function copper ore ball mill

function of ball mill in making ore

function of copper milling ball mill Copper Ore Ball Mill. Copper ore ball mill To make best use of the copper ore grinding is one of the most energy-intensive production stages and therefore has a substantial energy-saving potential The main demands made on grinding plants are low operating costs and high availability even when grinding extremely abrasive materials Copper ore

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Ball Mills - Mine Engineer.Com

Most ball mills operate most efficiently between 65% and 75% of their critical speed. Photo of a 10 Ft diameter by 32 Ft long ball mill in a Cement Plant. Photo of a series of ball mills in a Copper Plant, grinding the ore for flotation. Image of cut away ball mill, showing material flow through typical ball mill.

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Copper Flotation - 911 Metallurgist

16/05/2016  The rod mill and two ball mills are approximately the same size for simplified maintenance. Porphyry copper ores, usually medium to medium hard, require grinding to about 65-mesh to economically liberate the copper minerals from the gangue. Although a clean rougher tailing can often be achieved at 65-mesh the copper mineral is not liberated sufficiently to make a high grade copper concentrate, thus some form of regrinding is necessary on the rougher flotation copper

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Advanced Controller for Grinding Mills: Results from a ...

MILL CONTROL: BALL MILL CONTROL EXAMPLE Process Description The copper concentrator in Pinto Valley, Arizona processes a 0.4% grade copper ore from a nearby open pit mine. The unit operations consisting of crushing, grinding, and flotation process about 65,000 tons of ore per day in six overflow ball mills. The concentrate is transported to a smelter a few miles away. The

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Energy Efficiency Analysis of Copper Ore Ball Mill Drive ...

Milling is among the most energy-consuming technological stages of copper ore processing. It is performed in mills, which are machines of high rotational masses. The start of a mill filled to capacity requires appropriate solutions that mitigate the overloading. One method for increasing the energy efficiency of ball mills is to optimize their drive systems.

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Determination and scale-up of the milling parameters of a ...

containing copper-cobalt-bearing ore, it is essential to reduce the ore to talcum powder fineness in order to liberate the copper and cobalt minerals. In fact during the milling,

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Ball mill - Wikipedia

The ball mill is a key piece of equipment for grinding crushed materials, and it is widely used in production lines for powders such as cement, silicates, refractory material, fertilizer, glass ceramics, etc., as well as for ore dressing of ferrous and non-ferrous metals. The ball mill can grind ores and other materials, wet or dry. There are two kinds of ball mills according to their ways of discharging material:

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Telfer Project Process Plant Design

sulphide reef ores to stockwork ore, oxide copper minerals to chalcopyrite, siltstone to competent quartzite, ... • detailed review of scale-up of SAG and ball mill pilot plant data to plant scale, • the selection of two 15 MW SAG mills and two 13 MW ball mills for the grinding circuit, and • detailed modelling of the pyrite concentrate carbonin-leach (CIL)/sulphidisation acidification ...

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Copper Flotation - 911 Metallurgist

16/05/2016  The rod mill and two ball mills are approximately the same size for simplified maintenance. Porphyry copper ores, usually medium to medium hard, require grinding to about 65-mesh to economically liberate the copper minerals from the gangue. Although a clean rougher tailing can often be achieved at 65-mesh the copper mineral is not liberated sufficiently to make a high grade copper

More

Ball Mills - Mine Engineer.Com

Most ball mills operate most efficiently between 65% and 75% of their critical speed. Photo of a 10 Ft diameter by 32 Ft long ball mill in a Cement Plant. Photo of a series of ball mills in a Copper Plant, grinding the ore for flotation. Image of cut away ball mill, showing material flow through typical ball mill.

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Copper extraction - Wikipedia

Copper extraction refers to the methods used to obtain copper from its ores.The conversion of copper consists of a series of physical and electrochemical processes. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors.. As in all mining operations, the ore must usually be beneficiated (concentrated).

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Energy Efficiency Analysis of Copper Ore Ball Mill Drive ...

Milling is among the most energy-consuming technological stages of copper ore processing. It is performed in mills, which are machines of high rotational masses. The start of a mill filled to capacity requires appropriate solutions that mitigate the overloading. One method for increasing the energy efficiency of ball mills is to optimize their drive systems. This article looks at two variants of drive

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Energy Efficiency Analysis of Copper Ore Ball Mill Drive ...

23/03/2021  drive system to be overloaded when the mill filled with copper ore is started. For this reason, the mill is stopped only in the case of a failure or planned maintenance work. The aim is to minimize the potential number of start-ups, as the mill at a standstill must be later started under full load. In the case of a prolonged downtime, the moist ore inside the mill hardens. During start-up, the mass

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Telfer Project Process Plant Design

ball milling and differential flotation of copper and pyrite concentrates. 2. SAG/ball milling and generation of a bulk flotation concentrate for hydrometallurgical plant treatment on site. 3. SAG/ball milling and differential flotation of copper and pyrite concentrates. 4. Stage crushing including High Pressure Grinding Rolls (HPGR) followed by ball milling and the bulk

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What is a theoretical grade-recovery curve? An example ...

