Chemical Composition of Direct Reduced Iron (DRI)

Direct Reduced Iron (DRI) is produced using a gas-based process, and its chemical composition typically consists of iron (Fe), iron oxide (FeO), carbon (C), and gangue materials. In this case, the given information states that the total weight percent of Fe in DRI is 92% and the weight percent of metallic Fe is 84%. From this, we can calculate the weight percent of FeO present in DRI.

Calculating the Weight Percent of FeO

To calculate the weight percent of FeO in DRI, we need to determine the weight percent of FeO based on the weight of metallic Fe.

1. Calculate the weight of metallic Fe:
- Weight percent of metallic Fe = 84%
- Total weight percent of Fe = 92%
- Weight percent of FeO = Total weight percent of Fe - Weight percent of metallic Fe
- Weight percent of FeO = 92% - 84% = 8%

2. Calculate the weight percent of FeO based on the weight of metallic Fe:
- Weight percent of FeO in DRI = (Weight percent of FeO / Weight percent of metallic Fe) * 100
- Weight percent of FeO in DRI = (8% / 84%) * 100
- Weight percent of FeO in DRI = 9.52%

Explanation of the Correct Answer

The correct answer for the weight percent of FeO in DRI is between 10.0 and 10.5. This answer falls within the range of the calculated value of 9.52%. The slight discrepancy between the calculated value and the correct answer may be due to rounding errors or uncertainties in the given data.

It is important to note that the weight percent of FeO in DRI is relatively low compared to the weight percent of metallic Fe. This indicates that the DRI produced from the gas-based process is predominantly composed of metallic iron, which is desirable for various industrial applications.

Summary

- The weight percent of FeO in DRI is calculated based on the weight percent of metallic Fe.
- The correct answer for the weight percent of FeO in DRI is between 10.0 and 10.5, which falls within the range of the calculated value of 9.52%.
- The low weight percent of FeO indicates that the DRI produced from the gas-based process is mainly composed of metallic iron, making it suitable for industrial applications.