calcium carbonate slag desulfurization

Leaching calcium from phosphogypsum desulfurization

2020-1-1  Phosphogypsum (PG) desulfurization slag is a calcium-rich residue from reductive decomposition of PG using sulfur as the reductant. We proposed a technology of preparation light calcium carbonate with PG desulfurization slag, which mainly contains two

Preparation of light calcium carbonate from phosphorus

2021-10-29  The purity of the obtained calcium carbonate was 97.90%, sedimentation volume was 3.5mL/g and whiteness was 94.2, meeting the norm of first grade product in (HG/T 2226—2010). Main polymorph of calcium carbonate crystals was vaterite. Key words: calcium phosphorus gypsum desulfurization slag, silica, leaching, calcium carbonate, preparation

Production of Precipitated Calcium Carbonate from Steel

2014-1-1  Eloneva performed calcium extraction experiments with blast furnace slag, desulfurization slag, ladle slag, and steel converter slag, as mentioned earlier. From blast furnace slag and ladle slag at maximum, 20% of the calcium was extracted with various solvents, while from desulfurization and steel converter slags over 50% extraction was obtained.

Calcium Carbonate JFE MINERAL Co., LTD.

2021-5-31  Calcium carbonate is made by grinding and screening limestone into granules or powder. Flue-gas desulfurization and industrial process neutralizers: Feed: Mixed and non-mixed feed: Fertilizer: Soil neutralizers: Calcium Carbonate; Slag, Iron and Steel. Iron and Steel Slag

AUTOCLAVED DESULFURIZATION SLAG BRICKS AN

desulfurization slag’s and basic oxygen furnace slag’s usability in construction purposes. The work was carried out in the fiber and particle engineering laboratory at thermal decomposition of calcium carbonate to lime and carbon dioxide. The rest is produced by the use of energy, especially from the combustion of fossil fuels (Nisbet et

Hot Metal Desulfurization Kinetics by

Hot metal Desulfurization kinetics were studied experimentally using CaO–Al 2O 3–SiO 2–MgO–TiO 2–Na 2O slags in the range of 1 773 K to 1 833 K. The results indicated that the rate of desulfurization increases with the Na 2O and MgO content in slag increase, the slag basicity increase, i.e., the ratio of CaO to SiO 2, Al 2O 3 and TiO

Research progress of flue gas desulfurization and

2020-10-16  the calcium carbonate in the slurry and the oxidation of blowing air for chemical reaction to be scale, corrode, and cause serious secondary pollution by waste water and slag. In the magnesium desulfurization method, MgO reacts with water to produce Mg(OH) 2, and Mg(OH) 2 neutralizes with SO 2 to produce MgSO 3, which is then oxidized by O 2

Improvement of desulfurization efficiency of Al-rich ladle

2021-1-29  Ladle furnace (LF) slag is a type of steel slag, which has limited applications due to its high S content. Aqueous carbonation is a prospective method for desulfurization of the LF slag. However, the Al-rich LF raw slag has very low desulfurization efficiency with carbonation method. This study investigated the improvement of desulfurization efficiency of the Al-rich LF slag with carbonation

Development of Synthetic Slag with Marble Waste and

2017-10-6  desulfurization tests. The mixtures from CA1 to CA5 were produced using conventional lime-based slags and Al 2 O 3 based slag. The mixtures from 6 to 10 (ending with RM) were produced in order to replace the conventional lime on the slags by carbonate marble waste. The mixtures 11 and 12 (ending with CAF and RMF) were formulated with fluorspar

SciELO Brasil Development of Synthetic Slag with

Increasing the content of solid MgO in the slags decreased the liquid phase, since the MgO increases the melt point of the slag. Despite the fact that carbonate decomposition content no marble waste (Table 3) improved the desulfurization by playing an important role on the sulfur transfer mechanism to the interface hot metal-slag, the presence

Calcium Carbonate JFE MINERAL Co., LTD.

2021-5-31  Calcium carbonate is made by grinding and screening limestone into granules or powder. Flue-gas desulfurization and industrial process neutralizers: Feed: Mixed and non-mixed feed: Fertilizer: Soil neutralizers: Calcium Carbonate; Slag, Iron and Steel. Iron and Steel Slag

Research progress of flue gas desulfurization and

2020-10-16  the calcium carbonate in the slurry and the oxidation of blowing air for chemical reaction to be scale, corrode, and cause serious secondary pollution by waste water and slag. In the magnesium desulfurization method, MgO reacts with water to produce Mg(OH) 2, and Mg(OH) 2 neutralizes with SO 2 to produce MgSO 3, which is then oxidized by O 2

Improving the desulfurization performance of CaCO3 with

2018-3-15  After adding 3g of humic acid, the desulfurization efficiency was improved obviously, and the instantaneous efficiency of 100% lasting for about 40 minutes. It can be seen that, calcium carbonate in the addition of humic acid sodium can significantly improve the absorption of calcium carbonate performance of SO 2.

Calcium-slag additive for steel desulfurization and method

A calcium-slag additive for use in desulfurization of molten steel contains, by weight, 10-25 percent calcium metal, 30-50 percent fluorspar, 10-30 percent aluminum oxide and 10-30 percent calcium oxide. The calcium-slag is produced by forming a molten mixture of lime, fluorspar and aluminum in a graphite-lined induction furnace and heating the

Development of Synthetic Slag with Marble Waste and

2017-10-6  desulfurization tests. The mixtures from CA1 to CA5 were produced using conventional lime-based slags and Al 2 O 3 based slag. The mixtures from 6 to 10 (ending with RM) were produced in order to replace the conventional lime on the slags by carbonate marble waste. The mixtures 11 and 12 (ending with CAF and RMF) were formulated with fluorspar

Combustion properties and desulfurization of high sulfur

Calcium carbonate is more efficient in char combustion than volatile combustion, whereas calcium hydroxide and sodium hydroxides are efficient as DSA in both char and volatile combustion. For most of the coals the desulfurization efficiencies are over 80% in case of Ca(OH)2 and NaOH for molar ratios of DSA to sulfur (Ca/S) of 2 and 3.

