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Friday, July 10, 2020 | History

3 edition of Low-Pressure Leaching of Duluth Complex Matte. found in the catalog.

Low-Pressure Leaching of Duluth Complex Matte.

United States. Bureau of Mines.

Low-Pressure Leaching of Duluth Complex Matte.

by United States. Bureau of Mines.

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Published by s.n in S.l .
Written in English


Edition Notes

1

SeriesReport of investigations (United States. Bureau of Mines) -- 8522
ContributionsHaas, L., Schluter, R., Nafziger, R.
ID Numbers
Open LibraryOL21738737M

composite of the material from the three Amax field study rock piles is referred to as the Duluth Complex Leach Pile (DCLP) and has a volume weighted average sulfur concentration of wt%. The DCLP was originally constructed to generate leachate for assessment and developtreatment methods for ing - metal rich acidic leachateBeginning in High Pressure Acid Leaching of Co Matte Converted from Co Concentrate Gunha Kim1, Ga-hee Kang1, Sangjun Kim1, Sookyung Kim2,*, Jeongsoo Sohn2 and Kyungjung Kwon1,* 1Department of Energy & Mineral Resources Engineering, Sejong University, Seoul , Republic of Korea 2Urban Mine Department, Korea Institute of Geoscience and Mineral Resources, .

verified by the sulphur contents and the X-ray diffraction patterns of leach residues. The dissolution ratio values of %, %, % and % Ni were obtained af 60, 90 and minutes of leaching, respectively, at acid/ore ratio of and leaching temperature of °C. In this study, the leaching. Scale , and , See the accompanying report RI for additional information and the Duluth Complex mapping digital files.

Low pressure leaching of Duluth complex matte / ([Pittsburgh, Pa].: U.S. Dept. of the Interior, Bureau of Mines, []), by L. A. Haas, R. H. Nafziger, R. B. Schluter, and United States. Bureau of Mines (page images at HathiTrust). The City of Duluth is issuing the results of monitoring done on its drinking water for the period from January 1 to Decem The purpose of this report is to inform consumers about laboratory test results of the drinking water and heighten awareness of the need to protect precious water resources.


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Low-Pressure Leaching of Duluth Complex Matte by United States. Bureau of Mines. Download PDF EPUB FB2

Low pressure leaching of Duluth complex matte (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors: L A Haas; R B Schluter; R H Nafziger.

A typical Duluth Complex bulk matte (60 pct Cu, 10 pct Ni, 5 pct Fe, and 20 pct S) has a higher copper-to-nickel ratio and a higher percentage of sulfur and iron. Since it is expected that mattes with different compositions would leach differently, research was initiated on a two-stage matte leaching method (fig.

1) similar to that described by. Low-pressure Leaching of Duluth Complex Matte. Authors Haas-LA; Schluter-RB; Nafziger-RH Source MISSING pages Link NIOSHTIC No. Abstract The Bureau of Mines conducted bench-scale leaching tests with recycled spent copper electrolytes and copper-nickel mattes produced from the Minnesota Duluth Complex concentrates.

Low pressure leaching of Duluth complex matte / By L. (Larry A.) Haas, R. (Ralph H.) Nafziger, R. (Robert B.) Schluter and United States. 90 pct minus agitator speed airflow analyses Autoclave leaching base metal base metal extraction Low-Pressure Leaching of Duluth Complex Matte.

book of Mines Composition concentration contained 70 containing copper and nickel copper extraction decreased determine difficult dissolved dropped Duluth Complex Duluth Gabbro electrowinning essentially Experimental extraction level ferric figure.

It has been established for a model sample (wt. %: 62 Ni, Cu, Fe, Co, 18 S) that processing converter matte under conditions of increased oxygen pressure is much more effective than under atmospheric conditions, and this is indicated by a reduction in the duration of pressure leaching (– h) compared with leaching under.

High-pressure leaching of matte was performed in an autoclave with considering the effect of oxidizing agent, H_2SO_4 concentration as a lixiviant, and the amount of sulfur added to the matte. A higher sulfur content in the matte enhances leaching rate of matte slightly. The leaching results are well matched with physicochemical characterization of Co concentrate, matte.

EFFECT OF PRECIPITATION PATTERN ON LEACHING OF PRESERVATIVE FROM TREATED WOOD AND IMPLICATIONS FOR ACCELERATED TESTING Stan Lebow1 ABSTRACT There is a need to develop improved accelerated test methods for evaluating the leaching of wood preservatives from treated wood exposed to precipitation.

In this study the. earliest, most successful pressure leaching flowsheets which is still in operation today: the Fort Saskatchewan plant was constructed inprimarily to process complex copper-nickel-cobalt ores.

The process consists of a series of pressure leach vessels to oxidatively leach nickel and copper in an ammonium lixiviant. Pressure leaching is the chemical dissolution of soluble minerals within a solid ore or concentrate carried out at elevated pressures and giving rise to a solution containing metals to be recovered.

The process is carried out in closed autoclaves which permit higher temperatures (>°C) and pressures (>20 atm) than are possible with open tanks. The higher potential is used to promote leaching of the gold into the solution in the form of a tetrabromide complex.

In the first leaching stage, chalcopyrite is leached by oxygen with the formation of covellite and cupric ions. In the second stage, in addition to oxygen, the bivalent copper ion also takes part in the oxidation of chalcopyrite.

Two general categories of low-pressure drainfields (LPD) are recognized based upon the strength of wastewater being dosed: low-pressure pipe (LPP) and shallow narrow drainfields. LPP is typically installed in a trench and the pipe is supported by stone or other material. A shallow narrow drainfield is typically installed at the base of a.

A study has been carried out to elucidate the leaching mechanism of Ni–Cu matte in an acid–oxygen (CuSO 4 –H 2 SO 4 –O 2) pressure leach process at Impala Platinum process is based on the initial Sherritt Gordon process at a temperature of °C and a pressure of kPa.

A review of the literature over the past 30 years on the processing of nickel laterites by high temperature acid leaching has been carried out to provide a better understanding of the mineralogy, leaching process chemistry and effect of operating conditions on nickel recovery, residue properties and scaling.

8 October 25th, Drivers for Concentrate Leaching Cost effective alternative to conventional smelting & refining Capital cost versus greenfield smelter/refinery projects $1, versus $3,/annual tonne Ability to utilize existing SX capacity ($/annual mt) Ability to utilize spare EW capacity ($/annual mt) Ability to utilize existing infrastructure.

About this book Published by the American Geophysical Union as part of the Field Trip Guidebooks Series, Volume The four and a half day itinerary of the Duluth Complex portion of Field Trip No.

T covers km and includes. Geology and Mineralogy of NorthMet and the Duluth Complex. The NorthMet deposit is located in the Partridge River Intrusion of the Duluth Complex, a massive geological formation near the eastern end of the Mesabi Iron Range, which contains one of the world’s largest known undeveloped accumulations of copper, nickel and platinum group metals.

Leaching is the process of a solute becoming detached or extracted from its carrier substance by way of a solvent. Leaching is a naturally occurring process which scientists have adapted for a variety of applications with a variety of methods.

Specific extraction methods depend on the soluble characteristics relative to the sorbent material such as concentration, distribution. The Principles and Practice of Leaching focuses on advances in the leaching of metals from various ores and concentrates. The articles presented in this volume represent thirteen countries scattered through five continents.

This is a reflection of the international effort being expended to advance the theory and practice of leaching. Industrial Application Leaching is widely used in the biological and food processing industries, such as the separation of sugar from sugar beets with hot water.

The extraction of oils from peanuts, soybeans, sunflower seeds, cotton seeds, and halibut livers. In pharmaceutical industry, many products are obtained by leaching plant roots, leaves.The Minerals Division of the Minnesota Department of Natural Resources (DNR) is examining leaching characteristics of minerals that would likely be present in tailing produced by mining and concentrating copper- and nickel sulfide-bearing ores from the Duluth Complex.The complex interactions of the various minerals with one another were clarified by considering the change in the mineral species during the leaching process.

It was found that the key to the selective leaching of the nickel from the Ni-Cu matte is that while leaching Ni3S2, copper ions in solution are continuously precipitated as Cu2S in a.