additon of dolomite in slag

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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Effect of Electric Furnace Slag, Dolomite, and Micro ...

and for dolomite equivalent to EF slag 0%, 2%, 4%, 6%, 8%. Experimental design used was completely randomized design. The result indicated that addition of EF slag significantly increased soil pH, exchangeable Ca and Mg, available P, SiO2, and micro nutrients (Fe, Mn, and Zn).

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Slag Conditioner

The addition to the slag of, among other metal oxides, CaO and MgO, results in a breakdown of the tetrahedron structure forming liquid silicate compounds. The addition of CaO to slag is important for a number of reasons. First, it makes the slag more basic for improved interaction with the refractory lining and increasing lining durability.

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Dolomite – Its Processing and Application in Iron and ...

 · Dolomite addition is made during ironmaking for obtaining desired percentage of MgO in the BF slag. Addition of dolomite through sinter is more preferred route since CO2 of dolomite is driven out during the sintering process. In case of sintering, dolomite is crushed to -3 mm (in the range of 85 % to 90 %) in hammer crushers before mixing it in ...

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Dolomite Bricks

Dolomite brick is a kind of refractory products that is made from calcined dolomite sand. Generally speaking, the content of the calcium oxide is more than 40%, and that of magnesium oxide is 35% above. In addition, there are materials such as aluminium oxide and iron oxide. Dolomite brick can be divided into asphalt combined unburnt brick ...

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What refractories are suitable for ladle slag line&low ...

 · Rich MgO dolomite bricks are used between the slag line and the steel line to reduce wear in this area. One advantage of the dolomite brick for ladle is the reaction capacity with molten steel.

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Slag

Slag is the glass-like by-product left over after a desired metal has been separated (i.e., smelted) from its raw ore.Slag is usually a mixture of metal oxides and silicon dioxide.However, slags can contain metal sulfides and elemental metals. While slags are generally used to remove waste in metal smelting, they can also serve other purposes, such as assisting in the temperature control of ...

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Dissolution mechanism of dolomite in converter slag at ...

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. Discover ...

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Dolomite – Its Processing and Application in Iron and Steel Industr…

Limestone and Dolomite and their Use in Iron and Steel ...

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USES OF BURNT DOLOMITE – VU LAP THANH .,JSC

In fact, dolomite and 2 - 3% SiO2 and 2 - 5% Al2O3 + Fe2O3 + MnO2 are easier to sinter, giving the clinker hot to 1,750-1,700 and very good slag resistance. On the other hand, it is also found that dolomite contains 1 - 6% SiO2 not only harm but also anti-hydration product.

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Effect of calcined dolomite addition on sodium carbonate ...

Both reactive MgO and CaO are alternative activators for ground granulated blast furnace slag (GGBS). In this study natural dolomite, as a source of MgO and CaO, was calcined at 800 °C (D800) and ...

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Mechanical Properties and Morphology of Palm Slag, Calcium ...

The development of asbestos free brake pad composites using different fillers was investigated with a intention to substitute asbestos which is known hazardous and carcinogenic. Mechanical and morphology studies were made to clarify the mechanism for compressive strength, hardness and wear rate behavior of different filler of brake pad which were prepared by compression molding of mixture of ...

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Dolomite Lime – How Garden Lime Can Cause Problems

Dolomite is recommended to correct calcium and magnesium deficiencies. Depending upon magnesium levels, dolomitic lime can often cause more harm and trouble, however, than its initial cost. Excess magnesium is often associated with soil stickiness, crusting, compaction, reduced aeration, and releasing nitrogen from the soil pound for pound.

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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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Difference Between Limestone and Dolomite | Compare the ...

 · Dolomite is used as an ornamental decoration, as a source for magnesium extraction, in the making of concrete, in horticulture to add richness to the soil by balancing the pH of soil etc. What is the difference between Limestone and Dolomite? • Limestone is a calcium carbonate mineral whereas dolomite is made of calcium magnesium carbonate.

