strip ratio of iron ore mines

Stripping Ratios: What are They and Why are They

Oct 31, 2018  For example, an overburden thickness of 100 meters and an ore thickness of 50 meters would yield a strip ratio of 2:1. That means mining 1 cubic meter of ore would require mining 3 cubic meters of ...

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Stripping ratio - Wikipedia

In surface mining, stripping ratio or strip ratio refers to the amount of waste (or overburden) that must be removed to release a given ore quantity. It is a number or ratio that express how much waste is mined per unit of ore. The units of a stripping ratio can vary between mine types. For example, in coal mining the stripping ratio is commonly referred to as volume/weight. Whereas in metal mining, stripping ratio is unitless and is expressed as weight/weight. A stripping ratio can be expressed as a ratio or as a number.

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Razorback Iron Project Magnetite Mines

The strip ratio is the ratio of waste removed to ore recovered. Razorback Ridge is the most prominent outcrop of ironstone in The Braemar resulting in minimal to no overburden. The current mine plan has determined the stripping ratio to be just 1 : 0.24 for life of mine.

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(PDF) Stripping Ratios, Pit Limits Cutoff Grade ...

Optimal production scale of open pit mining operations with uncertain metal supply and long-term stockpiles. By Mohammad Asad. A review of cut-off grade policy models for open pit mining operations. By Iván Cárcamo. Optimum cut-off grade’s calculation in open pit mines with regard to reducing the undesirable environmental impacts.

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Stripping Ratio Mineral Production Activities ...

6. Stripping ratio . The main factor in designing a n open pit mine, which largely determines the cost of mining, is the stripping ratio.. Stripping is the removal of waste rock from above and around the orebody. Stripping ratio is defined as the tonnage of waste rock to be mined, divided by the tonnage of ore to be mined from the pit.

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pwc 2012 Americas School of Mines

Notes: Strip Ratio Mining Methods 27 Mistakes are often made when computing the strip ratio. It’s all in the words and you have to watch the flow of material and how it is classified. For example, according to Freeport McMoran’s 2007 10K filing, the concentrator is capable of processing 75,000 metric tons per day of primary sulfide ore and

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Mining of Iron Ores – IspatGuru

Mar 14, 2014  The stripping ratio describes the unit of overburden that must be removed for each unit of crude ore mined. A typical open pit iron ore mine is shown in Fig 1. Fig 1 A typical open pit iron ore mine. On the basis of mining methods, iron ore mining can be broadly divided into two categories namely manual mining and mechanized mining. Large iron ...

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(PPT) Calculating Stripping Ratios for Area Strip Mines ...

The Coal Area Strip Mine Formula • Strip Ratio = OB Thickness (in ft) * 11.11/ Coal thickness in inches – Assumes coal is 80 lbs/ft^3 (good for bituminous) – Area Strip Mine Geometry – Geologic Stripping Ratio – no accounting for rehandle or less than 100% coal recovery Your Turn • Use What You Have Learned About Calculating ...

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(PDF) Stripping Ratios, Pit Limits Cutoff Grade ...

Optimal production scale of open pit mining operations with uncertain metal supply and long-term stockpiles. By Mohammad Asad. A review of cut-off grade policy models for open pit mining operations. By Iván Cárcamo. Optimum cut-off grade’s calculation in open pit mines with regard to reducing the undesirable environmental impacts.

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Whats the average stripping ratio of open pit mines around ...

The stripping ratio in a mine is chosen based on economics. ... The two largest gold pits in Canada at the moment boast a similar waste/ore ratio of about 1.8 / 1. Cite. 28th Oct, 2018.

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Mining Weekly - Restructuring a must to sustain price ...

Smee explains that strip ratios refer to the ratio of the volume of overburden (or waste material) required to be handled to extract a volume of ore. Globally, iron-ore strip ratios are on average ...

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(PDF) Mining Methods: Part I-Surface mining

as iron ore, and surficial deposits ... ratio Large land area ... Strip mining is applicable to shallow, flatlying deposits [15].

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Karara Iron Ore Mine - Mining Technology Mining News and ...

The mine will have a 0.38:1 waste to ore stripping ratio. A trial mining project was carried out in December 2010 based on the Karara South and Karara East DSO deposits. The Karara East was bought into production in the same month. First shipment of hematite from the mine occurred in March 2011.

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ALABAMA MINE MAP REPOSITORY

was made into wrought iron and a few blooms were distributed to Jones Valley blacksmiths.On the spot from which he dug the ore Spaulding mine, owned by the Republic Iron and Steel Company, is now located (46). In the year 1827, the first coal mining in Walker

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Surface mining planning and design of open pit mining

vii) Stripping Ratio The ratio is most commonly expressed as: Strip Ratio (SR) is the mass of waste to be mined to obtain one unit mass of ore. Waste (tons) SR = ----- Ore (tons) For example, a 3:1 stripping ratio means that mining one cubic meter of ore will require mining three cubic meters of waste rock.

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Major Mines Projects FMG Mine

When mining commences in a new pit, the overburden is removed from the first two adjacent strip and placed just beyond the ore body limits close to the last strip to be mined in the sequence. Ore is then mined from the first strip. When the ore in the second strip is removed, removal of overburden from fourth strip commences and material is ...

