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Scavenging circuit

Scavenging Circuits. These are combinations of gravity separation and flotation to recover die loss via slimes occurring in the classical procedure. A simplified flow sheet of the Cantung Mine beneficiation plant (Canada Tungsten Mining Corporation) is given in Fig. 5.3. [Pg.181]

The flotation operation was a combined rougher-scavenger circuit. The first concentrate (rougher) contained about 80% of the floatable solids. The second concentrate (scavenger) was collected imtil the froth was essentially barren. [Pg.731]

Vanadium raw materials are processed to produce vanadium chemicals, eg, the pentoxide and ammonium metavanadate (AMV) primary compounds, by salt roasting or acid leaching. Interlocking circuits, in which unfinished or scavenged material from one process is diverted to the other, are sometimes used. Such interlocking to enhance vanadium recovery and product grade became more feasible in the late 1950s with the advent of solvent extraction. [Pg.392]

Normally, a small reserve of oxygen scavenger is maintained in the BW to preserve satisfactory reducing conditions within the steam-water circuits. [Pg.168]

As shown on Figure 9.1 when the circuit is opened (I = 0) the catalyst potential starts increasing but the reaction rate stays constant. This is different from the behaviour observed with O2 conducting solid electrolytes and is due to the fact that the spillover oxygen anions can react with the fuel (e.g. C2H4, CO), albeit at a slow rate, whereas Na(Pt) can be scavenged from the surface only by electrochemical means.1 Thus, as shown on Fig. 9.1, when the potentiostat is used to impose the initial catalyst potential, U r =-430 mV, then the catalytic rate is restored within 100-150 s to its initial value, since Na(Pt) is now pumped electrochemically as Na+ back into the P"-A1203 lattice. [Pg.437]

Lead Flotation Circuit Cells 1-2 Cleaners Cells 3-5 Roughers Cells 6-8 Scavengers... [Pg.219]

The flowsheet used in this plant (Figure 19.8) consists of a rod mill-ball mill grinding system and a copper rougher-scavenger flotation circuit, followed by two cleaning stages. Initially, the plant used a rake classifier, but now the rake classifiers have been replaced by cyclones. [Pg.59]

The flowsheet used to treat dolomitic oxide copper ores is somewhat different from that used in the beneficiation of siliceous oxide copper ores. This is due to the fact that dolomitic ore usually contains elevated amounts of slimes, in which case a split circuit flowsheet has been adopted in a number of operations. The typical flowsheet used for treatment of dolomitic ores is shown in Figure 19.8. Usually, the scavenger tailings are deslimed and the sand fraction is retreated in a scalp copper flotation stage. When the ore is deslimed before flotation, a large amount of fine copper is lost in the slime fraction. [Pg.61]

Under suitable pulp potential in the OPCF process, the flotation speed of galena is very fast and most galena has been floated just in rougher flotation stage. So the flotation cell of galena scavenger flotation operation can be diminished and the flotation circuit is further optimized. The comparison of operation parameters between traditional flowsheet and OPCF flotation is presented in Table 10.13. As can be seen, the flotation potential and time are lower in OPCF than in traditional flowsheet. [Pg.262]

Current flows when the electron/hole pair is prevented from recombining directly via percolation of the photogenerated electron to the ITO electrode and by scavenging of the hole by the solution electrolyte. The circuit is completed by reduction of the oxidized electrolyte species (S042- or S20(,2 ) at the platinum electrode. [Pg.272]

Additive processes ion implantation, 361 metal layer deposition, 361 resist requirement, 361 vapor dopant diffusion, 361 Additives for F scavenging, 415 Advanced very-large-scale integrated-circuit package, 490, 492 Aluminum... [Pg.529]

Some formulators additionally use oxygen scavengers or indicator dyes in their blends. An example of a formulation suitable for a closed-loop circuit that is primarily of carbon steel construction is as follows ... [Pg.176]

Under our optimized sampling conditions, no blocking of the trap (visually verified at the manometer of the scavenging gas circuit) and no losses of volatiles during the adsorption phase (sensorially verified at the odor port) were observed. [Pg.350]

Each light quantum effective in Reaction 1 eventually produces a second e aq via Reactions 2 and 3 (7), but scavengers such as 02, when present even in submicromolar concentrations, profoundly affect its formation and decay. To eliminate them we preirradiate our solutions with a second ultraviolet mercury lamp. After cleanup we can inject scavengers at micro- and submicromolar levels. During preirradiation and after the injection of samples, the solution in the cell is mixed by means of a small glass-encased iron rod, activated by a solenoid that receives repetitive pulses from a pulse-generating circuit. [Pg.273]

As Figure 2.45 shows, the Si etching rate in alkahne solution depends strongly on the applied potential with a maximum at open circuit potential [204, 207]. The etch rate decrease in the cathodic region, for example, is related to the kinetic stabilization of the surface kink site atoms by electrons from the conduction band of n-Si under accumulation conditions. The corresponding reaction sequence is shown in Figure 2.46. The scavenging of a conduction band electron results in... [Pg.113]


See other pages where Scavenging circuit is mentioned: [Pg.427]    [Pg.647]    [Pg.258]    [Pg.371]    [Pg.35]    [Pg.427]    [Pg.647]    [Pg.258]    [Pg.371]    [Pg.35]    [Pg.394]    [Pg.413]    [Pg.207]    [Pg.487]    [Pg.247]    [Pg.92]    [Pg.162]    [Pg.6]    [Pg.433]    [Pg.243]    [Pg.507]    [Pg.640]    [Pg.62]    [Pg.399]    [Pg.406]    [Pg.410]    [Pg.469]    [Pg.470]    [Pg.973]    [Pg.277]    [Pg.352]    [Pg.611]    [Pg.646]    [Pg.446]    [Pg.973]    [Pg.49]    [Pg.42]   
See also in sourсe #XX -- [ Pg.181 ]




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