disposal of mine slag
Structural Characteristics and Cementitious Behavior of Magnesium Slag
Magnesium slag is an industrial solid waste generated during the production of magnesium metal. In China, the smelting of magnesium metal via the Pijiang method is the main commercial process for magnesium production [1,2].More than 6 tons of magnesium slag is produced when smelting 1 ton of magnesium metal on average, and …
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Study on Procedure Toxicity and Harmless Disposal of Manganese Mine
The extraction procedure toxicity was effectively decreased by the harmless disposal when the proportion of cement and manganese in the whole mine slag was 60%, and the content of heavy metals in ...
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The potential for copper slag waste as a resource for a …
This work proposes an environmentally safe and economically feasible method of waste copper-nickel production slag utilization (Kola Mining-Metallurgical Company, Nornickel, Kola Peninsula, Russia).
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Co-disposal of MSWI fly ash and lead–zinc smelting slag …
Moreover, the leaching of Cu was always evaluated in terms of geopolymers synthesized from fly ash and industrial sludge [142], mine tailing [143], lead-zinc smelting slag [75], sludge ...
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Effects of slag-based cementitious material on the …
Effects of slag-based cementitious material on the mechanical behavior and ... The disposal of untreated tailings using tailing ponds not only requires large areas but also raises serious concerns regarding mine safety, the economy, and the environment [5, 6, 7]. In 2007, the
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Characteristics and environmental aspects of slag: A review
1. Introduction. Slag examined in this study is defined as the predominantly silicate and oxide by-product derived from smelting metallic ore. The two main types of slag included in this discussion are from the primary production of ferrous ores, from iron and steel manufacturing, and from non-ferrous ores, from the recovery of base metals and …
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Mining Waste | Special Wastes
Slag from primary zinc processing This web page provides an outline of the legislative and regulatory history, and current status of the mining waste exemption. Links to key …
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Enhancing the flotation recovery of copper minerals in …
Slag cooling beneficiation, which uses the surface property differences of sulfide minerals and oxide minerals to enrich valuable elements in the slag concentrate, is the most widely used method ...
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Review on Comprehensive Recovery Valuable Metals and …
Copper slag, a waste solid produced in the copper smelting process, is a high-quality secondary resource with huge output. The recycling and utilization of copper slag is of great interest because it avoids the loss of valuable metals and the threat of harmful metals, and saves a lot of natural resources and energy. This paper firstly …
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Recycling and Reuse of Mine Tailings | Encyclopedia MDPI
The activities involved in the intricate process of mining range from metal extraction (precious metals, ferrous alloys, and nonferrous materials), mineral beneficiation (gypsum, salt, kaolin, sulfur, and phosphate), fuels (hard coal, steam coal, petroleum, and coking coal), smelting, refining, and remediation [] [] [].The process of extraction …
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Methods for Recycling Mining Waste: A Review
Slag heaps contain concentrations of valuable metals that can be dissolved by the acids produced by certain microbes. Copper extraction rates of 91% have been achieved in this way under aerobic …
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Disposal of mine tailings via geopolymerization
Due to their high crystallization degree, mine tailings usually exhibit little reactivity in alkaline solutions compared with blast furnace slag and metakaolin, as reported by Obenaus-Emler et al. (2020), who explored the applicability of mine tailings from different sources worldwide as geopolymerization precursors.
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Advances in the use of recycled non-ferrous slag as a …
The S/S of OPC and AAMs is accepted as a well-established disposal technique for hazardous waste of non-ferrous slags. As a result, HMs in the slag would be chemically stabilized (Conner and Hoeffner, 1998). ... Dual waste utilization in cemented paste backfill using steel slag and mine tailings and the heavy metals immobilization …
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Disposal of mine tailings via geopolymerization
Geopolymerization is a promising technique for mine tailings disposal. • Lower strength was noticed using mine tailings as a single precursor. • Pretreatment …
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Slag-What is it Good for? | U.S. Geological Survey
Ferrous slag is currently underutilized. Although the construction industry does use some slag as an aggregate, most is simply discarded. However, slag could be …
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Occurrence characteristics and treatment technologies of mine …
In recent years, a large number of goaves in China have caused many engineering accidents and ecological security accidents, because of the continuous exploitation of mine resources. The goaf treatment is a highly complex project because varied types of mine goaf result in various safety problems. To settle the engineering …
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Environmental and Socioeconomic Impact of …
water dissolved from slag and mining operation became. ill and died; an effect on the water table and, ... D.R. Sustainable development principles for the disposal of mining and mineral ...
