• منطقة بودونغ الجديدة ، شنغهاي ، الصين .
  • [email protected]

Mechanical, flowing and microstructural properties of ...

To understand the mechanical behavior, failure modes, and damage evolution of layered cemented paste … Expand. 15. Save. Alert. Effect of sulfide on the long-term strength of lead-zinc tailings cemented paste backfill. Qing Dong, B. Liang ... Expansion and strength properties of cemented backfill using sulphidic mill tailings. S. Yin, Y. Shao ...

اقرأ المزيد

Leaching of copper and zinc from the tailings sample ...

10%This research was aimed to investigate the leaching behavior of zinc and copper from a porcelain stone tailings sample using RSM-CCD modeling. The synergetic and individual effects of five main factors including liquid/solid ratio, sulfuric acid concentration, agitation speed, leaching time, and temperature were examined on the …

اقرأ المزيد

History of Mining in the Southeast Missouri Lead District ...

Viburnum Trend have lead and zinc circuits; most mills had or have copper circuits. Mine tailings (waste rock) from the mill-ing process are contained in a surface disposal area (tailings pond) and consists of gangue minerals (primarily dolomite) and minor amounts of ore minerals; flotation reagents also may be present.

اقرأ المزيد

Bi-level depth assessment of an abandoned tailings dam ...

The analysis of grades shows that the tailings have economic potential in tungsten and zinc; however, the embankment represents an environmental threat due to the high arsenic concentrations. The differences between grades in Table 2, Table 3 are due to differences in the sampling acquisition method, different measuring equipment and different ...

اقرأ المزيد

Exposure and Risk Assessment for Zinc

----- Table III-4 Zinc Released by Copper Mining Operations Effluents Solid Waste in Tailings Underground Mine, Tennessee Open Fit Mine, Montana Underground Mine, Michigan Open Pit Mine, Utah TOTAL Daily Accumulated Discharge Zn Discharge Total Amount Zinc Added m^/day Per Year MI of Zinc MT per year MT 32,700 0.48 35,960 0.66 121,120 1.77 ...

اقرأ المزيد

Bi-level depth assessment of an abandoned tailings dam ...

The analysis of grades shows that the tailings have economic potential in tungsten and zinc; however, the embankment represents an environmental threat due to the high arsenic concentrations.

اقرأ المزيد

Metal Recovery and Inorganic Eco-Materials from Tailings ...

Zinc oxide and lead oxide powders can be extracted from nonferrous mineral tailings by hydrometallurgy process, regarded as fresh precursory powders for Pb(Zn 1/3 Nb 2/3)O 3 functional ceramics, whereas magnetic Fe 3 O 4 nanopowders are refined, originated from multimetal tailing ore by leaching-separating-precipitation.

اقرأ المزيد

Surface disposal of paste tailings at the Bulyanhulu mine ...

The mill tailings have very low plasticity and show characteristics of clays and silts in terms of the Unified Soil Classification System. The particle size distribution of the tailings was 39.2% ...

اقرأ المزيد

Mine Tailings - an overview | ScienceDirect Topics

The severity of the negative environmental effects associated with tailings impoundments may not be evident until long after mine closure and decommissioning of the impoundments. The subsequent prevention and remediation of low-quality drainage waters are more difficult than during the active mining.

اقرأ المزيد

Easy Guide to Mining Waste Characterisation - EESI Group

Waste characterisation is the study of the environmental impacts of mining waste during mining, processing and above ground storage of ore prior to treatment. Waste characterisation needs to consider whether the waste will cause: acid & metalliferous drainage (AMD) saline and/or sodic drainage (i.e. neutral mine drainage) leaching and mobilisation of metals and toxic compound

اقرأ المزيد

Evaluation of paste backfill mixtures consisting of ...

Abstract Using mill tailings to produce paste backfill is a relatively new technique. The most important way in which paste backfilling is beneficial is through mine reclamation and elimination of adverse environmental effects of the tailings. This article includes discussions on the effectiveness of different paste mixes with varying cement contents and slump values in a …

اقرأ المزيد

Characterization of acid mine drainage at the Holden mine ...

market. While operating, over 212 million pounds of copper, 40 million pounds of zinc, 2 million ounces of silver, and 600,000 ounces of gold were extracted from 10 million tons of ore (MeWilliams, 1958). At present, the mine site consists largely of mill tailings, waste dumps,

اقرأ المزيد

Characterization of lead–zinc mill tailings, fly ash and ...

