Beneficial Uses of Spent Foundry Sands | Sustainable ,
The metal casting industry generates spent foundry sands Foundries purchase new, sand to make casting molds, and the sand is reused numerous times within the foundry This reuse eventually renders the sand unsuitable for use in casting molds, and a portion of the sand ,
Reclamation of used green sand in small scale foundries ,
The cost of reclaimed sand is fixed after surveying 120 small and medium scale foundries and according to the survey the current cost of reclaimed sand is acceptable to majority of stakeholders Further improvements can be done such as, removing fines (
This sand (so-called ‘unit’ sand) is then used for all cores, ie those used in both greensand and chemically bonded sand moulds Reclaimed sand has a lower thermal expansion than new sand and will have a grain shape and particle size distribution that is as good as or better than new sand
A typical reclaimed sand magnetic value is about 0/2% The maximum value should generally run about 25%, Good cores, moulds and castings have been achieved with a magnetic level of >10% Microscopic analysis: A great deal of information can be obtained by frequent microscopic examination of the sands in use – coated, raw, and reclaimed sand .
Moulding Sand Reclamation-A Brief Review MVenkata Ramana Department of Mechanical Engineering Vignan Institute of Technology & Science,Deshmukhi,TELANGANA,INDIA Abstract- The main concern of every foundry unit is processing required quantity of sand to impose the required
Modern Sand Reclamation Technologies for Economy ,
TRANSACTIONS OF 61st INDIAN FOUNDRY CONGRESS 2013 Modern Sand Reclamation Technologies for Economy, Environment Friendliness and Energy Efficiency ABSTRACT Unlike green sand, chemically-bonded sand cannot be used again and again without reclamation because in
Sand Reclamation is the Core of a Strategy for Reclaiming ,
For foundries that currently ship their spent sand to approved landfill sites, the costs of disposal and new sand purchases can easily justify investing in an in-house sand-reclamation system In most cases if a foundry generates two tons/hour of disposal sand, then sand reclamation should be investigated
Influence of a Reclaimed Sand Addition to Moulding Sand ,
Moulding sand, after knocking out the cast, is partially reclaimed, and the remaining part, known as waste foundry sand is used or stored outside the foundry In this case, the environment hazardous organic compounds and metals can be leached from the moulding sand, thus causing pollution of ,
Sep 20, 2016· The sand temperature can be influenced by variations in the way foundries dry and cool their reclaimed green sand, or store and distribute their no bake sand As foundry sand is an integral part of the casting process, using sand that is too hot or too cold leads to reduced casting quality, with lasting negative affects along the entire .
The flowsheet shown in this study is particularly adapted to the requirements of the average foundry to reclaim foundry sand for re-use Any foundry whose new sand delivered costs is too high should seriously consider reclamation with the flowsheet as illustrated This reclaimed sand is usually equal to, or better than the original sand