Preparation of Adsorbent with High Removal Ability for Phosphate Ion from Blast Furnace Slag using Alkali Fusion

Wajima, Takaaki; Oya, Kazuko; Shibayama, Atsushi; Munakata, Kenzo

doi:10.5188/ijsmer.18.59

Cited by 5 publications

(3 citation statements)

References 26 publications

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“…The synthesis of hydrogarnet from converter slag involves three steps: alkali fusion, agitation, and crystallization, and the synthesis conditions, such as fusion temperature, NaOH additional amount, fusion time, agitation time and crystallization temperature, were determined based on previous studies [18][19][20] . In the alkali fusion step, 20 g of the converter slag was mixed with 32 g of NaOH and ground to obtain a homogeneous mixture.…”

Section: Synthesismentioning

confidence: 99%

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Conversion of Steel Converter Slag into HCl Gas Scavenger Using Alkali Fusion

Wajima

2021

RESOURCES PROCESSING

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Steel converter slag, a by-product of iron-and steel-making plants, was converted into a hydrogarnet-containing product using the alkali fusion method. The converter slag was transformed into an alkali-fused slag with reactive phases via alkali fusion using sodium hydroxide at 600°C for 6 h, after which the fused slag was stirred in distilled water at ambient temperature to prepare a precursor to synthesize a product, comprising hydrogarnet, by heating the precursor at 80°C. This product could remove HCl gas at a high temperature (800°C) and showed higher Cl fixation than slag and lime. These results suggest that a novel product capable of removing HCl gas at high temperatures can be synthesized from converter slag via alkali fusion.

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Section: Synthesismentioning

confidence: 99%

“…After the synthesis, the waste solution contained Fe, Si, and Ca (10, 1500, and 40 mg/L, respectively), with a high alkalinity. It may be used as a flocculant or coagulation aid for acid turbid water treatment 20 .…”

Section: Synthesismentioning

confidence: 99%

Conversion of Steel Converter Slag into HCl Gas Scavenger Using Alkali Fusion

Wajima

2021

RESOURCES PROCESSING

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“…Although it has been widely used for cement production, road construction, and as a concrete aggregate, the capacity for use of recycled BF slag in these fields has become saturated and the development of value-added products from such waste slag has become an important issue for sustainability. Therefore, research has recently been made in various recycling processes [2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Hydrogarnet from Blast Furnace Slag Using Alkali Fusion for HCl Gas Removal

Wajima

2022

Int.J.Soc.Mater.Eng.Resour.

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Blast furnace (BF) slag, one of the by-products of iron-and steel-making plants, was converted into the product including hydrogarnet using the alkali fusion method for HCl gas removal. The slag with diameters of less than 2 mm was transformed into the alkali-fused slag with reactive phases via alkali fusion using sodium hydroxide at 600°C for 6 h, after which the fused slag was added to distilled water and stirred at room temperature to prepare the precursor to synthesize the product including a hydrogarnet by heating at 80-160°C. The product could remove HCl gas at high temperature (800°C), and Cl fi xation in the product follows the pseudo-first-order kinetics model rather than the pseudo-second-order kinetics model. These results suggest that a novel product able to remove HCl gas at high temperature can be synthesized from BF slag via alkali fusion.

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