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What is Coal Slag? | Frequently Asked Questions
Also known as boiler slag, coal slag is a recycled product from coal burning plants. Learn more about its uses, effectiveness, safety information & more. COAL SLAG AND IRON …
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A detailed review study on utilization of mine and industrial …
The mining operation is a challenging field for human development. Deep underground mining has increased as a result of the lack of economic minerals close to the surface of the ground. Mining companies are now thinking of backfilling mine wastes to prevent mine collapse during later and deeper extraction stages due to safety and …
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Environmental performance of unfired bricks produced from co-disposal
Our recent work has demonstrated the co-disposal of abandoned mine tailings (AMT), ground granulated blast-furnace slag (GGBS), and incineration fly ash (IFA) of municipal solid waste as an environmentally, economically, and technically feasible approach for manufacturing unfired bricks (Wang et al., 2023).
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A practice of ultra-fine tailings disposal as filling material in …
A practice of cemented backfill technology with ultra-fine tailings in a gold mine was comprehensively presented, and a series of tests were conducted in accordance with the peculiar properties of ultra-fine tailings and the mining technology conditions. ... Relationship between USC and its tailing/slag ratio. Download: Download high-res …
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Slag-What is it Good for? | U.S. Geological Survey
Ferrous slag is currently underutilized. Although the construction industry does use some slag as an aggregate, most is simply discarded. However, slag could be used to treat acid soils or acid mine drainage. Doing so would both offset the cost of restoring abandoned mine areas, as well as decrease steel manufacturers' current …
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Mechanical property and structural evolution of alkali-activated slag
The present work studies consolidation of phosphate mine tailings through alkaline activation process with the addition of slag for adjusting the gel structure. As increasing slag contents in the raw materials, more (Na,K) 2 O–CaO–Al 2 O 3 –SiO 2 –H 2 O (C-A-S-H) and (Na,K) 2 O–Al 2 O 3 –SiO 2 –H 2 O (N-A-S-H) gels were formed in the …
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Physical and Chemical Properties of Coal …
Coal gasification fine slag is a kind of solid waste with low resource utilization rate. The complex embedding of residual carbon and inorganic minerals (ash materials) is the main reason restricting the …
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Waste coal gasification fine slag disposal mode via a …
1. Introduction. Coal has remained China's most important energy resource for a long time. Coal gasification is the core technology of clean and efficient coal conversion, and is the basis of technologies such as coal-to-chemicals, coal-to-oil and IGCC power generation [1], [2].GFS is the high carbon content fine particles produced in the …
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Deep Processing of Dump Slag from the Copper-Nickel …
slag, and the need for subsequent utilization or disposal of residues from primary slag processing. Since about 100 million tons of waste slag from copper and nickel production was accumulated at present, and it contains a low concentration of non-ferrous metals, their cost-effective processing requires using affordable and cheap reagents. In ...
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Cement-based solidification for the safe disposal of blasted copper slag
1.. IntroductionCopper slag is used as an abrasive in shot blasting to prepare steel surfaces for painting. The widespread use of lead and other heavy metals in protective paints [1] increases heavy metals in used slag, which is classified as a solid/hazardous waste. Landfill disposal of copper slag is not feasible since a few hundred tonnes are …
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Co-disposal of magnesium slag and high-calcium fly ash as …
DOI: 10.1016/j.jclepro.2020.123684 Corpus ID: 224988814; Co-disposal of magnesium slag and high-calcium fly ash as cementitious materials in backfill @article{Liu2021CodisposalOM, title={Co-disposal of magnesium slag and high-calcium fly ash as cementitious materials in backfill}, author={Lang Liu and Shishan Ruan and …
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Evaluation of the applicability of gasification coarse slag as a …
Gasification slag (GS) is rich in SiO2, Al2O3, and Fe2O3, and has excellent particle size gradation, which has the potential to be employed as an aggregate in the field of controlled low-strength material (CLSM). Nevertheless, the large-scale application of GS as the fine aggregate for the preparation of CLSM has been scarcely investigated. In the …
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Hydration and Pb Stabilization Mechanisms of Fly Ash–Slag-Based Mine
Abstract To completely replace Portland cement for mine backfilling, MSWI fly ash (FA) and solid metallurgical wastes (ground granulated blast furnace slag, steel slag and flue gas desulphurisation gypsum) were used to prepare fly ash-slag-based binder (FBB). The effect of FA content on the hydration and Pb stabilization mechanisms of the …
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