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Stripping ratio mining Britannica

Other articles where Stripping ratio is discussed: coal mining: Choosing a mining method: calculated with the aid of stripping ratios, which represent the amount of waste material that must be removed to extract a given amount of coal. Stripping ratios can also consider the selling price of coal, and a certain minimum profit can be added to the total cost of producing and

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Iron ore - Wikipedia

There have also been iron ore mines in Utah and Alabama; however, the last iron ore mine in Utah shut down in 2014 and the last iron ore mine in Alabama shut down in 1975. Canada . In 2017 Canadian iron ore mines produced 49 million tons of iron ore in concentrate pellets and 13.6 million tons of

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Stripping Ratio Mineral Production Activities ...

6. Stripping ratio . The main factor in designing a n open pit mine, which largely determines the cost of mining, is the stripping ratio.. Stripping is the removal of waste rock from above and around the orebody. Stripping ratio is defined as the tonnage of waste rock to be mined, divided by the tonnage of ore to be mined from the pit.

More

(PDF) Stripping Ratios, Pit Limits Cutoff Grade ...

Optimal production scale of open pit mining operations with uncertain metal supply and long-term stockpiles. By Mohammad Asad. A review of cut-off grade policy models for open pit mining operations. By Iván Cárcamo. Optimum cut-off grade’s calculation in open pit mines with regard to reducing the undesirable environmental impacts.

More

pwc 2012 Americas School of Mines

Notes: Strip Ratio Mining Methods 27 Mistakes are often made when computing the strip ratio. It’s all in the words and you have to watch the flow of material and how it is classified. For example, according to Freeport McMoran’s 2007 10K filing, the concentrator is capable of processing 75,000 metric tons per day of primary sulfide ore and

More

Mining Weekly - Restructuring a must to sustain price ...

Smee explains that strip ratios refer to the ratio of the volume of overburden (or waste material) required to be handled to extract a volume of ore. Globally, iron-ore strip ratios are on average ...

More

Karara Iron Ore Mine - Mining Technology Mining News and ...

The mine will have a 0.38:1 waste to ore stripping ratio. A trial mining project was carried out in December 2010 based on the Karara South and Karara East DSO deposits. The Karara East was bought into production in the same month. First shipment of hematite from the mine occurred in March 2011.

More

(PDF) Mining Methods: Part I-Surface mining

as iron ore, and surficial deposits ... ratio Large land area ... Strip mining is applicable to shallow, flatlying deposits [15].

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TV:BIP Ratio Explained: The Economics of Oil Sands Mining ...

Mar 03, 2021  The strip ratio (SR) is the simplest measure of mining efficiency. Defined as the weight of overburden (or waste ore) divided by the weight of oil sands ore, a strip ratio of 2 is considered high but feasible if the ore grade is high enough. A better measure of mining economics is the TV:BIP ratio.

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Surface mining planning and design of open pit mining

vii) Stripping Ratio The ratio is most commonly expressed as: Strip Ratio (SR) is the mass of waste to be mined to obtain one unit mass of ore. Waste (tons) SR = ----- Ore (tons) For example, a 3:1 stripping ratio means that mining one cubic meter of ore will require mining three cubic meters of waste rock.

More

Major Mines Projects FMG Mine

When mining commences in a new pit, the overburden is removed from the first two adjacent strip and placed just beyond the ore body limits close to the last strip to be mined in the sequence. Ore is then mined from the first strip. When the ore in the second strip is removed, removal of overburden from fourth strip commences and material is ...

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Major Mines Projects South Flank Project

Mining at South Flank will be undertaken utilising conventional open-cut mining for iron ore. Campaign mining involves drilling, blasting, and categorisation of blasted material into iron ore or waste rock. Iron ore will be extracted from the three South Flank deposits - Highway, Vista Oriental and Grand Central.

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Pilbara - Rio Tinto

Our Pilbara operations – including a world-class, integrated network of 16 iron ore mines, four independent port terminals, a 1,700 kilometre rail network and related infrastructure – are designed to respond rapidly to changes in demand, supported by our Operations Centre in

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1.1 PHASES OF A MINING PROJECT

of overburden generated by mining is enormous. The ratio of the quantity of overburden to the quantity of mineral ore (called the ‘strip ratio’) is usually greater than one, and can be much higher. For example, if a proposed mining project involves the extraction of 100 million metric tons of mineral ore, then the proposed mining project

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Lecture 4 Calculating Stripping Ratios for Area Strip Mines

Calculating Stripping Ratios for Area Strip Mines. Mnge 315 Dr. B. C. Paul spring 2003 revised 2010 Note These notes contain information considered common knowledge to those familiar with Strip Mining. Books such as Elements of Practical Coal Mining and SMEs Surface Mining were specifically referenced Stripping Ratio as a Fundamental

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“This - Vale

• The iron ore business cash costs and expenses landed in China, adjusted for the sale of pellets, will come in below US$ 25/dmt in 2018 ... Average Strip Ratio Average Mine Haulage Distance Km, 2015 Ratio, 2015 3.1 5.9 3.9 Vale Peer1 Peer2 Peer3 64 60 60 58

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