sulphide ore sag and ball mill grinding

Part of the expansion included increasing the refractory sulphide Fimiston grinding circuit under a range of operating conditions to SAG Mill Feed rate tſh 950 Speed 9 critical Balı Mills Ball size mm Speed 9 critical 68 ore characteristics This is illustrated in Table 2 where some of the mill performance

Bleiwas D I 2012 Estimated water requirements for the conventional flotation of copper ores U S Geological The crushed ore is transferred to a semiautogenous SAG mill or ball mill where the ore is the amount of water required to process copper sulfide ore through a conventional crush grind flotation concentrate nbsp

The HPGR process has the added advantages of lower capital and operating cost than say a SAG mill which is conventionally used in this application The ball mill is one of three mills in the mineral processing plant and is the heart of the concentrate recovery operation capable of grinding up to 4 5 million tonnes of ore nbsp

21 Mar 2016 In the original flowsheet for Canadian Malartic 39 s processing plant the cyanide used to extract gold was injected into the SAG mill at the start of the Comparison between steel and ceramic balls suggested that steel grinding media were probably the major culprit with the sulphide ore playing a small part nbsp

Industrial minerals Tungsten amp tin ALS Metallurgy has an enviable reputation for delivering the highest quality extractive metallurgical testing service with accurate and commodities incorporating Bulk crushing blending amp screening AG SAG milling Pebble ball amp rod milling High pressure grinding rolls

accurate way to measure ore hardness in a SAG environment Coupled with the standard Bond Ball Mill Work Index Test it is now possible to determine from these two relatively inexpensive laboratory tests the amount of energy required to grind an ore from the primary crushed size to the desired liberation size By

Santa Rita is the greatest nickel sulphide discovery in the world in the last 20 years ore is conveyed at 860 t h to the grinding circuit which includes one SAG mill Thus in this case the ball mill grinding circuit resulted in 99 9 efficiency

Two stage grinding circuit comprised of a single SAG semi autogenous grinding mill and two ball mills Bulk flotation in rougher and scavenger stages followed by cleaner flotation Centrifugal gravity pads three of which are generally used for sulfide ore and the fourth for partially oxidized ore West of the Main pit nbsp

Ball mills are usually found at the final stages of comminution because they are capable of fine finishing of the ore A SAG mill utilizes steel balls along with the ore material as grinding media Wills and Napier Munn 2006 In the Skorpion non sulfide zinc ore mine NIR was used to sort for processing of the ore rock

million tpa of sulphide ore to produce 800 000 ounces of gold per annum and is Australia 39 s largest gold producer CIRCUIT DESCRIPTION Run of Mine ore is crushed to –150mm by an Allis Chalmers 54 74 gyratory crusher This product is stockpiled as SAG mill feed on a coarse ore stockpile with a live capacity of 30 000 nbsp

hardness distribution for the ore body can be determined and grinding equipment Both plants were designed using SPI SAG Power Index and Bond Ball Mill Work A number of sulphide ores exhibit softness in the higher grade portions

27 Apr 2012 minerals of interest to recover them selectively Ore Textures Require Different Grinding Strategies Stages to liberate minerals Massive Sulphide Net Texture Mill Types AG Autogenous Mill Pebble Mill SAG Semi Autogenous Mill Rod Mill Ball Mill SRR Mill Sala Rubber Roller Mill

Mineral Research Centre JKMRC to optimise SAG mill circuit The iron oxides in the supergene zone show similar complexity to the copper sulphides Generally magnetite is oxidised to hematite and or goethite although some primary magnetite exists use a Semi Autogenous Grinding SAG mill ball charge of 8 v v

4 Apr 2017 This would make a sulphide rich concentrate which you may upgrade after a coarse grind in a rod mill or a ball mill if a finer grind is required to

grinding circuit consists of a SAG mill and ball mill each operating in closed circuit with a dedicated cyclone feed pump and cluster of hydrocyclones As part of the No 2 12 Mt y sulphide circuit upgrade a third crushing stockpile and milling train was installed and this is dedicated to treating sulphide ores Sulphide ore is nbsp

At Britannia the copper ore contained just over 1 copper though in the early Grinding – Ball Mills The ore would then flow into ball mills similar to the rod mills Steel balls inside the ball mills were about the size and weight of a shot put chemicals which enabled each sulphide mineral to be separated from the rest

19 May 2015 Abstract Comminution tests are an important element in the proper design of ore beneficiation plants In the past test work has been conducted for particular representative reference samples Within geometallurgy the entire ore body is explored in order to further identify the variation within the resource nbsp

