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EXPERIMENT TITLE: Partial Oxidative Roasting of Hematite AIM: To determine the the effect of partial oxidative roasting on percentage composition of haematite ( Fe 2

EXPERIMENT TITLE: Partial Oxidative Roasting of Hematite
AIM: To determine the the effect of partial oxidative roasting on percentage composition of haematite (Fe2O3)
OBJECTIVES:
To study the decomposition kinetics of hematite (Fe2O3) during partial roasting through quantification of weight loss at increasing temperatures over time.
Determining the optimal roasting temperature
Investigating the effect of temperature on roasting
Evaluate the efficiency of the roasting process
Analyzing the properties of the roasted sample
THEORY:
Partial oxidative roasting is a metallurgical process that involves heating a sulfide ore in the presence of air at high temperatures. The objective of this process is to convert the sulfide ore into its oxide form, which can then be further processed to extract the desired metal.
During partial oxidative roasting, the sulfide ore undergoes a chemical reaction with oxygen from the air. This reaction results in the conversion of the sulfide minerals into their corresponding oxide minerals. The oxygen from the air combines with the sulfur in the sulfide ore to form sulfur dioxide (SO2) gas, which is released. At the same time, the metal component of the sulfide ore is oxidized to its oxide form.
The specific objectives of partial oxidative roasting can vary depending on the context and the desired outcome of the study. Some common objectives include:
Conversion of sulfide minerals to oxide minerals: The primary objective is to convert the sulfide minerals present in the ore into their corresponding oxide minerals. This conversion is important because oxide minerals are often more amenable to subsequent processing steps for metal extraction.
Enhancement of metal recovery: Partial oxidative roasting can improve the recovery of metals from the ore. By converting the sulfide minerals to oxide form, the subsequent extraction processes can be more efficient and effective in recovering the desired metal.
Reduction of impurities: The roasting process can also help in reducing impurities present in the ore. Some impurities may be volatile and can be removed as gases during the roasting process. This can result in a purer final product.
Optimization of process variables: Another objective of partial oxidative roasting experiments is to investigate the effects of various process variables such as temperature, time, and gas composition on the roasting efficiency and the quality of the final product. By studying the influence of these variables, researchers can optimize the roasting conditions to achieve the desired outcomes.
APPARATUS :
Muffle furnace
Zirconium crucible
Mass balance
Pulverizer
75 micron sieve
Spatula
Tong
Heat resistant suit
PROCEDURE:
1.Perform an elemental analysis on your ore sample using XRF machine
2.Crush and grind your sample to 80% passing 75 microns
3. Weigh 5g of ground hematite ore sample into a zirconium crucible.
4. Place the crucible into a muffle furnace heated to 800\deg C
5.Periodically open the furnace door to allow air into the furnace to facilitate the oxidation
6. Use a stopwatch to set a timer for 5 minutes
7. Remove the crucible after the 5 minutes have lapsed
8.Allow the crucible to cool
9.Weigh the sample using a mass balance
10. Repeat the procedure varying the time from 10 minutes to 15,with a 5 minute increase in time till there is no change in weight of the sample with an increase in temperature
11.Prepare a sample of the roasted ore for elemental analysis by an XRF machine
SPECIMEN DETAILS BEFORE ROASTING
ID Group 1
App. QuantExpress\Oxides
Type Routine measurement
Priority Priority: Normal
Start 3/25/202410:29:01 AM
End 3/25/202410:35:31 AM
Completed in 0:06:30
Material Oxides
Mode Vac
Diameter 34mm
Method Full Analysis-Vac34mm
SiO240.8%
Fe2O38.96%
Al2O310.3%
SO30.165%
Bi2O30.112%
K2O 2.62%
MnO 0.159%
Na2O 0.389%
TiO20.385%
MgO 0.114%
P2O5430PPM
ZrO2187PPM
ZnO 106PPM
SrO 86.5 PPM
CaO 538 PPM
MoO3439 PPM
Cr2O3253 PPM
CuO 101PPM
Fig 1.0 :sample ore before roasting
Fig 2.0 :Sample ore after roasting
SPECIMEN DETAILS AFTER ROASTING
ID Group 1
App. QuantExpress\Oxides
Type Routine measurement
Priority Priority: Normal
Start 3/25/202410:29:01 AM
End 3/25/202410:35:31 AM
Completed in 0:06:30
Material Oxides
Mode Vac
Diameter 34mm
Method Full Analysis-Vac34mm
SiO253.2%
Fe2O37.44%
Al2O30.271%
SO30.165%
Bi2O30.112%
K2O 943 PPM
Cr2O3509 PPM
MoO3439 PPM
CaO 1 PPM
CuO 101 PPM
MnO 61.8 PPM
What conclusion can be given to this experiment ?

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