Pouring
–   manual or automatic   –

Photo 2 – Multi-Load Tool

 

High performance, multi-use crucibles serve for determination of Precious Metals (PM): – Au, Ag, and Platinum Group Metals (PGM): Pt, Pd, Ir, Rh, Ru, Os – by Fire Assay / Cupellation method (aka "Docimasy").

Crucibles are used to "flux-melt" under high temp. reducing conditions following kinds of samples:
 ● Exploration ores from drill cores / trenching / grabbing by gold mines and Geological Labs.
 Mineral concentrates and electrolytic slimes processed   by copper smelters.
  Scraps & Residues (ashes) from sweeps / filings / lemel / catalysts / recycled by PM refineries.

 Universal Range : For all Precious Metals Assay Laboratories

Given the diversity of furnaces/ handling systems existing in laboratories worldwide, Universal Range was developed to suit most Assayers’ jobs. Capacities: from 1 to 2-Ό assay-tons: (A. T.) (+).

Designed to provide erosion and cracking resistance under harsh working conditions, Universal Range pots yield longer life, faster fusion, constant melting speed and resistance to thermal shock.

 Composition  &  Manufacture

A carefully blended mix of fireclays and additives ensures a product of dense body to minimize  absorption losses while retaining the ability to resist flux (litharge) penetration, erosion and cracking under all furnace working conditions, flux compositions and lead (Pb) or nickel sulfide (NiS) Precious Metal collection methods.

 Capacities   –  Dimensions  –  Weights  –  Packing

Universal Range

Ref. (‡)►

30P

40P

50M

55M

65M

Capacities

 

 

 

 

 

 

Nominal Ore Sample     (‡)

g

30

40

50

55

65

Nominal Ore Sample     (+)

A.T.

1

1-½

1-Ύ

2

2-Ό

Real Volume - Brimful

mL

275

375

530

390

550

Dimensions (†)

 

 

 

 

 

 

Ψ - Upper External / Internal

mm

88 / 74

90 / 80

103 / 91

90 / 80

106 / 91

Ψ - Down External

mm

55

59

57

57

57

H - External

mm

107

135

143

158

164

Weights  (†)

g / u

480

500

570

620

720

Packing

 

 

 

 

 

 

Carton  38 x   38 x 31 cm

pc / box

64

48

36

32

27

Crate  116 x 116 x 96 cm

pc / crate

2040

1680

1440

1380

1200

Price           

€ / u

*

*

*

*

*

(+) A.T.: Assay Ton: Standard ore sample quantity: 29.166 g (short A.T. - USA) or 32.666 g (long A.T. - UK)
(†) Dimensions and Weight are nominal. May change with differing drying / firing shrinkage rates

(‡): "
Ref." indicates Nominal Ore Sample Capacity (g); not total "charge" capacity (Ore + Flux + Inquart)

 

Universal Range Profile Section

Wall thickness provides good resistance to flux attack
Wide base confers stability over eroded furnace hearths (ph. 1)
Outer Taper form adapts to single tongs / multi-load tools (ph. 2)
● Sturdy conical shape allows pot 'nesting' saving space in crates
Nesting shrinks crate volume & reduces storage needs
Compact packing cuts transport cost to remote locations

 

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