26/10/2009  The following example shows the key aspects of using the theoretical grade-recovery curve for a copper flotation circuit where chalcopyrite is the major copper bearing mineral. The material in this example was ground to P80 of 125 micron in a closed ball mill circuit prior to flotation. Figure 1 shows the theoretical grade-recovery curve determined from the liberation characteristics of this ...

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Grinding Media Balls for Mines and Minerals Processing ...

Copper. Bauxite. Lead – Zinc. Rock phosphate. Metal slag. Coal. There is no standard solution for mineral industry and wear rate of grinding media varies from mine to mine, ore to ore and even for the same ore time to time. Different alloys are recommended depending on ore type and mill particulars in order to arrive at the most cost economic ...

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Hydrocyclone Working Principle - 911 Metallurgist

06/08/2015  The entrance to the cyclone was designed this way to allow the incoming feed to help generate and not interfere with the spiral path that the ore must take inside the cyclone. The centrifugal force (the central Hydrocyclone Working Principle) that is generated by this spin, forces the “bigger particles outwards towards the wall of the cyclone. If you were able to do a cross section of a cyclone

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Wear of grinding media in the mineral processing

Each of these mill environments presents a unique environment for grinding media, requiring the application of specific physical and chemical properties for optimum grinding media performance. The environments are characterized by varying degrees and combinations of abrasive, corrosive, and impact wear. An extensive test program has been conducted to determine the extent wear rates vary between these different applications. Test results are related to production results, ball size, and mill ...

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Ball Mills - Mine Engineer.Com

Most ball mills operate most efficiently between 65% and 75% of their critical speed. Photo of a 10 Ft diameter by 32 Ft long ball mill in a Cement Plant. Photo of a series of ball mills in a Copper Plant, grinding the ore for flotation. Image of cut away ball mill, showing material flow through typical ball mill.

More

Energy Efficiency Analysis of Copper Ore Ball Mill Drive ...

23/03/2021  drive system to be overloaded when the mill filled with copper ore is started. For this reason, the mill is stopped only in the case of a failure or planned maintenance work. The aim is to minimize the potential number of start-ups, as the mill at a standstill must be later started under full load. In the case of a prolonged downtime, the moist ore inside the mill hardens. During start-up, the mass is thus

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MineralsEd: By Teachers, For Teachers

The ore first enters the ball mill circuits which pulverize the ore to sand. From the ball mills, the slurry is piped into flotation cells which float a mixed copper and molybdenite concentrate, which is piped to a second flotation circuit where the molybdenite and copper concentrates are separated. These concentrates pass through a thickener before being dried. Tailings that settle out of the ...

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Ball Mill: Operating principles, components, Uses ...

05/07/2020  A ball mill also known as pebble mill or tumbling mill is a milling machine that consists of a hallow cylinder containing balls; mounted on a metallic frame such that it can be rotated along its longitudinal axis. The balls which could be of different diameter occupy 30 – 50 % of the mill volume and its size depends on the feed and mill size. The large balls tend to break down the coarse feed

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Telfer Project Process Plant Design

ball milling and differential flotation of copper and pyrite concentrates. 2. SAG/ball milling and generation of a bulk flotation concentrate for hydrometallurgical plant treatment on site. 3. SAG/ball milling and differential flotation of copper and pyrite concentrates. 4. Stage crushing including High Pressure Grinding Rolls (HPGR) followed by ball milling and the bulk

More

What is a theoretical grade-recovery curve? An example ...

26/10/2009  The following example shows the key aspects of using the theoretical grade-recovery curve for a copper flotation circuit where chalcopyrite is the major copper bearing mineral. The material in this example was ground to P80 of 125 micron in a closed ball mill circuit prior to flotation. Figure 1 shows the theoretical grade-recovery curve determined from the liberation characteristics of this ...

More

Grinding Media Balls for Mines and Minerals Processing ...

Copper. Bauxite. Lead – Zinc. Rock phosphate. Metal slag. Coal. There is no standard solution for mineral industry and wear rate of grinding media varies from mine to mine, ore to ore and even for the same ore time to time. Different alloys are recommended depending on ore type and mill particulars in order to arrive at the most cost economic ...

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TECHNICAL NOTES 8 GRINDING R. P. King

The geometry of a mill with conical ends is shown in Figure 8.6. The total volume inside the mill is given by Vm 4 D2 mL 1 2(Lc L) L 1 (Dt/Dm) 3 1 Dt/Dm (8.16) The density of the charge must account for all of the material in the mill including the media which may be steel balls in a ball mill, or large lumps of ore

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AMIT 135: Lesson 2 Circuit Mass Balancing – Mining Mill ...

