This study identifies environmental, economic and social criteria to be considered for the site selection of an integrated hazardous waste disposal facility. The Delphi method was employed in this study to gather information on the site selection criteria for siting a fully integrated hazardous waste disposal facility in Malaysia.
Copper slag waste has continued to cause increasing concerns due to the huge volumes being produced annually worldwide. This paper presents a review of copper slag as a potential resource for cobalt and copper metals for a circular economy. An overview of the chemical and mineralogical characterisation of copper slag from 21 …
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Steel slag is a solid waste produced in crude steel smelting, and a typical management option is stockpiling in slag disposal yards. Over the years, the massive production of steel slags and the continuous use of residue yards have led to vast occupation of land resources and caused severe environmental concerns. Steel slag …
Oluwasola et al. [9] studied the utilisation of steel slag aggregate in road construction and suggest steel slag should be weather for at least three months to reduce volumetric instability before ...
A considerable amount (more than tens of millions of tons) of slag has been collected as discarded waste in the landlled site of steelmaking company. Recovery of valuable metals and materials to the recycling of slag could be an urgent decision for solving this problem.
Abstract. Direct discharge of laundry greywater without any water pre-treatment in the drainage. system has become a common practice in Malaysia. The study aimed to utilise steel slag as an ...
The first generation of methods for slag heat recovery was focused on the development of physical granulation to break the liquid slags into small particles or droplets to increase the heat exchange surface due to the low thermal conductivity.
As solid waste posing a great threat to the environmental system, the disposal of arsenic-alkali slag has become the top priority in the development of the antimony industry. In this paper, a novel technological scheme combining the advantages of chemical precipitation and fractional crystallization is proposed for the safe disposal and ...
Therefore, in this project, an attempt was made to recycle electric arc furnace (EAF) slag waste, obtained from Malaysia's steel making industry, into ceramic tile via conventional powder compaction method. …
Environmental Quality (Scheduled Wastes) Regulations 1989, made under the Environmental Quality Act 1974 which regulate the generation, transportation and disposal of wastes through a notification and licensing system for facilities.
Steel production necessarily involves production of millions of tons of slag as well as waste gases containing harmful constituents such as carbon dioxide, dioxin, and furans. Safe disposal of slag and elimination of atmospheric pollution by waste gases are now a matter of serious concern in all steel producing countries.
Steel slag, in particular, basic oxygen furnace slag (BOF-S) – a by-product in the steelmaking industry – is an environmental challenge due both to the large volume of the material that is produced annually and its potentially detrimental environmental impacts. Globally, waste generation and management has become a critical issue with waste …
Abstract: Steel slag is one of the most common waste products from the steelmaking industry. Conventional methods of slag disposal can cause negative impacts on humans and the environment. In this paper, the process of steel and steel slag production, physical and chemical properties, and potential options of slag recycling were reviewed.
Along with iron and steel production, large amount of slag is generated. Proper management on the iron- and steelmaking slag is highly demanded due to the high cost of direct disposal of the slag to landfill, which is the most adopted management approach. In this article, the potential application of iron- and steelmaking slag has been …
Nickel smelting slag contains valuable metals including nickel and copper. Failure to recycle these metals wastes resources, and disposal of nickel slag in stockpiles results in environmental pollution. Nickel slag recycling is important, and metals can be recovered from slag by flotation. However, considering the complex forms in which …
The rapid increase in steel slag generation globally highlights the urgent need to manage the disposal or utilization processes. In addition to conventional landfill disposal, researchers have successfully reused steel slag in the construction, chemical, and agricultural fields.
Copper slag is a solid pollutant with high recyclability. Reduction and separation are regarded as effective disposal methods. However, during the melting process, the separation and migration behavior of elements in the copper slag is complicated. Thus, the formation of pollutants cannot be controlled merely by optimizing …
This paper discusses the most common method of solid waste disposal in Malaysia, focusing on the use of landfills.
Various remediation methods for mining waste have the potential to mitigate the challenges associated with slag disposal [ 12, 13 ]. Recently, to maximize the utilization value of copper slag according to the environmental impact and decarbonization, the reduction of copper slag with hydrogen was proposed by Zhang et al. [ 14 ], studying the ...
Steel slag is one of the most common waste products from the steelmaking industry. Conventional methods of slag disposal can cause negative impacts on humans and the environment.
Explore 10 key methods for hazardous waste disposal, ensuring safety for both the environment and human health.
Steel slag is an industrial waste that is generated during the production of steel. In the production of steel, oxides of metal impurities in the iron combine with the flux (which is usually a mixture of lime and dolomite) to form a molten layer …
Request PDF | An innovative method for recycling vanadium and valuable materials from high‑lime steelmaking slag disposal | A considerable amount (more than tens of millions of tons) of slag has ...
The mixture of blast furnace slag and limestone is introduced to produce cement clinker. The mixing composition of blast furnace slag and limestone is varied at weight percentage of 60, 70, and 74% calcium oxide (CaO) based on CaO–SiO 2 binary phase diagram. The results indicated that the slag clinker showing the alite and belite …
Slat slag with a particle size of 180 µm has superior qualities over slat slag with a particle size of 2 mm. Taking into account the environmental risks associated with slat slag disposal, its use in the cement construction industry has larger advantages.
Here, we review the lead slag physical and chemical characteristics, as well as environmental impacts. This review focuses on the utilization of lead slag: recovery of metals and used for construction materials. Various processes for metal recovery including pyrometallurgical, hydrometallurgical, and bioleaching methods are summarized.
Request PDF | Co-disposal of municipal solid waste incineration fly ash and bottom slag: A novel method of low temperature melting treatment | Conventional melting for disposing municipal solid ...
The new agreement will include advanced slag treatment processes for BOF and LAF slag's, leading to significant reductions in environmental impact versus traditional methods, along with high-efficiency metal recovery and the manufacture of co products from the residual slag's, for reuse into the cement, concrete and road base infrastructure ...
The types of waste include municipal, industrial, agricultural, and hazardous waste that poses a threat to the people and environment.
Conventional melting for disposing municipal solid waste incineration (MSWI) fly ash or bottom slag needed high temperature and consumed high energy. High calcium content in fly ash and high silicon content in bottom slag brought them high melting point, respectively. Based on the analysis of chemic …
In Malaysia, hazardous. waste is defined as scheduled waste. Scheduled wastes are any unwanted. matters whether in solid, se mi-solid, liquid, or gases which if emitted, released, deposited or ...
This study has shown that the waste copper slag from blasting operation can be safely solidified/stabilized in a cement-based S/S system. The leachability of copper, nickel, lead, and zinc ions presence in copper slag were lower than the regulatory limits. The mortar incorporating waste copper slag up to 10% replacement is, therefore, safe …
This study aims to compare the environmental impacts of two steel slag disposal methods from the perspective of a steel plant engineering system. The eFootprint, an online platform designed and developed by China IKE Environmental Technology Co., Ltd. (IKE; Chengdu, China), was utilized to conduct the LCA method.
The proper storage and management of mill tailings need a sizable amount of surface land imagined in Fig. 1 for wet disposal and Fig. 2 for dry disposal. An effective approach is to use mine backfill material to dispose of such engineering trashes (mine tailings, fly ash, slag, red mud, etc.) created by mining and related actions underground.
