smelter of copper slag in Mexico

Recovery of Cu-Fe Alloy from Copper Smelting Slag

Copper smelting slag usually contains 1–6 wt% copper, which can be recovered by pyrometallurgical and flotation processes. However, the tailing slags still consist of 0.3–0.7 wt% Cu and 35–45 …

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Recovery of valuable metals from copper slag

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 …

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Archaeological Copper Smelting at Itziparâtzico, Michoacan, Mexico …

Mesoamerican copper metallurgy emerged in West Mexico sometime between A.D. 600 and 800. Over a period of approximately 900 years a wide variety of artifacts, typically decorations and other valuable non-utilitarian goods, were produced. ... Copper smelting slag recovered from the excavations at Itziparátzico has been …

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Early copper smelting at Itziparátzico, Mexico | Request PDF

Maldonado and Rehren (2009) calculated the copper to slag ratio of about 1:3.75 for the copper smelting in Itziparátzico Mexico by assuming that the iron …

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BACKGROUND REPORT SECONDARY COPPER …

Smelting of low-grade copper scrap begins with melting in either a blast or a rotary furnace, resulting in slag and impure copper. If a blast furnace is used, this copper is charged to a converter, where the purity is increased to about 80 to 90 percent, and then to a reverberatory furnace, where copper of about 99 percent purity is achieved.

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Behavior of Selenium in Copper Smelting Slag | SpringerLink

S.N. Sinha and M. Nagamori, "Activities of CoS and FeS in copper mattes and the behavior of cobalt in copper smelting", Metallurgical Transactions B, 13B, 1982, 461–70. Article Google Scholar

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Early copper smelting at Itziparátzico, Mexico | Request PDF

Maldonado and Rehren (2009) calculated the copper to slag ratio of about 1:3.75 for the copper smelting in Itziparátzico Mexico by assuming that the iron content of the slag originated almost ...

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Thermodynamic Analysis of Copper Smelting, Considering …

The extent of matte entrainment depends on turbulence in the furnace, slag fluidity (viscosity/density), operating temperature [], and surface and interfacial tension of matte and slag, as described by Nakamura et al. [].Bellemans et al. summarize the following reasons for metal entrainment in slag: charging of the furnace, oxygen …

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Archaeological Copper Smelting at Itziparátzico, Michoacan, Mexico …

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Direct-to-blister smelting of copper concentrates: the slag …

Direct-to-blister smelting of copper concentrates: the slag fluxing chemistry. P Taskinen [email protected] View all authors and affiliations. Volume 120, Issue 4. ... Taskinen P, Kojo I 2009 Fluxing options in the direct-to-blister copper smeltingProc. Molten 2009 Int. Conf. (ed., Sanchez M, et al.), 1139–1151, Conceptión, Univ. Conception, ...

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ASARCO's History

The plant smelts ore that is high in zinc and often rejected by other companies because of its contaminated slag. ... to create the "Great National Mexican Smelting Company," which establishes a lead smelter in Monterrey and a lead/copper smelter in Aguascalientes, Mexico. The Mexican government stations armed troops on …

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Early copper smelting at Itziparátzico, Mexico

Information provided by written sources, along with the factual presence of smelting waste products (i.e. slag) on the surface of archaeological areas near Santa Clara, suggest that the ongoing production of copper has its roots in pre-Hispanic traditions (Horcasitas de Barros, 1981, Maldonado, 2002, Maldonado, 2006).

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A Toxic Century: Mining Giant Must Clean Up Mess

After years of polluting and contaminating the environment, the American Smelting and Refining Company's notorious copper-smelting plant in El Paso, Texas, will be cleaned up this year. Asarco ...

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Introduction of Matte Droplets in Copper Smelting Slag

The slag, containing about 1–12% Cu, can be further processed to recover the copper contaminated, but recycle of the slag concentrate reduces overall productivity and efficiency of the operation. The best solution is to minimize the copper loss to the slag. The entrained matte droplets in copper smelting slag may originate from a few sources.

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Copper Smelting

The predominant copper process is reverberatory furnace smelting of sulfide concentrates to produce matte and slag, followed by treatment of the matte in converters to form blister copper. The offgases …

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Control of Copper Loss in Flash Smelting Slag | SpringerLink

The initial copper matte and slag were mixed with different chemicals to obtain the required compositions. FeS was added to prepare low-grade copper matte, SiO 2 was added to decrease the Fe/SiO 2 ratio of the slag, and the CaO from CaCO 3 was used to control its concentrations in the slag. Pure FeS, SiO 2, and CaCO 3 were …

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Turning Waste into Wealth: Breakthrough in Metal Recovery from Copper Slag

Newswise — Copper smelting is a major source of copper production, generating significant amounts of slag. In 2022, China produced over 11,000 kilotons of refined copper, leading to 2.2 to 3 ...

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Characteristics and utilisation of copper slag—a review

Investigation on the use of slag from copper smelting as fine aggregate in concrete was made by Akihiko and Takashi (1996). From mortar strength tests with cement/slag/water ratio of 1/2/0.55 the ball milled slag gave higher strength. The effects of several kinds of slag in mortar and concrete on alkali aggregate reaction, reinforcing …

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Hidalgo Copper Smelter Site, New Mexico

Hidalgo Copper Smelter Site, New Mexico. The remote Playas Valley contains the remains of Phelps Dodge's Hidalgo Copper Smelter, built here in 1971, to process copper from the mines near Silver City, which came by rail through Lordsburg.

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TENORM: Copper Mining and Production Wastes | US EPA

View the report, TENORM in SW Copper Belt of Arizona, on the TENORM Resources webpage. Smelter Slag. Smelter slag is initially deposited in piles. These slag piles range in surface area from one to 75 acres, and in height from three to 45 meters. Slag is associated with smelter operations, which may or may not be co-located with …

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Copper processing

Copper processing - Roasting, Smelting, Converting: Once a concentrate has been produced containing copper and other metals of value (such as gold and silver), the next step is to remove impurity elements. In older processes the concentrate, containing between 5 and 10 percent water, is first roasted in a cylindrical, refractory-lined furnace …

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New Mexico Geological Society

Phelps Dodge Corporation built the first flash furnace smelter in the U.S. in Hidalgo County, New Mexico. The Hidalgo smelter, equipped with two acid plants, was also the first smelter able lo meet the new air quality stan dards in the nation. This energy-efficient flash smelter was capable of smelting 2400 short tons of copper con

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New Mexico Geological Society

1890 Mexican ruler Porforio Diaz grants the Guggenheims the right to create the "Great National Mexican Smelting Company," which establishes a lead …

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Mesoamerican copper smelting technology aided …

Spanish invaders depended on indigenous expertise to produce copper for their artillery and other needs in Mesoamerica. Archaeologists found evidence of a hybrid furnace design using …

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Exclusive: Grupo Mexico's Asarco to reopen U.S. copper smelter …

Asarco, the mining company controlled by industrial conglomerate Grupo Mexico, is planning to restart its mothballed copper smelter in the United States as prices for the red metal hit record ...

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Kinetics of copper extraction from copper smelting slag …

1. Introduction. Copper is an indispensable basic raw material for modern industry, however, the grade of copper ore is relatively low in China for the reason that the copper mines are dominated by lean ore, associated ore, and symbiotic ore, especially in the process of smelting it is necessary to add fluxes such as calcium oxide and silica, …

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Characterisation of Secondary Copper Smelting Slag With …

In this study slag from secondary copper smelting is characterized with transmission electron microscopy in nano-scale. Crystalline spinel phases, amorphous slag matrix and areas enriched in Cu that can be interpreted as nano-scale metal droplets are observed. The same phases can be seen in SEM–EDS analysis in microscale and can …

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Kinetics of copper leaching from direct-to-blister copper …

Coppermaking from sulfide concentrates entails two major steps: smelting and converting. In continuous direct-to-copper smelting process these two steps are combined into one. The principal advantages of this process are: isolation of SO2 emission to a single, continuous, SO2-rich gas stream, minimization of energy consumption and …

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Mesoamerican copper smelting technology aided colonial …

But the Spanish desperately reqired large quantities of copper and tin, and in consultation with indigenous smelters introduced some European technology into the process. Hosler and her colleagues excavated an enigmatic feature that consisted of two parallel courses of stones leading toward a large cake of slag in the smelting area.

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Early copper smelting at Itziparátzico, Mexico

According to the Legajo 1204 (in Pollard, 1982: 258, 1987: 748; see also Warren, 1968), the schedule for payments of copper, of either every 40 days or on demand, substantially exceeds that of any other tributary item for the central authority.The Legajo further indicates that mining activities and smelting operations often took place …

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