Sustainable Methods of Dewatering and Disposal of …

Amongst many issues, the safe disposal of rejects from mining, beneficiation plants, ash from thermal plants, red mud from alumina refineries, and metallurgical slag and waste from smelters gained attention. Many countries have issued guidelines and promulgated new regulations for handling and safe disposal of mining, metallurgical, and ...

Formula and basic geochemical research to create new …

Vegetation restoration of slag heap (slope) is of great significance in environmental protection, but it is difficult because of the lack of soil. This study proposes a new technology for vegetation restoration of mine slag pile based on a mixed substrate of mine slag and soil. The ecological mechanism of vegetation in mountainous areas with soil–rock mix substrate was …

Main Areas of Utilizing the Burnt Rocks of Mine Dumps and Ash-slag

Among the CIS countries, the greatest experience in the disposal of ash, slag, and coal mining waste in road construction has been accumulated in Lugansk and Donetsk regions (Ukraine) [49, 122, 126, 153, 163]. The use of slag materials from the Burshtyn State District Power Plant (from burning coal of the Lviv-Volyn basin) allowed replacing up ...

The potential for copper slag waste as a resource for a …

Copper slag is one of the mining wastes that is raising growing concern due to the huge volumes being produced and dumped annually worldwide. These huge quantities of slag …

TENORM: Copper Mining and Production Wastes | US EPA

Disposal and Reuse. Some wastes from copper mines can be reused. Mixtures of crushed waste rock have been used to construct embankments, fills, or pavement bases for highways. ... Slag is associated with smelter operations, which may or may not be co-located with the mines. Copper slag can be used either as sandblast grit or an additive to ...

Recycle of steel slag as cementitious material and fine …

Using steel slag (SS) as cementitious material and fine aggregate in concrete is an effective and environmental method for SS consumption and cost reduction. In this paper, SS was recycled in large volumes in concrete as partial cementitious material and fine aggregate. The compressive strength and reaction mechanism of cementitious material with different SS …

Recovery of valuable metals from copper slag | Mining, …

The copper smelting process produces plenty of copper slag every year, which is a hazardous solid waste, but a secondary resource. In the present study, the extraction of copper, nickel, and cobalt from copper slag was investigated through the process of sulfation roasting–water leaching and the process of sulfation roasting–sulfate decomposition …

Modification and resource utilization of coal gasification slag …

Coal gasification technology has led to a significant increase in CGS discharge and consequently, the disposal of gasified solid waste gasification slag has become a major concern [10].It is reported that, more than 70 million tons of CGS is produced every year in China [11].Only a very small part of the slag is used, while the vast majority of CGS is simply dumped or …

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 could effectively …

Characteristics and environmental aspects of slag: A review

(a) Dissolved metal concentrations and pH during forward modeling of reactions between Cu slag and lake water, Penn Mine, California. Field data for the slag dump pore waters are represented by the larger symbols to the right of the dashed vertical line. (b) Secondary minerals produced during forward modeling simulation of irreversible mass ...

Sustainable practices in the management of mining waste: …

Table 1 shows estimates of mineral losses to tailings and slag compared to global production for seven different metals. Table 1. Global metal flows in mining estimated by two independent studies ... Mine waste disposal techniques have made some progress in recent years. In particular, compared to conventional tailings slurry disposal ...

Special Wastes | US EPA

Mining waste is one type of special waste. When EPA proposed regulations for managing hazardous waste under Subtitle C of Resource Conservation and Recovery Act (RCRA) on December 18, 1978 (43 FR 58946), the agency deferred hazardous waste requirements for six categories of waste—which EPA termed "special wastes"—until further …

Co-disposal of magnesium slag and high-calcium fly ash as …

A major concern of the backfill approach entails that a non-negligible proportion of Portland cement is often used (approximately 3–7 wt.% cement of the total dry weight, with some mines utilizing up to 10 wt%) (Qi and Fourie, 2019; Yilmaz et al., 2014).Notably, backfilling accounts for 25% of the total mining cost, of which approximately 75% is used for the …

Comprehensive review on metallurgical recycling and …

Combined with the relative merits of chemical leaching for the treatment of copper slag, the disposal of leaching slag with a low utilisation rate is a non-negligible factor for the …

Disposal of mine tailings via geopolymerization | Request PDF

Utilization of mine tailings via geopolymerization is a promising approach to convert them into value-added products. In this method, development an affordable and effective activation technology ...

