Materials Research at Alcoa

MRS Bulletin ◽  
1986 ◽  
Vol 11 (5) ◽  
pp. 22-25
Author(s):  
Noel Jarrett

The competitive forces that have dominated the aluminum industry over the last decade are similar to those in many other industries. New international competitors, driven primarily by their ability to compete with long-standing U.S. producers on the basis of cost and quality, have made significant inroads into virtually all aluminum markets.As more emerging nations, driven by the need to create jobs and hard currency rather than profits, entered the primary metal business and exported their output, ingot prices fell. Eventually, ingot became a commodity traded in the international marketplace, with metal prices no longer related to production costs.While these structural changes in the worldwide aluminum industry are of great concern (particularly in the United States), by no means do they signal the light metal's demise in the materials marketplace. What they have done, however, is to provide the impetus for the development and pursuit of economic and technical strategies designed to ensure long-term, profitable growth.By the beginning of the 21st century, most monolithic metals will be firmly entrenched as commodities. This will solidify emerging nations as key producers, based upon their access to raw materials, less costly labor and energy resources, and subsidized capital. The ability of companies like Alcoa to compete in this commodity marketplace will be based upon their ability to reduce manufacturing costs and provide technically-based product differentiation, primarily via quality control, through new and improved processing technologies.

2020 ◽  
Vol 159 ◽  
pp. 03002
Author(s):  
Gulzira Zhaxygulova ◽  
Maiya Myrzabekova ◽  
Guzel Sadykova

Beet sugar production is one of the material-intensive industries, where the volume of raw and auxiliary materials used in production is several times higher than the output of finished products. It is also a source of multi-tonnage secondary resources, i.e. by-products and production waste, the main ones beingAbeet pulp, molasses and filtration sludge. Against the background of the implementation of the Sectoral Program of Beet Sugar Production Development in the Republic of Kazakhstan for 2018-2027, there is a need to create a concept of ecologization of production, which will provide for the development of fundamentally new technologies to ensure minimum waste, combining environmentally friendly methods with cost-effective production of sugar beet and by-products. The bet should be made on low-cost technologies that will minimize production costs and environmental impact. In this article possible variants of sugar beet processing technologies with complex deep processing of waste are offered. The comparison of traditional technology and various variants of progressive technologies of sugar beet processing and production of new products from secondary resources was carried out, which allowed to determine revenue from complex processing of 1 ton of sugar beet.


2011 ◽  
Vol 15 (2) ◽  
pp. 281-292 ◽  
Author(s):  
Nikola Budimir ◽  
Marko Jaric ◽  
Branislav Jacimovic ◽  
Srbislav Genic ◽  
Nikola Jacimovic

This paper deals with the impact of the most important factors of the total production costs in bioethanol production. The most influential factors are: total investment costs, price of raw materials (price of biomass, enzymes, yeast), and energy costs. Taking into account these factors, a procedure for estimation total production costs was establish. In order to gain insight into the relationship of production and selling price of bioethanol, price of bioethanol for some countries of the European Union and the United States are given.


1992 ◽  
Vol 36 ◽  
pp. 121-137
Author(s):  
Frank R. Feret

X-ray fluorescence analysis has been used in the aluminum industry since the beginning of the 1950's. Initial applications involved predominantly raw materials such as bauxite. During the last decades its use expanded to every stage of aluminum production and today, XRF analysis is a recognized analyticaI technique, applied routinely in exploration, reduction and fabrication processes. Typical XRF applications in the aluminum industry at present are listed in Table 1. The number of determinations given represents usual industrial requirements, and may vary between laboratories. The sample preparation techniques are again the most commonly used for the applications.


2013 ◽  
Vol 28 (2) ◽  
pp. 112-123 ◽  
Author(s):  
Frank R. Feret

In the last few decades, X-ray diffraction (XRD) systems have been paramount and irreplaceable in controlling bauxite exploration, as well as Bayer and reduction processes. XRD quantitative phase analysis in the aluminum industry witnessed a steady deployment of the Rietveld method, which at present progressively replaces existing methodologies in research and plant laboratories. Rietveld analysis not only helped to surpass traditional XRD calibration methods, it also opened the door for new applications previously not possible. The use of the Rietveld method to characterize selected materials unique to the aluminum industry, such as bauxite, red mud, and alumina is demonstrated and discussed. This paper also presents how synchrotron-based diffractograms obtained for bauxite and red mud samples allowed a much better understanding of mineralogical representation, and made it possible to leverage their Rietveld quantification. Despite clear advantages, the Rietveld method also has limitations that are revealed. For alumina phase quantification, a dedicated Rietveld analytical program was built with structure data for eight alumina mineralogical phases: alpha, beta (β-Al2O3 = Na2O•11Al2O3), delta, gamma (2), kappa, sigma, and theta. The paper gives unique examples of phase quantification in aluminas of various origins and phase composition.


