As per UNFC system, as on 1.4.2005, the total resources of gold ore in the country were estimated at 390.29 million tonnes. Out of these, 19.25 million tonnes were placed under reserves category and the remaining 371.04 million tonnes under remaining resources category. Total resources of gold (primary), in terms of metal, stood at 490.81 tonnes. Out of these, 85.12 tonnes were placed under reserves category and 405.69 tonnes under remaining resources category. The resources include placer-type gold ore in Kerala estimated at 26.12 million tonnes containing 5.86 tonnes gold metal. By States, largest resources (57%) are located in Bihar in terms of gold ore (primary) followed by Karnataka and Rajasthan (17%) each, West Bengal and Andhra Pradesh (3%) each, Madhya Pradesh (2%), etc., while in terms of metal content, Karnataka remained on top followed by Rajasthan, West Bengal, Bihar, Andhra Pradesh, etc.
GSI, MECL, HGML and DMG, Rajasthan and Karnataka carried out exploration for gold in 2009-10. Gold, along with other minerals, continued to be the principal thrust area for exploration by GSI in Andhra Pradesh, Bihar, Jharkhand, Karnataka, Rajasthan and Uttarakhand,(gold complete processing plant for sale india).
MECL carried out exploration for gold in Jharkhand. HGML conducted exploration in its mining lease areas viz, Hutti, Hira-Buddini and Uti Gold Mines in Raichur district in Karnataka. DMG, Rajasthan and DMG, Karnataka carried out exploratory work in Jaipur district and Davangere district, respectively. Details of exploration activities undertaken in 2009-10 by various exploratory agencies are furnished(designing small scale gold processing plant ).
Presently, HGML is the only public sector company producing gold in the country(Gold ore processing plant India). Manmohan Industries Pvt. Ltd in private sector is also engaged in mine production of gold. HGML operates mines at Hutti, Uti and Hira-Buddini in Raichur district, Karnataka. The total installed capacity of these mines is 7.02 lakh tpy gold ore. Implementation of mechanisation of mining operations at Hutti mine was in progress.
Exploratory developments were taken up in all reefs and cross-cutting in south shaft 3rd and 6th lavel is under way. Sub-level and LDBH stoping methods are employed to exploit the gold ore. The Uti mine is opencast and the ore from this mine is transported to Hutti mine for processing at the mills. The present capacity of the mine is 25,960 tpy of ore. As per the feasibility studies, opencast mining is viable and will be continued to 90 m vertical depth. Underground exploratory mining too is in progress,(mobile jigging in gold ore beneficiation).
Several operations at Hira-Buddini gold unit, such as exploratory mine development and deepening and re-equipping of main shaft are in progress. The present production capacity of the mine is 20,050 tpy. Exploratory mine development using manual compressed air jackhammer drilling and electrical hoist for winding in the shaft too is presently underway. Based on the development work and feasibility, the locomotive loaders, wagon drills and other required machinery will be used to increase the OMS. Further forays to carry out detailed exploration by exploratory mine development are under consideration. The stoping preparation was in progress.
The production of gold ore at 518 thousand tonnes in 2009-10 decreased by 12% as compared to that in the previous year. The quantity of ore treated decreased from 577 thousand tonnes to 541 thousand tonnes registering a fall of 6% as compared to previous year. Four mines reported production of gold ore in 2009-10, same as in 2008-09. The average grade of gold ore produced during 2009-10 was 5.65 g/t as against 5.84 g/t in 2008-09, whereas, the average grade of ore treated during 2009-10 was 3.80 g/t as against 4.23 g/t in 2008-09.
Total production of gold (primary) in 2009-10 at 2,106 kg decreased by 14% as compared to that in the preceding year. No production of secondary gold was reported since 2007-08 from domestic ores.