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Chatti, Ravikrishna V.
- Synthesis and Characterization of Yellow Gypsum from LD Slag Fines Generated in a Steel Plant
Abstract Views :248 |
PDF Views:92
Authors
Shrenivas Ashrit
1,
Pradip K. Banerjee
1,
Ravikrishna V. Chatti
1,
Venugopal Rayasam
2,
Udayabhanu Gopalakrishnan Nair
3
Affiliations
1 R&D and Scientific Services Department, Tata Steel Limited, Jamshedpur 831 007, IN
2 FME Department, Applied Chemistry Department, Indian School of Mines, Dhanbad 826 004, IN
3 Applied Chemistry Department, Indian School of Mines, Dhanbad 826 004, IN
1 R&D and Scientific Services Department, Tata Steel Limited, Jamshedpur 831 007, IN
2 FME Department, Applied Chemistry Department, Indian School of Mines, Dhanbad 826 004, IN
3 Applied Chemistry Department, Indian School of Mines, Dhanbad 826 004, IN
Source
Current Science, Vol 109, No 4 (2015), Pagination: 727-732Abstract
We describe here a simple method for synthesis of a value-added product (yellow gypsum) from Linz-Donawitz slag (LD slag), which is an industrial waste product of the steel industry. XRD analysis of the product confirmed the presence of anhydrite and gypsum phases as well as the presence of iron, silica and titanium in the form of fayalite and illmenite phases. A weight loss of 17.26% was observed from the TG analysis, indicating the presence of mixture of the dihydrate, hemihydrate, soluble γ-anhydrite and insoluble β-anhydrite phases of gypsum in the product.Keywords
LD Slag, Steel Plant, Synthesis and Characterization, Yellow Gypsum.Full Text
- Application of ICP-MS Technique for Analysis of Heavy Metals in LD Slag Fines
Abstract Views :248 |
PDF Views:79
Authors
Affiliations
1 Tata Steel Limited, Jamshedpur - 831007, IN
2 FME Department, and Department of Applied Chemistry, Indian Institute of Technology (Indian School of Mines), Dhanbad - 826004, IN
3 Department of Applied Chemistry, Indian Institute of Technology (Indian School of Mines), Dhanbad - 826004, IN
1 Tata Steel Limited, Jamshedpur - 831007, IN
2 FME Department, and Department of Applied Chemistry, Indian Institute of Technology (Indian School of Mines), Dhanbad - 826004, IN
3 Department of Applied Chemistry, Indian Institute of Technology (Indian School of Mines), Dhanbad - 826004, IN
Source
Current Science, Vol 115, No 5 (2018), Pagination: 973-977Abstract
Inductively coupled plasma-mass spectrometry (ICPMS) is a powerful tool for analysing trace metals in environmental samples, industrial wastes and samples of biogenic nature. In the present study, this technique has been used to analyse the content of heavy metals in trace levels which specifically include elements like lead, cadmium, selenium and arsenic in LD slag fines. LD slag is the waste generated during the Linz– Donawitz steel making process or the basic oxygen furnace process. LD slag fines in the size range 0–6 mm are obtained after the recovery of metallic iron by means of physical separation in waste recycling plants, and are mostly recycled in sinter-making process. The non-metallic portion of LD slag fines is generally used as an aggregate in road construction, in acid mine drainage treatment and as an acidic soil conditioner. All these applications require a thorough analysis of trace and heavy metals as they can leach and penetrate into the soil and potentially contaminate it. The present study addresses this issue by analysing heavy metals in traces levels using ICP-MS. The analysis reveals that most of the heavy and hazardous elements are present in very low concentrations in the slag itself when compared with the EPA maximum allowed concentration in the leachate samples. However, the concentration of mercury in LD slag is more than the limit set by EPA in the leachate, and leachability of mercury needs to be studied further. The study also reveals that there are traces of platinum and palladium in the slag, indicating the requirement of future studies to understand their economic recovery.Keywords
Heavy Metals, LD Slag, Mass Spectrometry, Fires, Steel Making.Full Text
References
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- Potential Application of Yellow Gypsum From LD Slag as a Soil Conditioner
Abstract Views :227 |
PDF Views:94
Authors
Affiliations
1 R&D Department, Tata Steel Limited, Jamshedpur 831 007, IN
2 Department of Fuel, Minerals and Metallurgical Engineering, Dhanbad 826 004, IN
3 Applied Chemistry Department, Indian Institute of Technology (Indian School of Mines), Dhanbad 826 004, IN
1 R&D Department, Tata Steel Limited, Jamshedpur 831 007, IN
2 Department of Fuel, Minerals and Metallurgical Engineering, Dhanbad 826 004, IN
3 Applied Chemistry Department, Indian Institute of Technology (Indian School of Mines), Dhanbad 826 004, IN
Source
Current Science, Vol 118, No 1 (2020), Pagination: 118-122Abstract
In the present study, ICP-AES and ICP-MS techniques were used to analyse and validate the content of heavy and trace elements in yellow gypsum samples produced by a chemical process from a solid waste generated at an integrated steel plant. The present study tries to demonstrate that the content of heavy metals like lead, mercury and arsenic in yellow gypsum is less than the toxicity characteristic leaching procedure (TCLP) norms set for a comparable industrial by-product phospho-gypsum. This study also concludes that yellow gypsum contains some elements (copper, boron, etc.) in traces, apart from heavy metals which are beneficial to plants as micronutrients.Keywords
Heavy Metals, IICP-MS, ICP-AES, Trace Elements, Yellow Gypsum.Full Text
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