dolomite dissolution in slag

(PDF) Dissolution Rate of Various Limes into Steelmaking Slag

Dissolution mechanisms of dolomite CaMg(CO3)2, and doloma CaO.MgO, in a model basic oxygen furnace (BOF) slag based on the CaO–MgO–SiO2–FeO–MnO system …

Dissolution of steel slags in aqueous media | SpringerLink

25-05-2017· Steel slag is a major industrial waste in steel industries, and its dissolution behavior in water needs to be characterized in the larger context of its potential use as an agent for sequestering CO 2.For this purpose, a small closed system batch reactor was used to conduct the dissolution of steel slags in an aqueous medium under various dissolution conditions.

Kinetics and Mechanisms of Dolime Dissolution in ...

The kinetics of dolime dissolution containing 20 and 50 pct of magnesium oxide in steelmaking slags has been studied in a high-temperature experiment. The dissolution tests were carried out under static conditions at temperatures of between 1573 K and 1873 K (1300 °C to 1600 °C). Cylindrical samples of dolime were introduced into pre-melted slag at predetermined time intervals.

Study on the dissolution of lime and dolomite in converter ...

Lime dissolution in stagnant slag was studied first and dissolution of lime, limestone and dolomite under forced convection were carried out by new experimental setup. Dissolution of different CaO samples into stagnant converter slags was carried out in a closed tube furnace at 1873K. In the case of CaO-'FeO'-SiO 2 slag, the dissolution of ...

[PDF] Dissolution of Magnesite and Dolomite in Simulated ...

Dolomite and magnesite are used as flux additions in EAF steelmaking for refining, refractory protection and developing a ing slag. For these materials to perform these functions they must be in solution in the slag. In this study the mechanism and rates of solution of dolomite and magnesite were determined for EAF slag compositions using several techniques including SEM analysis and ...

(PDF) KINETIC MODEL OF MAGNESIA BASED FLUX DISSOLUTION …

PDF | In basic oxygen furnace (BOF) steelmaking process, it is very important to understand the dissolution mechanism of magnesia based flux to improve... | Find, read and cite all the research ...

Study on lime dissolution in converter slag

The dissolution of lime and dolomite into different slag systems has been the topic of many researchers [1]-[9]. Russell [1] studied lime reactivity as well as dissolution rates and reported that the dissolution of lime could be determined at room temperature by ASTM water reactivity test.

Study on the dissolution of lime and dolomite in converter ...

Lime dissolution in stagnant slag was studied first and dissolution of lime, limestone and dolomite under forced convection were carried out by new experimental setup. Dissolution of different CaO samples into stagnant converter slags was carried out in a closed tube furnace at 1873K. In the case of CaO-'FeO'-SiO2 slag, the dissolution of ...

Kinetics and Mechanisms of Dolime Dissolution in ...

29-03-2019· Deng studied the dissolution behavior of lime and dolomite in the converter slag. It was concluded that a discontinuous dicalcium silicate layer and MgO·Fe 2 O 3 magnesioferrite particles were found on the surface of the dolomite sample and a (Mg, Fe)O phase inside the sample.

Dissolution mechanism of dolomite in converter slag at ...

The mechanism of dolomite dissolution in converter slag was studied and found to proceed by two steps: decomposition of dolomite into CaO and MgO and dissolution of the product into the slag. …

Study on the dissolution of lime and dolomite in converter ...

Decomposition and dissolution of limestone and dolomite in slag at 1873 K were studied. The decomposition was carried out both in argon and in slag under argon atmosphere. The decomposition process was simulated using Comsol. The results showed evidently that the decomposition of limestone and dolomite was controlled mostly by heat transfer.

dolomite dissolution in slag - mp-distribution.fr

THE EFFECT OF SLAG MODELING TO IMPROVE … The slag was then heated to 1550°C. the samples were first made from dolomite stone and then calcined at 1500°C prior this reasoning the rate of dissolution of dolomite will be the rate for dissolution of CaO or MgO. 25%FeO and 8. which was heated to about 1500°C. with the other component going into the slag where it dissolves …

Flow, dissolution, and precipitation in dolomite

dissolution of dolomite is a (slow) reaction rate limited process at room temperature [Lund et al., 1973]. The main aim of the current experimental research is to understand the evolution of hydraulic conductivity and flow patterns, caused by concurrent dissolution of dolomite and precipi-tation of calcium carbonate, in porous dolomite rocks. In

Dissolution of Dense Lime in Molten Slags under Static ...

Mechanisms of lime dissolution into slag under different conditions have been studied previously.1–9) Umakoshi et al.,2) studied the dissolution of a rotating burnt dolomite cylinder in Fe t O–CaO–SiO 2 slag as a func-tion of temperature (1350–1400°C) and rotational speed. They found a film of Ca 2 SiO 4 at a short distance from the

Mineral precipitation and dissolution at two slag-disposal ...