Stirred milling was developed for fine grained ores that required an economic grind to sub 10 micron sizes Ball Mill Tower Mill IsaMill m Power Intensity Media Size No Balls m Surface Area kW m mm 20 20 95 500 120 40 12 440 000 200 280 1 between surface oxides and deeper primary sulphides

A SAG mill utilizes steel balls along with the ore material as grinding media Wills and In the Skorpion non sulfide zinc ore mine NIR was used to sort for

grinding production Keyworsd Minerals powder comminution grinding mills classification classifier grinding aids microwave ultrasound centrifuge control modelling conventional comminution devices like tumbling ball mills Because the HPRM is more efficient at lower energy inputs and the ball mill is more

of thumb that laboratory rod milling rather than ball milling produces a size distribution most circuits to crushing semi autogenous grinding SAG ball milling which closed circuit ball mill In case study 1 a survey was performed of the crushing grinding and flotation circuit of a concentrator treating a copper sulfide ore

The process of extracting gold from sulphide ore begins when the trucks deliver the ore from the blast site to the ROM run of mine pad at the Fimiston Plant The ore is then ground into very fine particles less than one fifth of one millimetre in diameter in large rotating SAG Semi Autogenous Grinding and Ball Mills which nbsp

flotation response of complex sulfide ores prepared by grinding in either an calibrate the Magotteaux Mill® Greet et al 2004 using SAG primary ball mills

The IsaMill is an energy efficient mineral industry grinding mill that was jointly developed in the In contrast ball mills rod mills and other tumbling mills are only partially The liberation of sphalerite zinc sulfide grains dropped from over 70 to just over 50 between 1984 and 1991 AG mill middot SAG mill middot Pebble mill

7 Oct 2014 ondary ball milling In these circuits the SAG mill is the largest energy consumer In many engineering projects either a power equation and or a specific energy equation are used for the designing of these Operational data from 4 grinding circuits corresponding to 3 sulphide ores are used in this work

capable of detecting changes in grinding parameters ore types etc Acoustic estimation of the particle size distributions of sulphide ores in a laboratory ball mill

Site Visit to review grinding operations for a single stage SAG Mill and optimization of circuit processing stockpile and sulphide nickel ores Assessment of a SAG mill ball mill pebble crushing circuit option for the existing autogenous

28 R J Doherty 1979 MEngSc A Study of the Copper Flotation Section of a Concentrator Treating a Complex Sulphide Ore 29 N Liyanaarachichi 1980 MSc Control of Variable Gap Crushers 67 B B Lira 1990 PhD The Development and Application of an Energy Based Ball Mill Simulation and Design Technique

Mining and ore processing at Antapaccay The mine consists of two pit operations and a concentrator plant The concentrator plant which consists of a semi autogenous grinding SAG mill and two ball mills can process 70 000 tonnes of copper sulphide ore per day using crushing and rotation Concentrate is thickened nbsp

18 Oct 2016 Sulphide Cu5FeS4 63 Hydrometallurgical process routes for copper oxide ores such as malachite and chrysocolla have followed a traditional stage SAG Ball Milling With the exception of Cerro Verde the SAG Ball mill grinding circuits have dominated all the large concentrator designs in the past two nbsp

Ultra Fine Grinding A Practical Alternative to Oxidative Treatment of Refractory Gold Ores S Ellis Kalgoorlie Consolidated Gold Mines Kalgoorlie WA Abstract sulphide minerals such as pyrite at conventional grind sizes pit blasting primary crushing secondary crushing SAG and ball milling are all able to

now dedicated to the mixed ores The Sulphide grinding circuit consists of a SAG mill and ball mill each operating in closed circuit with a dedicated cyclone feed

28 Oct 2015 Studies of SAG Mills performance show that poor quality cast grinding balls with porosity result in the production of a significant excess mass of steel scats in the SAG This generates iron ions detrimental to flotation which in turn depresses sulphide minerals and increases sodium cyanide consumption

minerals Broadly most sulfide minerals are more noble than forged steel grinding media used during comminution therefore a galvanic couple between the media and the sulfide Pulp chemical data for Magotteaux Mill® discharge and flotation feed for laboratory tests conducted on SAG mill feed samples ground with

Choosing an appropriate grinding circuit configuration depends on your ore We offer autogenous AG semi autogenous SAG ball rod and pebble mills in

capable of detecting changes in grinding parameters ore types etc Acoustic estimation of the particle size distributions of sulphide ores in a laboratory ball mill by C Aldrich and D A Theron Synopsis The acoustic signals emitted from a laboratory scale ball mill were used for the estimation of the comminution of two nbsp

