MINING MAGNESIUMMINING MAGNESIUM

BY: SAI K, STEVE F

MINING MAGNESIUMMINING MAGNESIUM

1. PROSPECTING

-the act of the searching for minerals or ore deposits

-already have located the source of the element

-redundant

-usually the first step

2. EXPLORE

-discover the extent of magnesium and obviously the value of it

-crucial

A.indicate the amount of money we will have to spend

B. whether the amount of magnesium is worth that much

-think about whether we can mine the magnesium without disrupting the environment

MINING MAGNESIUMMINING MAGNESIUM

3. FEASIBILITY STUDY

-take in all the factors that help or disrupt the mining

-decide whether we should actually mine the magnesium

4. DEVELOP

-allows us to easily access the magnesium in the most convenient fashion

-in such a way that we don’t harm too much of the environment

MINING MAGNESIUMMINING MAGNESIUM

5. EXTRACTION

-large scale

A.get as much as we can

B.get the job done quickly

6. RECLAMATION

-make the land back to the way it was

-used for other things

TYPES OF MININGTYPES OF MINING

- SURFACE MINING

1. Extraction of minerals close to the surface

2. Examples

A. Open-Pit Mining

B. Quarrying

C. Strip Mining

D. Placer Mining

E. Mountaintop Removal

TYPES OF MININGTYPES OF MINING

- SUB-SURFACE MINING

1. Underground Mining

2. Extraction of minerals inside the Earth

3.Examples

A. Drift Mining

B. Shaft Mining

C. Slope Mining

D. Hard Rock Mining

E. Borehole Mining

PROCESSING MAGNESIUMPROCESSING MAGNESIUM

CHEMICAL EQUATIONS INVOLVED IN PROCESSING MAGNESIUM:

MgCO3(s) --heat-->MgO(s) + CO2(g)

1.The chemical reaction to get magnesium when magnesium carbonate decomposes at around 700ºC -1000º C to produce magnesium oxide and carbonate.

CaMg(CO3)2(s)--heat--> (CaO·MgO)(s) + 2CO2 (g)

2. The chemical reaction to get magnesium when dolomite limestone is heated to drive off the carbon dioxide and leave calcined dolime.

2Mg(OH)2(s) --heat--> 2MgO(s) + 2H2O(g)

3.The chemical reaction to get magnesium when magnesium hydroxide is heated to produce magnesium oxide and water vapor.

SEVEN MSDSSEVEN MSDS

1. http://www.luminet.net/~wenonah/hydro/safety/mgco3.doc (MgCO3)

2. http://www.amerex-fire.com/MSDS/co2.pdf (CO2)

3. http://www.jtbaker.com/msds/englishhtml/m0182.htm (MgO)

4. http://www.jm.com/msds/EN3003.pdf ( CaMg(CO3)2 )

5. http://www.graymont.com/msds/MSDS-Dolomitic_Quicklime_May_2005.PDF (CaO·MgO)

6. http://sargentwelch.com/pdf/msds/sch94175.pdf (2Mg(OH)2)

7. http://www.jtbaker.com/msds/englishhtml/c0357.htm (CaCl2)

EFFECTS OF MINING ON THE EFFECTS OF MINING ON THE ENVIRONMENTENVIRONMENT

- Water quality

1. Possible change in Coloring

2. pH change

3. Destruction of aquatic plants

- Therefore destructive impact on aquatic life

1. pH change causes fishes to die (lack of

vegetation)

EFFECTS OF MINING ON THE EFFECTS OF MINING ON THE ENVIRONMENTENVIRONMENT

2. Causes usually harmless aquatic life forms to start

attacking the fish (because they don’t have any food)

- Air pollution

1. Causes health hazards (usually involving the lungs)

2. Release of substances such as nitrogen oxides, sulfur dioxides, and other substances

EFFECTS OF MINING ON THE EFFECTS OF MINING ON THE ENVIRONMENTENVIRONMENT

- Noise pollution

1. Causes annoyance

2. Harm to hearing