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Pyro-metallurgy of copper production is characterized by the output of copper slag, which is regarded as a kind of solid waste. Moreover, this slag is identified as hazardous because it contains impurities, like Pb, As, and Cu. Obtaining dump slags in autogenous processes does not always meet the requirements of effective technologies, most often slags contain more than 1.0% of copper and need to be depleted. This work is presented a brief analysis of existing technologies used for copper slag depletion. The analysis of the existing technologies for the depletion of autogenous smelting dump slags showed that the most promising option seems to be the depletion of copper slags in one PV unit since by improving the process itself, by changing the unit design, it is possible to achieve technologically complete production of matte and dump slag with low copper content. There were proposed two technologies of improvement: electro-heating of slag siphon using the graphite electrodes and depletion process in two-zone PV furnace.

Key indicators: single-crystal X-ray study; T = 298 K; mean (C-C) = 0.008 A ˚ ; R factor = 0.070; wR factor = 0.135; data-to-parameter ratio = 13.8. In the solid state, the structure of the title compound, C 18 H 15 N 5 , is stabilized by weak C-HÁ Á ÁN interactions. Molecules are arranged in layers parallel to the bc plane forming an interesting supramolecular structure. Related literature For coordination polymers and supramolecular structures, see: Itoh et al. (2005); Albrechet (2001); Leininger et al. (2000). For potential applications in catalysis, gas storage, chirality, optics, magnetism, nanotechnology and luminescence, see: James Experimental Crystal data C 18 H 15 N 5 M r = 301.35 Monoclinic, Pc a = 5.7174 (11) A ˚ b = 8.0934 (10) A ˚ c = 16.972 (4) A ˚ = 99.690 (18) V = 774.1 (3) A ˚ 3 Z = 2 Mo K radiation = 0.08 mm À1 T = 298 K 0.42 Â 0.18 Â 0.12 mm Data collection Bruker P4 diffractometer 3235 measured reflections 2874 independent reflections 1159 reflections with I > 2(I) R int = 0.061 3 standard reflections every 97 reflections intensity decay: 11.5%

Металлургия және IV-тен V валентті ванадийге дейін тотықтанады, бұл кектердің гидрометаллургиялық өңделуі, яғни іріктеп еріту кезінде ванадийдің мөлшерін едәуір арттырады. Түйін сөздер: ванадийқұрамды кен, күйдіру, кальцийленген сода, натрий хлориді, жартылай сандық рентгенфазалық және спектрлік талдаулар.