Sheet 513 / 2

1 ◄  Page  ► 3

Fire Assay Tools

22-Nov-11

C513_2_AssayTools.doc

1. LONG TONGS FOR HANDLING FIRE ASSAY CRUCIBLES AND CUPELS

Cupel Tongs CT 3: 10 X 6 mm

                            For Mabor cupels # 6 till # 12    35 - 60 mm)

Cupel tongs (CT-3) are adequate for moving bigger range of cupels used in ore analysis. ( ►Cupels)

Crucible Tongs (CrT) handle fire assay crucibles. Open ring (210º) is adequate for horizontal movements in and out of the furnace. Rod holds crucible while pouring into moulds.

Crucible Tongs CrT 1

                      For crucibles 30P, 40P, 55M (Ø ≈ 90 mm)

Crucible Tongs CrT 2

                       For crucibles 50M, 65M (Ø ≈ 90  105 mm)

Tong

L 

Wgt

Fits: Crucibles

Cupels

Price

ref

cm

kg

Ref

Ø (mm)

€ / u

CT 3

90

0,86

# 6 till # 12

35 – 60

*

CrT 1

140

0,5

30P – 40P – 55M

88 – 90

*

CrT 2

140

0,5

50M – 65M

105

*

 

2. LEAD BUTON POURING MOULDS -   Up to 12 charges, conic holes - Cast Iron.

 


Mould BM6a (6x1)

 

 

Mould BM12 (4x3)

Ref

L   x   W   x   H

 

C o n e

 

Wgt

Price

 

mm

#

mm

cm3

kg

€ / u

BM 2

160 x 75 x 55

2x1

Ø 51 x 32

21

3,6

*

BM 6

385 x 60 x 45

6x1

Ø 51 x 28

19

5,5

*

BM6a

676 x 105 / 40 x 60

6x1

Ø 75 x 38

55

14

*

BM12

355 x 254 x 46

4x3

Ø 75 x 38

55

6,1

*

     BM2 & BM6 incorporate cast iron handle protruding 170 mm

 

3. PROTECTIVE COATING and RELEASE AGENT for ASSAY steel moulds

ProtectT water-based coating prevents melt (Pb button + flux) from sticking to mould. Applied with a brush & allowed to dry before use.

Thereafter moulds are coated only when solidified lead buttons start to stick to inner walls.

Coating

20 L

2,5 L

Release Agent

€ / drum

€ /pail

►'Protect'

*

*

 

4. Maborite Non-Sticking Powder    Furnascote Flux Resisting Coating & Patching Mortar

Maborite Non Sticking Powder

Non-Vit Zircon
Refractory Coating

● Prevents Cupels from sticking to Trays & Hearths
● Stops Litharge / Flux attack: increase refractory life
● Noxious PbO vapour emissions are notably reduced

● Same MgO composition as Mabor cupels

Maborite® Powder

5 kg

25 kg

88% Magnesia (MgO)

€ / pail

€ / sack

Refractory parting / bedding

18,00

   47,50

● Protects furnace surfaces exposed to hardest conditions, as Litharge / Flux attack

● Use: 4,5 kg/m2 & 1,5 mm layer (min 2 layers)

● Temp. 1910ºC (Seger cone)   Furnascote

Furnascote® Coating

5 kg

25 kg

63% Zirconia (ZrO2)

€ / pail

€ / drum

Non-Vit - Patching / Coating

42,90

129,00

 

5. LITHARGEYellow lead oxide crystalline powder ( 99,8% PbO) - Ref Batch L-1109026  - Cert.

Impurities

Fe

Cu

Bi

Ag

Zn

Sb

% (max)

< 0.0015

< 0.0010

< 0.0250

< 0.0020

< 0.0010

< 0.0010

 

 

 

Apparent
Density

Molecular weight

Granulo

<40 μ

metry
  <10 μ

ADR
 Classif

ONU
Danger

CAS

25 kg
€ / drum

9.5

1.9 – 2.3

223.21

100%

60%

6.1, III

60-2291

1371-36-8

*

Functions of Litharge

How Litharge (MP. 888ºC, BP. 1477ºC, Dens. 9.35) Works inside the Crucible

Collector: Part of PbO is reduced.
Pb droplets rain down through the sample collecting all metals

Fluxing agent

Desulphuriser

Solvent for metallic oxides

Increases Fluidity in combination with an acid ore constituent.

● Prevents formation of 'Matte' (by oxidation of S) and of 'Speiss' (by oxidation of Sb & As).

Prevents reduction into lead button of those metals below Pb in the redox potential series.

● Combined with acid reagents PbO forms an efficient Solvent for acid and basic Oxide Compounds that are too viscous at furnace temperature.

 

 

 

Cupellation :CupelsBlocksInstructionsCertificatesTools Consumables   Fire Assay: Crucibles AccessoriesParting / Annealing

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