Rinse water regeneration in stainless steel pickling

Schmidt, Burkhard; Wolters, Ralf; Kaplin, Jyri; Schneiker, Thorsten; Lobo-Recio, Maria de los Angeles; López, Félix A.; López‐Delgado, Aurora; Alguacil, Francisco José

doi:10.1016/j.desal.2006.03.591

Cited by 21 publications

(10 citation statements)

References 6 publications

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“…In the steel industries, to provide an effective and sustainable stainless steel production, most steel plants choose aggressive acids involving nitric acid, hydrofluoric acid, phosphoric acid (Li et al, 2005;Schmidt et al, 2007;RegelRosocka, 2010;Rogener et al, 2012), and so on to remove the several adherent oxides. Especially when using H 3 PO 4 , a great deal of phosphated residue (PR) is produced in this process.…”

Section: Introductionmentioning

confidence: 99%

Recycling Phosphated Residue for Pb²⁺ Removal from Wastewater

DongXiaoli

Yan

SunXiuyun

et al. 2016

Environmental Engineering Science

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Phosphated residue (PR), a common solid waste generated from iron and steel plants, was directly reused for removing Pb 2+ from wastewater by adsorption. Effectiveness and mechanism of Pb 2+ removal by PR were investigated by batch experiments. The toxicity characteristic leaching procedure (TCLP) test confirmed that PR was a nonhazardous material and could be used as an adsorbent for subsequent experiments. Studies of pH impact showed that the optimum pH for Pb 2+ adsorption on PR was 5.2 -0.2. Kinetic studies illustrated that the sorption behavior of Pb 2+ could be described better by pseudo-second order model with high correlation coefficient (0.9999). Sorption equilibrium data could be appropriately fitted by the Langmuir model and the maximum adsorption capacity of Pb 2+ obtained from Langmuir equation was 151.2 mg/g. Results of X-ray diffraction (XRD) and scanning electron microscopy-energy dispersive spectrum (SEM-EDS) analysis indicated that dissolution and precipitation mechanism predominated for the sorption. For fixed column experiments, PR was capable of reducing not only the high Pb 2+ level, but also low concentration and it could be kept effective before contact time was 4,200 min at pH = 5. In addition, an interesting finding was that PR could reduce the mobility of Pb in the soil media. The above shows that PR has significant potential in Pb 2+ removal from real wastewater.

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Section: Introductionmentioning

confidence: 99%

Recycling Phosphated Residue for Pb²⁺ Removal from Wastewater

DongXiaoli

Yan

SunXiuyun

et al. 2016

Environmental Engineering Science

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“…Stainless steel pickling is mainly carried out with an aggressive solution (nitric acid and hydrofluoric acid) [2,24]. Precipitation with lime is one of the oldest methods applied to spent pickling liquor disposing, still used in many plants [25].…”

Section: Introductionmentioning

confidence: 99%

Treatment method of hazardous pickling sludge by reusing as glass–ceramics nucleation agent

et al. 2015

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Heavy metal containing pickling sludge (PS) is one of the by-products of the stainless-steel-making industry, which has been considered hazardous due to contained chromium and nickel. Traditional methods of PS disposing are landfill and cement solidification. This research is aimed at disposing PS by solidification/stabilization and reusing it as a nucleation agent of glass-ceramics. The crystallization behavior and the properties of a glass in the CaO-MgO-SiO 2 -Al 2 O 3 system were studied by considering PS as the nucleation agent. Experimental results confirm that introducing 14 wt% PS as the nucleation agent of glass-ceramics can decrease crystallization temperature by 110.8°C, refine the grain size by forming isometric crystals with size of 2 lm, enhance Vickers hardness by 2690 MPa and decrease water absorption from (1.21 ± 0.10) wt% to (0.04 ± 0.01) wt%. Therefore, it is reasonable to conclude that PS can be utilized as a nucleation agent to improve the crystallization and mechanical properties of the glass-ceramics. The testing results of US EPA toxicity characteristic leaching procedure (TCLP) confirm the safety of this reusing method.

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“…Pickling technologies for metal products are basically similar; only the pickling media are different. A number of investigations on pickling media have been reported [4][5][6][7], and considerable interest has been focused on environmentally friendly operations together with quality and cost. Pickling metal products are a hydrometallurgical processing consisting of mechanical descaling, electrochemical, and/or chemical operations [7].…”

Section: Introductionmentioning

confidence: 99%

“…A number of investigations on pickling media have been reported [4][5][6][7], and considerable interest has been focused on environmentally friendly operations together with quality and cost. Pickling metal products are a hydrometallurgical processing consisting of mechanical descaling, electrochemical, and/or chemical operations [7]. The rate of pickling is affected by several variables, including the base metal product constituents, the type of adherence of oxides, time in the liquid bath, acid concentration, pickling bath temperature, and turbulence intensity [2,8].…”

Section: Introductionmentioning

confidence: 99%

DNN-Based ADNMPC of an Industrial Pickling Cold-Rolled Titanium Process via Field Enhancement Heat Exchange

Yang

Peng

et al. 2015

International Journal of Chemical Engineering

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The dynamic neural network based adaptive direct nonlinear model predictive control is designed to control an industrial microwave heating pickling cold-rolled titanium process. The identifier of the direct adaptive nonlinear model identification and the controller of the adaptive nonlinear model predictive control are designed based on series-parallel dynamic neural network training by RLS algorithm with variable incremental factor, gain, and forgetting factor. These identifier and controller are used to constitute intelligent controller for adjusting the temperature of microwave heating acid. The correctness of the controller structure, the convergence, and feasibility of the control algorithms is tested by system simulation. For a given point tracking, model mismatch simulation results show that the controller can be implemented on the system to track and overcome the mismatch system model. The control model can be achieved to track on pickling solution concentration and temperature of a given reference and overcome the disturbance.

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Rinse water regeneration in stainless steel pickling

Cited by 21 publications

References 6 publications

Recycling Phosphated Residue for Pb²⁺ Removal from Wastewater

Recycling Phosphated Residue for Pb²⁺ Removal from Wastewater

Treatment method of hazardous pickling sludge by reusing as glass–ceramics nucleation agent

DNN-Based ADNMPC of an Industrial Pickling Cold-Rolled Titanium Process via Field Enhancement Heat Exchange

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Rinse water regeneration in stainless steel pickling

Cited by 21 publications

References 6 publications

Recycling Phosphated Residue for Pb2+ Removal from Wastewater

Recycling Phosphated Residue for Pb2+ Removal from Wastewater

Treatment method of hazardous pickling sludge by reusing as glass–ceramics nucleation agent

DNN-Based ADNMPC of an Industrial Pickling Cold-Rolled Titanium Process via Field Enhancement Heat Exchange

Contact Info

Product

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Recycling Phosphated Residue for Pb²⁺ Removal from Wastewater

Recycling Phosphated Residue for Pb²⁺ Removal from Wastewater