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BS ISO 12743:2021 – TC

BS ISO 12743:2021 – TC

$280.87

Tracked Changes. Copper, lead, zinc and nickel concentrates. sampling procedures for determination of metal and moisture content

Published By Publication Date Number of Pages
BSI 2021 184
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PDF Catalog

PDF Pages PDF Title
100 National foreword
106 Foreword
107 1 Scope
2 Normative references
3 Terms and definitions
110 4 Sampling theory
4.1 General
4.2 Total variance
112 4.3 Sampling-stage method of estimating sampling and total variance
114 4.4 Simplified method of estimating sampling and total variance
115 4.5 Interleaved sample method of measuring total variance
118 5 Establishing a sampling scheme
123 6 Mass of increment
6.1 General
6.2 Mass of increment for falling-stream samplers
6.3 Mass of increment for cross-belt samplers
6.4 Mass of increment for manual sampling from stationary lots
6.4.1 Primary increments
124 6.4.2 Mass of secondary and subsequent increments
6.5 Mass of increment for stopped-belt reference sampling
7 Methods of sampling from concentrate streams
7.1 General
7.2 Mass-basis systematic sampling
7.2.1 General
7.2.2 Sampling interval
125 7.2.3 Sample cutter
7.2.4 Taking of primary increments
7.2.5 Constitution of subsamples and lot samples
126 7.2.6 Types of division
7.2.7 Division of increments
7.2.8 Division of subsamples
7.2.9 Division of lot samples
127 7.3 Time-basis systematic sampling
7.3.1 General
7.3.2 Sampling interval
7.3.3 Sample cutter
7.3.4 Taking of primary increments
128 7.3.5 Constitution of subsamples and lot samples
7.3.6 Types of division
7.3.7 Division of increments and subsamples
7.3.8 Division of lot samples
7.4 Stratified random sampling
7.4.1 Fixed mass intervals
7.4.2 Fixed time intervals
129 8 Mechanical sampling of concentrate streams
8.1 General
8.2 Design of the sampling system
8.2.1 Safety of operators
8.2.2 Location of sample cutters
8.2.3 Provision for interleaved sampling
8.2.4 Provision for stratified random sampling
130 8.2.5 Checking precision and bias
8.2.6 Avoiding bias
8.2.7 Minimizing bias
8.2.8 Configuration of the sampling system
8.3 Sample cutters
8.3.1 General
131 8.3.2 Design criteria
132 8.3.3 Cutter speed
8.4 Mass of increments
133 8.5 Number of increments
8.6 Sampling interval
8.7 Routine checking
134 9 Manual sampling of concentrate streams
9.1 General
9.2 Choosing the sampling location
9.3 Sampling implements
9.4 Mass of increments
9.5 Number of increments
9.6 Sampling interval
135 9.7 Sampling procedures
9.7.1 General
9.7.2 Full stream cut from a falling stream
9.7.3 Partial stream cuts from a falling stream
136 9.7.4 Sampling from moving conveyor belts
10 Stopped-belt reference sampling
137 11 Sampling from grabs
11.1 General
11.2 Mass of primary increments
11.3 Number of primary increments
11.4 Method of sampling
11.5 Constitution of subsamples and lot samples
138 12 Sampling from trucks, railway wagons and sampling hoppers
12.1 General
12.2 Mass of primary increments
12.3 Number of primary increments
12.4 Method of sampling
12.5 Constitution of subsamples and lot samples
141 13 Sampling of concentrate in bags or drums
13.1 General
13.2 Mass of primary increments
13.3 Number of primary increments
142 13.4 Method of sampling
13.4.1 General
13.4.2 Sampling during filling or emptying
13.4.3 Spear sampling
13.5 Constitution of subsamples and lot samples
143 14 Sampling of stockpiles
15 Methods of comminution, mixing and division
15.1 General
15.2 Comminution
15.2.1 General
15.2.2 Mills
144 15.3 Mixing
15.3.1 General
15.3.2 Methods of mixing
145 15.4 Division
15.4.1 Chemical analysis samples
146 15.4.2 Moisture samples
15.4.3 Number of increments for division
15.4.4 Minimum mass of divided sample
147 15.4.5 Rotary sample division
148 15.4.6 Cutter-type division
15.4.7 Manual increment division
15.4.8 Spear division
149 15.4.9 Fractional shovelling
150 15.4.10 Ribbon division
152 15.4.11 Riffle division
154 16 Sample requirements
16.1 Moisture samples
16.1.1 Mass of test portion
16.1.2 Processing of samples
16.2 Chemical analysis samples
155 16.3 Physical test samples
17 Packing and marking of samples
156 Annex A (normative) Sampling stage method of estimating sampling and total variance
163 Annex B (informative) Estimation of total variance — Barge unloading using a grab
167 Annex C (informative) Mechanical sample cutters
172 Annex D (informative) Checklist for mechanical sampling systems
176 Annex E (normative) Manual sampling devices
178 Annex F (informative) Apparatus for manual sampling of concentrates from stopped belts
179 Annex G (informative) Sampling of stockpiles
181 Annex H (normative) Increment division scoops for conducting manual increment division
182 Bibliography

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BS ISO 12743:2021 - TC
$280.87