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1、INTERNATIONAL STANDARD IS0 8918 First edition 1996-I O-01 Fluorspar - Technical grades - Chemical composition and physical characteristics Spaths fluor - Qualit - ceramic grade; - metallurgical grade, comprising three types: - concentrate, - briquettes, - gravel. It specifies the methods to be used
2、for: a) sampling and sample preparation; b) determination of physical characteristics; c) chemical analysis. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the
3、editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of curre
4、ntly valid International Standards. 2.1 Sampling and sample preparation IS0 8868:1989, Fluorspar - Sampling and sample preparation. IS0 9497: 1993, Nuorspar - Experimental methods for evaluation of quality variation. IS0 9498:1993, Fluorspar - Experimental methods for checking the bias of sampling a
5、nd sample prepara- tion. IS0 9499:1995, Fluorspar - Method of determining the precision of sampling and sample preparation. 2.2 Physical characteristics IS0 4282:1992, Acid-grade and ceramic-grade fluor- spar - Determination of loss in mass at 105 “C. IS0 8875:1992, All grades of fluorspar - Determi
6、na- tion of moisture content of a lot. IS0 8876: 1989, Nuorspar - Determination of particle size distribution by sieving. 2.3 Chemical analysis IS0 3703: 1993, Acid-grade and ceramic-grade fluor- spar - Determination of f/o ta tion agents. IS0 4283:1993, All grades of fluorspar - Determina- tion of
7、carbonate content - Titrimetric method. IS0 4284: 1993, Acid-grade and ceramic-grade fluor- spar - Determination of sulfide content - lodometric method. IS0 5437:1992, Acid-grade and ceramic-grade fluor- spar - Determination of barium sulfate content - Gravimetric method. IS0 5438:1993, Acid-grade a
8、nd ceramic-grade fluor- spar - Determination of silica content - Reduced- molybdosilicate spectrometric method. IS0 5439:1978, Acid-grade fluorspar - Determination of available fluorine content - Potentiometric method after distillation. Copyright International Organization for Standardization Provi
9、ded by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 20:49:15 MDTNo reproduction or networking permitted without license from IHS -,-,- Q IS0 IS0 6676: 1993, Acid-grade and ceramic-grade fluor- spar - Determination of total phosphorus content -
10、Reduced-molybdophospha te spectrome tric method. IS0 9061: 1993, Acid-grade and ceramic-grade fluor- spar - Determination of iron content - 7, 70-Phenanthroline spectrometric method. IS0 9062: 1992, Acid-grade and ceramic-grade fluor- spar - Determination of manganese content - Per- iodate spectrome
11、tric method. IS0 9438: 1993, Metallurgical-grade fluorspar - De- termination of total phosphorus content - Reduced- molybdophosphate spectrometric method. IS0 9501 :1991, Metallurgical-grade fluorspar - De- termination of total sulfur content - lodometric method aftei combustion. IS0 9502: 1993, Met
12、allurgical-grade fluorspar - De- termination of silica con tent - Reduced-molybdo- silicate spectrometric method. I SO 9503 : 199 1, Metallurgical-grade fluorspar - De- termination of available fluorine content - Modified Willard-Winter method. I SO 9504: 1993, Metallurgical-grade fluorspar - De- te
13、rmination of antimony content - Solvent extraction atomic absorption spectrometric method. IS0 9505:1992, All grades of fluorspar - Determina- tion of arsenic content - Silver diethyidithiocarba- mate spectrometric method. IS0 9779: 1993, Metallurgical-grade fluorspar - De- termination of lead conte
14、nt - Solvent extraction atomic absorption spectrometric method. 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 acid-grade fluorspar: A grade of fluorspar, high in calcium fluoride content, suitable for the manufac- ture of hydrofluoric acid. 3.2 c
15、eramic-grade fluorspar: A grade of fluorspar, high in calcium fluoride content, suitable for use in the ceramic industry. 3.3 metallurgical-grade fluorspar: A grade of fluor- spar suitable for use as a flux in the metallurgical in- dustry. 4 Physical characteristics and chemical composition 4.1 The
16、specific limits to the physical characteristics shall be negotiated between supplier and purchaser. 4.2 The specific limits to calcium fluoride content or available fluorine content and to any other constitu- ents shall be negotiated between supplier and pur- chaser. 5 Test methods 5.1 Sampling and
17、sample preparation Sampling and sample preparation shall be carried out by the methods specified in 2.1. 5.2 Physical characteristics The determination of loss in mass at 105 “C, moisture content of a lot and the particle size distribution by sieving shall be done by the respective methods specified
18、 in 2.2. 5.3 Chemical analysis The chemical analysis shall be done by the methods specified in 2.3 for the constituents and grades as de- tailed in table 1. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001
19、Not for Resale, 04/27/2007 20:49:15 MDTNo reproduction or networking permitted without license from IHS -,-,- Q IS0 IS0 8918:1996(EI Table 1 - Methods of chemical analysis Method to be used for Constituent Expressed as percentage of Acid grade Ceramic grade . Metallurgical grades Concentrate I Briau
20、ettes I Gravel Flotation agents Flotation agents IS0 3703 ! IS0 3703 ! I - I I Carbonate CaCOs I SO 4283 IS0 4283 IS0 4283 IS0 4283 IS0 4283 Sulfide S IS0 4284 IS0 4284 Barium sulfate BaS04 ! IS0 5437 IS0 5437 I I I Silica SiO;! IS0 5438 IS0 5438 IS0 9502 IS0 9502 IS0 9502 Available fluorine CaF2 or
21、 F CaF? IS0 5439 IS0 5439 IS0 9503 IS0 9503 IS0 9503 Phosphorus PO;- IS0 6676 IS0 6676 IS0 9438 IS0 9438 IS0 9438 Iron Fe203 IS0 9061 IS0 9061 Manganese Sulfur Mn IS0 9062 IS0 9062 S IS0 9501 IS0 9501 IS0 9501 Antimonv I- Sb I- I- TISO 9504 7 IS0 95041 IS0 9504 1 Arsenic As IS0 9505 IS0 9505 IS0 950
22、5 IS0 9505 IS0 9505 Lead Pb IS0 9779 IS0 9779 IS0 9779 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 20:49:15 MDTNo reproduction or networking permitted without license from IH
23、S -,-,- ISO.B918:1996(E) (b IS0 ICS 73.080 Descriptors: minerals and ores, fluorspar, grades (quality), physical properties, chemical composition, tests, physical tests, chemical analysis. Price based on 3 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 20:49:15 MDTNo reproduction or networking permitted without license from IHS -,-,-