the need for knowing residual xanthate in tailings streams

METHOD FOR IMPROVING SELECTIVITY AND RECOVERY …

After flotation, the concentrate and tailings waters from each test were collected and analyzed for residual DETA, Cu and Ni. The results of the analyses are summarized in Table 9. The decreased residual levels of DETA, Cu and Ni obtained with the use of the new mixture of …

(PDF) The Environmental Fate of Flotation Collectors in ...

The results obtained give some insight into the environmental fate of ethyl xanthate in tailings streams, and a basis on which to consider the environmental importance of such species in tailings ...

Muzinda, Ishamael; Schreithofer, Nóra Water quality ...

decomposition of residual xanthate is complete as the residence time in the tailings pond is longer, and the sunlight provides the UV light and elevated temperatures that speed up the decomposition reactions. In winter, sub-zero temperatures prevail for 5–6months during which an ice cap forms on the decant pond. Elevated levels of residual

Process effluents and mine tailings: sources, effects and ...

2016-12-19 · Increasing population levels, growing economies, rapid urbanization and changes in consumption patterns have increased the demand for raw materials such as base and precious metals, leading to growing concerns regarding their availability and the global efficiency of the mine supply chain. Mine tailings, consisting of process effluents that are generated in a mineral processing plant, are ...

Monitoring the composition of water of flotation slurries ...

2003-11-1 · In addition to inorganic species originating from minerals and process modifiers, residues of organic process chemicals may be present in the liquid-p…

Processing asphaltene-containing tailings

2006-3-7 · These streams can be subjected to further processing. Light Tailings . The light tailings 46 that exit the separator 42 can be processed to recover an asphaltene concentrate 50. In some disclosed embodiments, hydrophobic agglomeration is used to recover the asphaltene concentrate 50.

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Processing asphaltene-containing tailings

2006-3-7 · These streams can be subjected to further processing. Light Tailings. The light tailings 46 that exit the separator 42 can be processed to recover an asphaltene concentrate 50. In some disclosed embodiments, hydrophobic agglomeration is used to recover the asphaltene concentrate 50.

Environmental Impacts of Elliot Lake Mill Tailings

2016-2-22 · An alternate estimate of radioactivity in Elliot Lake tailings shows that 1 tonne of tailings has a radioactivity of at least 1.85 x 10 8 Bq, or 5.0 x 10 -3 Ci of radioactivity. Thus, Elliot Lake contains approximately 710,000 Curies of long-lived radionuclides. About 90% …

Water quality effects on flotation: Impacts and control of ...

2018-8-15 · Measurements of the xanthate concentrations in the process water recycled from the tailings pond and two plant slurry tailings samples was initiated in March 2017 for the purposes of monitoring and control. Fig. 9 shows the residual xanthate measurements from March to date. It can be seen that owing to summer conditions, dilution from water ...

Review of Practices in the Managements of Mineral Wastes ...

2021-6-25 · Mining plays an essential role in resource-rich countries given that it constitutes a source of raw materials and incomes capable of contributing to the economic growth. However, with the intensive mechanisation of mining operations and the modernisation of the ore-processing technologies in view of increasing the productiveness, growing amounts of mineralised rocks are currently excavated ...

Residual Xanthate

2021-10-4 · Finally, you reduce toxic CS2 gas emissions in your tailings. If I was a reagent manufacturer, I would recommend to dose and forget it. If you are interested …

Kinetics and mechanism of the oxidation of ethyl xanthate ...

The degradation behavior of ethyl xanthate (EX) salt was the most widely used collector in sulfide mineral flotation and emission of flotation tailings with residual EX was harmful to environment.

Metal Mining Investigation of Cause Workshop: chapter 6 ...

2021-10-28 · The CNT decrease over time (average of 19.5 ± 2.0 mg/kg in fresh tailings compared to 3.2 ± 0.7 mg/kg in aged tailings) is believed to result primarily from volatilization (decrease in pH), leaching, and bacterial degradation. The results of this study also highlighted the role of microbial activity in the fate of cyanides in mine tailings.

Acid mine drainage: electrochemical approaches to ...

Acid mine drainage (AMD), caused by biological oxidation of sulfide minerals in the presence of air and water, is a significant environmental problem because of its acidity and the presence of high concentrations of iron and solubilized toxic metal ions. The focus of this review is to consider the prospects for electrochemical technologies for either prevention or remediation of AMD, with ...

Toxicity of nickel to soil microbial community with and ...

2017-5-11 · The toxicity of nickel and three of its main collectors, sodium isopropyl xanthate (SIPX), sodium ethyl xanthate (), and potassium ethyl xanthate (PEX) to soil microbial activity, was analyzed, individually and as a binary combination of nickel and each of the collectors. The investigation was performed through the microcalorimetric analysis method. For the single chemicals, all power-time ...

Free

2021-10-25 · I was wondering if anyone is checking into "free Xanthate" or "residual Xanthate" in flotation circuit; specifically in copper flotation ''s more common in Gold leaching to always keep tabs on your "Free Cyanide", but in Copper flotation there is very little interest in knowing what''s the residual Xanthate after first rougher, second rougher, etc.

Environmental guidelines for the management of small ...

2021-6-2 · Introduction 1. Summary. Regulatory requirements for the management of all tailings storage facilities (TSFs) in Victoria are set out in the Environmental Guidelines – Management of Tailings Storage Facilities 2004, published by the Earth Resources Regulation unit and referred to in this document as MTSF 2004.. Subordinate to MTSF 2004, this document has been produced to provide a simplified ...

(PDF) Degradation of ethyl xanthate in flotation residues ...

2021-6-13 · Abstract and Figures. The degradation behavior of ethyl xanthate (EX) salt was the most widely used collector in sulfide mineral flotation and emission of flotation …

Study of xanthate decomposition in aqueous solutions ...

2021-9-21 · In this work, the degradation of ethyl xanthate (EX) collector by O3, UV254nm, UV185+254nm, O3/UV254nm and O3/UV185+254nm was compared. The TOC and SO4²⁻ concentrations were measured to study ...

(PDF) Integrated mine tailings management by combining ...

The residual sulphur phurization level reached in these conditions is enough to content obtained was 0.24 wt% after 10 min flotation at a avoid the acid generation for the Doyon tailings. collector dosage of 80 g/t of xanthate (Fig. 1A).

SCHOOL OF CHEMICAL ENGINEERING UQ Summer …

2020-9-10 · Description: Xanthate is one of the most common organic sulphur -based collectors which are widely used in the froth flotation of sulphide minerals as well as in the production of viscose rayon and pesticides. However, the residual xanthate and its by-products in wastewater are not allowed to be disposed of into environmental streams due to both

(PDF) Arsenic Sorption Characteristics in Decommissioned ...

Concentration levels of some inorganic contaminants in streams and sediments in areas of pyrometallurgical and hydrometallurgical activities at the Obuasi gold mine, Ghana By Gordon Foli (PhD) Arsenic Leaching in Mill Tailings at the AngloGold Ashanti-Obuasi Mine, Ghana: management of contamination in the related water environment

Life Cycle Assessment of the Production of Xanthate …

2020-12-8 · Xanthate salts are commonly used as collectors in the mineral processing of sulphide ores. In more recent studies, xanthate has also been used in the environmental desulphurisation flotation of sulphidic mine tailings and coal waste, with a view to mitigating acid rock drainage (ARD) risks through the pre-disposal removal of sulphide minerals.

Cyanide removal from aqueous streams

The total tailings are pumped at an estimated pressure of 450 psi (about 3100 KN/m 2) to a tailings pond 300 feet uphill with a retention time of .about.8 minutes in pipe. The example shows that with no addition of Na 2 S 2 O 5 to the tailings, the CN T at the end of the pipe is 19 mg/L.

A review of the effect of water quality on ...

2013-11-1 · Therefore, there is an essential need to develop a method which could help set up clear objectives and therefore target the monitoring at the desired water streams. The way the information on water quality variation in flotation is organized, i.e., from the perspective of internal and external factors, could be a starting point for developing ...

Design and measurement of small recovery gains: A case ...

2010-6-1 · The streams used were: rougher float feed, final concentrate, and final tailings. Each shift of production operation produced a 12-h composite sample of each of these streams. In addition to the base metal assays which were performed by the site laboratory, subsamples had to be extracted using a spinning riffler for fire assay.

Methods for mine tailing clean-up using recovery ...

1991-2-11 · A method for site remediation for mitigating contamination from metals or metal compounds, particularly resulting from the situation of mine tailing waste on or near water sources, including the reprocessing and redeposit of separated sands and slimes in-site in a manner to encourage rather than inhibit leaching of residuals by chelating agents or biological agents with recovery of leachate ...

Process effluents and mine tailings: sources, effects and ...

Nanotechnol. Environ. Eng. Process effluents and mine tailings: sources, effects and management and role of nanotechnology Dipti Prakash Mohapatra 0 1 Deepak M. Kirpalani 0 1 0 Energy, Mining and Environment Portfolio, National Research Council of Canada, 1200 Montreal Road, Ottawa, ON K1A 0R6, Canada 1 & Deepak M. Kirpalani Increasing population levels, growing economies, rapid …

Resource recovery from sanitation to enhance ecosystem ...

2019-6-24 · These examples suggest the need for future research into the potential of new sources of financing to capitalize on the potential value of underexplored linkages …

Geometallurgical approach to understand how the ...

2017-9-1 · Zinkgruvan orebodies affects the need for copper activation in the bulk rougher-scavenger flotation Ivan Belo Fernandes Geosciences, master''s level (120 credits) 2017 Luleå University of Technology Department of Civil, Environmental and Natural Resources Engineering