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Dolomite – Its Processing and Application in Iron

During the production of iron by blast furnace (BF) route, dolomite is added either in the process of sintering or as a direct feed in the blast furnace. Raw dolomite is normally used for this addition. Dolomite addition is made during ironmaking for obtaining desired percentage of MgO in the BF slag.

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

`FeO´ come into the slag by oxidation, and CaO in the slag is due to the addition of different fluxes. In industry, lime and doloma are very important slag additives in primary steel making process. The dissolution of lime (or limestone) and doloma (or dolomite) into different slag systems has been the topic of many researchers [1]-[18]

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Limestone and Dolomite and their Use in Iron and

This limestone or dolomite is first decomposed into CaO or CaO + MgO which then combine with gangue to form slag. Further lime from limestone reacts with the S present in the raw materials to form calcium sulphide (CaS) which goes into slag.

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Slag foaming by carbonates addition: studies of enthalpy ...

energy effect of both limestone and dolomite addition. The results showed that during liquid bath, when slag foaming is possible and temperature is relatively high, the addition of Ca and Mg carbonates demands only 60-70% of the theoretical decomposition energy while the addition during scrap melting required almost full amount of energy. The

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METALLURGICAL USES FLUXES FOR METALLURGY

Limestone and dolomite are used in smelting iron ores specif- ically to supply lime (CaO) and magnesia (MgO) to form a slag with the acid components, particularly silica (SiO,) and alumina (A1,0,). Typical chemical analyses for limestone, dolomite, and their respective calcined products are shown in Table 4.

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Dolomite Dissolution In Slag - haagdeko.de

Predictions for dolomite dissolution as a function of var- addition rates of limeous addition rates of dolomite1, respectively2 the flow rate of stirring gas has a crucial impact on in lime and dolomite dissolution, an increase in lime and the rate of dissolution of flux additions. Read More; Dissolution Rate Of Various Limes Into Steelmaking

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Application Of Dolomite In Refractory Industry

Dolomite bricks are made of dolomite sand that is calcined from natural dolomite. Dolomite brick contains w (CaO) ≥ 40%, w (MgO) ≥ 35%, and also contains a small amount of SiO2, Al2O3, Fe2O3 and other impurities. If the mass ratio of CaO to MgO in the brick is less than 1.39, it is called magnesia dolomite

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Olivine as slag conditioner in ironmaking, and its

During 1980-85 many of the European iron producers replaced dolomite as slag conditioner with olivine due to the positive effects of olivine, especially in the sinter.

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JST

ISIJ International, Vol. 30 (1990). No. 5, pp. 362 371 Simultaneous Injection of Pulverized Coal and Dolomite into Blast Furnace Tuyeres ChisatO YAMAGATA,1)YOShimasaKAJIWARA1) Shl

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Global Dolomite Market (2020 to 2027) - Size,

16-10-2020  The "Dolomite Market Size, Share Trends Analysis Report by End-use (Construction, Iron Steel), by Product (Agglomerates, Calcined, Sintered), by Region, and Segment Forecasts, 2020 - 2027" report has been added to ResearchAndMarkets's offering.. The global dolomite market size is anticipated to reach USD 3.0 billion by 2027, expanding at a CAGR of 3.8% from 2020 to 2027.

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Engineering and durability properties of

The addition of dolomite to a slag-based geopolymer matrix can improve its engineering properties and reduce disposal problems. This paper discusses the effect of alkali solution concentration, curing temperature and different proportions of slag and dolomite on the strength of geopolymer mortars.

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Study on the Recycling of Hot Decarburization Slag in ...

and 1.58 t per heat of light-burned dolomite were added in De-P converter. While the amount of lime and light burned dolomite reduced by 2.75 t and 0.03 t for each heat when the returned slag was used in De-P converter. More than half of the test heats achieved zero consumption of lime and light burned dolomite. Industrial Test

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Recycling practices of crushed MgO-C bricks and dolomite ...

the slag can be either by pure dolomite additions to the slag, waste MgO-C refractories addition to the slag, or from the working face of the refractory lining dissolving into the slag. In this context, two source of MgO available to the refractory industry were selected: 1) MgO-C spent refractory; 2) Dolomite sinter or Dead-burned dolomite fines.

