scholarly journals Preparation of Black Ceramic Tiles Using Waste Copper Slag and Stainless Steel Slag of Electric Arc Furnace

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 776
Author(s):  
Mengke Liu ◽  
Guojun Ma ◽  
Xiang Zhang ◽  
Junjie Liu ◽  
Qiang Wang
Keyword(s):  
Stainless Steel ◽  
Ceramic Tile ◽  
Steel Slag ◽  
Copper Slag ◽  
Electric Arc ◽  
National Standard ◽  
Molar Ratio ◽  
Arc Furnace ◽  
Ceramic Tiles ◽  
Stainless Steel Slag

Copper slag and stainless steel slag of Electric Arc Furnace (EAF) are two typical metallurgical solid wastes, which contain a large number of valuables, such as Fe, Cr, and Cu. The transition metal elements in the waste slags, such as Cr and Fe, can be recycled as the coloring ions in the black ceramic tile. In this study, the Fe/Cr molar ratio in the raw materials of copper slag and stainless steel slag was adjusted, and the black ceramic tile was subsequently prepared by sintering. The results show that the optimum process parameters for the preparation of black ceramic tiles are the Fe/Cr molar ratio of 2.0, the sintering temperature of 1150 °C, and the sintering time of 30 min. The compressive strength of the black ceramic tile at optimum sintering conditions exceeds the minimum compressive strength of the Chinese national standard for standard polished tiles, and the concentrations of harmful elements, for example, Cr, Cu, Ni, As, Zn, Pb, and Cr(VI) are within the regulation thresholds specified by the Chinese national standard.

scholarly journals Recovery of Chromium from Slags Leachates by Electrocoagulation and Solid Product Characterization

Metals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1593
Author(s):  
Lubomir Pikna ◽  
Maria Hezelova ◽  
Agnieszka Morillon ◽  
David Algermissen ◽  
Ondrej Milkovic ◽  
...  
Keyword(s):  
Steel Slag ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Low Carbon ◽  
Solid Product ◽  
Stainless Steel Slag ◽  
Carbon Ferrochrome ◽  
Ferrochrome Slag ◽  
Comparison Of The Results

Slags produced in the steelmaking industry could be a source of chromium. Slags contain, depending on different types of slags, between 2 to 5 wt.% of Cr. Roasting of slag with NaOH, followed by subsequent leaching can produce leachates which can be efficiently processed using electrocoagulation (EC). This paper provides results from the EC process optimization for Cr(VI) solutions with initial concentration 1000 mg/L of Cr(VI). Influence of pH, current intensity and NaCl concentration on the efficiency of chromium recovery, energy consumption as well as solid product composition is discussed in detail. Optimum of pH = 6 was chosen for EC processing of Cr leachates as well as current intensities of 0.1–0.5 A because of the higher Cr/Fe ratio in solid product compared to higher current intensities. Results of EC processing of four real leachates of electric arc furnace carbon steel slag (EAFC), electric arc furnace stainless steel slag (EAFS), low carbon ferrochrome slag (LC FeCr) and high carbon ferrochrome slag (HC FeCr) were evaluated. Comparison of the results of four real leachate samples is presented. Obtained final solid product was identified as (Fe0.6 Cr0.4)2O3 and with up to 20% of Cr could be used as source of chromium in the ferrochrome production.

Combining Recovering Iron with Activating the Residual Slag Process for Electric Arc Furnace (EAF) Slag

2013 ◽  
Vol 275-277 ◽  
pp. 2206-2209
Author(s):  
Zhi Wei Liu ◽  
Yu Li ◽  
Da Qiang Cang ◽  
Yi Chen ◽  
Shuai Jiang ◽  
...  
Keyword(s):  
Steel Slag ◽  
First Grade ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
National Standard ◽  
Arc Furnace ◽  
Iron Concentrate ◽  
Slag Powder ◽  
Activating Agent ◽  
Eaf Slag

Electric arc furnace (EAF) slag is the byproduct of electric arc furnace in the process of metallurgy. In this paper, a recovering iron process combined with an activating residual slag process for EAF slag has been put forward. Researches show that increasing fineness of EAF slag is adverse to recover iron from the slag and 21.27% of the EAF slag could be separated as recovered iron concentrate with grade of 64.34%. The residual slag after magnetic separation process could be activated through mixing activating agent. Hemihydrates gypsum was the best activating agent to improve reactivity of the residual slag, which could meet the requirement of the first grade of steel slag powder in national standard. Then residual slag cements had been successfully prepared with 30% of activated residual slag and a 28-day compressive strength of 44.46MPa.

scholarly journals Briquette smelting in electric arc furnace to recycle wastes from stainless steel production

2015 ◽  
Vol 22 (S1) ◽  
pp. 10-16 ◽  
Author(s):  
Qi-xing Yang ◽  
An-jun Xu ◽  
Peng Xue ◽  
Dong-feng He ◽  
Jian-li Li ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Steel Production ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Stainless Steel Production

scholarly journals The effect of microstructure on the leaching behaviour of electric arc furnace (EAF) carbon steel slag

2016 ◽  
Vol 102 ◽  
pp. 810-821 ◽  
Author(s):  
D. Mombelli ◽  
C. Mapelli ◽  
S. Barella ◽  
C. Di Cecca ◽  
G. Le Saout ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Steel Slag ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Leaching Behaviour ◽  
Effect Of Microstructure

Upgrading constructed wetlands phosphorus reduction from a dairy effluent using electric arc furnace steel slag filters

2007 ◽  
Vol 56 (3) ◽  
pp. 135-143 ◽  
Author(s):  
D. Weber ◽  
A. Drizo ◽  
E. Twohig ◽  
S. Bird ◽  
D. Ross
Keyword(s):  
Removal Efficiency ◽  
Constructed Wetlands ◽  
Steel Slag ◽  
Dairy Farm ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Management Approach ◽  
Arc Furnace ◽  
Treated Water ◽  
P Removal

In 2003, a subsurface flow constructed wetlands (SSF-CW) system was built at the University of Vermont (UVM) Paul Miller Dairy Farm as an alternative nutrient management approach for treating barnyard runoff and milk parlour waste. Given the increasing problem of phosphorus (P) pollution in the Lake Champlain region, a slag based P-removal filter technology (PFT) was established (2004) at the CW with two objectives: (i) to test the filters' efficiency as an upgrade unit for improving P removal performance via SSF-CW (ii) to investigate the capacity of filters technology to remove P as a “stand alone” unit. Six individual filters (F1–F6) were filled with electric arc furnace (EAF) steel slag, each containing 112.5 kg of material with a pore volume of 21 L. F1–F4, fed with CW treated water, received approximately 2.17 g DRP kg−1 EAF steel slag (0.25 kg DRP total) during the 259 day feeding period. F1–F4 retained 1.7 g DRP kg−1 EAF steel slag, resulting in an average P removal efficiency of 75%. The addition of filters improved CW DRP removal efficiency by 74%. F5 and F6, fed non-treated water, received 1.9 g DRP kg−1 EAF steel slag (0.22 kg DRP in total) and retained 1.5 g DRP kg−1 resulting in a P removal efficiency of 72%. The establishment of the EAF slag based PFT is the first in-field evaluation of this technology to reduce P from dairy farm effluent in Vermont.

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