Estimate the total surface area of char

Assignment Help Chemical Engineering
Reference no: EM1388824

In the direct steelmaking reactor based on the reduction of an oxidizing foaming slag by char (carbon) particles and droplets of iron containing 2% carbon, it is postulated that the rate controlling step governing the reduction of FeO within the slag is the transfer of CO and CO2 across gas halos surrounding the iron droplets and char particles. In 4/S/ plant trials, the smelting rate of iron was observed to be 4 tonnes./hr of Fe. for a slag FeO content of 6 wr%, and a slag weight of 40 tonnes. Estimate the total surface area of char and iron droplets needed to achieve the smelting rates observed. Assuming the average char and droplet diameters to be 1 cm, estimate the volumetric loading (i.e. volume percentage) of droplets and char corresponding to these smelting conditions. State any assumptions you sec fit.


Atomic weight of Fe                                                                56 g/mol

Gas constant, R                                                                   : 8.314 J/mol.K

Temperature of Foaming Slag                                                 : 1600°C

Volume %CO2 in gas phase halos at slag interfaces                 : 6%

Gas pressure within halos                                                      : 1.2 mm

Gaseous Diffusion Coefficients (Da, = Day )                             : 1.0x to") m2/s

Density of molten slag                                                           3300 kg/m3

267_Estimate the volumetric loading of droplets.png

Reference no: EM1388824


Write a Review


Chemical Engineering Questions & Answers

  Adsorption and membrane processes

Adsorption and Membrane Processes

  Evaluation of a new chemical manufacturing process

Prepare the design and evaluation of a new chemical manufacturing process.

  Derive the simultaneous linear mass balance equations

ECH 3023: Mass Balance around two distillation Columns Using Excel, Derive the simultaneous linear mass balance equations for the system using all the information  provided.

  Calculate the energy required

Calculate the energy required to heat 1kg of CO 2  from 400ºC to 600ºC at a constant pressure of 1atm using:-

  Design variables necessary for sizing equipment

Assist with the setting of design variables necessary for sizing equipment

  Explain what is meant by the term threshold limit values

Explain what is meant by the term Threshold Limit Values (TLVs). Describe briefly the different TLVs used by Industrial Hygienists. Outline the strengths and weaknesses of these occupational exposure limits and illustrate how they may best be u..

  Solve the initial value problem

Use Laplace transformation to solve the initial value problem

  Biochemical oxygen demand

Chemical Oxygen Demand (COD,  microbiological quality of drinking waters, Oxygen Sag curves, landfill gas, integrated hazardous waste management plan

  Transmission electron microscopy

Discuss how transmission electron microscopy (TEM) can provide information complementary to that which can be obtained from standard X-ray or neutron diffraction methods, giving suitable examples.

  Why a substance heated at a fast rate

Why a substance is being heated at a fast rate the temperature of decomposition

  Evaluate particle diameter at different gas velocities

Evaluate particle diameter at different terminal gas velocities

  Evaluate the work done by the gas

The atmospheric pressure of 100k Pa acts on the other side of the piston. The gas is heated until the volume is doubled and the final pressure is 500 kPa. Calculate the work done by the gas.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd