The aim of this paper is to present a chemical composition and quantities of mining and processing waste landfills material developed during historical mining and smelting. After detailed inspection, it was found that approximately 2.6 gigatons of the waste had been deposited at 1650 sites, covering almost 65 km2. More than half of this …Web

Recently, authors have also investigated the use of Chilean coppertreated tailings as supplementary cementitious materials to improve properties of concrete [86,87], the use of copper tailings ...Web

Approximately 600 Mtonnes is produced a year and there is a historic stockpile of 28 000 Mtonnes deposited in either tailings storage facilities, dry stacked or back-filled in mines. When poorly managed, this waste can become an environmental hazard, causing problems such as acid-mine drainage, the outflow of acidic water from …Web

The re-processing of mine tailings to obtain critical raw materials (CRMs) could reduce the mining of new deposits as well as ensure the profitable use of the …Web

An independent study has lifted reserves and grades at Noble Mineral Resources' Bibiani gold project in Ghana.Noble says the Coffey Mining study lifted Bibiani gold reserves to 972,000oz (16Mt @ 1.9g/t) primarily due to higher grades at the Main pit, where reserves are now 820,000oz (11.5Mt @ 2.2g/t).MD Wayne Norris says Noble's …Web

The use of tailings as a raw material resource. can be one solution to the limited metal supply and a contribution. ... smaller mines in Zimbabwe (e.g., Bikita Mine) and China (e.g.,Web

... Based on the Si/Al ratio, different types of aluminosilicate chain structures are formed during geopolymerization (see Fig. 1) (Davidovits 1991).Web

The mining industry produces billions of tons of mine tailings annually. However, because of their lack of economic value, most of the tailings are discarded near the mining sites, typically under water. The primary environmental concerns of mine tailings are related to their heavy metal and sulfidic mineral content. Oxidation of sulfidic …Web

Currently, the development of new sustainable technologies to recover raw materials from secondary resources has shown a lack of available data on the processes and supplies involved, as well as their environmental impacts. The present research has conducted a life cycle assessment of electrodialytic (ED) technologies to improve critical …Web

Alkali activated materials are hardened, concrete-like structures that can be formed from raw materials that are rich in aluminum and silicon, which fortunately, are …Web

Most mines produce tailings as the final waste from mining the ore body, ore processing, and recovering the valuable metals and minerals. Mine tailings are the residue that results from mining, …Web

One of the main streams of wastes in mining is mine tailings, which are produced in mineral processing plants. The mining industry must enhance its contribution to achieving sustainable …Web

1. Introduction. The problem of environmental safety during the mining and processing of ore and mineral resources is acute worldwide. Intensive development of mining production promoted the accumulation of huge volumes wastes of mining and minerals separation process – the so-called "mine tailings" (MTs) (Xu et al., …Web

Bibiani remains fully permitted with available mining and processing infrastructure on site, consisting of a 3 Mtpa mill and processing plant and existing underground mining infrastructure. In August this year, Asante Gold acquired Bibiani for US$90 million. Resolute received the initial $30 million cash payment with the balance …Web

2. MINE TAILINGS AND TAILINGS FACILITIES: AN OVERVIEW. Mine tailings are the waste material that remains after the economic fraction has been extracted from the …Web

Japan uses flotation iron ore tailings and coal tailings as the main raw materials to make sewer clay pipes, and the Japanese Institute of Pollution Data has patented the use of them as lightweight porous material. China applies iron ore tailings to non-fired bricks, glass, glass-ceramics, fine concrete aggregates, and road bases.Web

The content of Au feed from current mines varies from 5 ppm to 1, depending on each mine 1 The tailings dams 4 and 5 are downstream, monitored and declared safe according to the national mining ...Web

The technical information contained in this news release relating to mining at the Bibiani Mine has been approved by Dave Anthony P. Eng., who is a "qualified person" within the meaning of ...Web

Chirano is an operating open-pit and underground mining operation located in southwestern Ghana, immediately south of the Company's Bibiani Gold Mine. Chirano was first explored and developed in ...Web