Chemically, the lead–zinc mill tailings is enriched in SiO2, CaO, Fe2O3, and Al2O3, whereas fly ash is mainly composed of SiO2 and Al2O3 with small …

اقرأ المزيد

Strength development and microstructural investigation …

The lead-zinc mill tailings used in this present study can be classified under the category of coarser tailings as the fines fraction (<20 μm) in the tailings is about 22% . The D 50 (29.10 μm) of fly ash is lesser than the mill tailings (D 50 = 37.92 μm). Hence, it is evident that the fly ash samples are relatively finer than the tailings.

اقرأ المزيد

Physical–Chemical Characterization of the Neves Corvo ...

Neves Corvo is an underground high-grade Cu–(Sn)–Zn mine, located in the Portuguese part of the world-class Iberian Pyrite Belt (IPB), which is currently producing copper, zinc, and lead concentrates. The operation is owned by SOMINCOR, a subsidiary of Lundin Mining, with a maximum capacity of 2.6 Mtpy for the copper processing plant and 1.0 Mtpy for …

اقرأ المزيد

Leaching of copper and zinc from the tailings sample ...

This research was aimed to investigate the leaching behavior of zinc and copper from a porcelain stone tailings sample using RSM-CCD modeling. The synergetic and individual effects of five main factors including liquid/solid ratio, sulfuric acid concentration, agitation speed, leaching time, and tem …

اقرأ المزيد

Characterization Studies on Lead-Zinc Tailings from ...

The recovery of sulfide minerals from the tailings not only will have environmental advantage but will also result in conservation of mineral wealth. For any such recovery activity, it is essential to characterize the tailings for physical, chemical and mineralogical characteristics. In the present study, typical lead-zinc tailings sample from

اقرأ المزيد

Chapter I A GEOENVIRONMENTAL MODEL FOR …

The dominant dissolved base metal in these waters is zinc (Zn). INTRODUCTION ... deposit models to include their environmental signature or environmental behavior. ... soils covered by jig tailings (i.e., Woodland Park and Smelterville Flats) or in tailings piles at mill sites (i.e., Interstate-Callahan and Success) is from McCulley, Frick, and ...

اقرأ المزيد

Concentrating Mill Wastes are the Source of Pollution of ...

Elevated contents of hazardous elements in natural ecosystems are often associated with human activities. Significant quantities of these elements, including heavy metals, are concentrated in tailings. The goal of the study was to assess the mineralogical and geochemical features of the old tailings of the decommissioned Krasnorechenskaya concentrating mill (located in …

اقرأ المزيد

Phytostabilization of Mine Tailings in Arid and Semiarid ...

Mineralogical and geochemical behavior of mill tailing material produced from lead-zinc skarn mineralization, Hanover, Grant County, New Mexico, USA. Environ Geol 26:1-18. Crossref, Google Scholar; Warhurst A, Warhurst A, Noronha L. 2000.

اقرأ المزيد

Leaching of zinc from a lead-zinc flotation tailing sample ...

The required sulphide–oxide samples were obtained from tailings generated from the lead-zinc flotation circuit at Bama processing plant (Isfahan, Iran). The samples were first crushed in a jaw crusher. Then samples were ground in a laboratory ball mill such as 90% of particles were finer than 150 μm in diameter.

اقرأ المزيد

2008 Sustainability Summary Pend Oreille Operations

settling behavior, leaching behavior, and physical composition and stability. at Pend Oreille, our tailings management plan has been designed to withstand environmental pressures and incorporate safeguards for unexpected situations. in February 2008, a thick layer of snow caused damage to the lining system of our tailings Disposal Facility

اقرأ المزيد

Chapter 6—Impacts of historical mining in the Coeur d ...

Environmental Protection Agency, 1994). There are no new sources of particulate Pb from smelters or tailings today be-cause of closure of the smelters and environmental regulations that prohibit the dumping of tailings into rivers. However, historically produced particu-late Pb from smelter fallout and mill tailings is constantly being ...

اقرأ المزيد

Optimization of Conditions for Processing of Lead–Zinc ...