26-08-2003· Slag is a ubiquitous byproduct of the iron- and steel-refining industries. In northwestern Indiana and northeastern Illinois, slag has been deposited over more than 52 km2 of land surface. Despite the widespread use of slag for fill and construction purposes, little is known about its chemical effects on the environment. Two slag-disposal sites were examined in northwestern Indiana where slag ...

Dolomite Dissolution In Slag

Dolomite Dissolution In Slag Erox is a high-tech industry with a strong commitment to enhancing your productivity, helping reduce environmental impact. From making the optimal solution based on your requirements to providing one-on-one consultation, and providing process-engineered solutions, Erox provides 24 / 7 service, you will get the quickest response to any inquiry.

Dissolution mechanism of dolomite in converter slag at 1873K

Lime dissolution in stagnant slag was studied first and dissolution of lime, limestone and dolomite under forced convection were carried out by new experimental setup. Dissolution of different CaO samples into stagnant converter slags was carried out in a closed tube furnace at 1873K. In the case of CaO-'FeO'-SiO 2 slag, the dissolution of ...

Dissolution mechanism of dolomite in converter slag at ...

Dissolution mechanisms of dolomite CaMg(CO3)2, and doloma CaO.MgO, in a model basic oxygen furnace (BOF) slag based on the CaO–MgO–SiO2–FeO–MnO system …

Limestone Dissolution in Converter Slag at 1873 K (1600 ...

Lime dissolution in stagnant slag was studied first and dissolution of lime, limestone and dolomite under forced convection were carried out by new experimental setup. Dissolution of different CaO samples into stagnant converter slags was carried out in a closed tube furnace at 1873K. In the case of CaO-'FeO'-SiO 2 slag, the dissolution of ...

Static dissolution evaluation of dolomite-based materials ...

dissolution with missing time for concentration balancing. •The dissolution of soft-burned dolomite 1 was on a medium level, whereas the massive amount of FeO in trial with soft-burned dolomite 2 impeded a comparable evaluation of dissolution behaviour. •The hard-burned dolomite materials showed reduced MgO and CaO dissolution, which

additon of dolomite in slag - Ros Beyaert

additon of dolomite in slag Grinding Mill China. Dissolution of Magnesite and Dolomite in Simulated EAF Slags. particles of magnesite (6.06 g), dolomite (12.16 g) or magnesite (5.31 g) plus lime (7.28 g).

Dissolution mechanism of dolomite in converter slag at ...

Abstract The mechanism of dolomite dissolution in converter slag was studied and found to proceed by two steps: decomposition of dolomite into CaO and MgO and dissolution of the product into the slag. The first step was found to be controlled by heat transfer, which was confirmed by theoretical calculation. The decomposed dolomite had many pores, which allowed easy slag penetration.

Dissolution Rate of Burnt Dolomite in Molten Fe10-CaO-SiO2 ...

burnt dolomite in slag A. dissolution rate of Research Article (534) Transactions ISIJ, Vol. 24, 1984 ship between the decrease in radius and the immer-sion time is approximately linear though the linearity is worse than that for the dissolution of sintered CaO5 or MgO.6) The ...

Kinetics and Mechanisms of Dolime Dissolution in ...

Thus, the study of flux dissolution kinetics allows us to achieve effective slag formation with the desired composition and properties for better process control. When lime is charged to the converter its dissolution in the slag proceeds in three main stages[1]: ELIZAVETA CHEREMISINA is with the K1-Met , 4020 Linz, Austria.

Influence of dolomite on the properties and microstructure ...

01-10-2019· In this work, dolomite or a combination of dolomite and pulverized fly ash is to substitute up to 40% of blast-furnace slag in sodium hydroxide and sodium carbonate-activated slag systems. The influence of dolomite incorporation on the strength development, flowability, setting time, pore structure, hydrated phase assemblage, and microstructure of alkali-activated slag (AAS) are studied.

dolomite dissolution in slag

Flow, dissolution, and precipitation in dolomite. of lime dissolution into slag1-8. Umakoshi, Mori and Kawai9 studied the solution of a rotating burnt dolomite cylinder in Fe tO-CaO-SiO 2 slag as a function of temperature (1350ºC—1400ºC) and rotational speed.

An experimental study of dolomite dissolution rates as a ...

03-05-1999· Dolomite dissolution rates obtained in this study can be compared with those obtained in previous studies at 25°C in Fig. 7. It can be seen in this figure that there is a close correspondence between data obtained by the various studies. The reported pH bulk values of Lund et al. (1973)were used to compute corresponding pH surf values using Eq ...