2021 ◽  
Vol 916 (1) ◽  
pp. 012024
Author(s):  
D Agustina ◽  
A D Wicaksono ◽  
C Meidiana

Abstract One of proposed strategies to solve current environmental challenges includes the industrial symbiosis. However, proper evaluation methods are required to measure the potential benefits of industrial symbiosis, one of those includes the material flow analysis (MFA). MFA develops a unified database and a Step-by-Step process starting from the input, process, and output process to clarify the distribution of waste and the recycling process in the aluminum industry. The aluminum industry is regarded as an energy-intensive and high-pollution industry. The development of industrial symbiosis in the aluminum industry has significantly reduced environmental pressures and facilitated green development and green industry. Home industries that process aluminum slag raw materials require high energy thereby generating high waste during the production process. The applied method includes material flow analysis (MFA). The MFA results indicated that the production elements of the aluminum slag industry consist of 11 elements ranging from raw materials, fuel, clean water, human resources, capital, production processes, production equipment, housekeeping, products produced, waste to waste utilization. Approximately 44% of the industry sold waste to other industries, 42% of the waste was reprocessed, and 14% of the aluminum industry stockpiles production was in the form of waste in open spaces. The industrial symbiosis in the aluminum industry was an open cycle, indicating that the symbiosis produces waste, which had not been fully utilized; but in fact, the waste had potential as a source of raw materials, energy, and materials in other industrial processes.


2016 ◽  
Vol 4 (3) ◽  
pp. 212-222
Author(s):  
Qiang Yue ◽  
Zaidong Fan ◽  
Chao Zhang ◽  
Fen Liu ◽  
Heming Wang ◽  
...  

AbstractThe whole process of aluminum cycle consists of four stages: Production of alumina and primary aluminum, fabrication and manufacture of aluminum products, use of aluminum final products, and recycling of obsolete aluminum products. Aluminum cycle in China in 2011 was analyzed using alumium flow diagram, and the following indices were obtained: The resource self-support ratio of alumina, aluminum and the whole aluminum industry were 53.18%, 95.58% and 54.85%, respectively; self-produced and net imported aluminum scrap use ratios of the aluminum industry were 4.68% and 7.98%, respectively. Aluminum cycles and aluminum flow indices in China of the year 1990, 1995, 2000, 2005 and 2008–2010 were also analyzed. It was found that from 1990 to 2011, imported Al-containing resources increased and imported bauxite has increased significantly since 2005. Resources self-support ratio of aluminum industry changed gradually from fully self-support to depencdent on the imports of raw materials. Self-produced auminum scrap use ratio presented downtrend basically and the imported aluminum scrap use ratio was greater than self-produced aluminum scrap use ratio after 1995.


2016 ◽  
Vol 17 (2) ◽  
pp. 80-104
Author(s):  
Jorge Alberto Lopez-Arevalo ◽  
Francisco Garcia-Fernandez ◽  
Rafael Alejandro Vaquera-Salazar

The aim of this study is to analyze Cuba’s foreign trade with three main partners during the so-called Special Period, a result from the dissolution of the Soviet Union in 1991. With the absence of the Mutual Economic Assistance Council (MEAC), Cuba had to make structural changes in its economy and foreign trade. A center-periphery model of doing business between Cuba and its trade partners was implemented. Under this model, China became Cuba’s main supplier of manufactured goods and Cuba supplied raw materials. Foreign trade in Cuba was limited due to the economic embargo from the United States. Nowadays, the relation between these two countries has become more of a trading collaboration. The United States has turned into one of Cuba’s main food suppliers, while Cuba exports art pieces and antiquities to that country. Russia also became a main exporter of manufactured goods and machinery to Cuba, just as China. In return, Cuba is sending raw materials to both of those countries.


2002 ◽  
Vol 1 (1) ◽  
pp. 1-12
Author(s):  
Claude Machline ◽  
Fernando Garcia ◽  
José Bento Amaral Jr. ◽  
Wilson Nobre

This paper's objective is to analyze the Brazilian aluminum production chain. We define production chain as the structured set of operations necessary to transform raw materials into a related group of finished products. The study of such a chain aims at increasing the competitiveness of its elements, focusing on their problems and devising solutions. The methodology adopted consisted in defining the basic production steps; visit plants and factories; interview executives; and analyze the wealth of data gathered. Some principles of production chain dynamics are proposed. The aluminum industry offers today, in Brazil, acute problems, due to currency devaluation, cost and scarcity of electrical energy, invoicing taxes and lack of economies of scale, which threaten its survival.


2006 ◽  
Vol 519-521 ◽  
pp. 1239-1244 ◽  
Author(s):  
Subodh K. Das

Recycling aluminum alloys has been shown to provide major economic benefits, as a result it is appropriate for the aluminum industry and the United States as a whole to identify, develop, and implement all technologies that will optimize the benefits of recycling. This paper will focus primarily alloy design for optimizing the reuse of recycled metal; this is both the most forward looking as we move toward a more recycling friendly world and the most overlooked for its potential in maximizing the recycle loop. Some specific approaches to alloy design for recycling are put forth, and some specific compositions for evaluation are proposed. Options for moving forward to further capitalize of the advantages of aluminum recycling are also addressed.


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