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Study on the dissolution of lime and dolomite in

While addition of small amounts of dolomite directly into the slag could be considered in steelmaking converter, too much would result in slow dissolution and waste of the raw materials. Keywords Converter slag, Decomposition, Dissolution, Dolomite National Category

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Dolomite Dissolution In Slag - haagdeko.de

Predictions for dolomite dissolution as a function of var- addition rates of limeous addition rates of dolomite1, respectively2 the flow rate of stirring gas has a crucial impact on in lime and dolomite dissolution, an increase in lime and the rate of dissolution of flux additions. Read More; Dissolution Rate Of Various Limes Into Steelmaking

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Global Dolomite Market (2020 to 2027) - Size,

The key application of dolomite is as a refractory and then as a flux in the steel iron industry. In the calcined form, it is used as a steelmaking slag flux, where in addition to increasing slag fluidity the magnesia content of the product helps protect and improve the

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Smelting reduction of MgO in molten slag by liquid ...

reduction of MgO in molten slag by liquid fer-rosilicon was investigated at high temperature. Effects of reaction temperature, addition of CaF 2, primary slag composition and MgO/Si molar ratio were discussed. 2. MATERIALS AND METHODS Calcined dolomite (CaOMgO) powder supplied by the Chongqing Haibo magnesium smelting Co.,

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Olivine as slag conditioner in ironmaking, and its

During 1980-85 many of the European iron producers replaced dolomite as slag conditioner with olivine due to the positive effects of olivine, especially in the sinter.

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Application Of Dolomite In Refractory Industry

Dolomite bricks are made of dolomite sand that is calcined from natural dolomite. Dolomite brick contains w (CaO) ≥ 40%, w (MgO) ≥ 35%, and also contains a small amount of SiO2, Al2O3, Fe2O3 and other impurities. If the mass ratio of CaO to MgO in the brick is less than 1.39, it

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JST

ISIJ International, Vol. 30 (1990). No. 5, pp. 362 371 Simultaneous Injection of Pulverized Coal and Dolomite into Blast Furnace Tuyeres ChisatO YAMAGATA,1)YOShimasaKAJIWARA1) Shl

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Engineering and durability properties of

The addition of dolomite to a slag-based geopolymer matrix can improve its engineering properties and reduce disposal problems. This paper discusses the effect of alkali solution concentration, curing temperature and different proportions of slag and dolomite on the strength of geopolymer mortars.

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Recycling practices of crushed MgO-C bricks and dolomite ...

the slag can be either by pure dolomite additions to the slag, waste MgO-C refractories addition to the slag, or from the working face of the refractory lining dissolving into the slag. In this context, two source of MgO available to the refractory industry were selected: 1) MgO-C spent refractory; 2) Dolomite sinter or Dead-burned dolomite fines.

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Study on the dissolution of lime and dolomite in

While addition of small amounts of dolomite directly into the slag could be considered in steelmaking converter, too much would result in slow dissolution and waste of the raw materials. Keywords Converter slag, Decomposition, Dissolution, Dolomite National Category

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Study on the Recycling of Hot Decarburization Slag in ...

and 1.58 t per heat of light-burned dolomite were added in De-P converter. While the amount of lime and light burned dolomite reduced by 2.75 t and 0.03 t for each heat when the returned slag was used in De-P converter. More than half of the test heats achieved zero consumption of

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Slag Conditioner Eryas Mining olivine sand,

Less raw material need since Olivine contains high MgO according to both serpentine and dolomite. Less slag is obtained by using olivine 75% of time passes in sinter temperature is used for evaporating CO2 when dolomite is used in sinter. Whereas this time becomes 15%

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Global Dolomite Market (2020 to 2027) - Size,

The key application of dolomite is as a refractory and then as a flux in the steel iron industry. In the calcined form, it is used as a steelmaking slag flux, where in addition to increasing slag...