For example, assume that raw ore is a two component system comprised of a valued mineral and host rock having relative densities of 6.30 and 2.65, respectively. The amount of valued mineral is 30% of the total ore.Total Solid Mass, M: Mineral + Host Rock – 30 +

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Kamoto Mine, Lualaba, Democratic Republic of Congo

The sulphide ore from KTO is currently treated in a separate sulphide mill and float circuit of the new KTC circuit, with a capacity of 12 million tonnes per annum (Mtpa). The resultant concentrate, along with the concentrate produced from the mixed KOV OP and Mashambe East OP ore, is pumped to the roasters at Luilu for further processing. At the Luilu plant, the concentrate passes through ...

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MineralsEd: By Teachers, For Teachers

The ore first enters the ball mill circuits which pulverize the ore to sand. From the ball mills, the slurry is piped into flotation cells which float a mixed copper and molybdenite concentrate, which is piped to a second flotation circuit where the molybdenite and copper concentrates are separated. These concentrates pass through a thickener before being dried. Tailings that settle out of the ...

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The efficiency of copper ore comminution: A

This study analyzes the exergy efficiency of comminution using a laboratory sized dry ball mill and a copper mineral ore from central Chile. In this research, we develop a minimum work index from uniaxial compression tests results on the ore fitted to Morrell’s comminution energy equation using Hukki’s constant mineral parameter. An exergy analysis is then performed on a laboratory sized ...

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AMIT 135: Lesson 7 Ball Mills Circuits – Mining Mill ...

It has been recognized that the grindability of an ore in a ball mill is a function of both feed and mill parameters: Work index, W i; Largest particle size and size distribution; Density of solids and slurry; Mill diameter; Rotational speed; Rowland and Kjos (1980) defined the largest ball size needed based on these parameters: d↓B = 25.4 [(F↓80 / k) ↑0.5 (Ï â†“s ...

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What is a theoretical grade-recovery curve? An example ...

26/10/2009  The following example shows the key aspects of using the theoretical grade-recovery curve for a copper flotation circuit where chalcopyrite is the major copper bearing mineral. The material in this example was ground to P80 of 125 micron in a closed ball mill circuit prior to flotation. Figure 1 shows the theoretical grade-recovery curve determined from the liberation characteristics of this ...

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Milling Mineral Processing Extractives Hub

Crushed ore is fed into Mills in which the ore is mixed with water and may be ground down to a particle size, in the case of gold and copper, of about 75 microns (0.075mm). The fine, powdered ore emerges from the mills mixed with water in a thin, wet paste called Pulp or Slurry. In the ASM sector, Stamp Mills are still in common use, especially in gold mining, but the more efficient and m ...

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Grinding Media Balls for Mines and Minerals Processing ...

Copper. Bauxite. Lead – Zinc. Rock phosphate. Metal slag. Coal. There is no standard solution for mineral industry and wear rate of grinding media varies from mine to mine, ore to ore and even for the same ore time to time. Different alloys are recommended depending on ore type and mill particulars in order to arrive at the most cost economic ...

More

Kamoto Mine, Lualaba, Democratic Republic of Congo

The sulphide ore from KTO is currently treated in a separate sulphide mill and float circuit of the new KTC circuit, with a capacity of 12 million tonnes per annum (Mtpa). The resultant concentrate, along with the concentrate produced from the mixed KOV OP and Mashambe East OP ore, is pumped to the roasters at Luilu for further processing. At the Luilu plant, the concentrate passes through ...

More

AMIT 135: Lesson 2 Circuit Mass Balancing – Mining Mill ...

For example, assume that raw ore is a two component system comprised of a valued mineral and host rock having relative densities of 6.30 and 2.65, respectively. The amount of valued mineral is 30% of the total ore.Total Solid Mass, M: Mineral + Host Rock – 30 +

More

TECHNICAL NOTES 8 GRINDING R. P. King

The geometry of a mill with conical ends is shown in Figure 8.6. The total volume inside the mill is given by Vm 4 D2 mL 1 2(Lc L) L 1 (Dt/Dm) 3 1 Dt/Dm (8.16) The density of the charge must account for all of the material in the mill including the media which may be steel balls in a ball mill, or large lumps of ore

More

The Selection and Design of Mill Liners - MillTraj

Figure 5. High–low wave ball mill liner Materials The selection of the material of construction is a function of the application, abrasivity of ore, size of mill, corrosion environment, size of balls, mill speed, etc. liner design and material of construction are integral and cannot be chosen in isolation. A list of the primary material of ...

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