The growing demand for critical raw materials (rare earth elements—REE, Nb, Ta, and others) enforces a need to look for their alternative sources. Distortions of the mineral supply chain caused by COVID-19 have necessitated a re-evaluation of what exists as mining waste from previous exploitation. Consequently, this study aims to provide an …Web

The Challenge. Mining waste is one of the largest waste streams generated globally, estimated to exceed 100 billion tons every year. Our goal is to enable scientific advances and technology development for mining waste valorization and resource recovery, contributing to environmental protection and creating business and social …Web

Bibiani Mine uses four water sources for ore processing namely thickener overflow, levees, mine dewatering and decant water all of which converge in a pond, theWeb

for high tailings facilities in the deep valleys of the Andes in South America. 2.1 NET PRESENT VALUE ACCOUNTING APPLIED TO TAILINGS MANAGEMENT There is a commonly held perception that transporting tailings as a slurry to a facility is the most economic approach. However, to a large extent this tailings dewatering, density and …Web

Asante Gold Announces Acquisition of Resolute's Bibiani Gold Mine in Ghana for US$90 Million Cash. THIS NEWS RELEASE IS NOT FOR DISTRIBUTION IN THE UNITED STATES OR TO U.S. NEWS AGENCIES ...Web

Rare-earth metals' existing global reserves (in aggregate across different metals) are believed to be 120 million metric tons of rare-earth-oxide (REO) equivalent, representing 500 years equivalent of the global estimated production of 240,000 metric tons in 2020. 1 "Mineral commodity summaries: Rare earths," United States Geological …Web

In order to build green mines, goaf is often filled, supported, and sealed with a high-water material to eliminate a series of environmental problems and safety hazards caused by goaf. In this study, ordinary Portland cement, sulphoaluminate cement, and alkali-activated cement were used as binders to prepare full-tailings high-water materials for …Web

, A. Chaliasou, A. Kanellopoulos Add to Mendeley https://doi/10.1016/j.conbuildmat.2021.125333 Get rights and content • Up to 2060 …Web

Mine tailing storage represents an important environmental issue. The generation and dispersal of dust from mine tailings can contaminate air and surrounding soils. In addition, metals and soluble salts present in these wastes could pollute groundwater and surface water. The recovery of metals from mine tailings can contribute to minimize …Web

Circular economy Tailings Waste Valorisation Institution Digitalisation 1. Introduction Metals are essential in the transition to the green technologies e.g. in low …Web

In the next decades many of the old tailings storage facilities (TSFs) could be re-processed if one considers the prices of metals, new uses of metals which today are not valuable, and the application of new, more efficient metallurgical technologies. In this context, in-pit disposal of mine tailings (IPDMT) is an attractive alternative to be used as …Web

4. Raw materials of cement The basic raw materials of cement are limestone and clay. Limestone, claystone, shale, and other stones are common waste rocks that remained in the mining process. Besides, tailings containing corresponding components can also be used as basic raw materials of cement.Web

The need for low-cost raw materials is driven by the fact that iron ore tailings, a prevalent kind of hazardous solid waste, have created major environmental issues. Although many studies have focused on using iron ore tailing (IOT) in concrete and have reported positive results, readers may find it difficult to accurately assess the …Web

4.2.3 Tailings Solids. At metal mines, the amount of the ore mineral (s) extracted from an ore is relatively small, and the vast majority of mined and processed ore ends up as tailings. At modern gold mines, more than 99.999% of the originally mined and processed ore may finally become tailings.Web

Chirano is an operating open-pit and underground mining operation located in southwestern Ghana, immediately south of the Company's Bibiani Gold Mine. Chirano was first explored and developed in ...Web

In this review such chemically bonded ceramic methods that may be used to recycle mine tailings as raw materials, are reviewed while focusing in particular on two methods: 1) geopolymerization/alkali activation and 2) chemically bonded phosphate ceramics. ... Behaviour of mines tailings during hydraulic deposition. Int. J. Rock Mech. …Web