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Improved Slag Formation in the Blast Furnace by Co ...

were considered to be burnt lime, burnt dolomite or BOF slag. Limestone or dolomite have a strong cooling effect on the raceway flame temperature, which would limit the injection rate of pulverized coal too much. The effect on tuyere slag formation from addition of burnt lime, burnt dolomite and BOF-slag was studied, by using a high temperature

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Smelting reduction of MgO in molten slag by liquid ...

in order to forming molten slag at 1500~1600 °C, the composition of primary slag was about 55% cal-cined dolomite (32.0% CaO and 23.0% MgO) and 45% additive (Al 2O 3 and SiO 2). So the primary slag composition and the relevant experimental condi-tions were list in Table 1. After reduction, the res-idue slag in graphite crucible was cooled to room

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using dolomite in making slag of ladle furnace -

Steel Slag – Material Description – Recycled Materials Resource . Steel slag, a by-product of steel making, the liquid furnace slag and ladle slags are generally processed to * Hardness of dolomite measured on same »More detailed

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JST

ISIJ International, Vol. 30 (1990). No. 5, pp. 362 371 Simultaneous Injection of Pulverized Coal and Dolomite into Blast Furnace Tuyeres ChisatO YAMAGATA,1)YOShimasaKAJIWARA1) Shl

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Recycling practices of crushed MgO-C bricks and dolomite ...

the slag can be either by pure dolomite additions to the slag, waste MgO-C refractories addition to the slag, or from the working face of the refractory lining dissolving into the slag. In this context, two source of MgO available to the refractory industry were selected: 1) MgO-C spent refractory; 2) Dolomite sinter or Dead-burned dolomite fines.

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Application of Dolomite in Refractories Industry

In addition, the gunning material developed by dolomite is used for the repair of converters, electric furnaces, ladle slag lines, RH insertion pipes and other parts, with good effects; it can also produce tundish coating materials and dry materials with excellent performance. New Refractory Materials

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Mineral Planning Factsheet Dolomite

dolomite for specific uses and the market con-tinues to evolve. The principal uses of dolomite are those that utilise the mineral in the calcined form (dolomitic lime). The most important of these is as a steelmaking slag flux, where the dolomitic lime replaces some of the quicklime (CaO) used in slag production. In addition to increasing slag

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Dissolution mechanism of dolomite in converter

(2014). Dissolution mechanism of dolomite in converter slag at 1873 K. Ironmaking Steelmaking: Vol. 41, No. 1, pp. 75-80.

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Study on the Recycling of Hot Decarburization Slag in ...

and 1.58 t per heat of light-burned dolomite were added in De-P converter. While the amount of lime and light burned dolomite reduced by 2.75 t and 0.03 t for each heat when the returned slag was used in De-P converter. More than half of the test heats achieved zero consumption of

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Effect of MgO and Al2O3 variations in oxygen steelmaking ...

raw dolomite has been added during the second part of the blow. Data set-3 (112 heats) contains those heats in which raw dolomite has been added but ore has not been added during the second part of the blow. Average analysis of slag is: 56 per cent CaO, 17 per cent SiO 2, 1.2 per cent P 2O 5, 3 per cent MnO, 3.5 per cent (max) MgO and 20 per cent FeO.

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Slag Conditioner Eryas Mining olivine sand,

Less raw material need since Olivine contains high MgO according to both serpentine and dolomite. Less slag is obtained by using olivine 75% of time passes in sinter temperature is used for evaporating CO2 when dolomite is used in sinter. Whereas this time becomes 15% shorter since it

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Smelting reduction of MgO in molten slag by liquid ...

in order to forming molten slag at 1500~1600 °C, the composition of primary slag was about 55% cal-cined dolomite (32.0% CaO and 23.0% MgO) and 45% additive (Al 2O 3 and SiO 2). So the primary slag composition and the relevant experimental condi-tions were list in Table 1. After reduction, the res-idue slag in graphite crucible was cooled to room

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Start-up slags for producing magnesium from dolomite ore ...

dolomite ore in a Magnethermic reactor by I.M. Morsi*, and H.H. Ali* Synopsis The present study investigates the feasibility of using some materials as start-up slags for the extraction of magnesium metal from Egyptian dolomite ores by the Magnethermic technique. The reduction of roasted dolomite (dolime) takes place in a closed

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STUDY ON THE RECYCLING OF HOT DECARBURISATION SLAG IN ...

scrap addition. The refining time and the basicity (wt% CaO)/(wt% SiO 2) of the end refining slag were about 45 minutes and 2.0, respectively. The slag forming materials were lime, light-burned dolomite and cold-bonded pellet. In addition, a new slag pot with a special division mouth was designed for the charging of hot slag in the De-P converter.

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