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 produces significant amounts of …

TENORM: Copper Mining and Production Wastes | US EPA

Disposal and Reuse. Some wastes from copper mines can be reused. Mixtures of crushed waste rock have been used to construct embankments, fills, or pavement bases for …

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 environmental …

How can metal mining impact the environment?

Waste rock disposal areas are usually located as close to the mine as possible to minimize haulage costs. If not properly managed, erosion of mineralized waste rock into surface drainages may lead to concentrations of metals in stream sediments. ... These conditions still exist at some old or abandoned mines. Slag is a by-product of the ...

Preparation and strength mechanism of slag-based mine …

Considering the high-water environment in the LUFTs and the high-water sequestration of the ettringite, in this paper, a novel alkali-sulfate-activated slag binder suitable for the LUFTs with high water content (up to 45% in this work) was developed, where the granulated blast furnace slag (GBFS) was used as the cementitious material, the anhydrite was used as …

Slag recycling and reuse – GREENY approach

Slag often contains valuable metals that can still be recovered and utilized. Here's how we can help in combating the issue of uncrushable objects. Could you get value out of difficult to process secondary raw materials such …

Slag Recycling and Metal Recovery

As a result of growing environmental awareness, steel slag is now highly regarded as a recycled material that can reduce environmental impact due to its resource-conservation and energy-saving properties. MEKA is designing and …

What is Coal Slag? | Frequently Asked Questions

What is coal slag? This stuff is boiler slag, which is a recycled product from coal burning plants. When coal is "fired" at over 2500 degrees it melts and produces a by-product called slag. When the slag is cooled through a process called vitrification, it crystallizes, forming sharp, angular granules in a variety of sizes.

Soil contamination assessment for Pb, Zn and Cd in a slag disposal …

Improper disposal of mining waste is still considered a global problem, and further details on the contamination by potentially toxic metals are required for a proper assessment. In this context, it is important to have a combined view of the chemical and biological changes in the mining dump area. Thus, the objective of this study was to evaluate the Pb, Zn and Cd …

Disposal Methods on Solid Wastes from Mines in

More attention must be paid to the proper disposal of solid waste from mines n land utilization 721 Zengxiang Lu and Meifeng Cai / Procedia Environmental Sciences 16 ( 2012 ) 715 â€" 721 management and reducing the discharge of solid waste by the comprehensive utilization of mining waste must be promoted in a more active way. References [1 ...

Effective Mine Waste Disposal Methods | EddyPump

Due to the many variables, mining operations will need to develop their own methods of waste disposal in accordance with regulations pertaining to the different types of waste they produce. However, it is worth noting that a large portion of mining waste is benign to the environment and is routinely used to revegetate or contour the land when ...

Environmental performance of unfired bricks produced from co-disposal

PDF | On Mar 1, 2024, Ping Wang and others published Environmental performance of unfired bricks produced from co-disposal of mine tailings and municipal solid waste incineration fly ash based on ...

Research status of comprehensive utilization of coal-based …

The CSW filling mining technology can effectively solve the above problems, and is an important representative technology for realizing green and low-carbon mining, which has significant technical advantages in terms of improved extraction rate, surface subsidence control, ecological environmental protection, disposal and utilization of mine ...

Disposal of drilling waste in salt mines in China

Years of field monitoring results show that backfilling the salt mine with alkali slag and salt mud can effectively restrain the surface subsidence and prevent surface collapse. ... the waste water-based drilling fluid is mixed with the solid waste with large particles at the salt mine disposal site in China, so that the solid waste with large ...

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 present …

Slag recycling and reuse – GREENY approach

Mining Supporting your operations, from plant design expertise to equipment, parts and services for every stage of your process. ... Slag landfills can emit heavy metals to the environment (soil and water) for very long time periods what represents a high environmental impact. Instead of storing slag as industrial waste, it is nowadays ...

The potential for copper slag waste as a resource for a …

To address these challenges, recycling and repurposing of copper slag waste using innovative technologies should be considered, creating a resource for a circular economy. This …