Filtration data sheet, testing

FILTRATION LEAF TEST DATA SHEET - VACUUM AND PRESSURE... 

Figure 11.8. A filtration leaf test data sheet (Dahlstrom and Silverblatt, 1977).

Vacuum and pressure laboratory filtration assemblies are shown in Figure 11.7. Mild agitation with air sometimes may be preferable to the mechanical stirrer shown, but it is important that any agglomerates of particles be kept merely in suspension and not broken up. The test record sheet of Figure 11.8 shows the kind of data that normally are of interest. Besides measurements of filtrate and cake amounts as functions of time and pressure, it is desirable... 

A matte with a higher copper content is more commonly encountered in practice because of the natural association of copper and nickel in most of the sulfide ores. A nickel-copper matte with 54% Ni, 12.5% Cu, 0.5% Co, 6.8% Fe, and 22.4% S was leached in a series of laboratory experiments followed by a continuous pilot plant campaign of over three months (P3). The matte was ground to 99.5% —100 mesh without giving problems in the filtration of the residue. The flow sheet followed in this test together with analytical data from the process streams, are shown in Fig. 2. The extractions for nickel, cobalt, and copper were 98.5, 95, and 98.5% respectively. 

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