Self Assesment : Imporatant ores of Iron, copper, Zince and Mercury, and metallergical operations

Self Assessment Exercise

1. List important ores of iron, copper, zinc and mercury

2. List out basic metallurgical operations.

3. List main processes used to concentrate the ore.

4. Write names of methods used in the extraction of a metal from its concentrated ores.

5. List methods used to purify metals.

Answer.

Iron ores

a. Haematite (Fe2O3)

b. Magnesite (Fe3O4)

Copper ores

Chalcopyrite (CuFeS2)

Zinc ore

Zinc blend (ZnS)

Murcury ore

Cinnabar (HgS)

2. Basic metallurgical operations

i. Crushing, grinding or pulverizing of the ore

ii. Concentration of the ore

iii. Extraction of metals

iv. Refining of metals

3. Main process in used in concentration of ores

i. Magnetic separation

ii. Cyclone separation

iii. Floatation process

4. Names of methods used in the extraction of a metal from its concentrated ores

i. Roasting

ii. Smelting

a. Roasting ore with coke and sand

b. Bessemerization

iii. Refining or purification of metals

a. Electro-refining b. Distillation

5. Methods used to purify metals

a. Electro-refining

b. Distillation

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