Monastyrsky V.F. On the issue of man-caused damageability of diamond

Details

Parent Category: Geo-Technical Mechanics, 2018

Category: Geo-Technical Mechanics, 2018, Issue 138

Geoteh. meh. 2018, 138, 185-195

DOI: https://doi.org/10.15407/geotm2018.01.185

On the issue of man-caused damageability of diamond

Monastyrsky V.F.

Authors:

Monastyrsky VF, Dr. Tech. Sciences, Professor, Senior Researcher (IGTM NAS of Ukraine)

UDC 622.724; 622.76

Language:Russian

Abstract.

In the article, results of scientific and practical studies of diamond damaging during technological operations are presented. Problems of diamond damaging due to explosions, in the crushers, presses, due to the grinding wet autogenous mills and during transportation by the belt conveyors and hydraulic transport are considered. It is established that integrity of diamonds is better at optimal parameters of technological operations. Technology of shooting operations assumes adjusting of explosion energy effected on the face in such a way when kimberlite is destructed before the explosive wave reaches crystal of the diamond giving the crystal no chance to be damaged due to the compression of surrounding rocks. During the technological operations, volume of kimberlite and free diamonds is compressed, and proper rate of the compression should be provided by the devices with controlled maximum rate of compression. When diamond-contained raw materials are ground by the wet autogenous mills, diamond damaging directly depends on the mill’s operational mode. The optimal mode is cascade:  diamond damaging is 1.5-2 times less. When raw material is transported by the belt conveyor or hydraulic transport, the most important factor is power of interaction between diamond and elements of conveyor or discharge sector of hydraulic pump. Probability of diamond damaing in the charge sector of conveyor is 3 times less than in hydraulic pump. It is recommended to use bore-hole charges with air interval; ore-crushing presses with system of controlled compression maximum; optimal frequency of drum rotation in the wet autogenous mills: (0.60‑0.65)n_kр for wet autogenous mills 9,0´2,8; and 0.50 n_кр for TGL 5.0´2.3; belt conveyor equipped with roller carriages and shock absorber installed in the charge sector.

Keywords:

diamond damaging, technological operation, explosion, parameters, mode, press, crusher, mill, conveyer, pump, energy, tensions, probability.

References:

1. Zuyev, V.M. (2011), “Increasing the safety of diamonds in mining and beneficiation – one of the key areas of the innovation policy of AK ALROSA”, Problems and ways of effective mining of diamondiferous deposits, Nauka, Novosibirsk, RF.

2. Konovalenko, V.Ya. (2005), “Results of full-scale experimental studies of technogenic damage to diamond crystals in the process of explosive breaking, mechanical crushing and grinding”, Fiziko-tekhnicheskiye problemy razrabotki poleznykh iskopayemykh, no. 1, pp. 63‑71.

3. Bondarenko, I. F. (2002), “Influence of explosion parameters on diamond damage”, Mining Journal, no. 4, pp. 37‑40.

4. Firm Kluff starts to carry out the project of processing of diamonds in Copeton (1990), Mining Mag., no. 1, pp. 62‑68.

5. Rakhmeyev, R.N., Prokopenko, A.V. and Kononko, R.V. (2011), “The study of diamond damage at the re-grinding of kimberlites in a high pressure roll press”, Problemy i puti effektivnoy otrabotki almazonosnykh mestorozhdeniy [Problems and ways of effective mining of diamondiferous deposits], Nauka, Novosibirsk, RF, pp. 318‑322.

6. Zyryanov, I.V., Bondarenko, I.F., Khon, V.I. and Chernykh, Ye.N. (2015), “Investigation of the features of explosive destruction of kimberlites in the deep open pits of AK ALROSA”, Mining Journal, no. 6, pp. 41‑44.

https://doi.org/10.17580/gzh.2015.01.07

7. Monastyrsky, V.F. and Solovyev, S.V. (2004), “Optimization of regimes of self-grinding mills during the enrichment of diamond-containing raw materials”, Mining Journal, no. 6, pp. 45‑49.

8. Monastyrsky, V.F. and Solovyev, S.V. (2005), “On the damageability of diamond crystals in the grinding of diamond-containing raw materials in MMC”, V kongress obogatiteley stran SNG [V Congress of the Enrichers of the CIS Countries], Moscow, Russia, March 23‑25, pp. 257‑259.

9. Vedin, V.T. and Bondarenko, A.F. (1995), Informatsionnaya zapiska po rezultatam issledovaniy s tselyu izucheniya vliyaniya na sokhrannost almazov predvaritelnogo grokhocheniya iskhodnogo materiala pered protsessom samoizmelcheniya [Information note on the results of studies to study the effect on the safety of diamonds of preliminary screening of the starting material before the self-crushing process], Yakutniproalmaz, Mirnyy, RF.

About the authors

Monastyrsky Vitaly Fedorovich, Doctor of Technical Sciences (D. Sc), Professor, Senior Researcher in Department of Mining Transport Physics and Mechanics, Institute of Geotechnical Mechanics named by N. Polyakov of National Academy of Science of Ukraine (IGTM NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

• < Prev
• Next >