Reproducible measurements

Photo-optical particle analysis in mineral processing

1 HAVER CPA 2-1

2 Die Zeilenkamera erkennt alle Partikel im freien Fall und verarbeitet die Daten in Echtzeit • The line camera identifies all particles in freefall and processes the data in real time

3 Erklärung Siebweitentoleranz: Die maximal zulässige Toleranz in einem Gewebe ist laut ISO 3310 die +X Toleranz. Hiernach dürfen einzelne Maschen (z.B. bei einem 1 mm Gewebe) mit bis zu 14 % größeren Maschenweiten als nominell vorkommen. Nach dem oben gezeigten Beispiel können in einem normgerechten 1,0 mm Analysensieb Maschen enthalten sein, die bis zu 1,14 mm groß sind. Maschen dieser Maschenweite weisen eine Diagonale von 1,612 mm auf, d.h. es kann vorkommen, dass plattige Partikel mit einer maximalen Breite (min. Feret oder orthogonalem Durchmesser) von bis zu 1,612 mm auftreten und anhand der Analysensiebung als kleiner 1,0 mm eingestuft werden • Explanation of the mesh width tolerance: The maximum permissible tolerance in a cloth is according to ISO 3310 the +X tolerance. Accordingly individual apertures (e.g. for a 1 mm cloth) can be present with up to 14 % larger mesh sizes than the nominal size. According to the above example, a standard-compliant 1.0 mm analysis sieve can contain apertures that are up to 1.14 mm. Apertures of this size have a diagonal measuring 1.612 mm, i.e. flattish particles with a maximum width (min. Feret or orthogonal diameter) up to 1.612 mm can pass the sieve and can be classed as smaller than 1.0 mm in sieve analysis

4 Gegenüberstellung von 4 Messergebnissen • Comparison of four measurement results

5 Die Partikelliste zeigt alle Partikel mit maßstäblichem Bild und ermöglicht u.a. empirische, parameterunabhängige Analysen. Durch die „copy and paste“-Funktion ist eine weitere Verwertung der Messparameter in z.B. Excel möglich. (Ausschnitt Partikelliste: von oben 1-Cent Münze, Büroklammer, Stecknadel) • The particle list shows all particles with scaled image and enables, for example, empirical, parameter-independent analyses. With the “copy and paste” function, further use of the measurement parameters is possible in, for instance, Excel (extract from the particle list: from the top 1-cent coin, paper clip, pin)

6 HAVER CPA 2 CONVEYOR

7 HAVER CPA 5 CONVEYOR: Individuell angepasste Bauform für Inline- und Online-Anwendungen, z.B. in der Koksindustrie • HAVER CPA 5 CONVEYOR: Individually adapted design for inline and online applications, e.g. in the coke industry

Auf dem HAVER CPA 4 CONVEYOR werden z.B: Holzhackschnitzel vor der Analyse vereinzelt und ausgerichtet • On the HAVER CPA 4 CONVEYOR, wood chips, for instance, are separated and aligned prior to analysis

Summary: HAVER & BOECKER supplies patented technology for photo-optical particle analysis that is used to reproducibly measure bulk solids, each particle being individually analysed in real-time. The HAVER CPA systems enable not only classical particle size distribution in overview, but also the analysis of every scanned particle in respect of a variety of size and shape definitions. Developed at the beginning of the 1990s, the process has been steadily further developed with innovative modification of the hardware and software for optimum analysis of bulk solids. These include dry and free-falling materials in various industries: from pharmaceuticals and food through coal and non-metallic minerals to plastics, animal feed and the fertilizer industry.

1 Sample preparation

Precondition for the increasingly important process monitoring is accurate sample preparation. As moved and transported bulk solids are subject to separation, sampling must be performed carefully over the entire stream of material. For the wide range of industries and processes, for example hammer samplers, spoon samplers or sample extractors are used. To reduce the analysis time, in many cases sample division is expedient. Sampling must be performed representatively. For this purpose splitters and rotating sample reducers, for example HAVER sample splitters and HAVER RPT...