ASTM D5114-1990(2010) Standard Test Method for Laboratory Froth Flotation of Coal in a Mechanical Cell《机械浮选机中煤的实验室试验泡沫浮选的标准试验方法》.pdf
《ASTM D5114-1990(2010) Standard Test Method for Laboratory Froth Flotation of Coal in a Mechanical Cell《机械浮选机中煤的实验室试验泡沫浮选的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D5114-1990(2010) Standard Test Method for Laboratory Froth Flotation of Coal in a Mechanical Cell《机械浮选机中煤的实验室试验泡沫浮选的标准试验方法》.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D5114 90 (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 y
2、ear 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 che
3、mistry, 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
4、 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 resul
5、ts 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 met
6、hod 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 u
7、se 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 te
8、st 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-m
9、ent of grade/recovery curves are given inAppendix 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 repres
10、entative 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 m
11、ay 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 responsibility
12、of 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
13、in this test method.2. Referenced Documents2.1 ASTM Standards:2D121 Terminology of Coal and CokeD2013 Practice for Preparing Coal Samples for AnalysisD2015 Test Method for Gross Calorific Value of Coal andCoke by the Adiabatic Bomb Calorimeter31This test method is under the jurisdiction of ASTM Comm
14、ittee 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 ref
15、erenced 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.3Withdrawn. The last approved version of this historical standard is
16、referencedon www.astm.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.D2234/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
17、the Analysis Sample of Coaland Coke from CoalD3177 Test Methods for Total Sulfur in the AnalysisSample of Coal and CokeD4239 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 Desig
18、nating Coal Size3. Terminology3.1 DefinitionsFor definitions of terms used in this testmethod, see Terminology D121.3.2 Definitions of Terms Specific to This Standard:3.2.1 collectora reagent used in froth flotation to promotecontact and adhesion between particles and air bubbles.3.2.2 combustiblest
19、he value obtained by subtracting thedry weight (in percent) of the ash (as determined in TestMethod D3174) from 100 % representing the original weightof the analyzed sample.3.2.3 concentratethe froth product recovered in coal frothflotation.3.2.4 conditioning agentsall chemicals that enhance theperf
20、ormance of the collectors or frothers. Conditioning agentschange the characteristics of the surface of the minerals or theenvironment. There are many subgroups according to function:activators, depressants, emulsifiers, dispersants, flocculants,chelating reagents, froth depressants, pH modifiers, an
21、d soforth.3.2.5 flotation cellthe vessel or compartment in which theflotation test is performed.3.2.6 frotha collection of bubbles and particles on thesurface of a pulp in a froth flotation cell.3.2.7 froth flotationa process for cleaning fine coal inwhich hydrophobic particles, generally coal, atta
22、ch to airbubbles in a water medium and rise to the surface to form afroth. The hydrophilic particles, generally the ash-formingmatter, remain in the water phase.3.2.8 frothera reagent used in froth flotation to control thesize and stability of the air bubbles, principally by reducing thesurface tens
23、ion of water.3.2.9 grade/recoverythe relationship between quality andquantity of the clean coal product. The quality can be definedin terms of ash, sulfur, or Btu content. The quantity can bedesignated as yield or heating value recovery (Btu or combus-tibles).3.2.10 mechanical cella type of flotatio
24、n cell that em-ploys mechanical agitation of a pulp by means of an immersedimpeller (rotor) and stator stirring mechanism. Aeration to thecell can be from an external pressurized air source or self-induced air.3.2.11 natural pHthe measured pH of the pulp prior to theaddition of collector, frother, o
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