Research progress on preparation of calcium carbonate

2021-10-29  Abstract: Preparation of calcium carbonate can achieve high value-added utilization of carbide slag,which is important to the sustainable development of chemical engineering of carbide. Preparation method,especially the process of leaching and carbonation were introduced. The progress in producing calcium carbonate with carbide slag as well as its surface modification and crystal

Flue Gas Scrubbing with Limestone Slurry

2018-6-14  calcium carbonate rock which can react with sulfur dioxide. Limestone can therefore be used for desulfurization of flue gases. The reaction of sulfur di-oxide with dry limestone requires a very high temperature such as that available within the actual boiler furnace. The

Characterization and Valorization of Kanbara Reactor

2015-9-9  The desulfurization waste slag from hot metal pretreatment process is a typical solid waste generated in the integrated steel company. About 7- to 9-kg waste slag is produced per ton hot metal treated in the Kanbara Reactor (KR) desulfurization process, and the waste slag contains approximately 40–60 % CaO and large amounts of iron. Therefore, effectively valorization of these waste slags is

SciELO Brasil Development of Synthetic Slag with

Increasing the content of solid MgO in the slags decreased the liquid phase, since the MgO increases the melt point of the slag. Despite the fact that carbonate decomposition content no marble waste (Table 3) improved the desulfurization by playing an important role on the sulfur transfer mechanism to the interface hot metal-slag, the presence

AUTOCLAVED DESULFURIZATION SLAG BRICKS AN

desulfurization slag’s and basic oxygen furnace slag’s usability in construction purposes. The work was carried out in the fiber and particle engineering laboratory at thermal decomposition of calcium carbonate to lime and carbon dioxide. The rest is produced by the use of energy, especially from the combustion of fossil fuels (Nisbet et

Calcium Carbonate JFE MINERAL Co., LTD.

2021-5-31  Calcium carbonate is made by grinding and screening limestone into granules or powder. Flue-gas desulfurization and industrial process neutralizers: Feed: Mixed and non-mixed feed: Fertilizer: Soil neutralizers: Calcium Carbonate; Slag, Iron and Steel. Iron and Steel Slag

Calcium-slag additive for steel desulfurization and method

A calcium-slag additive for use in desulfurization of molten steel contains, by weight, 10-25 percent calcium metal, 30-50 percent fluorspar, 10-30 percent aluminum oxide and 10-30 percent calcium oxide. The calcium-slag is produced by forming a molten mixture of lime, fluorspar and aluminum in a graphite-lined induction furnace and heating the

Research progress of flue gas desulfurization and

2020-10-16  the calcium carbonate in the slurry and the oxidation of blowing air for chemical reaction to be scale, corrode, and cause serious secondary pollution by waste water and slag. In the magnesium desulfurization method, MgO reacts with water to produce Mg(OH) 2, and Mg(OH) 2 neutralizes with SO 2 to produce MgSO 3, which is then oxidized by O 2

Combustion properties and desulfurization of high sulfur

Calcium carbonate is more efficient in char combustion than volatile combustion, whereas calcium hydroxide and sodium hydroxides are efficient as DSA in both char and volatile combustion. For most of the coals the desulfurization efficiencies are over 80% in case of Ca(OH)2 and NaOH for molar ratios of DSA to sulfur (Ca/S) of 2 and 3.

Improving the desulfurization performance of CaCO3 with

2018-3-15  After adding 3g of humic acid, the desulfurization efficiency was improved obviously, and the instantaneous efficiency of 100% lasting for about 40 minutes. It can be seen that, calcium carbonate in the addition of humic acid sodium can significantly improve the absorption of calcium carbonate performance of SO 2.

Hot Metal Desulfurization Kinetics by

Hot metal Desulfurization kinetics were studied experimentally using CaO–Al 2O 3–SiO 2–MgO–TiO 2–Na 2O slags in the range of 1 773 K to 1 833 K. The results indicated that the rate of desulfurization increases with the Na 2O and MgO content in slag increase, the slag basicity increase, i.e., the ratio of CaO to SiO 2, Al 2O 3 and TiO

The studied concept for producing calcium carbonate from

Download scientific diagram The studied concept for producing calcium carbonate from CO2-rich gas and slag. from publication: Performance of Separation Processes for Precipitated Calcium

Reagents for Desulphurization of Hot Metal IspatGuru

2018-8-19  The reagents react chemically with the dissolved sulphur in the hot metal and form a sulphide which rises and is captured in the slag layer which is covering the hot metal. Sodium carbonate (Na2CO3), lime (CaO), calcium carbide (CaC2), and magnesium (Mg) are the powdered reagents normally used for the desulphurization of the hot metal.

Study on desulfurization performances of magnesium slag

2018-5-15  The desulfurization performance of modified magnesium slag was characterized by its calcium conversion rate. The desulfurization experiments were carried out in Thermal Gravimetric Analyzer. Based on hydration kinetics and fractal theory, the relationship between desulfurization performance and hydration degree or fractal characteristics were, respectively, analyzed.

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