COPPER is an essential metal in  modern  industry.It is

one of the metals in  which  India is deficient,with an annual production of only about 10000 tonnes against her estimated requirement of 124000 tonnes at the end of the fourth plan period. Because of the severe import restri-ctions and increased growth of  copper  consuming indus-tries, it has become an  absolute  necessity to produce this vital metal from the  available  deposits in India and intensive efforts are being made to raise the output to about 50000 tonnes by the end of the Fourth Plan

Banerjee, S K

Ganesh, R

Narayanan, P I A

English

Copper is one of the important industrial  metals in which India is deficient, with  an  annual  production on only about 10000 tonnes against her estimated  requirement of 1,24,000 tonnes at the end of the  fourth  plan period. Due to increasing demand of  the  vital  metal, intensive efforts are being made to raise the output to about 50000 by the end of the fourth plan from the available workable deposits in the country. At  Present workable deposits of copper ore  occur mainly  in  Bihar  and  Rajasthan. The deposits in Bihar are being Worked by M/s. Indian  Copper Corporation Ltd:, who are, raising their annual production from 10,000 tonnes to 16000 tonnes. The copper ore deposits

of Rajasthan are located  mainly  in  Khetri, dariba  and

Kolihan. Government of India has finalised  setting up of an integrated plant  to  produce  31000 tonnes  of copper metal annually at khetri which will include  10,000 tonnes from the adjacent line of Kolihan