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dolomite | Formation, Structure, Properties, Uses, & Facts ...

Dolomite, type of limestone, the carbonate fraction of which is dominated by the mineral dolomite, calcium magnesium carbonate. Along with calcite and aragonite, dolomite makes up approximately 2 percent of the Earth''s crust. Learn more about the structure, properties, and uses of dolomite in …

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Use of Steel Slag in Subgrade Applications

In addition, the use of steel slag in geotechnical applications can help alleviate the slag ... dolomite) to produce steel. The steel slag generated as a by-product of the EAF steelmaking process is known as electric-arc-furnace slag. After completion of the primary steelmaking

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Activation of ground granulated blast furnace slag by ...

 · The performance of the different calcined dolomite activated slag pastes were then compared using compressive tests, pH measurement of pore solutions, powder X-ray diffraction (XRD) and thermogravimetric analysis (TGA). In addition, CaO activated slag paste was prepared as a reference. 2. Materials and methods2.1. Materials

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Evaluation of Sulfate Resistance of Calcined Dolomite ...

Request PDF | Evaluation of Sulfate Resistance of Calcined Dolomite Activated Ground Granulated Blast Furnace Slag | Aggressive environments significantly influence the durability and ...

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Slag Conditioner | Eryas Mining | olivine sand, EAF, AFS ...

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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Mechanical properties and microstructural analysis of slag ...

 · The addition of calcined dolomite up to 20 wt% had an apparent effect on increasing UPV values of the harden slag-dolomite paste specimens, but only the UPV values were slightly increased by 0.1 to 0.2% for those specimens with 30 to 40% of added calcined dolomite at ages of 28 and 56 days, respectively.

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Minerals | Free Full-Text | Geopolymers Based on ...

This study reports the effect of natural dolomite addition to fly ash and the mechanical activation of this blend on the geopolymerization process. Dolomite was replaced with fly ash at 1, 3, 5, and 10 wt.%. Geopolymers were synthesized at ambient temperature using NaOH solution as an alkaline agent. The geopolymerization process, reactivity of the raw material, compressive strength, and ...

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Dolomite and dolomitization model

 · Dolomite is an anhydrous carbonate mineral composed of calcium magnesium carbonate, ideally CaMg (CO 3) 2 . The term is also used for a sedimentary carbonate rock composed mostly of the mineral dolomite. An alternative name sometimes used for the dolomitic rock type is dolostone. Dolomite is an unusual carbonate mineral.

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Slag splashing technique in converter operation – IspatGuru

 · Slag splashing technique in converter operation. satyendra; March 24, 2013; 3 Comments ; lining life, MgO saturation, slag conditioning, slag corrosin, slag splashing, slag viscosity,; Slag splashing technique in converter operation. It is known that the wear of refractory lining in an oxygen steelmaking converter for the production of liquid steel is a factor which greatly influences the ...

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Chemical, Mineralogical, and Morphological Properties of ...

 · Steel slag is a byproduct of the steelmaking and steel refining processes. This paper provides an overview of the different types of steel slag that are generated from basic-oxygen-furnace (BOF) steelmaking, electric-arc-furnace (EAF) steelmaking, and ladle-furnace steel refining processes. The mineralogical and morphological properties of BOF and electric-arc-furnace-ladle [EAF(L)] slag ...

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Effect of calcined dolomite addition on sodium carbonate ...

Effect of calcined dolomite addition on sodium carbonate-activated slag cements with different curing methods Open PDF. Advances in Cement Research. ... September, 2019, pp. 370-381. Prev Next > Effect of calcined dolomite addition on sodium carbonate-activated slag cements with different curing methods Authors: Wei Zhang. x.

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Evolution of dolomite composition and reactivity during ...

