Investigation Of Ductile Iron Dephosphorization

The product of austempering reaction in ductile iron is often referred to as ausferrite rather than bainite[1]. The high silicon content of the ductile iron suppresses the precipitation of carbide during austempering reaction and retains substantial amount of stable high carbon austenite ( …

For the dephosphorization of a liquid iron solution containing chromium, the slag should exhibit good ... INVESTIGATION METHODS The experimental heats were run in an induction

It was shown that the variables with the greatest impact on the dephosphorization process include chromium and nickel levels, temperature, and slag basicity. A statistical …

The dephosphorization treatment of the pre-reduced iron ore by mechanical crushing and screening methods was evaluated as a function of the initial reduction condition, screen size, and the ...

The dephosphorization treatment of the pre-reduced iron ore by me-chanical crushing and screening methods was evaluated as a function of the initial reduction condition, screen size, …

Phosphorus in the charge could be at higher than usual levels for DRI, HBI, pig iron, and hot metal, depending on the iron ore source. Some steels require particularly low P levels to avoid …

As shown in Figure 1, the P content of the final iron sample decreased rapidly within 600 s and was almost constant after 600–1,800 s of dephosphorization.The basicity of the slag affected the P content of the final iron sample, L P, and k P, and the P content decreased to 0.20%.The value of L P was in the range of 12.24–23.11, and the value of k P ranged from 1.141 × 10 −3 to …

Investigation into the dephosphoriz ation of ferromanganese alloys. ... systems applied in dephosphorization of iron. FactSage calculations. FactSage™ version 7.3 was utilized. The package is a ...

It has been a challenging mission to assure that ductile iron castings meet customer internal soundness specifications with acceptable process capabilities to get approval in new automotive model launch processes. Shrinkage conditions were investigated in the new program launch stage. Several factors were investigated including carbon equivalent, carbon levels, …

Dissolving time of Mg particles in hot metal (5) The solubility of Mg in liquid iron is determined by hot metal temperature and Mg vapor pressure as follows [7]: lg[Mg] 7000/T lg PMg 5.1 (6) where T is the absolute temperature, K; PMg the vapor pressure of the temperature. The solubility of Mg in liquid iron increases with the increase in pressure.

Figure 1: Y–block mould for the Ductile Iron Melts. Figure 2a: Microstructure of the Ductile. Figure 2b: Microstructure of the Cast Iron (X 200) Austempered Ductile Iron (X 400). Figure 3a: Stress Strain Curve for DCI. Figure 3b: Stress Strain Curve for ADI. Carbon Sulphur Phosphorus Manganese 0.05 Max 0.03 Max 0.03 0.3

The work in this study is focused on investigation of the tribological behavior of ductile cast iron with nanosized particles: titanium nitride TiN; titanium nitride 30% + titanium carbonitride 70 ...

During the direct reduction of HPOH to produce direct reduced iron (DRI) and achieve simultaneous dephosphorization, sodium or calcium salts are typically added as …

The effect of CaCO 3, Na 2 CO 3, and CaF 2 on the reduction roasting and magnetic separation of high-phosphorus iron ore containing phosphorus in the form of Fe 3 PO 7 and apatite was investigated. The results revealed that Na 2 CO 3 had the most significant effect on iron recovery and dephosphorization, followed by CaCO 3, the effect of CaF 2 was …

Deep dephosphorization of high‑phosphorus oolitic iron ore (HPOIO) is extremely difficult because of its refractory characteristics. A new approach for simultaneous iron recovery and dephosphorization from HPOIO by oxidation roasting – gas-based reduction (ORGR) and magnetic separation process was developed. The underlying mechanism was investigated …

The study involved conducting preliminary thermochemical FactSage calculations followed by experimental laboratory tests to investigate the dephosphorization of South African FeMn alloys by different synthetic CaO-based slag systems, similar to the systems applied in dephosphorization of iron.

The most up-to-date trends in stainless steel production—aiming at the reduction of production costs—consist of the substitution of steel scrap by hot metal, coming from the reduction of iron-chromium ores. This process requires a more extensive dephosphorization. The dephosphorization process, when applied to chromium steels, requires slag with high …

content, which plays a major role in dephosphorization, viz., a decrease in the activity of CaO. An appropriate Fe tO content in CaO-based slag is therefore important for dephosphorization. Unfortunately, research on phosphorus behavior in an EAF process involving DRI is lacking because a high phosphorus content in DRI makes dephosphorization ...

Investigation of Dephosphorization Reaction by Injecting Lime-Based Fluxes and Iron Oxides Into Hot Metal in Torpedo Ladle Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan - Japan doi 10.2355/tetsutohagane1955.69.15_1818

The main objective of this research was to investigate the behavior Of phosphorus in the solid state carbothermic reduction process and to develop a dephosphorization pre-treatment …

In the dephosphorization process of hot metal with the NDSP, the mineralogical structure and viscosity of dephos- phorization slag play an important role in dephosphorization capacity. In …

5 Overview • Chemical analysis to determine the composition of Ionic liquid-sourced iron (IL-Fe) • Ductile iron ingot cast using commercial materials with a composition simulating the use of IL-Fe – Carbon (C) sourced from Bosch reactor at MSFC – Cast material referred to as Sim-IL ductile iron (DI) • Produced ingot compared to commercially available ductile iron

The fatigue behavior of gray iron, compacted graphite iron, and ductile iron was investigated. Fatigue lives ranged from 10**2 to 10**6 cycles. Fatigue tests were conducted in both stress and ...

The optimal parameters are found for the iron recovery and dephosphorization, which are the reduction temperature of 1100 °C, reduction time of 60 min, a CO flow rate of 2.8 L/min and N 2 flow rate of 1.2 L/min. The TFe and P contents of the obtained reduced iron are 92.31% and 0.10%, respectively, and the iron recovery is as high as 92.65%.

after dephosphorization can be smoothly carried out. The high basicity of slag is beneficial to dephosphorization but is deleterious to deslagging, while the high temperature is conducive to deslagging but is harmful for the dephos-phorization. Therefore, in the present paper, the optimum dephosphorization temperature under about the same basic-

Request PDF | Development and investigation of austempered ductile iron (ADI) for thick-walled gear components | Talking about the design of modern high-performance power train applications, one ...

Calcium carbonate, renowned for its affordability and potent dephosphorization capabilities, finds widespread use as a dephosphorization agent in the direct reduction roasting of high-phosphorus oolitic hematite (HPOIO). However, its precise impact on iron recovery and the dephosphorization of iron minerals with phosphorus within HPOIO, particularly the mineral …

coming from the reduction of iron-chromium ores, which requires more extensive dephosphorization. For the dephosphorization of a liquid iron solution containing chromium, the slag should exhibit good dephosphorizing properties, as either chromium or chromium oxides, which enter the slag during the refining process and decrease the ...

Ductile Iron Melting and Base Chemistry Control Ductile iron returns, scrap steel and pig iron are combined in a recipe to a desired weight and moved to a preheater. Metallics are preheated to roughly 1000 F and then trans-ferred to a heel melt coreless induction furnace. Metallics are trimmed with carbon and silicon then melted and

The above dephosphorization method has achieved acceptable dephosphorization effect, but due to the constraints of environment, production cost and efficiency, mainstream configuration of iron and ...