eprints@NML

PAPER -No: 4 3 ;. BENEFICIATION STUDIES ON COPPER CITE } SAMPLES FROM RAJ-ASTHAN! (*), . R.Ganesh, S.K.Banerjee .8c P . . A. Narayanan, - Wational_Metallurgical Laboratory, Jamshedpur. • . . 	 . 	 . Copper is .one of the Impprtant,(1.nda4ti*ial metals in which .India 	 deficient, with an anntal production. of only ,abOtit, 10,000 'tonnes .against her ,estimated - requirerrkent of 1, 24,004. tonnes at the end of the fourth plan-period. Due to ,increasing demand of this vital metal, intensive efforts are being made to . • raise the output to .about 50,000 tonnes by the end of the .fotirth plan-from the available workable deposits in the'dountry.. At Presont workable deposits of copper ore • Occur-mainly in'•ihar and Rajasthan-. The deposits in Bihar are being -Worked by M/-s. Indian Copper Corporat-, ion Ltd:, who -are, raising' their . -anndal production from 10,000 tonnes. to•:1,060 tonnes. The copper- ore deposits of Rajasthan• ard"located mainly in Khetri, .bariba and Kdlihan. Governii}ent 'of India has finalised setting up of an integrated :plant - to' produce 31;000 tonnes of copper metal annually at - K•etri which will include 10,000 tonnes from the adjacent sine of Kolihan. The •Ore bre”ini Division• of the -National Meta- •llurgical Laboratory right from its inception, is  actively engaged in beneficiation studies on various ;,types of low grAae ores received• from all ever India and has developed suitable beneficiation' techniques for different Ores... .To' study ;the technical feasibility and economics of various treatmentprocesses an integrated mineral beneficiation. pilot - plant of capacity 1 to 20 'tonnes of ore per hoUr'has been set up at- the National Metallurgical LaboratOry, 'where unique facilities are available for cOntinUou's 'treatment of any type of low -,grade ores. 	 , (*) Paper for,•resentation at the Symposium on "Recent Developments ir-i'No-n-Terrous Metals' Technology" 4th to 7t111.1?ecember, 19€8, Jamshedpur. Not to be reproduced in any media (C) National Metallurgical Laboratory, Jamshedpur. • 'I -2- 	 L- 14 At.-;:the instance. of the National Mineral Developmetit . Corporation, comprehensive .b.eneficiation studies were undertaken in National Metallurgical-Laboratory on low grade frpria,.Khetri, Kolihan and Ghatiwali Adit deposits of R_alaStbarh.:4-ith.:a - view to producing copper concentrate suitable!: for 'smelting.. Copper ore from Khetri  • Systematic;studieS.e.dploying batch as well as pilot plant tests _were. conducted on a bulk sample from Khet=1 ass#ing 	 g, p2% 41263, 	 dtort/to n • ;Au • and :2.37: ditt/alob 	 Citiart 	 chloriteel garnet and'biotit.e were_ the 	 .p 	 .geingue minerals in • the 	 The. sulptiide minerals .present=in,:, the sample in ClialCopyrite and pyrite, '•••,.(.331Ctaic-OPyr.A.te was tinely.;.:disSeMinatO but-'was liberated at = - 150 mesh. • , .  -'• 	 Optimum Conditions' for foligher""flotation:.were btained when f e ed:, haVing 73.3% 200 _ m.esh fraction acti was - • 	 _ §.1tg/ tonne', of•= I 	 - Icgtto tin e of i•otag,giutn!'ethA .zanthate and 0:025-:•:Kg7tonne.Of pine oil, Lime iidS..addedipaS, :a depresSanV 	 e. 'for pyritpyrrhotite to maintain t:he pii.:bet.Ween'..9.' and 9,•4.: - :Flotation.'followed by two ,eleaTtirys:.or-the rougher float yielded a copper concentrate .assaying 24.4% . CUI'with a recovery of 77.8%. tatiOn o.f the ground. ,middl'ings prOduced a second 'COnCerittate. aSsaying..21.7%: Cu with an additional- recovery '2.- 8%:Zu.,-..-Aerofleat 238. ind.'higher!.3tanthates. were found AO. be :-bettOr 	 tors for ohal.copyrite.: than :ethyl ,x ant• hat:e f 	 pyrite pyrr-  ho•  tit e • 'cnc entr ate s ayin g 36.257..3 with.4 .irecp:very o.f 29.07:_was'produced from the - 	 . tailings at0•41-1. of 5.5 using- sulphuric acid as pH regulator and pdtaffsiUm amyl 3tarithat 	 'oollector. :'"girice•the ore contained PredOMinantlt pyrrhotite, the • - possibilities of:. ecO:nOmic4lY pr-ddlicinga -high grade -Etpyrite-ijyrrhotite.f Orieentrate assaying. .Oyer 	 S for acid manufacture fro thia-bre'' are very:,remote - Based of- .Laboratory scale tests, , pilot -plant studies were undertaken with-a. 20 .tonne bulk sample. :Re'sults.ofpilot j lant studies were i? 	 more Or:lesS similar to those. =obtained O'W a batch seale,;• The final •-copper concentrate Obtained troth pilot plant studies assayed between 19.0 & 27.0%'xd.,:vith..iecoVeries ranging from 88.0% to 77% Cu. The flotation. concentrate con. tainedl. 6 . dwtjton, Ag..,and 22.8 dwt/ton .Ag: with recoveries of ' 30' and 	 .catIt':-,gold. • and 	 respectively. L-14 Copper ore from ,ahaftNo A second sample from Kbetri assaying ,'0179% Cu, 20 	 Fe) 2.85% -5,_. 52.82% 810, 10.2%41 203, 5109%- MgO, 08 ciwt/ton* Au and 1.7- dwt/ton Ag waS'ral so investigated in the Laboratory,. The metallic minerals present in the ...are in ord'er df'-a.bundance were magnetite,;--chalcopyrite, .,pyrrhotite, pyrite _and -marcasite: Quartz . and chlorite  _conitituted- the principal siliceous gangue.,,in the ore, _ ChaD.cçrr±t -was well liberated below -150- mesh The itmum grind for rougher notation was found to be 69.5% 4.20011'4sh.. ,Roughing followed by -three cleanings  of the ,rougher float produced a final concentrate •assayink 1942% Cu with a recovery of 75.0% Cu. Pyrite-pyrrhotite flotation from the mixed copper tailipgs did not yield a satisfactory grade of concentrate, A series of batch scale two cycle locked tests were carried out to simulate continuous flotation conditions by returning the middlings to the circuit. -.Two cycle ,4 locked tests with two cleanings produced a concentrate assaying 14.98% Cu, 38,08% Fe and 39.54% S with a recovery of 75.9% Cu. This product is suitable for flash 'smelting for extraction of copper in the - propo.se& plant, at-Khetri.  Copper ore-.'fromjkolihan 	 - 	 E Flotation studies were•uhdertaken on a low grade copper ore 'from Kolihan, Rajasthan. The sample as received assayed 2.69% Cul 15.5% Fe, 8.2% SI 50.2% Si02, 8.9% A12011) 24 6 dwt/ton Ag and 0.19 dwt/ton Au. Mineralogical studies indicated that pyrrhotite and chalcopyrite were the chief sulphides present with minor amounts of pyrite. Bulk of the ore was composed of siliceous gangue, namely quartz and chlorite and liberation of chalcopyrite occurred at about 150 me,s,h size. The optimum grind for rougher flotation was - found to be 52.2% -200 mesh. A copper float assaying 16.6% Cu with 97.4% recovery was obtained using 0.07 Kg/ 	 tonne of potassium ethyl xanthate and 0.01 Kg/tonne of pine oil at pH 9.5. Reflotation of the rougher float _produced a high grade copper concentrate assaying V.4A Cu, 33.7% S, 31.6% Fe, 2.17% 5102, 1.42% A1203, 2 dwt/ton Au and 13.5 dwt/ton Ag with a recovery of 93.8% Cu. The recovery is expected to improve further in actual plant practice when the cleaner tailings will- be recirculated. Pyrite-pyrrhotite flotation of the copper tailings yielded a concentrate assaying 38.0% S with a recovery of 40.4% S. -4- 	 L-14 Corner ore from Ghatiwali Adit_ Khetri •This sample assay.- ed Q.0 99% ci.fl....234 1%.„- Fali-.6,08% SI 42,38% 31021  0.14 dwi:./ ton Au and 2,26 dwt/ton Ag, Pyrrhotite and chalcopyrite constituted the, chief sulphide minerals jthe ore, LiberatiOn of'-..chalcopyrite from the siliceous 'gangue occurred at 150 mesh... Flotation -followed.. by three :cleanings of the-;rougher .float produced a .copper. concentrate, assaying .20.4.8%.:CU;. 33.3% Fel 30.1% 3  !--; with a recovery of•g2;0% Cu, When thej..4-rougher concentrate - . . was reground to 10.0%-200: mesh before 'Cleaning;„ the . qade improve to 29, l2 Cu 33,4% -SI 3l., 1% 'Fe; 2, 2 dwt/ton Au and 01.8-idwt/ton Ag with a copper 'recovery of -804 2Se. .CbrcluiQ Systematic flotation studies were undertaken on the low grade copper o'e deposits Of Rajasthan and optimum conditions determinedllfor flotation. The results indicated that all the ore are amenable. fo boneficiation 'to make them suitable for copper extraction. Broadly based ,.on the studies made in the Yational Metallurgica2. La.boratory on low grade copper ore deposits of-Khetri, the Government of India is setting up a milling and extraction plant at Khetri which is being worked, by WS Hindusthan CoppEx L td,, ;-: • /Ahmed : 

Beneficiation Studies on Copper Ore Samples from Rajasthan

Beneficiation studies on Copper ore samples from Rajasthan

http://eprints.nmlindia.org/4487/1/Paper_No.43.PDF

Beneficiation studies on Copper ore samples from Rajasthan

Abstract

Similar works

Full text

Available Versions

eprints@NML

eprints@NML