ASTM_D_5114_-_90_2010.pdf

Designation:D511490(Reapproved 2010)Standard Test Method forLaboratory Froth Flotation of Coal in a Mechanical Cell1This standard is issued under the fixed designation D5114;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONFroth flotation of coal,the separation of ash-bearing minerals from combustibles via differences insurface chemistry,has been steadily increasing in use as a means to treat 600-m(No.30 U.S.A.Standard Sieve Series)or finer coal.The process is one in which many variables need to be monitoredand regulated.Because of this complexity,rigorous laboratory testing is difficult to standardize.This test method outlines the types of equipment and procedures to apply on a laboratory scale toisolate key process variables and minimize the variations associated with the design and execution ofa froth flotation test.The objective of the test method is to develop a means by which repeatablegrade/recovery results are ascertained from froth flotation testing of coal without imposingunnecessary limitations on the applicability of the test results in coal preparation practice.It is recognized that sample preparation,particularly comminution,has a significant impact on frothflotation response.This test method does not attempt to define sample preparation and size reductionpractices as part of a froth flotation testing program.This test method also does not completely cover specific procedures for the investigation of flotationkinetics.Such a test is specialized and is highly dependent upon the end use of the data.1.Scope1.1 This test method covers a laboratory procedure forconducting a single froth flotation test on fine coal(that is,nominal top size of 600 m(No.30 U.S.A.Standard SieveSeries)or finer)using a defined set of starting point conditionsfor the operating variables.1.2 This test method does not completely cover specificprocedures for the investigation of flotation kinetics.Such atest is specialized and highly dependent upon the objective ofthe data.1.3 Since optimum conditions for flotation are usually notfound at the specified starting points,suggestions for develop-ment of grade/recovery curves are given in Appendix X1.Sucha procedure is very case-specific and involves running a seriesof flotation tests in which some of the operating variables arechanged in order to optimize conditions for either yield orgrade.1.4 Laboratory flotation results need not be representative ofthe flotation response of coal in full-scale situations,but aconsistent baseline can be established against which full-scaleperformance can be compared.1.5 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.6 This standard does not purport to address the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.1.7 Material Safety Data Sheets(MSDS)for reagents usedare to be obtained from suppliers who are to be consultedbefore work with any chemicals used in this test method.2.Referenced Documents2.1 ASTM Standards:2D121 Terminology of Coal and CokeD2013 Practice for Preparing Coal Samples for Analysis1This test method is under the jurisdiction of ASTM Committee D05 on Coaland Coke and is the direct responsibility of Subcommittee D05.07 on PhysicalCharacteristics of Coal.Current edition approved Sept.1,2010.Published January 2011.Originallyapproved in 1990.Last previous edition approved in 2004 as D5114 90(2004).DOI:10.1520/D5114-90R10.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 D2015 Test Method for Gross Calorific Value of Coal andCoke by the Adiabatic Bomb Calorimeter(Withdrawn2000)3D2234/D2234M Practice for Collection of a Gross Sampleof CoalD3173 Test Method for Moisture in the Analysis Sample ofCoal and CokeD3174 Test Method for Ash in the Analysis Sample of Coaland Coke from CoalD3177 Test Methods for Total Sulfur in theAnalysis Sampleof Coal and Coke(Withdrawn 2012)3D4239 Test Method for Sulfur in the Analysis Sample ofCoal and Coke Using High-Temperature Tube FurnaceCombustionD4749 Test Method for Performing the Sieve Analysis ofCoal and Designating Coal Size3.Termin