Efficiency of Use of Galvanic Sludge in Cement Systems

Stepanov, S. V.; Морозов, Н М; Morozova, Nina; Ayupov, Damir; Makarov, Dmitry; Baishev, Daniil

doi:10.1016/j.proeng.2016.11.827

Cited by 14 publications

(8 citation statements)

References 3 publications

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“…For these reasons, they are used to a significant extent in the mechanical, electrochemical, construction, optical industry, medicine, etc. In previous research, stabilization of toxic metals from galvanic sludge was performed by various chemicaltechnological processes, such as: obtaining clinker for cement production [16,17], inertization of toxic metals of galvanic sludge in clay-based ceramics [18,19], production of red ceramics using galvanic sludge and diatomite as raw material [20], inertization of galvanic sludge by incorporation into clay bricks [21], use of ash and sulfoaluminate cement in stabilization of toxic metals from galvanic sludge [22], incorporation of toxic metals from galvanic sludge and galvanic sludge glass-ceramic solution [23,24]. This paper presents a flow diagram of the inactivation of toxic metals from waste galvanic sludge by transferring it into a sintered product, using waste industrial materials, such as: slag from the technological process of iron production, fly ash, cathode glass and natural zeolite material, Figure 5.…”

Section: Diagram Of Inactivation Of Waste Galvanic Sludge Flowmentioning

confidence: 99%

Inactivation of toxic metals from waste galvanic sludge by other hazardous waste

Stojković¹,

Stanisavljević²,

Krstić³

et al. 2020

Safety Engineering

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The paper presents the process of inactivation of toxic metals from waste galvanic sludge by other waste materials such as waste sludge from the technological process of iron production, waste ash from thermal power plants, zeolite and waste cathode glass. Inactivation is performed by the sintering process at high temperatures. The obtained sintered product has such a structure that where toxic metals present in it can not be started even under critical conditions. Furthermore, such a product can have a usevalue and the risk of environmental pollution is reduced to a minimum.

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Section: Diagram Of Inactivation Of Waste Galvanic Sludge Flowmentioning

confidence: 99%

Inactivation of toxic metals from waste galvanic sludge by other hazardous waste

Stojković¹,

Stanisavljević²,

Krstić³

et al. 2020

Safety Engineering

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show abstract

“…To avoid such an unsafe phenomenon, transverse reinforcement should be installed. Transverse reinforcement holds the transverse deformations of concrete that can occur during longitudinal compression, which leads to an overestimated resistance of concrete to longitudinal compression, as well as the subsequent appearance of the first longitudinal cracks in the concrete [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Method for optimizing the number of glass-fiber reinforced plastic rebars in concrete structures

2021

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Innovations in the construction industry have led to a change in the technological structure, the use of end-to-end technologies, innovative materials, information management and the need for new technical, technological and managerial solutions. The research problem is the optimal placement of glass-fiber reinforced plastic bars in concrete structures. It took several steps to solve the research problem: 1) development of an algorithm for solving the design problem in TEKLA Structures; 2) performing of calculations based on the finite element method in LIRA-SAPR, which were further reproduced in Rhinoceros and Grasshopper (based on interoperability in a single BIM environment); 3) implementation of the optimization algorithm using the parametric optimization method; 4) A practical calculation of determining the optimal values of the loads of glass-fiber reinforcement in the slab on the example of a typical design problem of a structural element of a construction facility; 5) calculation of positive economic effect. The conclusion is that the algorithm can be used in the practice of building design.

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“…The recovery of galvanic baths is beneficial in the mechanical industry to avoid corrosion problems in materials [6]. Nevertheless, it generates hazardous industrial waste as the residual sludge of the process baths, mainly from rinsing in the stages of stripping and degrease [7].…”

Section: Introductionmentioning

confidence: 99%

“…Since galvanic sludge wastes are hazardous due to their chemical composition, they need final treatment or disposal in a safe landfill. Worldwide the implemented skills are mainly: disposal in 2 of 13 soils, thermal treatments as pyrolysis/incineration [8][9][10][11], encapsulation [12], as a component of other solid materials [3,7,[13][14][15]. Similarly, some techniques as inertization of heavy metals present in this type of sludge have been studied [2].…”

Section: Introductionmentioning

confidence: 99%

Catalytic Cracking of Heavy Crude Oil over Iron-Based Catalyst Obtained from Galvanic Industry Wastes

et al. 2020

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Sewage sludge from the galvanic industry represents a problem to the environment, due to its high metal content that makes it a hazardous waste and must be treated or disposed of properly. This study aimed to evaluate the sludge from three galvanic industries and determine its possible use as catalysts for the synthesis of materials. Catalyst was obtained from a thermal process based on dried between 100–120 °C and calcination of sludges between 400 to 700 °C. The physical–chemical properties of the catalyst were analyzed by several techniques as physisorption of N2 and chemisorption of CO of the material. Catalytic activity was analyzed by thermogravimetric analysis of a thermo-catalytic decomposition of crude oil. The best conditions for catalyst synthesis were calcination between 400 and 500 °C, the temperature of reduction between 750 and 850 °C for 15 min. The catalytic material had mainly Fe as active phase and the specific surface between 17.68–96.15 m2·g−1, the catalysts promote around 6% more weight-loss of crude oil in the thermal decomposition compared with assays without the catalyst. The results show that the residual sludge of galvanic industries after thermal treatment can be used as catalytic materials due to the easiness of synthesis procedures required, the low E-factor obtained and the recycling of industrial waste promoted.

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Efficiency of Use of Galvanic Sludge in Cement Systems

Cited by 14 publications

References 3 publications

Inactivation of toxic metals from waste galvanic sludge by other hazardous waste

Inactivation of toxic metals from waste galvanic sludge by other hazardous waste

Method for optimizing the number of glass-fiber reinforced plastic rebars in concrete structures

Catalytic Cracking of Heavy Crude Oil over Iron-Based Catalyst Obtained from Galvanic Industry Wastes

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