technical suport

As we strive together with our customers to achieve defect free "as cast" castings for some of the world's most demanding end-users, we have developed a philosophy of "as cast, not after cast." Working alongside our customers through product innovation, technical backup and consultancy services, coupled with over 100 years of combined in-house practical foundry experience, we strive to supply the best product and technical solution in the market.

Rand York not only offers its customers high quality, competitive products but also a high level of technical support. We have helped many customers with the selection of materials, methods and calculations to aid the production of large steel castings and rolls. We have an in depth experience of foundry practice and would be pleased to offer advice or opinion to any of our customers. In most instances, we do this on site at the customer's facility.

OUR PHILOSOPHY CAN BEST BE DESCRIBED AS:

"AS CAST, NOT AFTER CAST"

Practical foundry experience

Top class consultancy service

defect free casting

Use of Chromite in Cores and Moulds:

We have compiled a guide to the use of Chromite in the foundry industry for cores and moulds. It includes information on:

1.0 The Alkaline Phenolic Process (Ester Cured)
1.1 Rand York Chromite: Resin and Hardener Percentages 


2.0 The Cold Box Process (Phenolic Urethane, Amine catalysed and Self Set 
2.1 Rand York Chromite: Cold Box; Resin and Amine Percentages
2.2 Rand York Chromite ADV (acid demand value) and pH


Download the document here:

  • Use of Chromite in the Foundry Industry for Cores and Moulds [pdf 647KB] 

Chromite Ore Hazard Classification

Main constituents

Principally a solid solution of oxides of aluminium, chromium, iron(divalent and trivalent) and magnesium in a spinel structure with general formula FeIIMg(Al Cr FeIII)2O4. Some sources of chromite ore also contain gibbsite(AlCrFe)2O3. 

None of the individual constituent oxides or end-members of the system(FeCr2O4, FeFe2O4(Fe3O4), FeAl2O4, MgAl2O4, MgCr2O4,MgFe2O4) was classified as hazardous via Annex I of the EU Dangerous Substances Directive 67/548. 

The information shown in the registered substances section of the ECHA website indicates that Al2O3,Cr2O3, FeO, Fe2O3, Fe3O4, FeCr2O4 and MgAl2O4 are not classified as hazardous but some notification entries in the CLP inventory on the same website are not consistent with dossier classifications. There is no registered substance entry for magnesium oxide but the entry for the hydroxide indicates no classification. There are no registered substance entries for the remaining system end-members listed above. 

It is reasonable to conclude on the basis of these data that chromite ore should not be classified under GHS on the basis of its main constituents. 

It is important to note the each entry on the registered substances list contains the following warning:"Use of this information subject to copyright-may require permission of the owner of the information". 

01

IMPURITIES

02

COBALT OXIDE

03

Nickel Oxide

GET IN TOUCH:

Tel: +27 11 463 9000

Email: randyork@mweb.co.za

P O Box 650755

Benmore

2010

South Africa

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