Sheet 513 / 3

2 ◄ Page

Parting & Annealing

22-Nov-11

C513_3_Part_Anneal.doc

FIRE ASSAY OF PRECIOUS METALS

1. Quartz  Glassware - for  efficient  Assay  processing  - Allowed by ISO 11426:1997 (§ 7.1.4 )

♦ Withstands concentrated / boiling nitric acid attack.

♦ Resists temperatures up to 1000ΊC and thermal shock.

Cornets travel untouched through parting / rinsing / annealing.

♦ Extends inherent parallel processing capabilities of Fire Assay.

Full scalability to mass analysis production stage.

♦ Save time - reduce manipulation hazards.

♦ Assays keep original array – no misplace errors.

♦ Labour, Reagents (HNO3 - H2O), Energy costs greatly reduced.

1.1 QuarTz  Parting  &  Annealing  baskets

Basket QB-25 (5 x 5 array)

Quartz Baskets packs 20, 25 or 30 cornet batch for simultaneous treatment through: a) 2 nitric acid attacks + 2 water rinses: once @ 33% and once @ 49% (m / m) , b) drying and c) 750ΊC annealing.

Consists of 25 type 'D3' crucibles framed together plus a handle.

Basket

Dimensions

Capacity

Weight

Price

Ref.

mm

Samples

kg

€

QB-20

100 x   80 x 50

20 (5 x 4)

 

*

QB-25

100 x 100 x 50

25 (5 x 5)

 

*

QB-30

120 x 100 x 50

30 (6 x 5)

 

1100,00

1. 2. QuarTz   parting  &  Annealing  trays

 

< Tray QT-20 (5 x 4 array)

 

Thimble 'E' inserted in hole

Quartz Tray performs same functions as basket, but permits easy change of thimble spare parts in case of accidental breakage.

Capacities: 20 or 25 removable type ‘E’ (flanged) thimbles. Plate: 4 mm thick. With 4 legs (height 25 mm) and 2 handles (Ψ 6 mm).

Tray

Dimensions

Capacity

Weight

Price

Ref.

mm

Probes

kg

€

QT-20

170 x 142 x 48

20 (5 x 4)

 

*

QT-25

170 x 170 x 48

25 (5 x 5)

 

 

1. 3. QuarTz  Parting  &  Annealing  Crucibles  -  Allowed by ISO 11426:1997 (§ 7.1.4  "quartz thimbles")

   

D: straight          E: flanged

F: Bottom Rim Slot 1,5 mm wide

TL: Lateral Hole Ψ 2.5 mm

TF: Bottom Hole Ψ 2.5 mm

Type E (flanged) may be placed on quartz tray QT20 / QT25 for speedier handling. See § 1.2 above.

Four perforation variants to suit different gold cornet sizes.

Thi

mble

Ψ

 

Hght

Slit

Ho

les

Price

Ref.

Type

Out

In

Out

‘F’

‘TL’

‘TF’

€ /

 

 

mm

mm

mm

#

#

#

piece

D1

straight

17

14

20

–

–

–

-

D2

"

17

14

20

4

–

–

-

D3

"

17

14

20

–

–

3

-

D4

"

17

14

20

–

9

3

-

E1

flanged

17 / 21

14

20

–

–

–

-

E2

"

17 / 21

14

20

4

–

–

-

E3

"

17 / 21

14

20

–

–

3

*

E4

"

17 / 21

14

20

–

9

3

-

2. Borosilicate  GLASS  PARTING  FLASKs

Parting Flask made with low thermal expansion borosilicate glass withstands both nitric acid attack and thermal shock.

Tall narrow neck designed to fit inside gold annealing cups.

Flask

Dimensions

Weight

Price

Ref.

mm

kg

€

"2"

230 x Ψ 48 x Ψ 18

 

*

 

 

 

 

3. Fireclay  cups  for  gold  cornet  annealing

 Cup # 0         Cup # 1

Fireclay Annealing Cups, possess a smooth unglazed surface.

Tronco-conical form designed for gold bead annealing and for ignition of precipitates such a barium sulphate and copper sulphide.

Cup

Ψ sup.

Ψ inf.

H

Cap.

Wght

Price

Ref

mm

mm

mm

cm3

g

€ / u.

0

29 - 25

19

32

  8

11

*

1

35

22

35

14

19

*

2

41

 

44

 

 

-

Cupellation :CupelsBlocksInstructionsCertificatesTools Consumables  –  Fire Assay: Crucibles AccessoriesParting / Annealing

Terms: Cupellation  Fire Assay  Reagents  Other Methods  Metals  Context  –  Index:Programme  –  Brochure: MABOR