In, the treatment of Pb–Zn flotation tailings was carried out by leaching zinc with iron sulfate, which leads to a high yield of zinc with a recovery of 94.3%. Various leaching agents (inorganic and organic acids, alkaline solutions and chelating agents) are used for the recovery of zinc from the tailings of the flotation of carbonate Pb ...

اقرأ المزيد

Publications - Knight Piésold - English

One of the largest diversified natural resource companies required a 110-hectare tailings storage facilities (TSF) as part of the new Zinc mine in the Northern Cape, South Africa. This facility and return water dam (RWD) were required to be covered by 1.5mm HDPE smooth and 1.5mm HDPE double textured geomembrane in specific areas to make up the ...

اقرأ المزيد

Tailings Backfill - 911 Metallurgist

The mill total tailings used as the basic aggregate in this test series came from three underground metal mines: Tailings A from a deep silver mine in Idaho, tailings B from a lead-zinc mine in Missouri, and tailings C from a copper-silver mine in Montana. Grain-size gradation curves are shown in figure 1.

اقرأ المزيد

Geotechnical Properties of Mine Tailings | Journal of ...

Characterization of the Tailings. The basic geotechnical properties of the four tailings are summarized in Table 1, and Fig. 1 displays the grain size distributions. The specific gravity of the coarse and fine iron tailings are 3.23 and 3.08, respectively, which are consistent with those of metal tailings but much higher than those of natural soils.

اقرأ المزيد

Mineralogical Controls on Aluminum and Magnesium in ...

Mill treatment processes are designed to generate tailings that minimize the long-term environmental impact of U tailings, although many challenges exist in reaching this goal.

اقرأ المزيد

Backfill Properties of Total Tailings

The mill total tailings used as the basic aggregate in this test series came from three underground metal mines: Tailings A from a deep silver mine in Idaho, tailings B from a lead-zinc mine in Missouri, and tailings C from a copper-silver mine in Montana. Grain-size gradation curves are shown in figure 1.

اقرأ المزيد

Technical Resource Document: Extraction and Beneficiation ...

EPA 530-R-94-011 NTIS PB94-170248 TECHNICAL RESOURCE DOCUMENT EXTRACTION AND BENEFICIATION OF ORES AND MINERALS VOLUME 1 LEAD-ZINC June 1994 U.S. Environmental Protection Agency

اقرأ المزيد

Mineralogical and geochemical behavior of mill tailing ...

10%In this study, mill tailings from inactive Pb-Zn mines in New Mexico, southwest USA, have been examined for their potential environmental impacts by means of detailed mineralogical and geochemical characterization.

اقرأ المزيد

Frontiers | Filling Treatment of Surface Subsidence ...

In the process of filling the goaf of Huashugou copper mine, the filling aggregate was the mine's self-produced copper flotation tailings. The physical and chemical property tests showed that the tailings were relatively fine, and the cumulative contents of the 7.5, 15, 80, and 90 μm particles were 56.99, 79.46, 99.88, and 100%, respectively. PSA42.5 Portland slag …

اقرأ المزيد

Environment-friendly Processing Technologies of Mine ...

The results of this study can provide a basis for minimizing environmental problems by providing scientific evidences of the environmental effects of mine tailings. In addition, it is also expected that these results could be applied to the treatment of pollutants of different origins and at land-based mining waste sites.

اقرأ المزيد

Multidisciplinary Approach to Remediating Watersheds ...

Mill tailings deposited on the flood plain of Basin Creek in the Boulder River watershed, Montana, 1998. USGS geologist and USDA-Forest Service engineer are discussing scientific findings of the USGS AML Initiative and implications for remediation being planned by the USDA-Forest Service for the Buckeye mine and mill tailings.

اقرأ المزيد

Feasibility of Using Lead–Zinc Tailings to Produce ...

There are large volumes of lead-zinc tailings (LZT) produced in China and elsewhere in the world. LZT disposal to the landfill is problematic and causes many environmental issues. The objective of this work is to demonstrate how LZT can be effectively used to produce ceramisite.

اقرأ المزيد

Extent of impact of deep-sea nodule mining midwater plumes ...

Deep-sea polymetallic nodule mining research activity has substantially increased in recent years, but the expected level of environmental impact is still being established. One environmental ...

اقرأ المزيد