الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Steel makers tend to replacement of scrap by DRI as iron source in steel making by
EAF due to scrap quality and availability.
The present research has been conducted to investigate effect of partial replacement of
scrap by DRI on steel making process parameters in EAF.
Investigate the effect of DRI on total ferrous oxide capacity of slag by
developing expressions for the total ferrous oxides capacity which show the
ability of the slag to absorb total ferrous oxides.
- The activity of total ferrous oxides in the slag was estimated by using the regular
ionic solution model.
- The activity coefficient of iron oxide in slag is investigated and equal to 0.0179.
- The activity of ferrous oxides in the slag varies linearly with the concentration.
- Calculated the solubility of oxygen in the steel and comparing the calculated
solubility with the relevant plant data to insure the reliability of applying the
developed equations to the purpose at hand.
- The activity of carbon and oxygen in steel calculated to investigate its effect on
oxides capacity.
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- The activity coefficient of oxygen and carbon in steel is equal to 0.801and 1.074
respectively.
- The effect of thermal conditions of the furnace on ferrous oxides capacity is large,
Whereas the influence of slag basicity is small.
Adaptation and improvement of an already established thermodynamic program
(Gibbs program) by simulation the EAF processes according to regular ionic
solution model under certain conditions.
- Predict amount of carbon addition for certain injected oxygen with different DRI
carbon content.
- The steel carbon concentration increases hardly with increase carbon addition
especially at 3000 kg/heat and more at DRI carbon content equal to 2.2%.
- Optimum range of (FeO) founded from 22- 25% to achieve the carbon content in
metal 0.04%, it occurs at 1600 kg carbon addition in EAF.
Assessing the effect of using DRI in metallic charge with different proportional
on furnace process parameters where EAF DRI use was predicated for
production of high quality.
- Current study investigates the effect of DRI on EAF main technological process
parameters including electric power, other consumptions, residual elements, steel nitrogen content and process yield.