Abstract
In the work thermo-adhesion a method of selecting and extracting the grains of diamond from a mixture of related minerals is developed. The study presents estimates of the heat transfer of the proposed scheme extraction based on the difference between the thermal conductivity of diamond and related minerals. The high selectivity thermo-adhesion selection and extraction of diamonds with the division concentrate on useful component and waste rock is shown.
Highlights
At present, the extraction of raw diamonds is one of the highly profitable and promising sectors of the mining industry (Milashev, 2013; Shirey et al, 2002; Banas, Stachel, Muehlenbachs, & McCandless, 2007; Tappert & Tappert, 2011; Howell, 2012)
Kimberlite or placer deposits are subjected to treatment by various methods to extract diamonds; removal of rock and other minerals occurs during enriching, and as a result, there a concentrate remains from which diamonds are extracted
As it seen from the scheme, the main characteristic of heat transfer is the thermal conductivity of diamond grains or an related mineral
Summary
The extraction of raw diamonds is one of the highly profitable and promising sectors of the mining industry (Milashev, 2013; Shirey et al, 2002; Banas, Stachel, Muehlenbachs, & McCandless, 2007; Tappert & Tappert, 2011; Howell, 2012). The temperatures of the heating element and the thermo-adhesion substance T2 and T1, respectively, are assumed to be constant, this is possible by adjustment in technological devices As it seen from the scheme, the main characteristic of heat transfer is the thermal conductivity of diamond grains or an related mineral. The amount of heat passing through the diamond decreases in inverse relationship to the grain size (Figure 3) As it is seen from formula (1), the amount of heat passing through the diamond particle is ~ 2-3 orders of magnitude higher than amount of heat passing through the related mineral of the kimberlite rock; this justifies the proposed scheme for the selection of diamond raw materials. The very high thermal conductivity of a diamond causes a high heat transfer, which necessary for melting the thermo-adhesion substance (Figure 1)
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