Ore Mill 1 Denah Umum Wilayah Pabrik Pengolahan Bijih 2 Pabrik Pengolahan Bijih The ore mill processes ore from the mine by means of the following main concentrator areas North South Concentrators Concentrator 3 and Concentrator 4 Processing design capacity nameplate capacity is described in brief in nbsp

12 Feb 2017 Introduction Once the gold ore has been removed from underground and brought to surface an entirely new challenge begins in separating the gold from the waste material The separation process is particularly difficult due to the usually low quantity of gold relative to waste Common gold grades are in nbsp

Sulfide ore is ground up in the Semi Autogenous Grinding SAG and ball mills The ore rock slurry is concentrated in the flotation tanks Ray Mine Concentrator 39 nbsp

circuits to crushing semi autogenous grinding SAG ball for example have a steeper slope than ball mill grind size mill for a nickel sulfide ore Crosbieet al 2005 and B piston and die breakage versus hammer mill for a copper sulfide

sulphide minerals such as pyrite at conventional grind sizes pit blasting primary crushing secondary crushing SAG and ball milling are all able to

12 Feb 2016 Comminution circuit with Crushing SAG mill Screening Ball mill and Cyclone Process description In the grinding section there is a SAG mill in a closed circuit with 10mm screening aperture Gold ore chalcopyrite and pyrite as sulfide minerals the main gangue mineral is quartz · Head grades Au nbsp

Table 2 Milling circuit equipment specifications Parameter Sulphide Circuit Mixed Circuit Oxide Circuit SAG Mill Sec Mill SAG Mill Sec Mill SAG Mill Sec Mill Diameter m 9 442 6 1 throughput while ball mill and cyclone operations largely control product grind Mainza et al 2011 2015 Putland 2005 As a result nbsp

In the sulphide or telluride ore the gold is chemically combined with in diameter in large rotating SAG Semi Autogenous Grinding and Ball Mills which look

Each ore is different and requires laboratory testing to evaluate the grind size slurry pH slurry density required reagents and retention time Grinding Feed Final Tailings Final Willis jwillis srk co uk Dominga banded magnetite sulphide quartz mineralisation crushing SAG milling and ball milling Using a power nbsp

underground ore using conventional crushing grinding and flotation to of a single SAG semi autogenous grinding mill and two ball mills pads three of which are generally used for sulfide ore and the fourth for partially oxidized ore

4 Apr 2017 The processing in this case is a complex zinc tin mineral and we are afraid a SAG would P80 produces too much fines since the tin is to soft brittles tin This would make a sulphide rich concentrate which you may upgrade after a coarse grind in a rod mill or a ball mill if a finer grind is required to nbsp

power model on data of four sag mills treating sulphide copper ores in chile specific energy model on data of four sag mills models include the variable 1 design of the 40 foot sag mill installed at the minerals grinding mills recycle crushing and ancillaries i e lime addition ball addition the sag mill cost 12 2 million whilst nbsp

ball mill and SAG mill airstrip reticulated gas from the GGT pipeline bore fields powerhouse workshops core farm administration complex and a 270 room accommodation village The conventional Crushing grinding CIL Thunderbox CIL plant operated from 2002 to 2007 treating oxide transitional and sulphide ore nbsp

Attrition between grinding balls and ore particles causes grinding of finer particles SAG mills are characterized by their large diameter and short length as compared to ball mills The inside of the mill is lined with lifting plates to lift the material inside the mill where it then falls off the plates onto nbsp

process design and development for the 4 000 tpd copper nickel sulphide concentrator design construction and operation of a pilot plant conceptual design Author of 45 technical papers concerning grinding and SAG milling in particular and mineral processing in general which have been published in journals and nbsp

24th World Mining Congress PROCEEDINGS – MINERAL PROCESSING process routes will follow either an oxide route or a sulphide route With the exception of Cerro Verde the SAG Ball mill grinding circuits have dominated all the

Reclaimed ore is conveyed at 860 t h to the grinding circuit which includes one SAG mill two pebble crushers and two ball mills The grinding circuit is The desliming product is pumped to the concentration circuit based on the direct flotation of sulphide nickel minerals together with copper cobalt and PGM minerals

mills and onto the secondary ball mill circuits alleviating a crushing SAG milling and ball milling Using a Throughput estimates for different ore types for a specified grinding mill design intergrowth of sulfide minerals and different sizes