 · In addition, a CO 2 peak similar to that obtained during the TPD tests is observed for both samples. However, for used dolomite, the maximum of this peak is achieved at slightly higher temperature than during TPD (790 °C vs 715 °C), and the amount of CO 2 released is much higher. This difference can be attributed to the oxidation of a more ...

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Slag conditioner composition, process for manufacture and ...

Steelmakers, who added burned limestone for the CaO component in the basic slag, began to add burned dolomite or a blend of the burned limestone and burned dolomite to supply not only CaO but also MgO as a slag addition to satisfy the demand for MgO in the slag. Refractory lining life improved but wear remained a continuing problem requiring ...

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Activation of ground granulated blast furnace slag by ...

significantly accelerate the early hydration of MgO-slag without sacing the long-term strength. In addition, when the MgO/CaO ratio was ≤1 by weight, only a small difference in compressive strengths of pastes was observed. Dolomite is a naturally occurring …

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THE EFFECT OF GRAPHITE ADDITION ON CORROSION …

In addition, the effect of aluminum as an ... atmosphere and iron oxide in the slag are observed [5-7]. Nowadays, dolomite-carbon and magnesia-carbon refractories are used in

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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

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Utilizing Iron and Steel Slag''s in Environmental ...

utilization of slag from steelmaking and ladle furnaces (Koros, 2003). Iron and steel slags are formed through the addition of fluxing agents such as but not limited to limestone or dolomite to blast furnaces and steel furnaces to strip the impurities from iron ore, steel scrap, and other ferrous feeds.

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Role of Slag in Converter Steelmaking – IspatGuru

 · Slag is formed during refining of hot metal in which Si oxidizes to SiO2, Mn to MnO, Fe to FeO, and P to P2O5 etc., and addition of oxides such as CaO (lime), MgO (calcined dolomite), iron oxide, and others. The addition of oxides is done to obtain desired physico-chemical properties of slag like melting point, basicity, viscosity etc.

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Development of Ground-Granulated Blast-Furnace Slag ...

 · It is observed that the addition of dolomite into slag-based GPC reduces the setting time, enhances workability, and rapidly improves the early-age strength. Addition of dolomite into slag GPC also improves the durability properties, such as high resistance towards water absorption, sorptivity, marine attack, and chemical attack.

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(PDF) Energy Saving Effect of Slag Foaming by Carbonate ...

66 to 80-93 %. Finally, the energy saving effect of 10-30 kW/ton was reported in the case of. well-controlled slag foaming for 150 ton electric arc furnace. Another report in the literature [6 ...

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Dolomites | definition of Dolomites by Medical dictionary

dolomite. A general term for a specific form of calcium-magnesium carbonate that may used as a calcium supplement to ensure healthy bones, which is mined in the Dolomites in northeast Italy. Some of the mineral deposits are contaminated with heavy metals (lead, cadmium, etc.), for which the FDA sets a maximum level of 5 ppm (which dolomite ...

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Replacement of Cement with Dolomite Powder: An ...

percentage of PC is substituted with either slag and other mineral additives such as limestone and silica fume, are now commonly used, and which reduce the production of PC, as well as enhance the performance. Many materials are used to manufacture good quality concrete. ... addition of dolomite powder the Split Tensile strength decreases. We ...

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Hydrology and geochemistry of a slag-affected aquifer and ...

Slag is a by-product of steel manufacturing and a ubiquitous fill material in northwestern Indiana. Ground water associated with slag deposits generally is characterized by high pH and elevated concentrations of many inorganic water-quality constituents. The U.S. Geological Survey, in cooperation with the Indiana Department of Environmental Management, conducted a study in northwestern Indiana ...

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Effects of calcined dolomite addition on reaction kinetics ...

Calcined dolomite addition accelerates reaction kinetics of Na 2 CO 3-activated slag. Abstract In the present study, an environment-friendly one-part alkali-activated cement dry mixture was prepared by using blast furnace slag as the aluminosilicate precursor, solid sodium carbonate as the alkali activator and calcined dolomite (CD) as the ...

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